As filed with the Securities and Exchange Commission on June 21, 2001 Registration No. 333- - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ------------ FORM S-4 REGISTRATION STATEMENT Under The Securities Act of 1933 ------------ CROWN CASTLE INTERNATIONAL CORP. (Exact name of Registrant as specified in its charter) Delaware 4899 76-0470458 (State or other (Primary Standard (I.R.S. Employer jurisdiction of Industrial Identification Number) incorporation or Classification Number) organization) ------------ Mr. W. Benjamin Moreland Senior Vice President Chief Financial Officer and Treasurer 510 Bering Drive Suite 500 Houston, Texas 77057 (713) 570-3000 (Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices) ------------ Copies to: Stephen L. Burns, Esq. Cravath, Swaine & Moore 825 Eighth Avenue New York, New York 10019 ------------ Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective. If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. [_] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_] If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [_] CALCULATION OF REGISTRATION FEE - ------------------------------------------------------------------------------ - ------------------------------------------------------------------------------ Proposed Proposed Maximum Title of Each Class of Amount Maximum Aggregate Amount of Securities to be to be Offering Price Offering Registration Registered Registered Per Unit Price(1) Fee(2) - ------------------------------------------------------------------------------ 9 3/8% Senior Notes Due 2011.................. $450,000,000 100% $450,000,000 $112,500 - ------------------------------------------------------------------------------ - ------------------------------------------------------------------------------ (1) Estimated solely for the purpose of calculating the registration fee under Rule 457 of the Securities Act of 1933. (2)Calculated pursuant to Rule 457(f)(2). ------------ The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine. - -------------------------------------------------------------------------------- - --------------------------------------------------------------------------------

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +The information in this prospectus is not complete and may be changed. We may + +not sell these securities until the registration statement filed with the + +Securities and Exchange Commission relating to these securities is effective. + +This prospectus is not an offer to sell these securities and it is not an + +offer to buy these securities in any state where the offer or sale is not + +permitted. + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ SUBJECT TO COMPLETION, DATED JUNE 21, 2001 PROSPECTUS [LOGO OF CROWN CASTLE INTERNATIONAL] CROWN CASTLE INTERNATIONAL CORP. -------- OFFER TO EXCHANGE UP TO $450,000,000 PRINCIPAL AMOUNT OUTSTANDING 9 3/8% SENIOR NOTES DUE 2011 FOR A LIKE PRINCIPAL AMOUNT OF REGISTERED 9 3/8% SENIOR NOTES DUE 2011 The new 9 3/8% Senior Notes Due 2011 will be free of the transfer restrictions that apply to our outstanding, unregistered 9 3/8% Senior Notes Due 2011 that you currently hold, but will otherwise have substantially the same terms of these outstanding old notes. This offer will expire at 5:00 p.m., New York City time, on , 2001, unless we extend it. The new notes will not trade on any established exchange. -------- Please see "Risk Factors" beginning on page 10 for a discussion of certain factors you should consider in connection with the exchange offer. -------- Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the new notes or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense. -------- The date of this prospectus is June 21, 2001.

------------ TABLE OF CONTENTS Page Page ---- ---- Where You Can Find More The Exchange Offer............... 22 Information....................... ii Description of Notes............. 30 Incorporation of Documents by Certain U.S. Federal Income Tax Reference......................... ii Considerations.................. 70 Prospectus Summary................. 1 Plan of Distribution............. 70 Risk Factors....................... 9 Legal Matters.................... 71 Use of Proceeds.................... 17 Experts.......................... 71 Selected Financial and Other Data.. 18 Certain Currency Translations.... 71 ------------ i

WHERE YOU CAN FIND MORE INFORMATION We file annual, quarterly and special reports, proxy statements and other information with the SEC. Our SEC filings and other information regarding issuers are available to the public over the Internet at the SEC's web site at http:/www.sec.gov. You may also read and copy any document we file with the SEC at the SEC's following public reference facilities: Public Reference Room New York Regional Office Chicago Regional Office 450 Fifth Street, N.W. 7 World Trade Center Citicorp Office Room 1024 Suite 1300 500 West Madison Street Washington, D.C. 20549 New York, New York 10048 Suite 1400 Chicago, Illinois 60661- 2511 Copies of these documents may also be obtained at prescribed rates by writing to the Public Reference Section of the SEC at 450 Fifth Street, N.W., Room 1024, Washington, D.C. 20549. Please call 1-800-SEC-0330 for further information on the operations of the public reference facilities. Our SEC filings are also available at the offices of the New York Stock Exchange at 20 Broad Street, New York, NY 10005. INCORPORATION OF DOCUMENTS BY REFERENCE The SEC allows us to "incorporate by reference" the information we file with them into this prospectus, which means that: . incorporated documents are considered part of this prospectus; . we can disclose important business and financial information about us, that is not included in or delivered with this prospectus, to you by referring you to those other documents; and; . information contained in later-dated documents will supplement, modify or supersede, as applicable, the information contained in earlier- dated documents, and information that we subsequently file with the SEC will automatically update and supersede this incorporated information. We incorporate by reference into this prospectus the documents listed below, as amended and supplemented, and all documents filed by us with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 after the date of this prospectus and prior to the time that the exchange offer made hereby is completed: . Annual Report on Form 10-K, as amended, for the year ended December 31, 2000; . Current Reports on Form 8-K dated January 12, 2001, January 16, 2001, April 27, 2001 and May 10, 2001, and Amendment No. 1 to Current Report on Form 8-K/A dated April 11, 2001; . Our Definitive Proxy Statement dated May 8, 2001; and . Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2001. You can obtain any of the filings incorporated by reference into this document through us or from the SEC through the SEC's web site or at the addresses listed above. Documents incorporated by reference into this prospectus, except for any exhibits to those documents that are not expressly incorporated by reference into those documents, are available from us without charge by requesting them in writing or by telephone at the following address and telephone number: Crown Castle International Corp. 510 Bering Drive Suite 500 Houston, Texas 77057 Attention: Corporate Secretary Telephone: (713) 570-3000. ii

If you request any incorporated documents from us, we will mail them to you by first class mail, or by another equally prompt means, within one business day after we receive your request. However, in order to obtain timely delivery of these documents, you must make your request no later than five business days before the expiration date of the exchange offer. Unless the context requires otherwise, all references in this document to "this prospectus" include all documents incorporated by reference into this prospectus. iii

PROSPECTUS SUMMARY This summary highlights information contained elsewhere in this prospectus or incorporated by reference herein. It may not contain all the information that is important to you. We encourage you to read this entire prospectus and each of the incorporated documents carefully. The Company We are a leading owner and operator of towers and transmission networks for wireless communications and broadcast transmission companies. As of December 31, 2000, we owned, leased or managed 12,918 towers and rooftops, including 9,872 sites in the United States and Puerto Rico, 2,330 sites in the United Kingdom and 716 sites in Australia. Our customers currently include many of the world's major wireless communications and broadcast companies, including Verizon, Cingular, Nextel, Sprint PCS, AT&T Wireless, Cable & Wireless Optus, Vodafone, BT Cellnet, One 2 One, Hutchison and the British Broadcasting Corporation. Our strategy is to use our leading domestic and international position to capture the growing opportunities to consolidate ownership and management of existing towers and other wireless and transmission infrastructure and to build and operate new towers and wireless and transmission networks and infrastructure created by: . the transfer to third parties, or outsourcing, of tower ownership and management by major wireless carriers; . the need for existing wireless carriers to expand coverage and improve capacity; . the additional demand for towers and wireless infrastructure created by new entrants into the wireless communications industry; . the privatization of state-run broadcast transmission networks; and . the introduction of wireless technologies including broadband data, or "3G" technology. Our main businesses are leasing antenna space on wireless and broadcast towers that can accommodate multiple tenants and operating analog and digital broadcast transmission networks and wireless networks. We also provide related services to our customers, including network design, radio frequency engineering, site acquisition, site development and construction, antenna installation and network management and maintenance. We believe that our full service capabilities are a key competitive advantage in forming strategic partnerships to acquire large concentrations of towers, or tower clusters, and in winning contracts for tower acquisitions, management and construction along with wireless and transmission network management. Our primary business in the United States is the leasing of antenna space to wireless carriers. We believe that by owning and managing large tower clusters we are able to offer customers the ability to fulfill rapidly and efficiently their network expansion plans across particular markets or regions. Our acquisition strategy has been focused on adding tower clusters to our tower portfolio. As of December 31, 2000, we had tower clusters in 34 of the 50 largest U.S. metropolitan areas, and 68 of the 100 largest U.S. metropolitan areas. Our primary business in the United Kingdom, which is conducted through our subsidiary Crown Castle UK Holdings Limited, or "CCUK", is the operation of television and radio broadcast transmission networks and the leasing of antenna space to wireless carriers. Following our 1997 acquisition of the BBC's broadcast and tower infrastructure, we were awarded long-term contracts to 1

provide the BBC and other broadcasters analog and digital transmission services. We also lease antenna space to wireless operators in the United Kingdom on the towers we acquired from the BBC, as well as on various towers that we acquired from wireless carriers or that we have constructed. We have nationwide broadcast and wireless coverage in the United Kingdom. In November 2000, CCUK entered into an agreement with British Telecommunications plc, or "British Telecom", to lease space on as many as 4,000 British Telecom exchange sites throughout the United Kingdom. We expect to invest approximately $325 million over the next two years developing the British Telecom site portfolio for the deployment of 3G wireless services. In February 2001, CCUK signed a definitive agreement with Hutchison 3G UK Limited, or "Hutchison", whereby Hutchison will lease space on a minimum of 4,000 CCUK sites (a minimum take up of 1,000 sites per year for each of 2001 through 2004) throughout the United Kingdom. In addition, in February 2001, CCUK signed an initial agreement with its existing customer BT Cellnet pursuant to which BT Cellnet will lease additional space on CCUK sites throughout the United Kingdom with a minimum take up of 1,500 additional sites by the end of 2003. Our primary business in Australia, which is conducted through Crown Castle Australia Pty Limited, or "CCAL", is the leasing of antenna space to wireless carriers. We currently operate 716 towers in Australia that we purchased from Cable & Wireless Optus during 2000. Further, in April 2001, CCAL purchased 638 wireless communications towers from Vodafone Australia for approximately $113 million (Australian $226 million). Giving effect to this transaction, CCAL operates approximately 1,350 towers in Australia with a strategic presence in all of Australia's licensed regions including Sydney, Melbourne, Brisbane, Adelaide and Perth. CCAL is owned 66.7% by us and 33.3% by Permanent Nominees (Aust) Ltd on behalf of a group of professional and institutional investors lead by Jump Capital Limited. On April 27, 2001, we purchased 49% of the outstanding capital stock of RAI Way S.p.A., or "RAI Way", for a purchase price of approximately Italian Lire 791.4 billion (approximately $384 million). RAI Way manages over 2,300 broadcast transmission sites across Italy, making it one of Italy's largest tower networks, and provides broadcast coverage to approximately 99% of the Italian population. RAI Way currently has over 700 existing telecom tenants and employs over 750 people. We believe our towers are attractive to a diverse range of wireless communications industries, including personal communications services, cellular, enhanced specialized mobile radio, specialized mobile radio, paging, and fixed microwave, as well as radio and television broadcasting. In the United States our major customers include Verizon, Cingular, Powertel, Nextel, Sprint PCS and AT&T Wireless. In the United Kingdom our major customers include the BBC, BT Cellnet, NTL, ONdigital, One 2 One, Orange, Virgin Radio and Hutchison. Our principal customers in Australia are Cable & Wireless Optus, Vodafone Australia, OneTel and Hutchison Australia. We are continuing our ongoing construction program to enhance our tower portfolios. In 2000, we constructed 1,178 towers. In 2001, we plan to construct approximately 1,500 towers, at an estimated aggregate cost of approximately $330 million, for lease to wireless carriers such as Verizon, Cingular, Nextel, Hutchison and BT Cellnet. The actual number of towers built may vary depending on acquisition opportunities and potential build-to-suit contracts from large wireless carriers. Our principal executive offices are located at 510 Bering Drive, Suite 500, Houston, Texas, 77057, and our telephone number is (713) 570-3000. Recent Developments On May 16, 2001, we closed the private placement of the old notes. 2

The Offering Summary of Terms of the Exchange Offer Background..................... On May 16, 2001, we completed a private placement of the old notes. In connection with that private placement, we entered into a registration rights agreement in which we agreed, among other things, to deliver this prospectus to you and to complete an exchange offer. The Exchange Offer............. We are offering to exchange our new notes which have been registered under the Securities Act of 1933 for a like principal amount of our outstanding, unregistered old notes. Old notes may only be tendered in integral multiples of $1,000 principal amount at maturity. As of the date of this prospectus, $450,000,000 in aggregate principal amount of our old notes is outstanding. Resale of New Notes............ We believe that new notes issued pursuant to the exchange offer in exchange for old notes may be offered for resale, resold and otherwise transferred by you without compliance with the registration and prospectus delivery provisions of the Securities Act of 1933, provided that: . you are acquiring the new notes in the ordinary course of your business; . you have not engaged in, do not intend to engage in, and have no arrangement or understanding with any person to participate in the distribution of the new notes; and . you are not our affiliate as defined under Rule 405 of the Securities Act of 1933. Each participating broker-dealer that receives new notes for its own account pursuant to the exchange offer in exchange for old notes that were acquired as a result of market-making or other trading activity must acknowledge that it will deliver a prospectus in connection with any resale of new notes. See "Plan of Distribution". Any holder of old notes who: . is our affiliate; . does not acquire new notes in the ordinary course of its business; . tenders in the exchange offer with the intention to participate, or for the purpose of participating, in a distribution of new notes; or . is a broker-dealer that acquired the old notes directly from us must comply with the registration and prospectus delivery requirements of the Securities Act of 1933 in connection with the resale of new notes. 3

Consequences If You Do Not Exchange Your Old Notes....... Old notes that are not tendered in the exchange offer or are not accepted for exchange will continue to bear legends restricting their transfer. You will not be able to offer or sell the old notes unless: . pursuant to an exemption from the requirements of the Securities Act of 1933; . the old notes are registered under the Securities Act of 1933; or . the transaction requires neither such an exemption nor registration, and after the exchange offer is closed, we will no longer have an obligation to register the old notes, except for some limited exceptions. See "Risk Factors--Failure to Exchange Your Old Notes". Expiration Date................ 5:00 p.m., New York City time, on , 2001, unless we extend the exchange offer. Certain Conditions to the Exchange Offer................ The exchange offer is subject to certain customary conditions, which we may waive. Special Procedures for Beneficial Holders............ If you beneficially own old notes which are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and you wish to tender in the exchange offer, you should contact such registered holder promptly and instruct such person to tender on your behalf. If you wish to tender in the exchange offer on your own behalf, you must, prior to completing and execution the letter of transmittal and delivering your old notes, either arrange to have the old notes registered in your name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time. Withdrawal Rights.............. You may withdraw your tender of old notes at any time before the offer expires. Accounting Treatment........... We will not recognize any gain or loss for accounting purposes upon the completion of the exchange offer. The expenses of the exchange offer that we pay will increase our deferred financing costs in accordance with generally accepted accounting principles. See "The Exchange Offer--Accounting Treatment". Certain Tax Consequences....... The exchange pursuant to the exchange offer generally will not be a taxable event for U.S. Federal income tax purposes. Use of Proceeds................ We will not receive any proceeds from the exchange or the issuance of new notes in connection with the exchange offer. Exchange Agent................. The Bank of New York is serving as exchange agent in connection with the exchange offer. 4

Summary Description of the Securities to be Registered The new notes have the same financial terms and covenants as the old notes, which are as follows: Securities offered............. $450,000,000 million in aggregate principal amount of 9 3/8% Senior Notes due 2011. Maturity....................... August 1, 2011 Issue price.................... 100%, plus accrued interest, if any, from May 16, 2001. Interest....................... Annual rate--9 3/8%. Payment frequency--every six months on February 1 and August 1, beginning on August 1, 2001. Ranking........................ These notes constitute senior debt of the Company, and rank equally in right of payment with all of our existing and future senior debt, but will be effectively junior in right of payment to the extent of the assets securing our other senior debt. Our only significant assets are the capital stock of our subsidiaries, and the notes will not be guaranteed by our subsidiaries. As a result, the notes will be structurally subordinated to all debt and other liabilities of our subsidiaries, including borrowings under their credit facilities. Optional redemption............ On or after August 1, 2006, we may redeem some or all of the notes at any time at the redemption price listed in the "Description of Notes" section under the heading "Optional Redemption." Before August 1, 2004, we may redeem up to 35% of the notes with the proceeds of public offerings of equity or strategic investments in us at the price listed in the "Description of Notes" section under the heading "Optional Redemption." Mandatory offer to repurchase.. If we sell certain assets, or experience specific kinds of changes of control, we must offer to repurchase the notes at the price listed in the "Description of Notes" section under the heading "Repurchase at the Option of Holders." Basic covenants of Indenture... We will issue the notes under an indenture with The Bank of New York. The indenture will, among other things, restrict our ability and the ability of our subsidiaries to: . borrow money; . pay dividends on stock or repurchase stock; . make investments; . use assets as security in other transactions; and . sell assets or merge with or into other companies. For more details, see the "Description of the Notes" section under the heading "Certain Covenants." Risk Factors You should carefully consider all of the information in this prospectus. In particular, you should evaluate the specific risk factors under "Risk Factors" for a discussion of certain risks related to your participation in the exchange offer. 5

Summary Financial and Other Data The summary historical consolidated financial data set forth below for each of the five years in the period ended December 31, 2000, and as of December 31, 1996, 1997, 1998, 1999 and 2000, have been derived from the consolidated financial statements of CCIC, which have been audited by KPMG LLP, independent auditors. The summary historical consolidated financial data set forth below for the three months ended March 31, 2000 and 2001, and as of March 31, 2001, have been derived from the unaudited consolidated financial statements of CCIC, which include all adjustments that CCIC considers necessary for a fair presentation of the financial position and results of operations for those periods. Operating results for the three months ended March 31, 2001 are not necessarily indicative of the results that may be expected for the entire year. The results of operations for the three months ended March 31, 2001 are not comparable to the three months ended March 31, 2000, the results for the year ended December 31, 2000 are not comparable to the year ended December 31, 1999, the results for the year ended December 31, 1999 are not comparable to the year ended December 31, 1998, the results for the year ended December 31, 1998 are not comparable to the year ended December 31, 1997, and the results for the year ended December 31, 1997 are not comparable to the year ended December 31, 1996, in each case as a result of business and asset acquisitions completed in 1997, 1998, 1999 and 2000. Results of operations of these acquired businesses and assets are included in CCIC's consolidated financial statements for the periods after the respective dates of acquisition. The information set forth below should be read in conjunction with the consolidated financial statements and related notes and "Management's Discussion and Analysis of Financial Condition and Results of Operations--Results of Operations" included in CCIC's Annual Report on Form 10-K and Quarterly Report on Form 10-Q. Three Months Years Ended December 31, Ended March 31, ------------------------------------------------- ------------------ 1996 1997 1998 1999 2000 2000 2001 ------- -------- -------- --------- --------- -------- -------- (Dollars in thousands, except per share amounts) Statement of Operations Data: Net revenues: Site rental and broadcast transmission.......... $ 5,615 $ 11,010 $ 75,028 $ 267,894 $ 446,039 $ 93,741 $134,042 Network services and other................. 592 20,395 38,050 77,865 203,126 30,503 78,911 ------- -------- -------- --------- --------- -------- -------- Total net revenues... 6,207 31,405 113,078 345,759 649,165 124,244 212,953 ------- -------- -------- --------- --------- -------- -------- Costs of operations: Site rental and broadcast transmission.......... 1,292 2,213 26,254 114,436 194,424 40,287 57,739 Network services and other................. 8 13,137 21,564 42,312 120,176 15,901 55,456 ------- -------- -------- --------- --------- -------- -------- Total costs of operations.......... 1,300 15,350 47,818 156,748 314,600 56,188 113,195 ------- -------- -------- --------- --------- -------- -------- General and administrative......... 1,678 6,824 23,571 43,823 76,944 14,853 25,895 Corporate development(a)......... 1,324 5,731 4,625 5,403 10,489 2,071 3,453 Restructuring charges... -- -- -- 5,645 -- -- -- Non-cash general and administrative compensation charges(b)............. -- -- 12,758 2,173 3,127 461 1,395 Depreciation and amortization........... 1,242 6,952 37,239 130,106 238,796 45,122 74,091 ------- -------- -------- --------- --------- -------- -------- Operating income (loss)................. 663 (3,452) (12,933) 1,861 5,209 5,549 (5,076) Other income (expense): Equity in earnings (losses) of unconsolidated affiliate............. -- (1,138) 2,055 -- -- -- -- Interest and other income (expense)(c)... 193 1,951 4,220 17,731 33,761 5,704 3,092 Interest expense and amortization of deferred financing costs................. (1,803) (9,254) (29,089) (110,908) (241,294) (41,761) (66,655) ------- -------- -------- --------- --------- -------- -------- Loss before income taxes, minority interests, extraordinary item and cumulative effect of change in accounting principle.............. (947) (11,893) (35,747) (91,316) (202,324) (30,508) (68,639) Provision for income taxes.................. (10) (49) (374) (275) (246) (11) (60) Minority interests...... -- -- (1,654) (2,756) (721) (1,541) 644 ------- -------- -------- --------- --------- -------- -------- Loss before extraordinary item and cumulative effect of change in accounting principle.............. (957) (11,942) (37,775) (94,347) (203,291) (32,060) (68,055) Extraordinary item--loss on early extinguishment of debt................ -- -- -- -- (1,495) (1,495) -- Cumulative effect of change in accounting principle for costs of start-up activities.... -- -- -- (2,414) -- -- -- ------- -------- -------- --------- --------- -------- -------- Net loss................ (957) (11,942) (37,775) (96,761) (204,786) (33,555) (68,055) Dividends on preferred stock.................. -- (2,199) (5,411) (28,881) (59,469) (11,493) (19,505) ------- -------- -------- --------- --------- -------- -------- Net loss after deduction of dividends on preferred stock........ $ (957) $(14,141) $(43,186) $(125,642) $(264,255) $(45,048) $(87,560) ======= ======== ======== ========= ========= ======== ======== 6

Three Months Ended Years Ended December 31, March 31, --------------------------------------------------------- -------------------- 1996 1997 1998 1999 2000 2000 2001 -------- --------- ---------- ----------- ----------- -------- ---------- (Dollars in thousands, except per share amounts) Per common share--basic and diluted: Loss before extraordinary item and cumulative effect of change in accounting principle.......... $ (0.27) $ (2.27) $ (1.02) $ (0.94) $ (1.47) $ (0.27) $ (0.41) Extraordinary item................ -- -- -- -- (0.01) (0.01) -- Cumulative effect of change in accounting principle............. -- -- -- (0.02) -- -- -- -------- --------- ---------- ----------- ----------- -------- ---------- Net loss.......................... $ (0.27) $ (2.27) $ (1.02) $ (0.96) $ (1.48) $ (0.28) $ (0.41) ======== ========= ========== =========== =========== ======== ========== Common shares outstanding--basic and diluted (in thousands)....... 3,503 6,238 42,518 131,466 178,588 158,566 211,195 ======== ========= ========== =========== =========== ======== ========== Other Data: Site data (at period end)(d): Towers owned...................... 155 240 1,344 7,326 12,280 8,497 13,069 Towers managed.................... 7 133 129 13 480 13 240 Rooftop sites managed (revenue producing)....................... 52 80 135 149 158 149 158 -------- --------- ---------- ----------- ----------- -------- ---------- Total sites owned and managed... 214 453 1,608 7,488 12,918 8,659 13,467 ======== ========= ========== =========== =========== ======== ========== EBITDA(e): Site rental....................... $ 3,555 $ 7,682 $ 44,661 $ 139,966 $ 221,237 $ 48,528 $ 67,388 Network services and other........ (326) 1,549 (2,972) 5,222 36,384 4,675 6,475 Corporate development expenses(a)...................... (1,324) (5,731) (4,625) (5,403) (10,489) (2,071) (3,453) -------- --------- ---------- ----------- ----------- -------- ---------- Total EBITDA.................... $ 1,905 $ 3,500 $ 37,064 $ 139,785 $ 247,132 $ 51,132 $ 70,410 ======== ========= ========== =========== =========== ======== ========== Capital expenditures............... $ 890 $ 18,035 $ 138,759 $ 293,801 $ 636,506 $110,427 $ 251,860 Summary cash flow information: Net cash provided by (used for) operating activities............. (530) (624) 44,976 92,608 165,495 36,934 44,889 Net cash used for investing activities....................... (13,916) (111,484) (149,248) (1,509,146) (1,957,687) (399,288) (224,928) Net cash provided by financing activities....................... 21,193 159,843 345,248 1,670,402 1,707,091 324,915 443,706 Ratio of earnings to fixed charges(f)........................ -- -- -- -- -- -- -- Balance Sheet Data (at period end): Cash and cash equivalents.......... $ 7,343 $ 55,078 $ 296,450 $ 549,328 $ 453,833 $ 716,941 Property and equipment, net........ 26,753 81,968 592,594 2,468,101 4,303,037 4,450,622 Total assets....................... 41,226 371,391 1,523,230 3,836,650 6,439,841 6,868,546 Total debt......................... 22,052 156,293 429,710 1,542,343 2,602,687 2,701,175 Redeemable preferred stock(g)...... 15,550 160,749 201,063 422,923 842,718 851,351 Total stockholders' equity (deficit)......................... (210) 41,792 737,562 1,617,747 2,420,862 2,666,757 - -------- (a) Corporate development expenses represent costs incurred in connection with acquisitions and development of new business initiatives. These expenses consist primarily of allocated compensation, benefits and overhead costs that are not directly related to the administration or management of existing towers. For the year ended December 31, 1997, such expenses include (1) nonrecurring cash bonuses of $0.9 million paid to certain executive officers in connection with our initial investment in CCUK and (2) a nonrecurring cash charge of $1.3 million related to our purchase of shares of our common stock from our former chief executive officer in connection with our initial CCUK investment. (b) Represents charges related to the issuance of stock options to certain employees and executives, and the issuance of common stock and stock options in connection with certain acquisitions. (c) Includes a $1.2 million fee received in March 1997 as compensation for leading an investment consortium which provided the equity financing in connection with our initial CCUK investment. (d) Represents our aggregate number of sites as of the end of each period. (e) EBITDA is defined as operating income (loss) plus depreciation and amortization, non-cash general and administrative compensation charges and restructuring charges. EBITDA is presented as additional information because management believes it to be a useful indicator of our ability to meet debt service and capital expenditure requirements. It is not, however, intended as an alternative measure of operating results or cash flow from operations, as determined in accordance with generally accepted accounting principles. Furthermore, our measure of EBITDA may not be comparable to similarly titled measures of other companies. 7

(f) For purposes of computing the ratio of earnings to fixed charges, earnings represent income (loss) before income taxes, minority interests, extraordinary item, cumulative effect of change in accounting principle, fixed charges and equity in earnings (losses) of unconsolidated affiliate. Fixed charges consist of interest expense, the interest component of operating leases and amortization of deferred financing costs. For the years ended December 31, 1996, 1997, 1998, 1999 and 2000, earnings were insufficient to cover fixed charges by $0.9 million, $10.8 million, $37.8 million, $91.3 million and $202.3 million, respectively. For the three months ended March 31, 2000 and 2001, earnings were insufficient to cover fixed charges by $30.5 million and $68.6 million, respectively. (g) The 1996 and 1997 amounts represent (1) the senior convertible preferred stock we privately placed in August 1997 and October 1997, all of which has been converted into shares of common stock, and (2) Series A convertible preferred stock, Series B convertible preferred stock and Series C convertible preferred stock we privately placed in April 1995, July 1996 and February 1997, respectively, all of which has been converted into shares of common stock in connection with the completion of our initial public offering in August 1998. The 1998, 1999, 2000 and 2001 amounts represent (1) our exchangeable preferred stock we privately placed in December 1998, (2) our convertible preferred stock we privately placed in November 1999 and (3) our convertible preferred stock we sold in an underwritten public offering in July 2000. 8

RISK FACTORS You should carefully consider the risks described below, as well as the other information included in this prospectus, when evaluating your investment in the new notes. Failure to Exchange Your Old Notes--If you fail to exchange your old notes, they will continue to be restricted securities and may become less liquid. Old notes which you do not tender or we do not accept will, following the exchange offer, continue to be restricted securities, and you may not offer to sell them except pursuant to an exemption from, or in a transaction not subject to, the Securities Act of 1933 and applicable state securities law. We will issue new notes in exchange for the old notes pursuant to the exchange offer only following the satisfaction of the procedures and conditions set forth in "The Exchange Offer--Procedures for Tendering". Such procedures and conditions include timely receipt by the exchange agent of such old notes and of a property completed and duly executed letter of transmittal. Because we anticipate that most holders of old notes will elect to exchange such old notes, we expect that the liquidity of the market for any old notes remaining after the completion of the exchange offer may be substantially limited. Any old notes tendered and exchanged in the exchange offer will reduce the aggregate principal amount at maturity of the old notes outstanding. Following the exchange offer, if you did not tender your old notes you generally will not have any further registration rights, and such old notes will continue to be subject to certain transfer restrictions. Accordingly, the liquidity of the market for such old notes could be adversely affected. The old notes are currently eligible for sale pursuant to Rule 144A and Regulation S through the Private Offerings, Resale and Trading through Automated Linkages market of the National Association of Securities Dealers, Inc. Failure to Properly Manage Our Growth--If we are unable to successfully integrate acquired operations or manage our existing operations as we grow, our business will be adversely affected, and we may not be able to continue our current business strategy. We cannot guarantee that we will be able to successfully integrate acquired businesses and assets into our business or implement our growth plans without delay. If we fail to do so it could have a material adverse effect on our financial condition and results of operations. We have grown significantly over the past two years through acquisitions, and such growth continues to be an important part of our business plan. The addition of over 11,000 towers to our operations over the past two years has and will continue to increase our current business considerably and adds significant operational complexities. Successful integration of these transactions will depend primarily on our ability to manage these combined operations and to integrate new management and employees with and into our existing operations. Our net loss increased to $68.1 million for the three months ended March 31, 2001 from $33.6 million for the three months ended March 31, 2000, an increase of 103%, as a result of our expanded business operations and the financing thereof, including a 64% increase in depreciation and amortization and a 60% increase in interest expense in the first quarter of 2001 as compared to the first quarter of 2000. We expect that such net losses, at least in the near term, will continue to exceed those of comparable prior-year periods as a result of our growth and the financing thereof. Implementation of our acquisition strategy may impose significant strains on our management, operating systems and financial resources. We regularly evaluate potential acquisition and joint venture opportunities and are currently evaluating potential transactions that could involve substantial expenditures, possibly in the near term. If we fail to manage our growth or encounter unexpected difficulties during expansion, it could have a material adverse effect on our financial condition and results of operations. The pursuit and integration of acquisitions and joint venture opportunities will 9

require substantial attention from our senior management, which will limit the amount of time they are able to devote to our existing operations. Substantial Level of Indebtedness--Our substantial level of indebtedness could adversely affect our ability to react to changes in our business. We may also be limited in our ability to use debt to fund future capital needs. We have a substantial amount of indebtedness. The following chart sets forth certain important credit information and is presented as of March 31, 2001, both on an actual basis as well as on a pro forma basis giving effect to the recent issuance of the old notes. Actual Pro Forma ---------- ---------- (Dollars in thousands) Total indebtedness................................. $2,701,175 $3,151,175 Redeemable preferred stock......................... 851,351 851,351 Stockholders' equity............................... 2,666,757 2,666,757 Debt and redeemable preferred stock to equity ratio............................................. 1.33x 1.50x In addition, our earnings for the year ended December 31, 2000 and for the fiscal quarter ended March 31, 2001 were insufficient to cover fixed charges by $202.3 million and $68.6 million, respectively. After giving effect to the recent issuance of the old notes, our pro forma earnings for the fiscal quarter ended March 31, 2001 would have been insufficient to cover pro forma fixed charges by $79.4 million. As a result of our substantial indebtedness: . we could be more vulnerable to general adverse economic and industry conditions; . we may find it more difficult to obtain additional financing to fund future working capital, capital expenditures and other general corporate requirements; . we will be required to dedicate a substantial portion of our cash flow from operations to the payment of principal and interest on our debt, reducing the available cash flow to fund other projects; . we may have limited flexibility in planning for, or reacting to, changes in our business and in the industry; and . we will have a competitive disadvantage relative to other companies with less debt in our industry. We cannot guarantee that we will be able to generate enough cash flow from operations or that we will be able to obtain enough capital to service our debt, including the new notes, pay our obligations under our convertible preferred stock or fund our planned capital expenditures. In addition, we may need to refinance some or all of our indebtedness, including the new notes, on or before maturity. We cannot guarantee, however, that we will be able to refinance our indebtedness on commercially reasonable terms or at all. As a Holding Company, We Require Dividends from Subsidiaries to Meet Cash Requirements or Pay Dividends--If our subsidiaries are unable to dividend cash to us when we need it, we may be unable to pay dividends or satisfy our obligations, including interest and principal payments, under our debt instruments. CCIC is a holding company with no business operations of its own. CCIC's only significant asset is the outstanding capital stock of its subsidiaries. CCIC conducts all of its business operations through its subsidiaries. Accordingly, CCIC's only source of cash to pay dividends or make other 10

distributions on its capital stock or to pay interest and principal on its outstanding indebtedness is distributions relating to its ownership interest in its subsidiaries from the net earnings and cash flow generated by such subsidiaries. We currently expect that the earnings and cash flow of CCIC's subsidiaries will be retained and used by such subsidiaries in their operations, including the service of their respective debt obligations. Even if we did determine to make a distribution in respect of the capital stock of CCIC's subsidiaries, there can be no assurance that CCIC's subsidiaries will generate sufficient cash flow to pay or distribute such a dividend or funds, or that applicable state law and contractual restrictions, including negative covenants contained in the debt instruments of such subsidiaries, would permit such dividends, distributions or payments. Furthermore, the terms of our credit facilities place restrictions on our principal subsidiaries' ability to pay dividends or to make distributions, and in any event, such dividends or distributions may only be paid if no default has occurred under the applicable instrument. Moreover, CCIC's subsidiaries are permitted under the terms of their existing debt instruments to incur additional indebtedness that may restrict or prohibit the making of distributions, the payment of dividends or the making of loans by such subsidiaries to CCIC. See "--Substantial Level of Indebtedness" and "--Ability to Service Debt". Ability to Service Debt--To service our indebtedness, including the new notes, we will require a significant amount of cash from our subsidiaries. An inability to access our subsidiaries' cash flow may lead to an acceleration of our indebtedness, including the new notes. Currently, the instruments governing our subsidiaries' indebtedness do not allow sufficient funds to be distributed to CCIC to service its indebtedness. If CCIC is unable to refinance its subsidiary debt or renegotiate the terms of such debt, CCIC may not be able to meet its debt service requirements, including interest payments on our notes, in the future. Our 9% senior notes, our 9 1/2% senior notes and our 10 3/4% senior notes require, and the notes that are the subject of this exchange offer will require, annual cash interest payments of approximately $16.2 million, $11.9 million, $53.8 million and $42.2 million, respectively. Prior to November 15, 2002, May 15, 2004 and August 1, 2004, the interest expense on our 10 5/8% discount notes, our 10 3/8% discount notes and our 11 1/4% discount notes, respectively, will be comprised solely of the amortization of original issue discount. Thereafter, the 10 5/8% discount notes, the 10 3/8% discount notes and the 11 1/4% discount notes will require annual cash interest payments of approximately $26.7 million, $51.9 million and $29.3 million, respectively. Prior to December 15, 2003, we do not expect to pay cash dividends on our exchangeable preferred stock or, if issued, cash interest on the exchange debentures. Thereafter, assuming all dividends or interest have been paid-in-kind, our exchangeable preferred stock or, if issued, the exchange debentures will require annual cash dividends or interest payments of approximately $47.8 million. Annual cash interest payments on the CCUK bonds are (Pounds)11.25 million (approximately $16.0 million). In addition, our various credit facilities will require periodic interest payments on amounts borrowed thereunder, which amounts could be substantial. Restrictive Debt Covenants--The terms of our debt instruments limit our ability to take a number of actions that our management might otherwise believe to be in our best interests. In addition, if we fail to comply with our covenants, our debt could be accelerated. Currently we have debt instruments in place that restrict our ability to incur more indebtedness, pay dividends, create liens, sell assets and engage in certain mergers and acquisitions. Our subsidiaries, under their debt instruments, are also required to maintain specific financial ratios. Our ability to comply with the restrictions of these instruments and to satisfy our debt obligations will depend on our future operating performance. If we fail to comply with the debt restrictions, we will be in default under those instruments, which in some cases would cause the maturity of substantially all of our long-term indebtedness to be accelerated. 11

We Require Significant Capital to Fund Our Operations and Make Acquisitions--If we are unable to raise capital in the future, we will be unable to achieve our currently contemplated business strategy and may not be able to fund our operations. We will require substantial capital (1) as we increase the number of towers we own and manage by partnering with wireless carriers, by pursuing opportunities to build new towers, or build-to-suit opportunities, for wireless carriers and by pursuing other tower acquisition opportunities and (2) to acquire existing transmission networks globally as opportunities arise. If we are unable to raise capital when our needs arise, we will be unable to pursue our current business strategy and may not be able to fund our operations. To fund the execution of our business strategy, including the construction of new towers that we have agreed to build, we expect to use the remaining net proceeds of our recent offerings and borrowings available under our credit facilities. We will have additional cash needs to fund our operations and acquisitions in the future. We may also have additional cash needs in the near term if additional tower acquisitions or build-to-suit opportunities arise. Some of the opportunities that we are currently pursuing could require significant additional capital. If we do not otherwise have cash available, or borrowings under our credit facilities have otherwise been utilized, when our cash need arises, we would be forced to seek additional debt or equity financing or to forego the opportunity. In the event we determine to seek additional debt or equity financing, there can be no assurance that any such financing will be available, on commercially acceptable terms or at all, or permitted by the terms of our existing indebtedness. We May Not Be Able to Construct or Acquire New Towers at the Pace and in the Locations that We Desire--If we are unable to do so, we may not be able to satisfy our current agreements to build new towers and we may have difficulty finding tenants to lease space on our new towers. Our growth strategy depends in part on our ability to construct and operate towers in conjunction with expansion by wireless carriers. If we are unable to build new towers when wireless carriers require them, or we are unable to build new towers where we believe the best opportunity to add tenants exists, we could fail to meet our contractual obligations under build-to-suit agreements, and we could lose opportunities to lease space on our towers. We currently have plans to commence construction on approximately 1,500 additional towers during fiscal 2001. Our ability to construct these new towers could be affected by a number of factors beyond our control, including: . zoning and local permitting requirements and national regulatory approvals; . availability of construction equipment and skilled construction personnel; and . bad weather conditions. In addition, as the concern over tower proliferation has grown in recent years, certain communities have placed restrictions on new tower construction or have delayed granting permits required for construction. You should consider that: . the barriers to new construction may prevent us from building towers where we want; . we may not be able to complete the number of towers planned for construction in accordance with the requirements of our customers; and . we cannot guarantee that there will be a significant need for the construction of new towers once the wireless carriers complete their tower networks. 12

All of the above factors could affect both our domestic and international operations. In addition, competition laws could prevent us from acquiring or constructing towers or tower networks in certain geographical areas. Our Business Depends on the Demand for Wireless Communications--We will be adversely affected by any slowdown in the growth of, or reduction in demand for, wireless communications. Demand for our site rentals depends on demand for communication sites from wireless carriers, which, in turn, depends on the demand for wireless services. The demand for our sites depends on many factors which we cannot control, including: . the level of demand for wireless services generally; . the financial condition and access to capital of wireless carriers; . the strategy of carriers relating to owning or leasing communication sites; . changes in telecommunications regulations; and . general economic conditions. A slowdown in the growth of, or reduction in, demand in a particular wireless segment could adversely affect the demand for communication sites. Moreover, wireless carriers often operate with substantial indebtedness, and financial problems for our customers could result in accounts receivable going uncollected, the loss of a customer (and associated lease revenue), or a reduced ability of these customers to finance expansion activities. Finally, advances in technology, such as the development of new satellite and antenna systems, could reduce the need for land-based, or terrestrial, transmission networks. The occurrence of any of these factors could have a material adverse effect on our financial condition and results of operations. Variability in Demand for Network Services May Reduce the Predictability of Our Results--Our network services business has historically experienced significant volatility in demand. As a result, the operating results of our network services business for any particular period may vary significantly and should not be considered as necessarily being indicative of longer-term results. Demand for our network services fluctuates from period to period and within periods. These fluctuations are caused by a number of factors, including: . the timing of customers' capital expenditures; . annual budgetary considerations of customers; . the rate and volume of wireless carriers' tower build-outs; . timing of existing customer contracts; and . general economic conditions. While demand for our network services fluctuates, we must incur certain costs, such as maintaining a staff of network services employees in anticipation of future contracts, even when there may be no current business. Furthermore, as wireless carriers complete their build-outs, the need for the construction of new towers and the demand for our network services could decrease significantly and could result in fluctuations and, possibly, significant declines in our operating performance. We Operate Our Business in an Increasingly Competitive Industry and Many of Our Competitors Have Significantly More Resources--As a result of this competition, we may find 13

it more difficult to achieve favorable lease rates on our towers and we may be forced to pay more for future tower acquisitions. We face competition for site rental customers from various sources, including: . other large independent tower owners; . wireless carriers that own and operate their own towers and lease antenna space to other carriers; . site development companies that acquire antenna space on existing towers for wireless carriers and manage new tower construction; and . traditional local independent tower operators. Wireless carriers that own and operate their own tower portfolios generally are substantially larger and have greater financial resources than we have. Competition for tenants on towers could adversely affect lease rates and service income. In addition, competition for the acquisition of towers is intense, and we expect it to continue to grow. We not only compete against other independent tower owners and operators, but also against wireless carriers, broadcasters and site developers. As competition consolidates, we may be faced with fewer acquisition opportunities, as well as higher acquisition prices. While we regularly explore acquisition opportunities, we cannot guarantee that we will be able to identify suitable towers to acquire in the future. A Substantial Portion of Our Revenues is Dependent Upon Agreements with the BBC, NTL, Verizon, Cingular and Powertel. If we were to lose our contracts with the BBC or our site sharing agreement with NTL, we would likely lose a substantial portion of our revenues. The BBC accounted for approximately 14.8% and 11.0% of our revenues for the twelve- month period ended December 31, 2000 and the fiscal quarter ended March 31, 2001, respectively. Our broadcast business is substantially dependent on our contracts with the BBC. We cannot guarantee that the BBC will renew our contracts or that they will not attempt to negotiate terms that are not as favorable to us as those in place now. If we were to lose these BBC contracts, our business, results of operations and financial condition would be materially adversely affected. The initial term of our analog transmission contract with the BBC will expire on March 31, 2007, and our digital transmission contract with the BBC expires on October 31, 2010. In addition, our digital transmission contract with the BBC may be terminated by the BBC after five years if the BBC's board of governors does not believe that digital television in the United Kingdom has enough viewers. A substantial portion of our U.K. broadcast transmission operations is conducted using sites owned by National Transmission Limited, or NTL, our principal broadcast competitor in the United Kingdom. NTL also utilizes our sites for their broadcast operations. This site sharing arrangement with NTL may be terminated on December 31, 2015, or any 10-year anniversary of that date, with five years' prior notice by either us or NTL, and may be terminated sooner if there is a continuing breach of the agreement. We cannot guarantee that this agreement will not be terminated, which could have a material adverse effect on our business, results of operations and financial condition. In addition, a substantial portion of our revenues are received from a few major wireless carriers, particularly carriers that have transferred their tower assets to us. We cannot guarantee that the lease or management service agreements with such carriers will not be terminated or that these carriers will renew such agreements. 14

Extensive Regulations, Which Could Change at Any Time and with Which We Could Fail to Comply, Regulate Our Business--If we fail to comply with applicable regulations, we could be fined or even lose our right to conduct some of our business. A variety of foreign, federal, state and local regulations apply to our business. Failure to comply with applicable requirements may lead to civil penalties or require us to assume costly indemnification obligations or breach contractual provisions. We cannot guarantee that existing regulatory policies will not adversely affect the timing or cost of new tower construction or that additional regulations will not be adopted which increase delays or result in additional costs. These factors could have a material adverse effect on our financial condition and results of operations. Since we signed our analog transmission contact with the BBC, the BBC has increased its service requirements to include 24-hour broadcasting on our transmission network for the BBC's two national television services and a requirement for us to add a number of additional analog stations and service enhancements to existing analog stations. As of March 31, 2001, the BBC has agreed to increases of approximately (Pounds)4.9 million (approximately $7.3 million) per year in the charges payable by the BBC to us for these service enhancements. These additional charges may require a revision amendment to that part of CCUK's transmission telecommunications license dealing with price regulation of analog broadcasting services to the BBC. We are in discussions with the BBC and OFTEL, the relevant regulatory authority in the United Kingdom, regarding wording which will modify the license regulatory provisions to take into account these agreed additional payments. There can be no assurances that such modification will be achieved as a result of these discussions with OFTEL. If We Fail to Complete Any or All of the Agreed-To Transactions, We Will Not Recognize All of the Benefits of Such Transactions. If one or more of our previously agreed-to transactions is not fully completed or is completed on significantly different terms than those currently contemplated, it could substantially affect the implementation of our business strategy. As a result, our future site rental revenue would be adversely affected. The agreements relating to these agreed-to transactions contain many conditions that must be satisfied before we can consummate such agreed-to transactions. In addition, each of the agreements relating to these agreed-to transactions includes provisions that could result in our purchasing or providing fewer towers pursuant to such agreements. Emissions from Our Antennas May Create Health Risks--We could suffer from future claims if the radio frequency emissions from equipment on our towers is demonstrated to cause negative health effects. The government imposes requirements and other guidelines on our towers relating to radio frequency emissions. The potential connection between radio frequency emissions and certain negative health effects, including some forms of cancer, has been the subject of substantial study by the scientific community in recent years. To date, the results of these studies have been inconclusive. We cannot guarantee that claims relating to radio frequency emissions will not arise in the future. Our International Operations Expose Us to Changes in Foreign Currency Exchange Rates--If we fail to properly match or hedge the currencies in which we conduct business, we could suffer losses as a result of changes in currency exchange rates. We conduct business in countries outside the United States, which exposes us to fluctuations in foreign currency exchange rates. We also intend to expand our international operations in the future. For the fiscal quarter ended March 31, 2001, approximately 29.2% of our consolidated revenues originated outside the United States, all of which were denominated in currencies other than U.S. dollars, principally pounds sterling and Australian dollars. We have not historically engaged in 15

significant hedging activities relating to our non-U.S. dollar operations, and we could suffer future losses as a result of changes in currency exchange rates. We Are Heavily Dependent on Our Senior Management--If we lose members of our senior management, we may not be able to find appropriate replacements on a timely basis and our business could be adversely affected. Our existing operations and continued future development depend to a significant extent upon the performance and active participation of certain key individuals as employees, including our chief executive officer and our president. We cannot guarantee that we will be successful in retaining the services of these or other key personnel. None of our executives have signed noncompetition agreements. If we were to lose any of these individuals, we may not be able to find appropriate replacements on a timely basis and our financial condition and results of operations could be materially adversely affected. The New Notes Are Subject to the Risk of Fraudulent Conveyance Liability-- Federal and state statutes allow courts, under specific circumstances, to void the new notes and require noteholders to return payments received from us. Various laws enacted for the protection of creditors may apply to our incurrence of indebtedness, including the issuance of the new notes in this exchange offer. If these laws are held by a court to apply to the new notes, you could be required to return payments you receive on the new notes, and the new notes could be voided. If a court were to find in a lawsuit by an unpaid creditor or representative of creditors that we did not receive fair consideration or reasonably equivalent value for incurring such indebtedness or obligation and, at the time of such incurrence, we . were insolvent; . were rendered insolvent by reason of such incurrence; . were engaged in a business or transaction for which our remaining assets constituted unreasonably small capital; or . intended to incur or believe we would incur obligations beyond our ability to pay such obligations as they mature, such court could, subject to statutes of limitations, determine to invalidate such indebtedness and obligations as fraudulent conveyances or subordinate such indebtedness and obligations to existing or future creditors. There is Currently No Market for the New Notes--If an active trading market for the new notes does not develop, the liquidity and value of the new notes could be harmed. The new notes are new issues of securities for which there is currently no trading market. We do not intend to apply for listing of the new notes on any securities exchange or to seek approval for quotation through an automated quotation system. Accordingly, there can be no assurance that an active market will develop upon completion of the exchange offer or, if developed, that such market will be sustained or as to the liquidity of any market. This Prospectus Includes Forward-Looking Statements--If our expectations reflected in these forward-looking statements prove to be incorrect, our actual results could differ materially from these expectations. This prospectus includes "forward-looking statements" within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. All statements other than statements of 16

historical facts included in this document, including, without limitation, the statements under "Summary" and located elsewhere or incorporated in this prospectus regarding industry prospects, our prospects and our financial position are forward-looking statements. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will prove to have been correct. Important factors that could cause actual results to differ materially from our expectations are disclosed in this document. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements included in this prospectus. In light of these risks, uncertainties and assumptions, the forward-looking events discussed in this prospectus might not occur. USE OF PROCEEDS We will not receive any proceeds from the exchange offer. 17

SELECTED FINANCIAL AND OTHER DATA The selected historical consolidated financial data set forth below for each of the five years in the period ended December 31, 2000, and as of December 31, 1996, 1997, 1998, 1999 and 2000, have been derived from the consolidated financial statements of CCIC, which have been audited by KPMG LLP, independent auditors. The selected historical consolidated financial data set forth below for the three months ended March 31, 2000 and 2001, and as of March 31, 2001, have been derived from the unaudited consolidated financial statements of CCIC, which include all adjustments that CCIC considers necessary for a fair presentation of the financial position and results of operations for those periods. Operating results for the three months ended March 31, 2001 are not necessarily indicative of the results that may be expected for the entire year. The results of operations for the three months ended March 31, 2001 are not comparable to the three months ended March 31, 2000, the results for the year ended December 31, 2000 are not comparable to the year ended December 31, 1999, the results for the year ended December 31, 1999 are not comparable to the year ended December 31, 1998, the results for the year ended December 31, 1998 are not comparable to the year ended December 31, 1997, and the results for the year ended December 31, 1997 are not comparable to the year ended December 31, 1996, in each case as a result of business and asset acquisitions completed in 1997, 1998, 1999 and 2000. Results of operations of these acquired businesses and assets are included in CCIC's consolidated financial statements for the periods after the respective dates of acquisition. The information set forth below should be read in conjunction with the consolidated financial statements and related notes and "Management's Discussion and Analysis of Financial Condition and Results of Operations--Results of Operations" included in CCIC's Annual Report on Form 10-K and Quarterly Report on Form 10-Q. Three Months Years Ended December 31, Ended March 31, ------------------------------------------------- ------------------ 1996 1997 1998 1999 2000 2000 2001 ------- -------- -------- --------- --------- -------- -------- (Dollars in thousands, except per share amounts) Statement of Operations Data: Net revenues: Site rental and broadcast transmission.......... $ 5,615 $ 11,010 $ 75,028 $ 267,894 $ 446,039 $ 93,741 $134,042 Network services and other................. 592 20,395 38,050 77,865 203,126 30,503 78,911 ------- -------- -------- --------- --------- -------- -------- Total net revenues..... 6,207 31,405 113,078 345,759 649,165 124,244 212,953 ------- -------- -------- --------- --------- -------- -------- Costs of operations: Site rental and broadcast transmission.......... 1,292 2,213 26,254 114,436 194,424 40,287 57,739 Network services and other................. 8 13,137 21,564 42,312 120,176 15,901 55,456 ------- -------- -------- --------- --------- -------- -------- Total costs of operations............ 1,300 15,350 47,818 156,748 314,600 56,188 113,195 ------- -------- -------- --------- --------- -------- -------- General and administrative......... 1,678 6,824 23,571 43,823 76,944 14,853 25,895 Corporate development(a)......... 1,324 5,731 4,625 5,403 10,489 2,071 3,453 Restructuring charges... -- -- -- 5,645 -- -- -- Non-cash general and administrative compensation charges(b) ....................... -- -- 12,758 2,173 3,127 461 1,395 Depreciation and amortization........... 1,242 6,952 37,239 130,106 238,796 45,122 74,091 ------- -------- -------- --------- --------- -------- -------- Operating income (loss)................. 663 (3,452) (12,933) 1,861 5,209 5,549 (5,076) Other income (expense): Equity in earnings (losses) of unconsolidated affiliate............. -- (1,138) 2,055 -- -- -- -- Interest and other income (expense)(c)... 193 1,951 4,220 17,731 33,761 5,704 3,092 Interest expense and amortization of deferred financing costs................. (1,803) (9,254) (29,089) (110,908) (241,294) (41,761) (66,655) ------- -------- -------- --------- --------- -------- -------- Loss before income taxes, minority interests, extraordinary item and cumulative effect of change in accounting principle.............. (947) (11,893) (35,747) (91,316) (202,324) (30,508) (68,639) Provision for income taxes.................. (10) (49) (374) (275) (246) (11) (60) Minority interests...... -- -- (1,654) (2,756) (721) (1,541) 644 ------- -------- -------- --------- --------- -------- -------- Loss before extraordinary item and cumulative effect of change in accounting principle.............. (957) (11,942) (37,775) (94,347) (203,291) (32,060) (68,055) Extraordinary item--loss on early extinguishment of debt................ -- -- -- -- (1,495) (1,495) -- Cumulative effect of change in accounting principle for costs of start-up activities.... -- -- -- (2,414) -- -- -- ------- -------- -------- --------- --------- -------- -------- Net loss................ (957) (11,942) (37,775) (96,761) (204,786) (33,555) (68,055) Dividends on preferred stock.................. -- (2,199) (5,411) (28,881) (59,469) (11,493) (19,505) ------- -------- -------- --------- --------- -------- -------- Net loss after deduction of dividends on preferred stock........ $ (957) $(14,141) $(43,186) $(125,642) $(264,255) $(45,048) $(87,560) ======= ======== ======== ========= ========= ======== ======== 18

Three Months Ended Years Ended December 31, March 31, ---------------------------------------------------- ------------------- 1996 1997 1998 1999 2000 2000 2001 ------- -------- --------- ---------- ---------- -------- --------- (Dollars in thousands, except per share amounts) Per common share--basic and diluted: Loss before extraordinary item and cumulative effect of change in accounting principle............. $ (0.27) $ (2.27) $ (1.02) $ (0.94) $ (1.47) $ (0.27) $ (0.41) Extraordinary item..... -- -- -- -- (0.01) (0.01) -- Cumulative effect of change in accounting principle............. -- -- -- (0.02) -- -- -- ------- -------- --------- ---------- ---------- -------- --------- Net loss............... $ (0.27) $ (2.27) $ (1.02) $ (0.96) $ (1.48) $ (0.28) $ (0.41) ======= ======== ========= ========== ========== ======== ========= Common shares outstanding--basic and diluted (in thousands)............ 3,503 6,238 42,518 131,466 178,588 158,566 211,195 ======= ======== ========= ========== ========== ======== ========= Other Data: Site data (at period end)(d): Towers owned........... 155 240 1,344 7,326 12,280 8,497 13,069 Towers managed......... 7 133 129 13 480 13 240 Rooftop sites managed (revenue producing)... 52 80 135 149 158 149 158 ------- -------- --------- ---------- ---------- -------- --------- Total sites owned and managed............... 214 453 1,608 7,488 12,918 8,659 13,467 ======= ======== ========= ========== ========== ======== ========= EBITDA(e): Site rental............ $ 3,555 $ 7,682 $ 44,661 $ 139,966 $ 221,237 $ 48,528 $ 67,388 Network services and other................. (326) 1,549 (2,972) 5,222 36,384 4,675 6,475 Corporate development expenses(a)........... (1,324) (5,731) (4,625) (5,403) (10,489) (2,071) (3,453) ------- -------- --------- ---------- ---------- -------- --------- Total EBITDA........... $ 1,905 $ 3,500 $ 37,064 $ 139,785 $ 247,132 $ 51,132 $ 70,410 ======= ======== ========= ========== ========== ======== ========= Capital expenditures.... $ 890 $ 18,035 $ 138,759 $ 293,801 $ 636,506 $110,427 $ 251,860 Summary cash flow information: New cash provided by (used for) operating activities............ (530) (624) 44,976 92,608 165,495 36,934 44,889 Net cash used for investing activities.. (13,916) (111,484) (149,248) (1,509,146) (1,957,687) (399,288) (224,928) Net cash provided by financing activities.. 21,193 159,843 345,248 1,670,402 1,707,091 324,915 443,706 Ratio of earnings to fixed charges(f)....... -- -- -- -- -- -- -- Balance Sheet Data (at period end): Cash and cash equivalents............ $ 7,343 $ 55,078 $ 296,450 $ 549,328 $ 453,833 $ 716,941 Property and equipment, net.................... 26,753 81,968 592,594 2,468,101 4,303,037 4,450,622 Total assets............ 41,226 371,391 1,523,230 3,836,650 6,439,841 6,868,546 Total debt.............. 22,052 156,293 429,710 1,542,343 2,602,687 2,701,175 Redeemable preferred stock(g)............... 15,550 160,749 201,063 422,923 842,718 851,351 Total stockholders' equity (deficit)....... (210) 41,792 737,562 1,617,747 2,420,862 2,666,757 - -------- (a) Corporate development expenses represent costs incurred in connection with acquisitions and development of new business initiatives. These expenses consist primarily of allocated compensation, benefits and overhead costs that are not directly related to the administration or management of existing towers. For the year ended December 31, 1997, such expenses include (1) nonrecurring cash bonuses of $0.9 million paid to certain executive officers in connection with our initial investment in CCUK and (2) a nonrecurring cash charge of $1.3 million related to our purchase of shares of our common stock from our former chief executive officer in connection with our initial CCUK investment. (b) Represents charges related to the issuance of stock options to certain employees and executives, and the issuance of common stock and stock options in connection with certain acquisitions. (c) Includes a $1.2 million fee received in March 1997 as compensation for leading an investment consortium which provided the equity financing in connection with our initial CCUK investment. (d) Represents our aggregate number of sites as of the end of each period. (e) EBITDA is defined as operating income (loss) plus depreciation and amortization, non-cash general and administrative compensation charges and restructuring charges. EBITDA is presented as additional information because management believes it to be a useful indicator of our ability to meet debt service and capital expenditure requirements. It is not, however, intended as an alternative measure of operating results or cash flow from operations, as determined in accordance with generally accepted accounting principles. Furthermore, our measure of EBITDA may not be comparable to similarly titled measures of other companies. 19

(f) For purposes of computing the ratio of earnings to fixed charges, earnings represent income (loss) before income taxes, minority interests, extraordinary item, cumulative effect of change in accounting principle, fixed charges and equity in earnings (losses) of unconsolidated affiliate. Fixed charges consist of interest expense, the interest component of operating leases and amortization of deferred financing costs. For the years ended December 31, 1996, 1997, 1998, 1999 and 2000, earnings were insufficient to cover fixed charges by $0.9 million, $10.8 million, $37.8 million, $91.3 million and $202.3 million, respectively. For the three months ended March 31, 2000 and 2001, earnings were insufficient to cover fixed charges by $30.5 million and $68.6 million, respectively. (g) The 1996 and 1997 amounts represent (1) the senior convertible preferred stock we privately placed in August 1997 and October 1997, all of which has been converted into shares of common stock, and (2) Series A convertible preferred stock, Series B convertible preferred stock and Series C convertible preferred stock we privately placed in April 1995, July 1996 and February 1997, respectively, all of which has been converted into shares of common stock in connection with the completion of our initial public offering in August 1998. The 1998, 1999, 2000 and 2001 amounts represent (1) our exchangeable preferred stock we privately placed in December 1998, (2) our convertible preferred stock we privately placed in November 1999 and (3) our convertible preferred stock we sold in an underwritten public offering in July 2000. 20

The selected quarterly historical consolidated financial data for CCIC set forth below have been derived from the consolidated financial statements of CCIC. Three Months Ended -------------------------------------------- March 31 June 30 September 30 December 31 -------- -------- ------------ ----------- (Dollars in thousands, except per share amounts) 1999: Net revenues.................... $ 55,109 $ 77,527 $ 98,927 $114,196 Gross profit(1)................. 29,600 42,795 54,281 62,335 Loss before cumulative effect of change in accounting principle...................... (13,473) (20,850) (27,067) (32,957) Cumulative effect of change in accounting principle........... (2,414) -- -- -- Net loss........................ (15,887) (20,850) (27,067) (32,957) Per common share--basic and diluted: Loss before cumulative effect of change in accounting principle.................... (0.21) (0.22) (0.23) (0.27) Cumulative effect of change in accounting principle......... (0.03) -- -- -- Net Loss...................... (0.24) (0.22) (0.23) (0.27) 2000: Net revenues.................... $124,244 $148,359 $174,589 $201,973 Gross profit(1)................. 68,056 79,789 89,213 97,507 Loss before extraordinary item.. (32,060) (59,230) (52,965) (59,036) Extraordinary item.............. (1,495) -- -- -- Net loss........................ (33,555) (59,230) (52,965) (59,036) Per common share--basic and diluted: Loss before extraordinary item......................... (0.27) (0.43) (0.36) (0.40) Extraordinary item............ (0.01) -- -- -- Net Loss...................... (0.28) (0.43) (0.36) (0.40) 2001: Net revenues.................... $212,953 Gross profit(1)................. 99,758 Net loss........................ (68,055) Loss per common share--basic and diluted:....................... (0.41) - -------- (1)Represents net revenues less costs of operations. 21

THE EXCHANGE OFFER Purpose of the Exchange Offer In connection with the sale of the old notes, we entered into a registration rights agreement with the initial purchasers, under which we agreed to use our best efforts to file and have declared effective an exchange offer registration statement under the Securities Act of 1933. We are making the exchange offer in reliance on the position of the SEC as set forth in certain no-action letters. However, we have not sought our own no- action letter. Based upon these interpretations by the SEC, we believe that a holder of new notes, but not a holder who is our "affiliate" within the meaning of Rule 405 of the Securities Act of 1933, who exchanges old notes for new notes in the exchange offer, generally may offer the new notes for resale, sell the new notes and otherwise transfer the new notes without further registration under the Securities Act of 1933 and without delivery of a prospectus that satisfies the requirements of Section 10 of the Securities Act of 1933. This does not apply, however, to a holder who is our "affiliate" within the meaning of Rule 405 of the Securities Act of 1933. We also believe that a holder may offer, sell or transfer the new notes only if the holder acquires the new notes in the ordinary course of its business and is not participating, does not intend to participate and has no arrangement or understanding with any person to participate in a distribution of the new notes. Any holder of the old notes using the exchange offer to participate in a distribution of new notes cannot rely on the no-action letters referred to above. This includes a broker-dealer that acquired old notes directly from us, but not as a result of market-making activities or other trading activities. Consequently, the holder must comply with the registration and prospectus delivery requirements of the Securities Act of 1933 in the absence of an exemption from such requirements. Each broker-dealer that receives new notes for its own account in exchange for old notes, as a result of market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such new notes. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of new notes received in exchange for old notes where such old notes were acquired by such broker-dealer as a result of market-making activities or other trading activities. The letter of transmittal states that by acknowledging and delivering a prospectus, a broker-dealer will not be considered to admit that it is an "underwriter" within the meaning of the Securities Act of 1933. We have agreed that for a period of 180 days after the expiration date, we will make this prospectus available to broker-dealers for use in connection with any such resale. See "Plan of Distribution". Except as described above, this prospectus may not be used for an offer to resell, resale or other transfer of new notes. The exchange offer is not being made to, nor will we accept tenders for exchange from, holders of old notes in any jurisdiction in which the exchange offer or the acceptance of it would not be in compliance with the securities or blue sky laws of such jurisdiction. Terms of the Exchange Upon the terms and subject to the conditions of the exchange offer, we will accept any and all old notes validly tendered prior to 5:00 p.m., New York time, on the expiration date. The date of acceptance for exchange of the old notes, and completion of the exchange offer, is the exchange date, which will be the first business day following the expiration date (unless extended as described 22

in this document). We will issue, on or promptly after the exchange date, an aggregate principal amount of up to $450,000,000 new notes for a like principal amount of outstanding old notes tendered and accepted in connection with the exchange offer. The new notes issued in connection with the exchange offer will be delivered on the earliest practicable date following the exchange date. Holders may tender some or all of their old notes in connection with the exchange offer, but only in $1,000 increments of principal amount at maturity. The terms of the new notes are identical in all material respects to the terms of the old notes, except that the new notes have been registered under the Securities Act of 1933 and are issued free from any covenant regarding registration, including the payment of additional interest upon a failure to file or have declared effective an exchange offer registration statement or to complete the exchange offer by certain dates. The new notes will evidence the same debt as the old notes and will be issued under the same indenture and entitled to the same benefits under that indenture as the old notes being exchanged. As of the date of this prospectus, $450,000,000 in aggregate principal amount of the old notes is outstanding. In connection with the issuance of the old notes, we arranged for the old notes originally purchased by qualified institutional buyers and those sold in reliance on Regulation S under the Securities Act of 1933 to be issued and transferable in book-entry form through the facilities of The Depository Trust Company, acting as depositary. Except as described under "Description of Notes--Book-Entry, Delivery and Form," the new notes will be issued in the form of a global note registered in the name of DTC or its nominee and each beneficial owner's interest in it will be transferable in book-entry form through DTC. See "Description of Notes--Book-Entry, Delivery and Form". Holders of old notes do not have any appraisal or dissenters' rights in connection with the exchange offer. Old notes which are not tendered for exchange or are tendered but not accepted in connection with the exchange offer will remain outstanding and be entitled to the benefits of the indenture under which they were issued, but will not be entitled to any registration rights under the registration rights agreement. We shall be considered to have accepted validly tendered old notes if and when we have given oral or written notice to the exchange agent. The exchange agent will act as agent for the tendering holders for the purposes of receiving the new notes from us. If any tendered old notes are not accepted for exchange because of an invalid tender, the occurrence of certain other events described in this prospectus or otherwise, we will return the old notes, without expense, to the tendering holder as quickly as possible after the expiration date. Holders who tender old notes will not be required to pay brokerage commissions or fees or, subject to the instructions in the letter of transmittal, transfer taxes on exchange of old notes in connection with the exchange offer. We will pay all charges and expenses, other than certain applicable taxes described below, in connection with the exchange offer. See "--Fees and Expenses". Expiration Date; Extensions; Amendments The expiration date for the exchange offer is 5:00 p.m., New York City time, on , 2001, unless extended by us in our sole discretion (but in no event to a date later than , 2001), in which case the term "expiration date" shall mean the latest date and time to which the exchange offer is extended. We reserve the right, in our sole discretion: . to delay accepting any old notes, to extend the offer or to terminate the exchange offer if, in our reasonable judgment, any of the conditions described below shall not have been 23

satisfied, by giving oral or written notice of the delay, extension or termination to the exchange agent, or . to amend the terms of the exchange offer in any manner. If we amend the exchange offer in a manner that we consider material, we will disclose such amendment by means of a prospectus supplement, and we will extend the exchange offer for a period of five to ten business days. If we determine to make a public announcement of any delay, extension, amendment or termination of the exchange offer, we will do so by making a timely release through an appropriate news agency. Interest on the New Notes Interest on the new notes will accrue at the rate of 9 3/8% per annum from the most recent date to which interest on the new notes has been paid or, if no interest has been paid, from the date of the indenture governing the notes. Interest will be payable semiannually in arrears on February 1 and August 1, commencing on August 1, 2001. Conditions to the Exchange Offer Despite any other term of the exchange offer, we will not be required to accept for exchange, or exchange new notes for, any old notes and may terminate the exchange offer as provided in this prospectus before the acceptance of the old notes, if: . any action or proceeding is instituted or threatened in any court or by or before any governmental agency relating to the exchange offer which, in our reasonable judgment, might materially impair our ability to proceed with the exchange offer or materially impair the contemplated benefits of the exchange offer to us, or any material adverse development has occurred in any existing action or proceeding relating to us or any of our subsidiaries; . any change, or any development involving a prospectus change, in our business or financial affairs or any of our subsidiaries has occurred which, in our reasonable judgment, might materially impair our ability to proceed with the exchange offer or materially impair the contemplated benefits of the exchange offer to us; . any law, statue, rule or regulation is proposed, adopted or enacted, which in our reasonable judgment, might materially impair our ability to proceed with the exchange offer or materially impair the contemplated benefits of the exchange offer to us; or . any governmental approval has not been obtained, which approval we, in our reasonable discretion, consider necessary for the completion of the exchange offer as contemplated by this prospectus. The conditions listed above are for our sole benefit and may be asserted by us regardless of the circumstances giving rise to any of these conditions. We may waive these conditions in our reasonable discretion in whole or in part at any time and from time to time. The failure by us at any time to exercise any of the above rights shall not be considered a waiver of such right, and such right shall be considered on ongoing right which may be asserted at any time and from time to time. If we determine in our reasonable discretion that any of the conditions are not satisfied, we may: . refuse to accept any old notes and return all tendered old notes to the tendering holders; 24

. extend the exchange offer and retain all old notes tendered before the expiration of the exchange offer, subject, however, to the rights of holders to withdraw these old notes (See "--Withdrawal of Tenders" below); or . waive unsatisfied conditions relating to the exchange offer and accept all properly tendered old notes which have not been withdrawn. Procedures for Tendering Unless the tender is being make in book-entry form, to tender in the exchange offer, a holder must . complete, sign and date the letter of transmittal, or a facsimile of it, . have the signatures guaranteed if required by the letter of transmittal, and . mail or otherwise deliver the letter of transmittal or the facsimile, the old notes and any other required documents to the exchange agent prior to 5:00 p.m., New York City time, on the expiration date. Any financial institution that is a participant in DTC's Book-Entry Transfer Facility system may make book-entry delivery of the old notes by causing DTC to transfer the old notes into the exchange agent's account. Although delivery of old notes may be effected through book-entry transfer into the exchange agent's account at DTC, the letter of transmittal (or facsimile), with any required signature guarantees and any other required documents, must, in any case, be transmitted to and received or confirmed by the exchange agent at its addresses set forth under the caption "exchange agent" below, prior to 5:00 p.m., New York City time, on the expiration date. Delivery of documents to DTC in accordance with its procedures does not constitute delivery to the exchange agent. The tender by a holder of old notes will constitute an agreement between us and the holder in accordance with the terms and subject to the conditions set forth in this prospectus and in the letter of transmittal. The method of delivery of old notes and the letter of transmittal and all other required documents to the exchange agent is at the election and risk of the holders. Instead of delivery by mail, we recommend that holders use an overnight or hand delivery service. In all cases, holders should allow sufficient time to assure delivery to the exchange agent before the expiration date. No letter of transmittal of old notes should be sent to us. Holders may request their respective brokers, dealers, commercial banks, trust companies or nominees to effect the tenders for such holders. Any beneficial owner whose old notes are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and who wishes to tender should contact the registered holder promptly and instruct such registered holder to tender on behalf of the beneficial owner. If the beneficial owner wishes to tender on that owner's own behalf, the owner must, prior to completing and executing the letter of transmittal and delivery of such owner's old notes, either make appropriate arrangements to register ownership of the old notes in the owners's name or obtain a properly completed bond power from the registered holder. The transfer of registered ownership may take considerable time. Signature on a letter of transmittal or a notice of withdrawal must be guaranteed by an eligible guarantor institution within the meaning of Rule 17Ad-15 under the Securities Exchange Act of 1934, unless the old notes tendered pursuant thereto are tendered: . by a registered holder who has not completed the box entitled "Special Payment Instructions" or "Special Delivery Instructions" on the letter of transmittal, or 25

.for the account of an eligible guarantor institution. In the event that signatures on a letter or transmittal or a notice of withdrawal are required to be guaranteed, such guarantee must be by: . a member firm of a registered national securities exchange or of the National Association of Securities Dealers, Inc., . a commercial bank or trust company having an office or correspondent in the United States, or . an "eligible guarantor institution". If the letter of transmittal is signed by a person other than the registered holder of any old notes, the old notes must be endorsed by the registered holder or accompanied by a properly completed bond power, in each case signed or endorsed in blank by the registered holder. If the letter of transmittal or any old notes or bond powers are signed or endorsed by trustees, executors, administrators, guardians, attorney-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing and, unless waived by us, submit evidence satisfactory to us of their authority to act in that capacity with the letter of transmittal. We will determine all questions as to the validity, form, eligibility (including time of receipt) and acceptance and withdrawal of tendered old notes in our sole discretion. We reserve the absolute right to reject any and all old notes not properly tendered or any old notes whose acceptance by us would, in the opinion of our U.S. counsel, be unlawful. We also reserve the right to waive any defects, irregularities or conditions of tender as to any particular old notes either before or after the expiration date. Our interpretation of the terms and conditions of the exchange offer (including the instructions in the letter of transmittal) will be final and binding on all parties. Unless waived, any defects or irregularities in connection with tenders of old notes must be cured within a time period we will determine. Although we intend to request the exchange agent to notify holders of defects or irregularities relating to tenders of old notes, neither we, the exchange agent nor any other person will have any duty or incur any liability for failure to give such notification. Tenders of old notes will not be considered to have been made until such defects or irregularities have been cured or waived. Any old notes received by the exchange agent that are not properly tendered and as to which the defects or irregularities have not been cured or waived will be returned by the exchange agent to the tendering holders, unless otherwise provided in the letter of transmittal, as soon as practicable following the expiration date. In addition, we reserve the right, as set forth above under the caption "Conditions to the Exchange Offer", to terminate the exchange offer. By tendering, each holder represents to us, among other things, that: . the new notes acquired in connection with the exchange offer are being obtained in the ordinary course of business of the person receiving the new notes, whether or not such person is the holder; . neither the holder nor any such other person has an arrangement or understanding with any person to participate in the distribution of such new notes; and . neither the holder nor any such other person is our "affiliate" (as defined in Rule 405 under the Securities Act of 1933). if the holder is a broker-dealer which will receive new notes for its own account in exchange for old notes, it will acknowledge that it acquired such old notes as the result of market-making activities 26

or other trading activities and it will deliver a prospectus in connection with any resale of such new notes. See "Plan of Distribution". Guaranteed Delivery Procedures A holder who wishes to tender its old notes and: . whose old notes are not immediately available; . who cannot deliver the holder's old notes, the letter of transmittal or any other required documents to the exchange agent prior to the expiration date; or . who cannot complete the procedures for book-entry transfer before the expiration date may effect a tender if: . the tender is made through an eligible guarantor institution; . before the expiration date, the exchange agent receives from the eligible guarantor institution: . a properly completed and duly executed notice of guaranteed delivery by facsimile transmission, mail or hand delivery, . the name and address of the holder, . the certificate number(s) of the old notes and the principal amount at maturity of old notes tendered, stating that the tender is being made and guaranteeing that, within three New York Stock Exchange trading days after the expiration date, the letter of transmittal and the certificate(s) representing the old notes (or a confirmation of book-entry transfer), and any other documents required by the letter of transmittal will be deposited by the eligible guarantor institution with the exchange agent; and . the exchange agent receives, within three New York Stock Exchange trading days after the expiration date, a properly completed and executed letter of transmittal or facsimile, as well as the certificate(s) representing all tendered old notes in proper form for transfer or a confirmation of book-entry transfer, and all other documents required by the letter of transmittal. Withdrawal of Tenders Except as otherwise provided herein, tenders of old notes may be withdrawn at any time prior to 5:00 p.m., New York City time, on the expiration date. To withdraw a tender of old notes in connection with the exchange offer, a written facsimile transmission notice of withdrawal must be received by the exchange agent at its address set forth herein prior to 5:00 p.m., New York City time, on the expiration date. Any such notice of withdrawal must: . specify the name of the person who deposited the old notes to be withdrawn, . identify the old notes to be withdrawn (including the certificate number or numbers and principal amount at maturity of such old notes), . be signed by the depositor in the same manner as the original signature on the letter of transmittal by which such old notes were tendered (including any required signature guarantees) or be accompanied by documents or transfer sufficient to have the trustee register the transfer of such old notes into the name of the person withdrawing the tender, and 27

. specify the name in which any such old notes are to be registered, if different from that of the depositor. We will determine all questions as to the validity, form and eligibility (including time of receipt) of such withdrawal notices. Any old notes so withdrawn will be considered not to have been validly tendered for purposes of the exchange offer, and no new notes will be issued unless the old notes withdrawn are validly re-tendered. Any old notes which have been tendered but which are not accepted for exchange or which are withdrawn will be returned to the holder without cost to such holder as soon as practicable after withdrawal, rejection of tender or termination of the exchange offer. Properly withdrawn old notes may be re-tendered by following one of the procedures described above under the caption "Procedures for Tendering" at any time prior to the expiration date. Exchange Agent The Bank of New York has been appointed as exchange agent in connection with the exchange offer. Questions and requests for assistance, requests for additional copies of this prospectus or of the letter of transmittal should be directed to the exchange agent, at its offices at One Wall Street, New York, N.Y. 10286. The exchange agent's telephone number is (212) 495-1784 and facsimile number is (212) 815-5915. Fees and Expenses We will not make any payment to brokers, dealers or others soliciting acceptances of the exchange offer. We will pay certain other expenses to be incurred in connection with the exchange offer, including the fees and expenses of the exchange agent, accounting and certain legal fees. Holders who tender their old notes for exchange will not be obligated to pay transfer taxes. If, however: . new notes are to be delivered to, or issued in the name of, any person other than the registered holder of the old notes tendered, or . if tendered old notes are registered in the name of any person other than the person signing the letter of transmittal, or . if a transfer tax is imposed for any reason other than the exchange of old notes in connection with the exchange offer, then the amount of any such transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence of payment of such taxes or exemption from them is not submitted with the letter of transmittal, the amount of such transfer taxes will be billed directly to the tendering holder. Accounting Treatment The new notes will be recorded at the same carrying value as the old notes as reflected in our accounting records on the date of the exchange. Accordingly, we will not recognize any gain or loss for accounting purposes upon the completion of the exchange offer. The expenses of the exchange offer that we pay will increase our deferred financing costs in accordance with generally accepted accounting principles. Consequences of Failures to Properly Tender Old Notes in the Exchange Issuance of the new notes in exchange for the old notes under the exchange offer will be made only after timely receipt by the exchange agent of such old notes, a properly completed and duly 28

executed letter of transmittal and all other required documents. Therefore, holders of the old notes desiring to tender such old notes in exchange for new notes should allow sufficient time to ensure timely delivery. We are under no duty to give notification of defects or irregularities of tenders of old notes for exchange. Old notes that are not tendered or that are tendered but not accepted by us will, following completion of the exchange offer, continue to be subject to the existing restrictions upon transfer thereof under the Securities Act of 1933, and, upon completion of the exchange offer, certain registered rights under the registration rights agreement will terminate. In the event the exchange offer is completed, we will not be required to register the remaining old notes. Remaining old notes will continue to be subject to the following restrictions on transfer: . the remaining old notes may be resold only if registered pursuant to the Securities Act of 1933, if any exemption from registration is available, or if neither such registration nor such exemption is required by law, and . the remaining old notes will bear a legend restricting transfer in the absence of registration or an exemption. We do not currently anticipate that we will register the remaining old notes under the Securities Act of 1933. To the extent that old notes are tendered and accepted in connection with the exchange offer, any trading market for remaining old notes could be adversely affected. 29

DESCRIPTION OF NOTES General You can find the definitions of certain terms used in the following summary under the subheading "Certain Definitions". In this summary, the word "CCIC" refers only to Crown Castle International Corp. and not to any of its Subsidiaries. The old notes were issued under separate indenture and the new notes will be issued under the same indenture, in each case between CCIC and The Bank of New York, as trustee. The terms of the notes include those stated in the indenture and those made part of that indenture by reference to the Trust Indenture Act of 1939, as amended. The new and old notes will, be identical in all material respects, except that the new notes have been registered under the Securities Act of 1933 and are free of any obligation regarding registration, including the payment of additional interest upon failure to file or have declared effective an exchange offer registration statement or to consummate an exchange offer by certain dates. The following description is a summary of the material provisions of the indenture and the registration rights agreement. It does not restate the indenture or the registration rights agreement in their entirety. We urge you to read the indenture and the registration rights agreement, because they, and not this description, define your rights as Holders of the notes. A copy of the indenture and the registration rights agreement is available as set forth below under "--Additional Information". Brief Description of the Notes The notes: . are general obligations of CCIC; . rank equally with all existing and future senior debt of CCIC; . accrue interest from the date they are issued at a rate of 9 3/8% which is payable semi-annually; and . mature on August 1, 2011. CCIC has covenanted that it will offer to repurchase notes under the circumstances described in the indenture upon: . a Change of Control of CCIC; or . an Asset Sale by CCIC or any of its Restricted Subsidiaries. The indenture also contains the following covenants: . Restricted Payments; . incurrence of Indebtedness and issuance of preferred stock; . Liens; . dividend and other payment restrictions affecting Subsidiaries; . merger, consolidation or sale of assets; . transactions with Affiliates; . sale and leaseback transactions; . limitation on issuances and sales of Capital Stock of Restricted Subsidiaries; 30

. limitation on issuances of Guarantees of Indebtedness; . Business Activities; and . Reports. The operations of CCIC are conducted through its Subsidiaries and, therefore, CCIC depends on the cash flow of its Subsidiaries to meet its obligations, including its obligations under the notes. CCIC's Subsidiaries will not be guarantors of the notes and the notes will be effectively subordinated to all Indebtedness, including all borrowings under our senior credit facility, the Bell Atlantic joint venture credit facility, Crown Castle UK Limited, or "CCUK", credit facility, the (Pounds)125,000,000 9% Guaranteed Bonds Due 2007 issued by Crown Castle UK Finance PLC and other liabilities and commitments, including trade payables and lease obligations, of CCIC's Subsidiaries. Any right of CCIC to receive assets of any of its Subsidiaries upon the liquidation or reorganization of the Subsidiaries, and the consequent right of the Holders of the notes to participate in those assets, will be effectively subordinated to the claims of that Subsidiary's creditors, except to the extent that CCIC is itself recognized as a creditor of such Subsidiary. If CCIC is recognized as a creditor of such Subsidiary, the claims of CCIC would still be subordinate in right of payment to any security in the assets of that Subsidiary and any indebtedness of that Subsidiary senior to that held by CCIC. As of March 31, 2001, after giving pro forma effect to the recent issuance of the old notes, CCIC's Subsidiaries would have had $1,138.8 million of indebtedness outstanding, and would have had $544.0 million, $75.0 million and $63.9 million of unused borrowing availability, respectively, under the 2000 Credit Facility, the Bell Atlantic joint venture credit facility and the CCUK credit facility. The provisions of the Senior Credit Facility, the Bell Atlantic joint venture credit facility, the CCUK credit facility and the CCUK bonds contain substantial restrictions on the ability of those Subsidiaries to dividend or distribute cash flow or assets to CCIC. See "Risk Factors--As a Holding Company, We Require Dividends from Subsidiaries to Meet Cash Requirements or Pay Dividends". As of the date of the indenture, all of CCIC's Subsidiaries will be Restricted Subsidiaries other than: (1) CCUK and its subsidiaries; and (2) Crown Castle Investment Corp. and Crown Castle Investment Corp. II and their subsidiaries, through which CCIC holds, among other things, its interest in the Bell Atlantic joint venture. However, under certain circumstances, CCIC will be able to designate current or future Subsidiaries as Unrestricted Subsidiaries. Unrestricted Subsidiaries will not be subject to many of the restrictive covenants set forth in the indenture. Principal, Maturity and Interest The notes initially will be limited in aggregate principal amount to $450 million and will mature on August 1, 2011. The indenture governing the notes allows CCIC to issue up to $100 million in aggregate principal amount of notes in addition to that initial amount. The issuance of any of those additional notes will be subject to CCIC's ability to incur indebtedness under the covenant "Incurrence of Indebtedness and Issuance of Preferred Stock" and similar restrictions in the instruments governing CCIC's other Indebtedness. Any such additional notes will be treated as part of the same class and series as the notes issued in this exchange offer for purposes of voting under the indenture. CCIC will issue the notes in denominations of $1,000 and integral multiples of $1,000. Interest on the notes will accrue at the rate of 9 3/8% per annum and will be payable in U.S. Dollars semiannually in arrears on February 1 and August 1, commencing on August 1, 2001. CCIC will make each interest payment to Holders of record on the immediately preceding January 15 and July 15. 31

Interest on the notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of the indenture. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months. Methods of Receiving Payments on the Notes If a Holder has given wire transfer instructions to CCIC, CCIC will make all payments of principal, premium if any, and interest and Special Interest, if any, on that Holder's notes in accordance with those instructions. All other payments on the notes will be made at the office or agency of the paying agent and registrar for the notes within the City and State of New York unless CCIC elects to make interest payments by check mailed to the Holders at their address set forth in the register of Holders. Paying Agent and Registrar for the Notes The trustee under the indenture will initially act as the paying agent and registrar for the notes. CCIC may change the paying agent or registrar under the indenture without prior notice to the Holders of the notes, and CCIC or any of its Subsidiaries may act as paying agent or registrar under the indenture. Transfer and Exchange A Holder may transfer or exchange notes in accordance with the indenture. The registrar and the trustee may require a Holder to furnish appropriate endorsements and transfer documents in connection with a transfer of notes. Holders will be required to pay all taxes due on transfer. CCIC is not required to transfer or exchange any notes selected for redemption. Also, CCIC is not required to transfer or exchange any notes for a period of 15 days before a selection of notes to be redeemed. Optional Redemption During the period after the date of original issuance of the old notes until August 1, 2004, CCIC may on any one or more occasions redeem up to 35% of the aggregate principal amount of notes originally issued at a redemption price of 109.375% of the principal amount of the notes to be redeemed on the redemption date with the net cash proceeds of one or more Public Equity Offerings and/or Strategic Equity Investments; provided that: . at least 65% of the aggregate principal amount of notes originally issued remains outstanding immediately after the occurrence of such redemption, excluding notes held by CCIC or any of its Subsidiaries; and . the redemption occurs within 60 days of the date of the closing of the Public Equity Offering or Strategic Equity Investment. Except pursuant to the preceding paragraph, the notes will not be redeemable at CCIC's option prior to August 1, 2006. On or after August 1, 2006, CCIC may redeem all or a part of the notes upon not less than 30 nor more than 60 days' notice, at the redemption prices expressed as percentages of principal amount set forth below plus accrued and unpaid interest if any, on the notes redeemed to the applicable redemption date, subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date, if redeemed during the twelve-month period beginning on August 1, of the years indicated below: Year Percentage ---- ---------- 2006.......................................................... 104.688% 2007.......................................................... 103.125% 2008.......................................................... 101.563% 2009 and thereafter........................................... 100.000% 32

Selection and Notice If less than all of the notes are to be redeemed at any time, the trustee under the indenture will select notes for redemption as follows: (1) if the notes are listed on any national securities exchange, in compliance with the requirements of the principal national securities exchange, if any, on which the notes are listed; or (2) if the notes are not listed on any national securities exchange, on a pro rata basis, by lot or by such method as the trustee shall deem fair and appropriate. No notes of $1,000 of principal amount at maturity or less will be redeemed in part. Notices of redemption will be mailed by first class mail at least 30 but not more than 60 days before the redemption date to each Holder of notes to be redeemed at its registered address. Notices of redemption may not be conditional. If any note is to be redeemed in part only, the notice of redemption that relates to such note shall state the portion of the principal amount of that note to be redeemed. A new note in principal amount equal to the unredeemed portion of the original note presented for redemption will be issued in the name of the Holder thereof upon cancellation of the original note. Notes called for redemption become due on the date fixed for redemption. On and after the redemption date, interest ceases to accrue on notes or portions of them called for redemption. Mandatory Redemption CCIC is not required to make mandatory redemption or sinking fund payments with respect to the notes. Repurchase at the Option of Holders Change of Control If a Change of Control occurs, each Holder of notes will have the right to require CCIC to repurchase all or any part, equal to $1,000 or an integral multiple of $1,000, of such Holder's notes pursuant to the offer described below (the "Change of Control Offer"). The offer price in any Change of Control Offer will be payable in cash and will be 101% of the aggregate principal amount of any notes repurchased plus accrued and unpaid interest on the notes, if any (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), to the date of purchase (the "Change of Control Payment"). Within 30 days following any Change of Control, CCIC will mail a notice to each Holder describing the transaction or transactions that constitute the Change of Control and offering to repurchase notes on the date specified in the notice (the "Change of Control Payment Date"). The Change of Control Payment Date will be no earlier than 30 days and no later than 60 days from the date the notice is mailed, pursuant to the procedures required by the indenture and described in such notice. On the Change of Control Payment Date, CCIC will, to the extent lawful: (1) accept for payment all notes or portions of the notes properly tendered pursuant to the Change of Control Offer; (2) deposit with the paying agent an amount equal to the Change of Control Payment in respect of all notes or portions of notes properly tendered; and (3) deliver or cause to be delivered to the trustee the notes so accepted together with an officers' certificate stating the aggregate principal amount of notes or portions of the notes being purchased by CCIC. 33

The paying agent will promptly mail to each Holder of notes properly tendered the Change of Control Payment for such notes, and the trustee will promptly authenticate and mail, or cause to be transferred by book entry, to each Holder a new note equal in principal amount to any unpurchased portion of the notes surrendered, if any; provided that the new note will be in a principal amount of $1,000 or an integral multiple of $1,000. The Change of Control provisions described above will be applicable whether or not any other provisions of the indenture are applicable. CCIC will comply with the requirements of Section 14(e) of the Exchange Act and any other securities laws or regulations to the extent those laws and regulations are applicable to any Change of Control Offer. If the provisions of any of the applicable securities laws or securities regulations conflict with the provisions of the covenant described above, CCIC will comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the covenant described above by virtue of the compliance. The Change of Control purchase feature is a result of negotiations between CCIC and the initial purchasers of the old notes. Management has no present intention to engage in a transaction involving a Change of Control, although it is possible that CCIC would decide to do so in the future. Subject to the limitations discussed below, CCIC could, in the future, enter into certain transactions, including acquisitions, refinancings or other recapitalizations, that would not constitute a Change of Control under the indenture, but that could increase the amount of Indebtedness outstanding at such time or otherwise affect CCIC's capital structure. Restrictions on the ability of CCIC to incur additional Indebtedness are contained in the covenants described under "-- Certain Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock," "--Certain Covenants--Liens" and "--Certain Covenants--Sale and Leaseback Transactions". Such restrictions can only be waived with the consent of the Holders of a majority in principal amount of the notes then outstanding. Except for the limitations contained in the covenants, however, the indenture will not contain any covenants or provisions that may afford Holders of the notes protection in the event of certain highly leveraged transactions. The credit facilities of CCIC's Subsidiaries limit CCIC's access to the cash flow of those Subsidiaries and will, therefore, restrict CCIC's ability to purchase any notes. Each of these credit facilities also provides that the occurrence of certain change of control events with respect to CCIC constitutes a default under that credit facility. In the event that a Change of Control occurs at a time when CCIC's Subsidiaries are prohibited from making distributions to CCIC to purchase notes, CCIC could cause its Subsidiaries to seek the consent of the lenders under the credit facilities to allow the distributions or could attempt to refinance the borrowings that contain the prohibition. If CCIC does not obtain a consent or repay such borrowings, CCIC will remain prohibited from purchasing notes. In this case, CCIC's failure to purchase tendered notes would constitute an Event of Default under the indenture which would, in turn, constitute a default under the credit facilities. Future indebtedness of CCIC and its Subsidiaries may contain prohibitions on the occurrence of certain events that would constitute a Change of Control or require the indebtedness to be repurchased if a Change of Control occurs. Moreover, the exercise by the Holders of their right to require CCIC to repurchase the notes could cause a default under such indebtedness, even if the Change of Control itself does not, due to the financial effect of such repurchase on CCIC. Finally, CCIC's ability to pay cash to the Holders of notes following the occurrence of a Change of Control may be limited by CCIC's then existing financial resources, including its ability to access the cash flow of its Subsidiaries. See "Risk Factors--As a Holding Company, We Require Dividends from Subsidiaries to Meet Cash Requirements or Pay Dividends". There can be no assurance that sufficient funds will be available when necessary to make any required repurchases. CCIC will not be required to make a Change of Control Offer upon a Change of Control if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in the indenture applicable to a Change of Control Offer 34

made by CCIC and purchases all notes properly tendered and not withdrawn under such Change of Control Offer. The provisions under the indenture relating to CCIC's obligation to make an offer to repurchase the notes as a result of a Change of Control may be waived or modified with the written consent of the Holders of a majority in principal amount of the notes then outstanding. The definition of Change of Control includes a phrase relating to the sale, lease, transfer, conveyance or other disposition of "all or substantially all" of the assets of CCIC and its Restricted Subsidiaries taken as a whole. Although there is a developing body of case law interpreting the phrase "substantially all", there is no precise established definition of the phrase under applicable law. Accordingly, the ability of a Holder of notes to require CCIC to repurchase the notes as a result of a sale, lease, transfer, conveyance or other disposition of less than all of the assets of CCIC and its Subsidiaries taken as a whole to another Person or group may be uncertain. Asset Sales CCIC will not, and will not permit any of its Restricted Subsidiaries to, consummate an Asset Sale unless: (1) CCIC (or the Restricted Subsidiary, as the case may be) receives consideration at the time of the Asset Sale at least equal to the fair market value of the assets or Equity Interests issued or sold or otherwise disposed of; (2) fair market value is determined by CCIC's board of directors and evidenced by a resolution of its board of directors set forth in an officers' certificate delivered to the trustee under the indenture; and (3) except in the case of a Tower Asset Exchange, at least 75% of the consideration received in such Asset Sale by CCIC or such Restricted Subsidiary is in the form of cash or Cash Equivalents. For purposes of this provision, each of the following shall be deemed to be cash: (a) any liabilities, as shown on CCIC's or such Restricted Subsidiary's most recent balance sheet, of CCIC or any Restricted Subsidiary (other than contingent liabilities and liabilities that are by their terms subordinated to the notes or any guarantee of the notes) that are assumed by the transferee of any assets pursuant to a customary novation agreement that releases CCIC or the Restricted Subsidiary from further liability; and (b) any securities, notes or other obligations received by CCIC or any Restricted Subsidiary from the transferee that are converted by CCIC or the Restricted Subsidiary into cash within 20 days of the applicable Asset Sale, to the extent of the cash received in that conversion. Within 365 days after the receipt of any Net Proceeds from an Asset Sale, CCIC or the Restricted Subsidiary may apply those Net Proceeds to: (1) reduce Indebtedness under a Credit Facility; (2) reduce other Indebtedness of any of CCIC's Restricted Subsidiaries; (3) the acquisition of all or substantially all the assets of a Permitted Business; (4) the acquisition of Voting Stock of a Permitted Business from a Person that is not a Subsidiary of CCIC; provided, that, after giving effect to the acquisition, CCIC or its Restricted Subsidiary owns a majority of the Voting Stock of that business; or (5) the making of a capital expenditure or the acquisition of other long-term assets that are used or useful in a Permitted Business. 35

Pending the final application of any Net Proceeds, CCIC may temporarily reduce revolving credit borrowings or otherwise invest the Net Proceeds in any manner that is not prohibited by the indenture. Any Net Proceeds from Asset Sales that are not applied or invested as provided in the preceding paragraph will be deemed to constitute "Excess Proceeds". When the aggregate amount of Excess Proceeds exceeds $10.0 million, CCIC will be required to make an offer to all Holders of notes, and all holders of other senior Indebtedness of CCIC containing provisions similar to those set forth in the indenture relating to the notes with respect to offers to purchase or redeem with the proceeds of sales of assets, to purchase the maximum principal amount of notes and such other senior Indebtedness of CCIC that may be purchased out of the Excess Proceeds (an "Asset Sale Offer"). The offer price in any Asset Sale Offer will be payable in cash and will be 100% of the principal amount of any notes, plus accrued and unpaid interest to the date of purchase. In the case of any other senior Indebtedness, the offer price will be 100% of the principal amount (or accreted value, as applicable) of the Indebtedness plus accrued and unpaid interest thereon, if any, to the date of purchase. Each Asset Sale Offer will be made in accordance with the procedures set forth in the indenture and the other senior Indebtedness of CCIC. If any Excess Proceeds remain after consummation of an Asset Sale Offer, CCIC may use the remaining Excess Proceeds for any purpose not otherwise prohibited by the indenture. If the aggregate principal amount of notes and the other senior indebtedness of CCIC tendered into the Asset Sale Offer exceeds the amount of Excess Proceeds, the trustee will select the notes and such other senior Indebtedness to be purchased on a pro rata basis. Upon completion of the Asset Sale Offer, the amount of Excess Proceeds will be reset at zero. Certain Covenants Restricted Payments CCIC will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly: (1) declare or pay any dividend or make any other payment or distribution on account of CCIC's or any of its Restricted Subsidiaries' Equity Interests (including, without limitation, any payment in connection with any merger or consolidation involving CCIC or any of its Restricted Subsidiaries) or to the direct or indirect holders of CCIC's or any of its Restricted Subsidiaries' Equity Interests in their capacity as such (other than dividends or distributions payable in Equity Interests (other than Disqualified Stock) of CCIC or to CCIC or a Restricted Subsidiary of CCIC); (2) purchase, redeem or otherwise acquire or retire for value (including without limitation, in connection with any merger or consolidation involving CCIC) any Equity Interests of CCIC or any direct or indirect parent of CCIC (other than any such Equity Interests owned by CCIC or any of its Restricted Subsidiaries); (3) make any payment on or with respect to, or purchase, redeem, defease or otherwise acquire or retire for value any Indebtedness that is subordinated to the notes, except a payment of interest or principal at Stated Maturity; or (4) make any Restricted Investment (all such payments and other actions set forth in these clauses (1) through (4) above, including those occurring since the date of the May 1999 Senior Discount Note Indenture, being collectively referred to as "Restricted Payments"), unless, at the time of and after giving effect to such Restricted Payment: (1) no Default has occurred and is continuing or would occur as a consequence of the Restricted Payment; and 36

(2) CCIC would have been permitted to incur at least $1.00 of additional Indebtedness pursuant to the Debt to Adjusted Consolidated Cash Flow Ratio test set forth in the first paragraph of the covenant described below under the caption "--Incurrence of Indebtedness and Issuance of Preferred Stock"; provided that CCIC and its Restricted Subsidiaries will not be required to comply with this clause (2) in order to make any Restricted Investment; and (3) such Restricted Payment, together with the aggregate amount of all other Restricted Payments made by CCIC and its Restricted Subsidiaries after the date of the May 1999 Senior Discount Note Indenture (excluding Restricted Payments permitted by clauses (2), (3) and (4) of the paragraph of exceptions below), is less than the sum, without duplication, of: (a) 100% of the Consolidated Cash Flow of CCIC for the period (taken as one accounting period) from the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed to the end of CCIC's most recently ended fiscal quarter for which internal financial statements are available at the time of such Restricted Payment (or, if the Consolidated Cash Flow for such period is a deficit, less 100% of the deficit), less 1.75 times the Consolidated Interest Expense of CCIC since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed; plus (b) 100% of the aggregate net cash proceeds received by CCIC since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed as a contribution to its common equity capital or from the issue or sale of Equity Interests of CCIC (other than Disqualified Stock and except to the extent such net cash proceeds are used to incur new Indebtedness outstanding pursuant to clause (11) of the second paragraph of the covenant described below under the caption "Incurrence of Indebtedness and Issuance of Preferred Stock") or from the issue or sale of Disqualified Stock or debt securities of CCIC that have been converted into Equity Interests (other than Equity Interests (or Disqualified Stock or convertible debt securities) sold to a Subsidiary of CCIC and other than Disqualified Stock or convertible debt securities that have been converted into Disqualified Stock); plus (c) to the extent that any Restricted Investment that was made after the date of the May 1999 Senior Discount Note Indenture is sold for cash or otherwise liquidated or repaid for cash, the lesser of: (A) the cash return of capital with respect to the Restricted Investment (less the cost of disposition, if any); and (B) the initial amount of the Restricted Investment; plus (d) to the extent that any Unrestricted Subsidiary of CCIC and all of its Subsidiaries are designated as Restricted Subsidiaries after the date of the May 1999 Senior Discount Note Indenture, the lesser of: (A) the fair market value of CCIC's Investments in such Subsidiaries as of the date of such designation; or (B) the sum of: (x) the fair market value of CCIC's Investments in such Subsidiaries as of the date on which such Subsidiaries were originally designated as Unrestricted Subsidiaries; and 37

(y) the amount of any Investments made in such Subsidiaries subsequent to such designation (and treated as Restricted Payments) by CCIC or any Restricted Subsidiary; provided that: (1) in the event the Unrestricted Subsidiaries designated as Restricted Subsidiaries are CCUK and its Subsidiaries, the references in clauses (A) and (B) of this clause (d) to fair market value of CCIC's Investments in such Subsidiaries shall mean the amount by which the fair market value of all such Investments exceeds 34.3% of the fair market value of CCUK and its Subsidiaries as a whole; and (2) in the event the Unrestricted Subsidiaries designated as Restricted Subsidiaries are CCA Investment Corp. and its Subsidiaries, the references in clauses (A) and (B) of this clause (d) to fair market value of CCIC's Investments in such Subsidiaries shall mean the amount by which the fair market value of all such Investments exceeds $250.0 million; plus (e) 50% of any dividends received by CCIC or a Restricted Subsidiary after the date of the May 1999 Senior Discount Note Indenture from an Unrestricted Subsidiary of CCIC, to the extent that such dividends were not otherwise included in Consolidated Net Income of CCIC for such period. The preceding provisions will not prohibit: (1) the payment of any dividend within 60 days after the date of declaration of that dividend, if at said date of declaration such payment would have complied with the provisions of the indenture; (2) the making of any Investment or the redemption, repurchase, retirement, defeasance or other acquisition of any subordinated Indebtedness or Equity Interests of CCIC in exchange for, or out of the net cash proceeds from the sale since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed (other than to a Subsidiary of CCIC) of Equity Interests of CCIC (other than any Disqualified Stock); provided that the net cash proceeds are not used to incur new Indebtedness pursuant to clause (11) of the second paragraph of the covenant described below under the caption "--Incurrence of Indebtedness and Issuance of Preferred Stock"); and provided further that, in each case, the amount of any net cash proceeds that are so utilized will be excluded from clause (3)(b) of the preceding paragraph; (3) the defeasance, redemption, repurchase or other acquisition of subordinated Indebtedness with the net cash proceeds from an incurrence of Permitted Refinancing Indebtedness; (4) the payment of any dividend by a Restricted Subsidiary of CCIC to the Holders of its Equity Interests on a pro rata basis; (5) the repurchase, redemption or other acquisition or retirement for value of any Equity Interests of CCIC or any Restricted Subsidiary of CCIC held by any member of CCIC's (or any of its Restricted Subsidiaries') management pursuant to any management equity subscription agreement or stock option agreement in effect as of the date of the May 1999 Senior Discount Note Indenture; provided that the aggregate price paid for all of the repurchased, redeemed, acquired or retired Equity Interests may not exceed: (a) $500,000 in any twelve-month period; and (b) $5.0 million in the aggregate since the date of the August 1999 Senior Note Indenture; or 38

(6) the payment of scheduled dividends on CCIC's 12 3/4% Senior Exchangeable Preferred Stock due 2010, whether paid in cash or in kind through the issuance of additional shares of such preferred stock, all in accordance with the certificate of designations governing such preferred stock as in effect on the date of the May 1999 Senior Discount Note Indenture. The board of directors of CCIC may designate any Restricted Subsidiary to be an Unrestricted Subsidiary if such designation would not cause a Default. For purposes of making such determination, all outstanding Investments by CCIC and its Restricted Subsidiaries (except to the extent repaid in cash) in the Subsidiary so designated will be deemed to be Restricted Payments at the time of the designation and will reduce the amount available for Restricted Payments under the first paragraph of this covenant. All of those outstanding Investments will be deemed to constitute Investments in an amount equal to the fair market value of the Investments at the time of such designation. Such designation will only be permitted if the Restricted Payment would be permitted at the time and if the Restricted Subsidiary otherwise meets the definition of an Unrestricted Subsidiary. The board of directors of CCIC may designate any Unrestricted Subsidiary to be a Restricted Subsidiary if the designation would not cause a Default. The amount of all Restricted Payments (other than cash) will be the fair market value on the date of the Restricted Payment of the assets or securities proposed to be transferred or issued by CCIC or the applicable Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment. The fair market value of any property, assets or Investments required by this covenant to be valued will be valued by the board of directors of CCIC whose resolution with respect to the determination will be delivered to the trustee. Incurrence of Indebtedness and Issuance of Preferred Stock CCIC will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, issue, assume, guarantee or otherwise become directly or indirectly liable, contingently or otherwise, with respect to (collectively, "incur") any Indebtedness (including Acquired Debt) and CCIC will not issue any Disqualified Stock and will not permit any of its Restricted Subsidiaries to issue any shares of preferred stock; provided that CCIC may incur Indebtedness (including Acquired Debt) or issue shares of Disqualified Stock and CCIC's Restricted Subsidiaries may incur Indebtedness (including Acquired Debt) or issue preferred stock if, in each case, CCIC's Debt to Adjusted Consolidated Cash Flow Ratio at the time of incurrence of the Indebtedness or the issuance of the preferred stock, after giving pro forma effect to such incurrence or issuance as of such date and to the use of proceeds from such incurrence or issuance as if the same had occurred at the beginning of the most recently ended four full fiscal quarter period of CCIC for which internal financial statements are available, would have been no greater than 7.5 to 1. The first paragraph of this covenant will not prohibit the incurrence of any of the following items of Indebtedness or the issuance of any of the following items of Disqualified Stock or preferred stock (collectively, "Permitted Debt"): (1) the incurrence by CCIC or any of its Restricted Subsidiaries of Indebtedness under Credit Facilities since the date of the August 1999 Senior Note Indenture in an aggregate principal amount (with letters of credit being deemed to have a principal amount equal to the maximum potential liability of CCIC and its Restricted Subsidiaries thereunder) at any one time outstanding not to exceed the product of $150,000 times the number of Completed Towers on the date of such incurrence; (2) the incurrence by CCIC and its Restricted Subsidiaries of the Existing Indebtedness; (3) the incurrence by CCIC of the Indebtedness represented by the notes issued on the date of the May 1999 Senior Discount Note Indenture; 39

(4) the issuance by CCIC of additional shares of its 12 3/4% Senior Exchangeable Preferred Stock due 2010 solely for the purpose of paying dividends thereon and the incurrence by CCIC of Indebtedness represented by CCIC's 12 3/4% Senior Subordinated Exchange Debentures due 2010; (5) the incurrence by CCIC or any of its Restricted Subsidiaries of Indebtedness since the date of the August 1999 Senior Note Indenture represented by Capital Lease Obligations, mortgage financings or purchase money obligations, in each case incurred for the purpose of financing all or any part of the purchase price or cost of construction or improvement of property, plant or equipment used in the business of CCIC or such Restricted Subsidiary, in an aggregate principal amount, including all Permitted Refinancing Indebtedness incurred to refund, refinance or replace any other Indebtedness incurred pursuant to this clause (5), not to exceed $10.0 million at any one time outstanding; (6) the incurrence by CCIC or any of its Restricted Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of which are used to extend, refinance, renew, replace, defease or refund Indebtedness of CCIC or any of its Restricted Subsidiaries or Disqualified Stock of CCIC (other than intercompany Indebtedness) that was permitted by the indenture to be incurred under the first paragraph of this covenant or clauses (2), (3), (4), (5) or this clause (6) of this paragraph; (7) the incurrence by CCIC or any of its Restricted Subsidiaries of intercompany Indebtedness between or among CCIC and any of its Restricted Subsidiaries; provided, however, that: (i) if CCIC is the obligor on such Indebtedness, such Indebtedness is expressly subordinated to the prior payment in full in cash of all Obligations with respect to the notes and that: (A) any subsequent issuance or transfer of Equity Interests that results in any such Indebtedness being held by a Person other than CCIC or a Restricted Subsidiary; and (B) any sale or other transfer of any such Indebtedness to a Person that is not either CCIC or a Restricted Subsidiary shall be deemed, in each case, to constitute an incurrence of the Indebtedness by CCIC or the Restricted Subsidiary, as the case may be; (8) the incurrence by CCIC or any of its Restricted Subsidiaries of Hedging Obligations that are incurred for the purpose of fixing or hedging interest rate risk with respect to any floating rate Indebtedness that is permitted by the terms of the indenture to be outstanding or currency exchange risk; (9) the guarantee by CCIC or any of its Restricted Subsidiaries of Indebtedness of CCIC or a Restricted Subsidiary of CCIC that was permitted to be incurred by another provision of the indenture; (10) the incurrence by CCIC or any of its Restricted Subsidiaries of Acquired Debt in connection with the acquisition of assets or a new Subsidiary and the incurrence by CCIC's Restricted Subsidiaries of Indebtedness as a result of the designation of an Unrestricted Subsidiary as a Restricted Subsidiary; provided that, in the case of any such incurrence of Acquired Debt, such Acquired Debt was incurred by the prior owner of such assets or such Restricted Subsidiary prior to such acquisition by CCIC or one of its Restricted Subsidiaries and was not incurred in connection with, or in contemplation of, the acquisition by CCIC or one of its Restricted Subsidiaries; and provided further that, in the case of any incurrence pursuant to this clause (10), as a result of such acquisition by CCIC or one of its Restricted Subsidiaries, 40

CCIC's Debt to Adjusted Consolidated Cash Flow Ratio at the time of incurrence of such Acquired Debt, after giving pro forma effect to such incurrence as if the same had occurred at the beginning of the most recently ended four full fiscal quarter period of CCIC for which internal financial statements are available, would have been less than CCIC's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such incurrence; (11) the incurrence by CCIC or any of its Restricted Subsidiaries of Indebtedness or Disqualified Stock not to exceed, at any one time outstanding, the sum of: (i) 2.0 times the aggregate net cash proceeds; plus (ii) 1.0 times the fair market value of non-cash proceeds (evidenced by a resolution of the board of directors of CCIC set forth in an officers' certificate delivered to the trustee); in each case, from the issuance and sale, other than to a Subsidiary, of Equity Interests (other than Disqualified Stock) of CCIC since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed (less the amount of such proceeds used to make Restricted Payments as provided in clause (3)(b) of the first paragraph or clause (2) of the second paragraph of the covenant described above under the caption "--Restricted Payments"); and (12) the incurrence by CCIC or any of its Restricted Subsidiaries since the date of the August 1999 Senior Note Indenture of additional Indebtedness and/or the issuance by CCIC of Disqualified Stock in an aggregate principal amount, accreted value or liquidation preference, as applicable, at any time outstanding, not to exceed $25.0 million. The indenture provides that: (1) CCIC will not incur any Indebtedness that is contractually subordinated in right of payment to any other Indebtedness of CCIC unless such Indebtedness is also contractually subordinated in right of payment to the notes on substantially identical terms; provided, however, that no Indebtedness of CCIC will be deemed to be contractually subordinated in right of payment to any other Indebtedness of CCIC solely by virtue of being unsecured; and (2) CCIC will not permit any of its Unrestricted Subsidiaries to incur any Indebtedness other than Non-Recourse Debt. For purposes of determining compliance with this covenant, in the event that an item of Indebtedness meets the criteria of more than one of the categories of Permitted Debt described in clauses (1) through (12) above or is entitled to be incurred pursuant to the first paragraph of this covenant, CCIC will, in its sole discretion, classify (or later reclassify in whole or in part) such item of Indebtedness in any manner that complies with this covenant. Accrual of interest, accretion or amortization of original issue discount and the payment of interest in the form of additional Indebtedness will not be deemed to be an incurrence of Indebtedness for purposes of this covenant. Indebtedness under Credit Facilities outstanding on the date of the indenture shall be deemed to have been incurred on such date in reliance on the exception provided by clause (1) of the definition of Permitted Debt. The debt represented by the notes issued on the date of the indenture shall be deemed to have been incurred on such date in reliance on the exception provided by clause (11) of the definition of Permitted Debt. Liens CCIC will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, assume or suffer to exist any Lien securing Indebtedness or trade payables on any 41

asset now owned or hereafter acquired, or any income or profits therefrom or assign or convey any right to receive income therefrom, except Permitted Liens. Dividend and Other Payment Restrictions Affecting Subsidiaries CCIC will not, and will not permit any of its Restricted Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to exist or become effective any encumbrance or restriction on the ability of any Restricted Subsidiary to: (1) pay dividends or make any other distributions to CCIC or any of its Restricted Subsidiaries on its Capital Stock or with respect to any other interest or participation in, or measured by, its profits; (2) pay any indebtedness owed to CCIC or any of its Restricted Subsidiaries; (3) make loans or advances to CCIC or any of its Restricted Subsidiaries; or (4) transfer any of its properties or assets to CCIC or any of its Restricted Subsidiaries. However, the preceding restrictions will not apply to encumbrances or restrictions existing under or by reason of: (1) Existing Indebtedness as in effect on the date of the indenture, and any amendments, modifications, restatements, renewals, increases, supplements, refundings, replacements or refinancings thereof; provided that such amendments, modifications, restatements, renewals, increases, supplements, refundings, replacements or refinancings are no more restrictive, taken as a whole, with respect to such dividend and other payment restrictions than those contained in the applicable series of Existing Indebtedness as in effect on the date of the indenture; (2) Indebtedness of any Restricted Subsidiary under any Credit Facility that is permitted to be incurred pursuant to the covenant under the caption "Incurrence of Indebtedness and Issuance of Preferred Stock"; provided that such Credit Facility and Indebtedness contain only such encumbrances and restrictions on such Restricted Subsidiary's ability to engage in the activities set forth in clauses (1) through (4) of the preceding paragraph as are, at the time such Credit Facility is entered into or amended, modified, restated, renewed, increased, supplemented, refunded, replaced or refinanced, ordinary and customary for a Credit Facility of that type as determined in the good faith judgment of CCIC's board of directors (and evidenced in a board resolution), which determination shall be conclusively binding; (3) encumbrances and restrictions applicable to any Unrestricted Subsidiary, as the same are in effect as of the date on which the Subsidiary becomes a Restricted Subsidiary, and as the same may be amended, modified, restated, renewed, increased, supplemented, refunded, replaced or refinanced; provided that such amendments, modifications, restatements, renewals, increases, supplements, refundings, replacement or refinancings are no more restrictive, taken as a whole, with respect to the dividend and other payment restrictions than those contained in the applicable series of Indebtedness of such Subsidiary as in effect on the date on which such Subsidiary becomes a Restricted Subsidiary; (4) any Indebtedness incurred in compliance with the covenant under the heading "--Incurrence of Indebtedness and Issuance of Preferred Stock" or any agreement pursuant to which such Indebtedness is issued if the encumbrance or restriction applies only in the event of a payment default or default with respect to a financial covenant contained in the Indebtedness or agreement and the encumbrance or restriction is not materially more disadvantageous to the Holders of the notes than is customary in comparable financings (as determined by CCIC) and CCIC determines that any such encumbrance or restriction will not materially affect CCIC's ability to pay interest or principal on the notes; (5) the indenture governing the notes; 42

(6) applicable law; (7) any instrument governing Indebtedness or Capital Stock of a Person acquired by CCIC or any of its Restricted Subsidiaries as in effect at the time that Person is acquired by CCIC (except to the extent the Indebtedness was incurred in connection with or in contemplation of the acquisition), which encumbrance or restriction is not applicable to any Person, or the properties or assets of any Person, other than the Person, or the property or assets of the Person, so acquired, provided that, in the case of Indebtedness, the Indebtedness was permitted by the terms of the indenture to be incurred; (8) customary non-assignment provisions in leases or licenses entered into in the ordinary course of business; (9) purchase money obligations for property acquired in the ordinary course of business of the nature described in clause (5) in the second paragraph of the covenant described above under the caption "Incurrence of Indebtedness and Issuance of Preferred Stock" on the property so acquired; (10) the provisions of agreements governing Indebtedness incurred pursuant to clause (4) of the second paragraph of the covenant described above under the caption "--Incurrence of Indebtedness and Issuance of Preferred Stock"; (11) any agreement for the sale of a Restricted Subsidiary that restricts that Restricted Subsidiary pending its sale; (12) Permitted Refinancing Indebtedness, provided that the restrictions contained in the agreements governing the Permitted Refinancing Indebtedness are no more restrictive, taken as a whole, than those contained in the agreements governing the Indebtedness being refinanced; (13) Liens permitted to be incurred pursuant to the provisions of the covenant described under the caption "Liens" that limit the right of the debtor to transfer the assets subject to such Liens; (14) provisions with respect to the disposition or distribution of assets or property in joint venture agreements and other similar agreements; and (15) restrictions on cash or other deposits or net worth imposed by customers under contracts entered into in the ordinary course of business. Merger, Consolidation or Sale of Assets CCIC may not: (1) consolidate or merge with or into (whether or not CCIC is the surviving corporation); or (2) sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties or assets in one or more related transactions, to another corporation, Person or entity, unless: (a) either: (A) CCIC is the surviving corporation; or (B) the entity or the Person formed by or surviving any such consolidation or merger (if other than CCIC) or to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made is a corporation organized or existing under the laws of the United States, any state thereof or the District of Columbia; 43

(b) the entity or Person formed by or surviving any such consolidation or merger (if other than CCIC) or the entity or Person to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made assumes all the obligations of CCIC under the notes and the indenture pursuant to a supplemental indenture in a form reasonably satisfactory to the trustee; (c) immediately after such transaction no Default exists; and (d) except in the case of: (A) a merger of CCIC with or into a Wholly Owned Restricted Subsidiary of CCIC; and (B) a merger entered into solely for the purpose of reincorporating CCIC in another jurisdiction: (x) in the case of a merger or consolidation in which CCIC is the surviving corporation, CCIC's Debt to Adjusted Consolidated Cash Flow Ratio at the time of the transaction, after giving pro forma effect to the transaction as of such date for balance sheet purposes and as if the transaction had occurred at the beginning of the most recently ended four full fiscal quarter period of CCIC for which internal financial statements are available for income statement purposes, would have been less than CCIC's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such transaction; or (y) in the case of any other such transaction, the Debt to Adjusted Consolidated Cash Flow of the entity or Person formed by or surviving any such consolidation or merger (if other than CCIC), or to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made, at the time of the transaction, after giving pro forma effect to the transaction as of such date for balance sheet purposes and as if such transaction had occurred at the beginning of the most recently ended four full fiscal quarter period of such entity or Person for which internal financial statements are available for income statement purposes, would have been less than CCIC's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such transaction; provided that for purposes of determining the Debt to Adjusted Consolidated Cash Flow Ratio of any entity or Person for purposes of this clause (y) the entity or Person will be substituted for CCIC in the definition of Debt to Adjusted Consolidated Cash Flow Ratio and the defined terms included therein under the caption "--Certain Definitions". Transactions with Affiliates CCIC will not, and will not permit any of its Restricted Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise dispose of any of its properties or assets to, or purchase any property or assets from, or enter into or make or amend any transaction, contract, agreement, understanding, loan, advance or guarantee with, or for the benefit of, any Affiliate (each of the foregoing, an "Affiliate Transaction"), unless: (1) such Affiliate Transaction is on terms that are no less favorable to CCIC or the relevant Restricted Subsidiary than those that would have been obtained in a comparable transaction by CCIC or such Restricted Subsidiary with an unrelated Person; and (2) CCIC delivers to the trustee: 44

(a) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $1.0 million, a resolution of the board of directors of CCIC set forth in an officers' certificate certifying that the Affiliate Transaction complies with clause (1) above and that the Affiliate Transaction has been approved by a majority of the disinterested members of the board of directors of CCIC; and (b) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $10.0 million, an opinion as to the fairness to the Holders of the Affiliate Transaction from a financial point of view issued by an accounting, appraisal or investment banking firm of national standing. Notwithstanding the foregoing, the following items will not be deemed to be Affiliate Transactions: (1) any employment arrangements with any executive officer of CCIC or a Restricted Subsidiary that is entered into by CCIC or any of its Restricted Subsidiaries in the ordinary course of business and consistent with compensation arrangements of similarly situated executive officers at comparable companies engaged in Permitted Businesses; (2) transactions between or among CCIC and/or its Restricted Subsidiaries; (3) payment of directors fees in an aggregate annual amount not to exceed $25,000 per Person; (4) Restricted Payments that are permitted by the provisions of the indenture described above under the caption "--Restricted Payments"; (5) the issuance or sale of Equity Interests (other than Disqualified Stock) of CCIC; and (6) transactions pursuant to the provisions of the governance agreement and the stockholders agreement, as the same were in effect on the date of the indenture. Sale and Leaseback Transactions CCIC will not, and will not permit any of its Restricted Subsidiaries to, enter into any sale and leaseback transaction; provided that CCIC or any of its Restricted Subsidiaries may enter into a sale and leaseback transaction if: (1) CCIC or such Restricted Subsidiary, as applicable, could have: (a) incurred Indebtedness in an amount equal to the Attributable Debt relating to such sale and leaseback transaction pursuant to the Debt to Adjusted Consolidated Cash Flow Ratio test set forth in the first paragraph of the covenant described above under the caption "-- Incurrence of Indebtedness and Issuance of Preferred Stock"; (b) incurred a Lien to secure such Indebtedness pursuant to the covenant described above under the caption "--Liens"; (2) the gross cash proceeds of such sale and leaseback transaction are at least equal to the fair market value (as determined in good faith by the board of directors) of the property that is the subject of the sale and leaseback transaction; and (3) the transfer of assets in the sale and leaseback transaction is permitted by, and CCIC applies the proceeds of such transaction in compliance with, the covenant described above under the caption "-- Repurchase at the Option of Holders--Asset Sales." 45

Limitation on Issuances and Sales of Capital Stock of Restricted Subsidiaries CCIC: (1) will not, and will not permit any of its Restricted Subsidiaries to, transfer, convey, sell, lease or otherwise dispose of any Equity Interests in any Restricted Subsidiary of CCIC to any Person (other than CCIC or a Wholly Owned Restricted Subsidiary of CCIC); and (2) will not permit any of its Restricted Subsidiaries to issue any of its Equity Interests (other than, if necessary, shares of its Capital Stock constituting directors' qualifying shares) to any Person other than to CCIC or a Wholly Owned Restricted Subsidiary of CCIC, unless, in each such case: (a) as a result of such transfer, conveyance, sale, lease or other disposition or issuance such Restricted Subsidiary no longer constitutes a Subsidiary; and (b) the cash Net Proceeds from such transfer, conveyance, sale, lease or other disposition or issuance are applied in accordance with the covenant described above under the caption "--Repurchase at the Option of Holders--Asset Sales." Notwithstanding the foregoing, the issuance or sale of shares of Capital Stock of any Restricted Subsidiary of CCIC will not violate the provisions of the immediately preceding sentence if such shares are issued or sold in connection with: (x) the formation or capitalization of a Restricted Subsidiary, or (y) a single transaction or a series of substantially contemporaneous transactions whereby such Restricted Subsidiary becomes a Restricted Subsidiary of CCIC by reason of the acquisition of securities or assets from another Person. Limitation on Issuances of Guarantees of Indebtedness CCIC will not permit any Restricted Subsidiary, directly or indirectly, to Guarantee or pledge any assets to secure the payment of any other Indebtedness of CCIC unless such Subsidiary simultaneously executes and delivers a supplemental indenture to the indenture governing the notes providing for the Guarantee of the payment of the notes by such Subsidiary, which Guarantee shall be senior to or pari passu with such Subsidiary's Guarantee of or pledge to secure such other Indebtedness. Notwithstanding the foregoing, any Guarantee by a Subsidiary of the notes shall provide by its terms that it shall be automatically and unconditionally released and discharged upon any sale, exchange or transfer, to any Person other than a Subsidiary of CCIC, of all of CCIC's stock in, or all or substantially all the assets of, such Subsidiary, which sale, exchange or transfer is made in compliance with the applicable provisions of the indenture governing the notes. The form of a Guarantee will be attached as an exhibit to the indenture. Business Activities CCIC will not, and will not permit any Subsidiary to, engage in any business other than Permitted Businesses, except to the extent as would not be material to CCIC and its Subsidiaries taken as a whole. Reports Whether or not required by the Commission, so long as any notes are outstanding, CCIC will furnish to the Holders of notes: (1) all quarterly and annual financial information that would be required to be contained in a filing with the Commission on Forms 10-Q and 10-K if CCIC were required to file such Forms, including a "Management's Discussion and Analysis of Financial Condition and Results of 46

Operations" that describes the financial condition and results of operations of CCIC and its consolidated Subsidiaries showing in reasonable detail in the footnotes to the financial statements and in "Management's Discussion and Analysis of Financial Condition and Results of Operations," in each case to the extent not prohibited by the Commission's rules and regulations: (a) the financial condition and results of operations of CCIC and its Restricted Subsidiaries separate from the financial condition and results of operations of the Unrestricted Subsidiaries of CCIC; and (b) the Tower Cash Flow for the most recently completed fiscal quarter and the Adjusted Consolidated Cash Flow for the most recently completed four-quarter period and, with respect to the annual information only, a report thereon by CCIC's certified independent accountants; and (2) all current reports that would be required to be filed with the Commission on Form 8-K if CCIC were required to file such reports, in each case within the time periods specified in the Commission's rules and regulations. In addition, whether or not required by the rules and regulations of the Commission, CCIC will file a copy of all such information and reports with the Commission for public availability within the time periods specified in the Commission's rules and regulations, unless the Commission will not accept such a filing, and make such information available to securities analysts and prospective investors upon request. Events of Default and Remedies Each of the following constitutes an Event of Default under the indenture: (1) default for 30 days in the payment when due of interest on the notes; (2) default in payment when due of the principal of or premium, if any, on the notes; (3) failure by CCIC or any of its Subsidiaries to comply with the provisions described under the caption "--Certain Covenants--Merger, Consolidation or Sale of Assets" or failure by CCIC to consummate a Change of Control Offer or Asset Sale Offer in accordance with the provisions of the indenture applicable to the offers; (4) failure by CCIC or any of its Subsidiaries for 30 days after notice to comply with any of its other agreements in the indenture or the notes; (5) default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by CCIC or any of its Significant Subsidiaries, or the payment of which is guaranteed by CCIC or any of its Significant Subsidiaries, whether such Indebtedness or guarantee now exists, or is created after the date of the indenture, which default: (a) is caused by a failure to pay principal of or premium, if any, or interest on the Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of the default (a "Payment Default"); or (b) results in the acceleration of the Indebtedness prior to its express maturity and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $20.0 million or more; (6) failure by CCIC or any of its Significant Subsidiaries to pay final judgments aggregating in excess of $20.0 million, which judgments are not paid, discharged or stayed for a period of 60 days; or (7) certain events of bankruptcy or insolvency described in the indenture with respect to CCIC or any of its Restricted Subsidiaries. 47

If any Event of Default occurs and is continuing, the trustee under the indenture or the Holders of at least 25% in principal amount at maturity of the then outstanding notes may declare all the notes to be due and payable immediately. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or insolvency, with respect to CCIC, all outstanding notes will become due and payable without further action or notice. Holders of the notes may not enforce the indenture or the notes except as provided in the indenture. Subject to certain limitations, Holders of a majority in principal amount at maturity of the then outstanding notes may direct the trustee under the indenture in its exercise of any trust or power. The Holders of a majority in aggregate principal amount at maturity of the notes then outstanding by notice to the trustee under the indenture may on behalf of the Holders of all notes waive any existing Default or Event of Default and its consequences under the indenture except a continuing Default or Event of Default in the payment of interest on, or the principal of, the notes. The indenture provides that if a Default occurs and is continuing and is known to the trustee, the trustee must mail to each Holder of the notes notice of the Default within 90 days after it occurs. Except in the case of a Default in the payment of principal of or interest on any note, the trustee may withhold notice if and so long as a committee of its trust officers determines that withholding notice is not opposed to the interest of the Holders of the notes. In addition, CCIC is required to deliver to the trustee, within 90 days after the end of each fiscal year, a certificate indicating whether the signers thereof know of any Default that occurred during the previous year. CCIC is also required to deliver to the trustee, promptly after the occurrence thereof, written notice of any event that would constitute a Default, the status thereof and what action CCIC is taking or proposes to take in respect thereof. No Personal Liability of Directors, Officers, Employees and Stockholders No director, officer, employee, incorporator or stockholder of CCIC, as such, shall have any liability for any obligations of CCIC under the notes, the indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of notes by accepting a note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the notes. The waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the Commission that such a waiver is against public policy. Legal Defeasance and Covenant Defeasance CCIC may, at its option and at any time, elect to have all of its obligations discharged with respect to the notes outstanding ("Legal Defeasance") except for: (1) the rights of Holders of outstanding notes to receive payments in respect of the principal of, premium, if any, and interest on the notes when such payments are due from the trust referred to below; (2) CCIC's obligations with respect to the notes concerning issuing temporary notes, registration of notes, mutilated, destroyed, lost or stolen notes and the maintenance of an office or agency for payment and money for security payments held in trust; (3) the rights, powers, trusts, duties and immunities of the trustee, and CCIC's obligations in connection therewith; and (4) the Legal Defeasance provisions of the indenture. In addition, CCIC may, at its option and at any time, elect to have the obligations of CCIC released with respect to certain covenants that are described in the indenture ("Covenant Defeasance") and thereafter any omission to comply with such obligations shall not constitute a Default or Event of Default with respect to the notes. In the event Covenant Defeasance occurs, 48

certain events described under "--Events of Default and Remedies", but not including non-payment and bankruptcy, receivership, rehabilitation and insolvency events with respect to CCIC, will no longer constitute an Event of Default with respect to the notes. In order to exercise either Legal Defeasance or Covenant Defeasance: (1) CCIC must irrevocably deposit with the trustee, in trust, for the benefit of the Holders of the notes, cash in United States Dollars, non- callable Government Securities, or a combination thereof, in such amounts as will be sufficient, in the opinion of a nationally recognized firm of independent public accountants, to pay the principal of, premium, if any, and interest on the outstanding notes on the stated maturity or on the redemption date, as the case may be, and CCIC must specify whether the notes are being defeased to maturity or to a particular redemption date; (2) in the case of Legal Defeasance, CCIC shall have delivered to the trustee under the indenture an opinion of counsel in the United States reasonably acceptable to the trustee confirming that: (A) CCIC has received from, or there has been published by, the Internal Revenue Service a ruling; or (B) since the date of the indenture, there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such opinion of counsel shall confirm that, the Holders of the outstanding notes will not recognize income, gain or loss for federal income tax purposes as a result of such Legal Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Legal Defeasance had not occurred; (3) in the case of Covenant Defeasance, CCIC shall have delivered to the trustee under the indenture an opinion of counsel in the United States reasonably acceptable to the trustee confirming that the Holders of the outstanding notes will not recognize income, gain or loss for federal income tax purposes as a result of such Covenant Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred; (4) no Default or Event of Default shall have occurred and be continuing either: (a) on the date of such deposit, other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit; or (b) insofar as Events of Default from bankruptcy or insolvency events with respect to CCIC are concerned, at any time in the period ending on the 91st day after the date of deposit; (5) such Legal Defeasance or Covenant Defeasance will not result in a breach or violation of, or constitute a default under any material agreement or instrument, other than the indenture, to which CCIC or any of its Restricted Subsidiaries is a party or by which CCIC or any of its Restricted Subsidiaries is bound; (6) CCIC must have delivered to the trustee an opinion of counsel to the effect that after the 91st day following the deposit, the trust funds will not be subject to the effect of any applicable bankruptcy, insolvency, reorganization or similar laws affecting creditors' rights generally; (7) CCIC must deliver to the trustee under the indenture an officers' certificate stating that the deposit was not made by CCIC with the intent of preferring the Holders of the notes over the other creditors of CCIC with the intent of defeating, hindering, delaying or defrauding creditors of CCIC or others; and 49

(8) CCIC must deliver to the trustee under the indenture an officers' certificate and an opinion of counsel, each stating that all conditions precedent provided for relating to the Legal Defeasance or the Covenant Defeasance have been complied with. Amendment, Supplement and Waiver Except as described in the two paragraphs below, the Holders of a majority in principal amount at maturity of the notes outstanding can, with respect to the notes: (1) consent to any amendment or supplement to the indenture or the notes; and (2) waive any existing default under, or the compliance with any provisions of, the indenture or the notes. Consents and waivers obtained in connection with a purchase of, or tender offer or exchange offer for, the notes shall be included for purposes of the previous sentence. Without the consent of each Holder affected, an amendment or waiver with respect to any notes held by a non-consenting Holder may not: (1) reduce the principal amount of notes whose Holders must consent to an amendment, supplement or waiver; (2) reduce the principal of or change the fixed maturity of any note or alter the provisions with respect to the redemption, but not any required repurchase in connection with an Asset Sale Offer or Change of Control Offer, of the notes; (3) reduce the rate of or change the time for payment of interest on any note; (4) waive a Default or Event of Default in the payment of principal of or premium, if any, or interest on the notes, excluding a rescission of acceleration of the notes by the Holders of at least a majority in aggregate principal amount of the notes and a waiver of the payment default that resulted from such acceleration; (5) make any note payable in money other than that stated in the notes; (6) make any change in the provisions of the indenture relating to waivers of past Defaults or the rights of Holders of notes to receive payments of principal of or premium, if any, or interest on the notes; (7) waive a redemption payment, but not any payment upon a required repurchase in connection with an Asset Sale Offer or Change of Control Offer, with respect to any note; (8) except as provided under the caption "--Legal Defeasance and Covenant Defeasance" or in accordance with the terms of any Subsidiary Guarantee, release a Subsidiary Guarantor from its obligations under its Subsidiary Guarantee or make any change in a Subsidiary Guarantee that would adversely affect the Holders of the notes; or (9) make any change in the foregoing amendment and waiver provisions. Notwithstanding the foregoing, without the consent of any Holder of notes, CCIC and the trustee may amend or supplement the indenture or the notes to: (1) cure any ambiguity, defect or inconsistency; (2) provide for uncertificated notes in addition to or in place of certificated notes; (3) provide for the assumption of CCIC's obligations to Holders of notes in the case of a merger or consolidation; (4) make any change that would provide any additional rights or benefits to the Holders of notes or that does not adversely affect the legal rights under the indenture of any such Holder; or 50

(5) comply with requirements of Commission in order to effect or maintain the qualification of the indenture under the Trust Indenture Act. Concerning the Trustee The indenture contains certain limitations on the rights of the trustee, should it become a creditor of CCIC, to obtain payment of claims in certain cases, or to realize on certain property received in respect of any such claim as security or otherwise. The trustee will be permitted to engage in other transactions; however, if it acquires any conflicting interest it must eliminate such conflict within 90 days, apply to the Commission for permission to continue or resign. The Holders of a majority in principal amount at maturity of the notes then outstanding will have the right to direct the time, method and place of conducting any proceeding for exercising any remedy available to the trustee under the indenture, subject to certain exceptions. The indenture provides that if an Event of Default occurs and is not cured, the trustee will be required, in the exercise of its power, to use the degree of care of a prudent man in the conduct of his own affairs. Subject to these provisions, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request of any Holder of notes, unless that Holder shall have offered to the trustee security and indemnity satisfactory to it against any loss, liability or expense. Additional Information Anyone who receives this prospectus may obtain a copy of the indenture and the registration rights agreement without charge by writing to Crown Castle International Corp., 510 Bering Drive, Suite 500, Houston, Texas 77057, Attention: Corporate Secretary. Book-Entry, Delivery and Form The new notes will be represented by one or more notes in registered, global form without interest coupons (collectively, the "Global notes"). The Global notes will be deposited upon issuance with the trustee as custodian for The Depository Trust Company ("DTC"), in New York, New York, and registered in the name of DTC or its nominee, in each case for credit to an account of a direct or indirect participant in DTC as described below. Except to set forth below, the Global notes may be transferred, in whole and not in part, only to another nominee of DTC or to a successor of DTC or its nominee. Beneficial interests in the Global notes may not be exchanged for notes in certificated form except in the limited circumstances described below. See "--Exchange of Global Notes for Certificated Notes". Except in the limited circumstances described below, owners of beneficial interests in the Global notes will not be entitled to receive physical delivery of notes in certificated form. Transfers of beneficial interests in the Global notes will be subject to the applicable rules and procedures of DTC and its direct or indirect participants, which may change from time to time. Depository Procedures The following description of the operations and procedures of DTC is provided solely as a matter of convenience. These operations and procedures are solely within the control of DTC and are subject to changed by DTC from time to time. CCIC takes no responsibility for these operations and procedures and urges investors to contact DTC or its participants directly to discuss these matters. DTC has advised CCIC that DTC is a limited-purpose trust company created to hold securities for its participating organizations (collectively, the "Participants") and to facilitate the clearance and settlement of transactions in those securities between Participants through electronic book-entry changes in accounts of its Participants. The Participants include securities brokers and dealers (including the initial purchasers of the old notes (the "Initial Purchasers")), banks, trust companies 51

clearing corporations and certain other organizations. Access to DTC's system is also available to other entities such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a Participant, either directly or indirectly (collectively, the "Indirect Participants"). Persons who are not Participants may beneficially own securities held by or on behalf of DTC only through the Participants or the Indirect Participants. The ownership interests in, and transfers of ownership interests in, each security held by or on behalf of DTC are recorded on the records of the Participants and Indirect Participants. DTC has also advised CCIC that, pursuant to procedures established by it: (1) upon deposit of the Global notes, DTC will credit the accounts of Participants with portions of the principal amount of the Global notes; and (2) ownership of these interests in the Global notes will be shown on, and the transfer of ownership thereof will be effected only through, records maintained by DTC (with respect to the Participants) or by the Participants and the Indirect Participants (with respect to other owners of beneficial interest in the Global notes). Except as described below, owners of an interest in the Global notes will not have notes registered in their names, will not receive physical delivery of notes in certificated form and will not be considered the registered owners or "Holders" thereof under the applicable indenture for any purpose. Payments in respect of the principal of, and interest and premium and Special Interest, if any, on a Global note registered in the name of DTC or its nominee will be payable to DTC in its capacity as the registered Holder under the indenture. Under the terms of the indenture, CCIC and the trustee will treat the Persons in whose names the notes, including the Global notes, are registered as the owners thereof for the purpose of receiving payments and for all other purposes. Consequently, neither CCIC, the trustee nor any agent of CCIC or the trustee has or will have any responsibility or liability for: (1) any aspect of DTC's records or any Participant's or Indirect Participant's records relating to or payments made on account of beneficial ownership interest in the Global notes or for maintaining, supervising or reviewing any of DTC's records or any Participant's or Indirect Participant's records relating to the beneficial ownership interests in the Global notes; or (2) any other matter relating to the actions and practices of DTC or any of its Participants or Indirect Participants. DTC has advised CCIC that its current practice, upon receipt of any payment in respect of securities such as the notes (including principal and interest), is to credit the accounts of the relevant Participants with the payment on the payment date unless DTC has reason to believe it will not receive payment on such payment date. Each relevant Participant is credited with an amount proportionate to its beneficial ownership of an interest in the principal amount of the relevant security as shown on the records of DTC. Payments by the Participants and the Indirect Participants to the beneficial owners of notes will be governed by standing instructions and customary practices and will be the responsibility of the Participants or the Indirect Participants and will not be the responsibility of DTC, the trustee or CCIC. Neither CCIC nor the trustee will be liable for any delay by DTC or any of its Participants in identifying the beneficial owners of the notes, and CCIC and the trustee may conclusively rely on and will be protected in relying on instructions from DTC or its nominee for all purposes. Transfers between Participants in DTC will be effected in accordance with DTC's procedures, and will be settled in same-day funds. 52

DTC has advised CCIC that it will take any action permitted to be taken by a Holder of notes only at the direction of one or more Participants to whose account DTC has credited the interests in the Global notes and only in respect of such portion of the aggregate principal amount of the notes as to which such Participant or Participants has or have given such direction. However, if there is an Event of Default under the notes, DTC reserves the right to exchange the Global notes for legended notes in certificated form, and to distribute such notes to its Participants. Although DTC has agreed to the foregoing procedures to facilitate transfers of interests in the Global notes among participants in DTC, it is under no obligation to perform or to continue to perform such procedures and may discontinue such procedures at any time. Neither CCIC nor the trustee nor any of their respective agents will have any responsibility for the performance by DTC or its participants or indirect participants of its obligations under the rules and procedures governing its operations. Exchange of Global Notes for Certificated Notes A Global note is exchangeable for definitive new notes in registered certificated form ("Certificated notes") if: (1) DTC (a) notifies CCIC that it is unwilling or unable to continue as depositary for the Global notes and CCIC then fails to appoint a successor depositary or (b) has ceased to be a clearing agency registered under the Securities Exchange Act of 1934; (2) CCIC, at its option, notifies the trustee in writing that it elects to cause the issuance of the Certificated notes; or (3) there shall have occurred and be continuing a Default or Event of Default with respect to the notes. In addition, beneficial interests in a Global note may be exchanged for Certificated notes upon prior written notice given to the trustee by or on behalf of DTC in accordance with the indenture. In all cases, Certificated notes delivered in exchange for any Global note or beneficial interests in Global notes will be registered in the names, and issued in any approved denominations, requested by or on behalf of the depositary (in accordance with its customary procedures). Exchange of Certificated Notes for Global Notes New notes in certificated form may not be exchanged for beneficial interests in any Global note unless the transferor first delivers to the trustee a written certificate (in the form provided in the indenture) to the effect that such transfer will comply with the appropriate transfer restrictions applicable to such new notes. Same Day Settlement and Payment CCIC will make payments in respect of the notes represented by the Global notes (including principal, premium, if any, interest and Special Interest, if any) by wire transfer of immediately available funds to the accounts specified by the Global note Holder. CCIC will make all payments of principal, interest and premium and Special Interest, if any, with respect to Certificated notes by wire transfer of immediately available funds to the accounts specified by the Holders thereof or, if no such account is specified, by mailing a check to each such Holder's registered address. The notes represented by the Global notes are expected to trade in DTC's Same-day Funds Settlement System, and any permitted secondary market trading activity in such notes will, therefore, be required by DTC to be settled in immediately available funds. CCIC expects that secondary trading in any Certificated notes will also be settled in immediately available funds. 53

Registration Rights; Special Interest Holders of the new notes are not entitled to any registration rights with respect to the new notes. The following description is a summary of the material provisions of the registration rights agreement. It does not restate that agreement in its entirety. We urge you to read the registration rights agreement in its entirety because it, and not this description, defines your registration rights as holders of these notes. See "--Additional Information". CCIC and the Initial Purchasers entered into the registration rights agreement on the closing date of initial purchase of the old notes by the Initial Purchasers. Pursuant to the registration rights agreement, CCIC agreed to file with the Commission the exchange offer registration statement on the appropriate form under the Securities Act with respect to the exchange notes. Upon the effectiveness of the exchange offer registration statement, CCIC will offer to the holders of Registrable Securities pursuant to the exchange offer who are able to make certain representations the opportunity to exchange their Registrable Securities for exchange notes. The registration agreement provides that if: (1) on or prior to the time the exchange offer is completed existing Commission interpretations are changed such that the exchange notes received by Holders in the exchange offer for Registrable Securities are not or would not be, upon receipt, transferable by each such holder without restriction under the Securities Act; (2) the exchange offer has not been completed within 225 days following the closing date; or (3) the exchange offer is not available to any holder of the old notes; CCIC will file with the Commission a shelf registration statement to cover resales of the old notes by the holders thereof who satisfy certain conditions relating to the provision of information in connection with the shelf registration statement. CCIC will use all commercially reasonable efforts to cause the applicable registration statement to be declared effective by the Commission within the periods specified in the registration rights agreement. For purposes of the preceding, "Registrable Securities" means each old note until: (1) the old note has been exchanged for a new note in an exchange offer; (2) a shelf registration statement registering such old note under the Securities Act has been declared or becomes effective and such old note has been sold or otherwise transferred by the holder thereof in accordance with the shelf registration statement; (3) such old note is distributed to the public pursuant to Rule 144 under circumstances in which any legend borne by such note relating to restrictions on transferability thereof, under the Securities Act, is removed by the Company or pursuant to the applicable Indenture; (4) such old note is eligible to be sold pursuant to Rule 144(k); or (5) such old note shall cease to be outstanding. The registration rights agreement provides: (1) CCIC will file an exchange offer registration statement with the Commission not later than 60 days after the closing of the initial purchase of the old notes by the Initial Purchasers; 54

(2) CCIC will use all commercially reasonable efforts to cause the exchange offer registration statement to be declared effective by the Commission not later than 180 days after the closing of the initial purchase of the old notes by the Initial Purchaser; (3) unless the exchange offer would not be permitted by applicable law or Commission policy, CCIC will: (a) use its best efforts to commence the exchange offer not later than 30 business days after the date on which the exchange offer registration statement was declared effective; and (b) issue on or prior to 20 business days, or longer, if required by the federal securities laws, after the commencement of the exchange offer, new notes in exchange for all notes tendered prior thereto in the exchange offer; and (4) If obligated to file the shelf registration statement, CCIC will file the shelf registration statement with the Commission on or prior to 45 days after such filing obligation arises and will use all commercially reasonable efforts to cause the shelf registration statement to be declared effective by the Commission on or prior to 90 days after the filing of the shelf registration statement. If: (1) CCIC fails to file any of the registration statements required by the registration rights agreement on or before the date specified for such filing; or (2) any of such registration statements is not declared effective by the Commission on or prior to the date specified for such effectiveness; or (3) CCIC fails to consummate the exchange offer within 30 business days of the effective date of any such registration statement with respect to the exchange offer registration statement; or (4) the shelf registration statement or the exchange offer registration statement is declared effective but thereafter ceases to be effective or usable in connection with resales of Registrable Securities during the periods specified in the registration rights agreement (each such event referred to in clauses (1) through (4) above, a "Registration Default"), then CCIC will pay special interest ("Special Interest") to each Holder of notes with respect to the first 90-day period immediately following the occurrence of the first Registration Default in an amount equal to $.05 per week per $1,000 principal amount of notes held by such Holder. The amount of the Special Interest will increase by an additional $.05 per week per $1,000 principal amount of notes with respect to each subsequent 90- day period until all Registration Defaults have been cured, up to a maximum amount of Special Interest for all Registration Defaults of $.50 per week per $1,000 principal amount of notes. All accrued Special Interest will be paid by CCIC on each Special Interest payment date to the Global note Holder by wire transfer of immediately available funds or by federal funds check and to Holders of Certified notes by wire transfer to the accounts specified by them or by mailing checks to their registered addresses if no such accounts have been specified. Following the cure of all Registration Defaults, the accrual of Special Interest will cease. Holders of the old notes are required to make certain representations to CCIC (as described in the registration rights agreement) in order to participate in the exchange offer and will be required to deliver certain information to be used in connection with the shelf registration statement and to 55

provide comments on the shelf registration statement within the time periods set forth in the registration rights agreement in order to have their Registrable Securities included in the shelf registration statement and benefit from the provisions regarding Special Interest set forth above. By acquiring Registrable Securities, a holder will be deemed to have agreed to indemnify CCIC against certain losses arising out of information furnished by such holder in writing for inclusion in any shelf registration statement. Holders of the old notes will also be required to suspend their use of the prospectus included in the shelf registration statement under certain circumstances upon receipt of written notice to that effect from CCIC. Certain Definitions Set forth below are certain defined terms used in the indenture. Reference is made to the indenture for a full disclosure of all such terms, as well as any other capitalized terms used herein for which no definition is provided. "Acquired Debt" means, with respect to any specified Person: (1) Indebtedness of any other Person existing at the time such other Person is merged with or into or became a Subsidiary of such specified Person, including, without limitation, Indebtedness incurred in connection with, or in contemplation of, such other Person merging with or into or becoming a Subsidiary of such specified Person; and (2) Indebtedness secured by a Lien encumbering any asset acquired by such specified Person. "Adjusted Consolidated Cash Flow" means, as of any date of determination, the sum of: (1) the Consolidated Cash Flow of CCIC for the four most recent full fiscal quarters ending immediately prior to such date for which internal financial statements are available, less CCIC's Tower Cash Flow for such four-quarter period; plus (2) the product of four times CCIC's Tower Cash Flow for the most recent fiscal quarter for which internal financial statements are available. For purposes of making the computation referred to above: (1) acquisitions that have been made by CCIC or any of its Restricted Subsidiaries, including through mergers or consolidations and including any related financing transactions, during the reference period or subsequent to such reference period and on or prior to the calculation date shall be deemed to have occurred on the first day of the reference period and Consolidated Cash Flow for such reference period shall be calculated without giving effect to clause (2) of the proviso set forth in the definition of Consolidated Net Income; (2) the Consolidated Cash Flow attributable to discontinued operations, as determined in accordance with GAAP, and operations or businesses disposed of prior to the calculation date, shall be excluded; and (3) the corporate development expense of CCIC and its Restricted Subsidiaries calculated in a manner consistent with the audited financial statements of CCIC included in this prospectus shall be added to Consolidated Cash Flow to the extent it was included in computing Consolidated Net Income. "Affiliate" of any specified Person means any other Person directly or indirectly controlling or controlled by or under direct or indirect common control with such specified Person. For purposes of this definition, "control" (including, with correlative meanings, the terms "controlling", "controlled by" and "under common control with"), as used with respect to any Person, shall mean the possession, 56

directly or indirectly, of the power to direct or cause the direction of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise; provided that beneficial ownership of 10% or more of the Voting Stock of a Person shall be deemed to be control. "Asset Sale" means: (1) the sale, lease, conveyance or other disposition of any assets or rights (including, without limitation, by way of a sale and leaseback); provided that the sale, lease, conveyance or other disposition of all or substantially all of the assets of CCIC and its Subsidiaries taken as a whole will be governed by the provisions of the indenture described above under the caption "--Repurchase at the Option of Holders--Change of Control" and/or the provisions described above under the caption "-- Repurchase at the Option of Holders--Merger, Consolidation or Sale of Assets" and not by the provisions of the Asset Sale covenant; and (2) the issue or sale by CCIC or any of its Restricted Subsidiaries of Equity Interests of any of CCIC's Subsidiaries (other than directors' qualifying shares or shares required by applicable law to be held by a Person other than CCIC or a Restricted Subsidiary), in the case of either clause (1) or (2), whether in a single transaction or a series of related transactions: (a) that have a fair market value in excess of $1.0 million; or (b) for net proceeds in excess of $1.0 million. Notwithstanding the foregoing, the following items shall not be deemed to be Asset Sales: (1) a transfer of assets by CCIC to a Restricted Subsidiary or by a Restricted Subsidiary to CCIC or to another Restricted Subsidiary; (2) an issuance of Equity Interests by a Subsidiary to CCIC or to another Restricted Subsidiary; (3) a transfer or issuance of Equity Interests of an Unrestricted Subsidiary to an Unrestricted Subsidiary; provided, however, that such transfer or issuance does not result in a decrease in the percentage of ownership of the voting securities of such transferee Unrestricted Subsidiary that are collectively held by CCIC and its Subsidiaries; (4) a Restricted Payment that is permitted by the covenant described above under the caption "--Certain Covenants--Restricted Payments"; (5) grants of leases or licenses in the ordinary course of business; and (6) disposals of Cash Equivalents. "August 1999 Senior Note Indenture" means that certain indenture dated as of August 3, 1999 between the Company and United States Trust Company of New York, as Trustee, governing the Company's 9 1/2% Senior Notes due 2011. "Asset Sale Offer" has the meaning set forth above under the caption "Repurchase at the Option of Holders--Asset Sales." "Attributable Debt" in respect of a sale and leaseback transaction means, at the time of determination, the present value (discounted at the rate of interest implicit in such transaction, determined in accordance with GAAP) of the obligation of the lessee for net rental payments during the remaining term of the lease included in such sale and leaseback transaction (including any period for which such lease has been extended or may, at the option of the lessor, be extended). "Capital Lease Obligation" means, at the time any determination thereof is to be made, the amount of the liability in respect of a capital lease that would at such time be required to be capitalized on a balance sheet in accordance with GAAP. 57

"Capital Stock" means: (1) in the case of a corporation, corporate stock; (2) in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock; (3) in the case of a partnership or limited liability company, partnership or membership interests (whether general or limited); and (4) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person. "Cash Equivalents" means: (1) United States dollars; (2) securities issued or directly and fully guaranteed or insured by the United States government, or any agency or instrumentality thereof (provided that the full faith and credit of the United States is pledged in support thereof) having maturities of not more than six months from the date of acquisition; (3) certificates of deposit and eurodollar time deposits with maturities of six months or less from the date of acquisition, bankers' acceptances with maturities not exceeding six months and overnight bank deposits, in each case with any lender party to the Senior Credit Facility or with any domestic commercial bank having capital and surplus in excess of $500.0 million and a Thompson Bank Watch Rating of "B" or better; (4) repurchase obligations with a term of not more than seven days for underlying securities of the types described in clauses (2) and (3) above entered into with any financial institution meeting the qualifications specified in clause (3) above; (5) commercial paper having the highest rating obtainable from Moody's Investors Service, Inc. or Standard & Poor's Ratings Group and in each case maturing within six months after the date of acquisition; and (6) money market funds at least 95% of the assets of which constitute Cash Equivalents of the kinds described in clauses (1)-(5) of this definition. "Change of Control" means the occurrence of any of the following: (1) the sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or substantially all of the assets of CCIC and its Restricted Subsidiaries, taken as a whole to any "person" (as such term is used in Section 13(d)(3) of the Exchange Act) other than a Principal or a Related Party of a Principal; (2) the adoption of a plan relating to the liquidation or dissolution of CCIC; (3) the consummation of any transaction (including, without limitation, any merger or consolidation) the result of which is that any "person" (as defined above), other than the Principals and their Related Parties, becomes the "beneficial owner" (as such term is defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that a person shall be deemed to have "beneficial ownership" of all securities that such person has the right to acquire, whether such right is currently exercisable or is exercisable only upon the occurrence of a subsequent condition), directly or indirectly, of more than 50% of the Voting Stock of CCIC (measured by voting power rather than number of shares); provided that transfers of Equity Interests in CCIC between or among the beneficial owners of CCIC's Equity Interests and/or Equity Interests in 58

CCUK, in each case as of the date of the indenture, will not be deemed to cause a Change of Control under this clause (3) so long as no single Person together with its Affiliates acquires a beneficial interest in more of the Voting Stock of CCIC than is at the time collectively beneficially owned by the Principals and their Related Parties; (4) the first day on which a majority of the members of the board of directors of CCIC are not Continuing Directors; or (5) CCIC consolidates with, or merges with or into, any Person, or any Person consolidates with, or merges with or into, CCIC, in any such event pursuant to a transaction in which any of the outstanding Voting Stock of CCIC is converted into or exchanged for cash, securities or other property, other than any such transaction where: (a) the Voting Stock of CCIC outstanding immediately prior to such transaction is converted into or exchanged for Voting Stock (other than Disqualified Stock) of the surviving or transferee Person constituting a majority of the outstanding shares of such Voting Stock of such surviving or transferee Person (immediately after giving effect to such issuance); or (b) the Principals and their Related Parties own a majority of such outstanding shares after such transaction. "Change of Control Offer" has the meaning set forth above under the caption "Repurchase at the Option of Holders--Change of Control". "Change of Control Payment" has the meaning set forth above under the caption "Repurchase at the Option of Holders--Change of Control". "Change of Control Payment Date" has the meaning set forth above under the caption "Repurchase at the Option of Holders--Change of Control". "Completed Tower" means any wireless transmission tower owned or managed by CCIC or any of its Restricted Subsidiaries that, as of any date of determination: (1) has at least one wireless communications or broadcast tenant that has executed a definitive lease with CCIC or any of its Restricted Subsidiaries, which lease is producing revenue with respect to the tower as of the date of determination; and (2) has capacity for at least two tenants in addition to the tenant referred to in clause (1) of this definition. "Consolidated Cash Flow" means, with respect to any Person for any period, the Consolidated Net Income of such Person for such period; plus: (1) provision for taxes based on income or profits of such Person and its Restricted Subsidiaries for such period, to the extent that such provision for taxes was included in computing such Consolidated Net Income; plus (2) consolidated interest expense of such Person and its Restricted Subsidiaries for such period, whether paid or accrued and whether or not capitalized (including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments, the interest component of any deferred payment obligations, the interest component of all payments associated with Capital Lease Obligations, commissions, discounts and other fees and charges incurred in respect of letters of credit or bankers' acceptance financings, and net payments (if any) pursuant to Hedging Obligations), to the extent that any such expense was deducted in computing such Consolidated Net Income; plus 59

(3) depreciation, amortization (including amortization of goodwill and other intangibles) and other non-cash expenses (excluding any such non- cash expense to the extent that it represents an accrual of or reserve for cash expenses in any future period) of such Person and its Restricted Subsidiaries for such period to the extent that such depreciation, amortization and other non-cash expenses were deducted in computing such Consolidated Net Income; minus (4) non-cash items increasing such Consolidated Net Income for such period (excluding any items that were accrued in the ordinary course of business), in each case on a consolidated basis and determined in accordance with GAAP. "Consolidated Indebtedness" means, with respect to any Person as of any date of determination, the sum, without duplication, of: (1) the total amount of Indebtedness of such Person and its Restricted Subsidiaries; plus (2) the total amount of Indebtedness of any other Person, to the extent that such Indebtedness has been Guaranteed by the referent Person or one or more of its Restricted Subsidiaries; plus (3) the aggregate liquidation value of all Disqualified Stock of such Person and all preferred stock of Restricted Subsidiaries of such Person, in each case, determined on a consolidated basis in accordance with GAAP. "Consolidated Interest Expense" means, with respect to any Person for any period: (1) the consolidated interest expense of such Person and its Restricted Subsidiaries for such period determined in accordance with GAAP, whether paid or accrued and whether or not capitalized (including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments, the interest component of any deferred payment obligations, the interest component of all payments associated with Capital Lease Obligations, imputed interest with respect to Attributable Debt, commissions, discounts and other fees and charges incurred in respect of letter of credit or bankers' acceptance financings, and net payments, if any, pursuant to Hedging Obligations); plus (2) all preferred stock dividends paid or accrued in respect of CCIC's and its Restricted Subsidiaries' preferred stock to Persons other than CCIC or a Wholly Owned Restricted Subsidiary of CCIC other than preferred stock dividends paid by CCIC in shares of preferred stock that is not Disqualified Stock. "Consolidated Net Income" means, with respect to any Person for any period, the aggregate of the Net Income of such Person and its Restricted Subsidiaries for such period, on a consolidated basis, determined in accordance with GAAP; provided that: (1) the Net Income (but not loss) of any Person other than CCIC that is not a Restricted Subsidiary or that is accounted for by the equity method of accounting shall be included only to the extent of the amount of dividends or distributions paid in cash to the referent Person or a Restricted Subsidiary thereof; (2) the Net Income of any Person acquired in a pooling of interests transaction for any period prior to the date of such acquisition shall be excluded; (3) the cumulative effect of a change in accounting principles shall be excluded; and (4) the Net Income (but not loss) of any Unrestricted Subsidiary shall be excluded whether or not distributed to CCIC or one of its Restricted Subsidiaries. "Consolidated Tangible Assets" means, with respect to CCIC, the total consolidated assets of CCIC and its Restricted Subsidiaries, less the total intangible assets of CCIC and its Restricted 60

Subsidiaries, as shown on the most recent internal consolidated balance sheet of CCIC and such Restricted Subsidiaries calculated on a consolidated basis in accordance with GAAP. "Continuing Directors" means, as of any date of determination, any member of the board of directors of CCIC who: (1) was a member of such board of directors on the date of the August 1999 Senior Note Indenture; (2) was nominated for election or elected to such board of directors with the approval of a majority of the Continuing Directors who were members of such board of directors at the time of such nomination or election; or (3) is a designee of a Principal or was nominated by a Principal. "Covenant Defeasance" has the meaning set forth above under the caption "Legal Defeasance and Covenant Defeasance". "Credit Facilities" means one or more debt facilities (including, without limitation, the Senior Credit Facility) or commercial paper facilities with banks or other institutional lenders providing for revolving credit loans, term loans, receivables financing (including through the sale of receivables to such lenders or to special purpose entities formed to borrow from such lenders against such receivables) or letters of credit, in each case, as amended, restated, modified, renewed, refunded, replaced or refinanced in whole or in part from time to time. "Debt to Adjusted Consolidated Cash Flow Ratio" means, as of any date of determination, the ratio of: (1) the Consolidated Indebtedness of CCIC as of such date to (2) the Adjusted Consolidated Cash Flow of CCIC as of such date. "Default" means any event that is, or with the passage of time or the giving of notice or both would be, an Event of Default. "Disqualified Stock" means any Capital Stock that, by its terms (or by the terms of any security into which it is convertible or for which it is exchangeable, in each case, at the option of the holder thereof), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or redeemable at the option of the holder thereof, in whole or in part, on or prior to the date that is 91 days after the date on which the notes mature; provided, however, that any Capital Stock that would constitute Disqualified Stock solely because the holders thereof have the right to require CCIC to repurchase such Capital Stock upon the occurrence of a Change of Control or an Asset Sale shall not constitute Disqualified Stock if the terms of such Capital Stock provide that CCIC may not repurchase or redeem any such Capital Stock pursuant to such provisions unless such repurchase or redemption complies with the covenant described above the caption "--Certain Covenants--Restricted Payments". "Eligible Indebtedness" means any Indebtedness other than: (1) Indebtedness in the form of, or represented by, bonds or other securities or any guarantee thereof; and (2) Indebtedness that is, or may be, quoted, listed or purchased and sold on any stock exchange, automated trading system or over-the-counter or other securities market (including, without prejudice to the generality of the foregoing, the market for securities eligible for resale pursuant to Rule 144A under the Securities Act). "Equity Interests" means Capital Stock and all warrants, options or other rights to acquire Capital Stock (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock). 61

"Excess Proceeds" has the meaning set forth above under the caption "Repurchase at the Option of Holders--Asset Sales". "Existing Indebtedness" means Indebtedness of CCIC and its Subsidiaries (other than Indebtedness under the Senior Credit Facility) in existence on August 3, 1999, until such amounts are repaid. "GAAP" means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession, which are in effect on the date of the indenture. "Guarantee" means a guarantee (other than by endorsement of negotiable instruments for collection in the ordinary course of business), direct or indirect, in any manner (including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof), of all or any part of any Indebtedness. "Hedging Obligations" means, with respect to any Person, the obligations of such Person under: (1) interest rate swap agreements, interest rate cap agreements and interest rate collar agreements; and (2) other agreements or arrangements designed to protect such Person against fluctuations in interest rates or currency exchange rates. "Holder" means a Person in whose name a note is registered. "Indebtedness" means, with respect to any Person, any indebtedness of such Person, whether or not contingent, in respect of borrowed money or evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in respect thereof) or banker's acceptances or representing Capital Lease Obligations or the balance deferred and unpaid of the purchase price of any property or representing any Hedging Obligations, except any such balance that constitutes an accrued expense or trade payable, if and to the extent any of the foregoing indebtedness (other than letters of credit and Hedging Obligations) would appear as a liability upon a balance sheet of such Person prepared in accordance with GAAP, as well as all Indebtedness of others secured by a Lien on any asset of such Person whether or not such Indebtedness is assumed by such Person (the amount of such Indebtedness as of any date being deemed to be the lesser of the value of such property or assets as of such date or the principal amount of such Indebtedness of such other Person so secured) and, to the extent not otherwise included, the Guarantee by such Person of any Indebtedness of any other Person. The amount of any Indebtedness outstanding as of any date shall be: (1) the accreted value thereof, in the case of any Indebtedness issued with original issue discount; and (2) the principal amount thereof, together with any interest thereon that is more than 30 days past due, in the case of any other Indebtedness. "Investments" means, with respect to any Person, all investments by such Person in other Persons (including Affiliates) in the forms of direct or indirect loans (including guarantees of Indebtedness or other obligations), advances or capital contributions (excluding commission, travel and similar advances to officers and employees made in the ordinary course of business), purchases or other acquisitions for consideration of Indebtedness, Equity Interests or other securities, together 62

with all items that are or would be classified as investments on a balance sheet prepared in accordance with GAAP. If CCIC or any Restricted Subsidiary of CCIC sells or otherwise disposes of any Equity Interests of any direct or indirect Subsidiary of CCIC or a Restricted Subsidiary of CCIC issues any of its Equity Interests such that, in each case, after giving effect to any such sale or disposition, such Person is no longer a Restricted Subsidiary of CCIC, CCIC shall be deemed to have made an Investment on the date of any such sale or disposition equal to the fair market value of the Equity Interests of such Subsidiary not sold or disposed of in an amount determined as provided in the final paragraph of the covenant described above under the caption "--Certain Covenants--Restricted Payments". "Legal Defeasance" has the meaning set forth above under the caption "Legal Defeasance and Covenant Defeasance". "Lien" means, with respect to any asset, any mortgage, lien, pledge, charge, security interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law (including any conditional sale or other title retention agreement, any lease in the nature thereof, any option or other agreement to sell or give a security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction). "May 1999 Senior Discount Note Indenture" means that certain indenture, dated as of May 15, 1999, between CCIC and United States Trust Company of New York, as trustee, governing CCIC's 10 3/8% Senior Discount Notes due 2011. "Net Income" means, with respect to any Person, the net income (loss) of such Person, determined in accordance with GAAP and before any reduction in respect of preferred stock dividends, excluding, however: (1) any gain or loss, together with any related provision for taxes on such gain or loss, realized in connection with: (a) any Asset Sale (including, without limitation, dispositions pursuant to sale and leaseback transactions); or (b) the disposition of any securities by such Person or any of its Restricted Subsidiaries or the extinguishment of any Indebtedness of such Person or any of its Restricted Subsidiaries; and (2) any extraordinary gain or loss, together with any related provision for taxes on such extraordinary gain or loss. "Net Proceeds" means the aggregate cash proceeds received by CCIC or any of its Restricted Subsidiaries in respect of any Asset Sale (including, without limitation, any cash received upon the sale or other disposition of any non- cash consideration received in any Asset Sale), net of: (1) the direct costs relating to such Asset Sale (including, without limitation, legal, accounting and investment banking fees, and sales commissions) and any relocation expenses incurred as a result thereof; (2) taxes paid or payable as a result thereof (after taking into account any available tax credits or deductions and any tax sharing arrangements); (3) amounts required to be applied to the repayment of Indebtedness (other than Indebtedness under a Credit Facility) secured by a Lien on the asset or assets that were the subject of such Asset Sale; (4) all distributions and other payments required to be made to minority interest holders in Restricted Subsidiaries as a result of such Asset Sale; 63

(5) the deduction of appropriate amounts provided by the seller as a reserve in accordance with GAAP against any liabilities associated with the assets disposed of in such Asset Sale and retained by CCIC or any Restricted Subsidiary after such Asset Sale; and (6) without duplication, any reserves that CCIC's board of directors determines in good faith should be made in respect of the sale price of such asset or assets for post closing adjustments; provided that in the case of any reversal of any reserve referred to in clause (5) or (6) above, the amount so reversed shall be deemed to be Net Proceeds from an Asset Sale as of the date of such reversal. "Non-Recourse Debt" means Indebtedness: (1) as to which neither CCIC nor any of its Restricted Subsidiaries: (a) provides credit support of any kind (including any undertaking, agreement or instrument that would constitute Indebtedness); (b) is directly or indirectly liable (as a guarantor or otherwise); or (c) constitutes the lender; (2) no default with respect to which (including any rights that the holders thereof may have to take enforcement action against an Unrestricted Subsidiary) would permit (upon notice, lapse of time or both) any holder of any other Indebtedness of CCIC or any of its Restricted Subsidiaries to declare a default on such other Indebtedness or cause the payment thereof to be accelerated or payable prior to its stated maturity; and (3) as to which the lenders have been notified in writing that they will not have any recourse to the stock or assets of CCIC or any of its Restricted Subsidiaries (except that this clause (3) will not apply to any indebtedness incurred by CCUK and its Subsidiaries prior to the date CCUK became a Subsidiary). "Payment Default" has the meaning set forth above under the caption "Events of Default and Remedies". "Permitted Business" means any business conducted by CCIC, its Restricted Subsidiaries or CCUK and its Subsidiaries on the date of the indenture and any other business related, ancillary or complementary to any such business. "Permitted Investment" means: (1) any Investment in CCIC or in a Restricted Subsidiary of CCIC; (2) any Investment in Cash Equivalents; (3) any Investment by CCIC or any Restricted Subsidiary of CCIC in a Person, if as a result of such Investment: (a) such Person becomes a Restricted Subsidiary of CCIC; or (b) such Person is merged, consolidated or amalgamated with or into, or transfers or conveys substantially all of its assets to, or is liquidated into, CCIC or a Restricted Subsidiary of CCIC; (4) any Restricted Investment made as a result of the receipt of non- cash consideration from an Asset Sale that was made pursuant to and in compliance with the covenant described above under the caption "-- Repurchase at the Option of Holders--Asset Sales"; (5) any acquisition of assets solely in exchange for the issuance of Equity Interests (other than Disqualified Stock) of CCIC; 64

(6) receivables created in the ordinary course of business; (7) loans or advances to employees made in the ordinary course of business since the date of the August 1999 Senior Note Indenture not to exceed $2.0 million at any one time outstanding; (8) securities and other assets received in settlement of trade debts or other claims arising in the ordinary course of business; (9) purchase of additional Equity Interests in CCUK for cash pursuant to the governance agreement as the same is in effect on the date of the May 1999 Senior Discount Note Indenture for aggregate cash consideration not to exceed $20.0 million since the beginning of the quarter during which the May 1999 Senior Discount Note Indenture was executed; (10) Investments since the date of the August 1999 Senior Note Indenture of up to an aggregate of $100.0 million (each such Investment being measured as of the date made and without giving effect to subsequent changes in value); and (11) other Investments in Permitted Businesses since the date of the August 1999 Senior Note Indenture not to exceed an amount equal to $10.0 million plus 10% of CCIC's Consolidated Tangible Assets at any one time outstanding (each such Investment being measured as of the date made and without giving effect to subsequent changes in value). "Permitted Liens" means: (1) Liens securing Eligible Indebtedness of CCIC under one or more Credit Facilities that was permitted by the terms of the indenture to be incurred; (2) Liens securing any Indebtedness of any of CCIC's Restricted Subsidiaries that was permitted by the terms of the indenture to be incurred; (3) Liens in favor of CCIC; (4) Liens existing on the date of the August 1999 Senior Note Indenture; (5) Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in good faith by appropriate proceedings promptly instituted and diligently concluded; provided that any reserve or other appropriate provision as shall be required in conformity with GAAP shall have been made therefor; (6) Liens securing Indebtedness permitted to be incurred under clause (5) of the second paragraph of the covenant described above under the caption "--Certain Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock"; and (7) Liens incurred in the ordinary course of business of CCIC or any Restricted Subsidiary of CCIC since the date of the August 1999 Senior Note Indenture with respect to obligations that do not exceed $5.0 million at any one time outstanding and that: (a) are not incurred in connection with the borrowing of money or the obtaining of advances or credit (other than trade credit in the ordinary course of business); and (b) do not in the aggregate materially detract from the value of the property or materially impair the use thereof in the operation of business by CCIC or such Restricted Subsidiary. "Permitted Refinancing Indebtedness" means any Indebtedness of CCIC or any of its Restricted Subsidiaries issued in exchange for, or the net proceeds of which are used to extend, refinance, 65

renew, replace, defease or refund other Indebtedness of CCIC or any of its Restricted Subsidiaries (other than intercompany Indebtedness); provided that: (1) the principal amount (or initial accreted value, if applicable) of such Permitted Refinancing Indebtedness does not exceed the principal amount of (or accreted value, if applicable), plus accrued interest on, the Indebtedness so extended, refinanced, renewed, replaced, defeased or refunded (plus the amount of expenses and prepayment premiums incurred in connection therewith); (2) such Permitted Refinancing Indebtedness has a final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity equal to or greater than the Weighted Average Life to Maturity of, the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded; (3) if the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded is subordinated in right of payment to the notes, such Permitted Refinancing Indebtedness is subordinated in right of payment to, the notes on terms at least as favorable to the holders of notes as those contained in the documentation governing the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded; and (4) such Indebtedness is incurred either by CCIC or by the Restricted Subsidiary who is the obligor on the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded. "Person" means any individual, corporation, partnership, joint venture, association, joint-stock company, trust, unincorporated organization or government or agency or political subdivision thereof (including any subdivision or ongoing business of any such entity or substantially all of the assets of any such entity, subdivision or business). "Principals" means Berkshire Fund III, Limited Partnership; Berkshire Fund IV, Limited Partnership; Berkshire Investors LLC; Berkshire Partners LLC; Centennial Fund IV, L.P.; Centennial Fund V, L.P.; Centennial Entrepreneurs Fund V, L.P.; Nassau Capital Partners II, L.P.; and NAS Partners I, L.L.C. and any Related Party of the foregoing. "Public Equity Offering" means an underwritten primary public offering of common stock of CCIC pursuant to an effective registration statement under the Securities Act. "Related Party" with respect to any Principal means: (1) any controlling stockholder, 80% (or more) owned Subsidiary of such Principal; or (2) any trust, corporation, partnership or other entity, the beneficiaries, stockholders, members, partners, owners or Persons beneficially holding an 80% or more controlling interest of which consist of such Principal and/or such other Persons referred to in the immediately preceding clause (1). "Restricted Investment" means an Investment other than a Permitted Investment. "Restricted Subsidiary" of a Person means any Subsidiary of the referent Person that is not an Unrestricted Subsidiary. "Senior Credit Facility" means that certain Credit Agreement, dated as of March 15, 2000, by and among The Chase Manhattan Bank, Key Corporate Capital, Inc. and The Bank of Nova Scotia as agents for the several lenders and Crown Castle Operating Company and CCIC, including any related notes, guarantees, collateral documents, instruments and agreements executed in connection therewith, and in each case as amended, modified, renewed, refunded, replaced or refinanced from time to time. 66

"Significant Subsidiary" means, with respect to any Person, any Restricted Subsidiary of such Person that would be a "significant subsidiary" of such Person as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated pursuant to the Act, as such Regulation is in effect on the date hereof, except that all references to "10 percent" in Rule 1-02(w)(1), (2) and (3) shall mean "5 percent" and that all Unrestricted Subsidiaries of CCIC shall be excluded from all calculations under Rule 1-02(w). "Stated Maturity" means, with respect to any installment of interest or principal on any series of Indebtedness, the date on which such payment of interest or principal was scheduled to be paid in the original documentation governing such Indebtedness, and shall not include any contingent obligations to repay, redeem or repurchase any such interest or principal prior to the date originally scheduled for the payment thereof. "Strategic Equity Investment" means a cash contribution to the common equity capital of CCIC or a purchase from CCIC of common Equity Interests (other than Disqualified Stock), in either case by or from a Strategic Equity Investor and for aggregate cash consideration of at least $50.0 million. "Strategic Equity Investor" means a Person engaged in a Permitted Business whose Total Equity Market Capitalization exceeds $1.0 billion. "Subsidiary" means, with respect to any Person: (1) any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof is at the time owned or controlled, directly or indirectly, by such Person or one or more of the other Subsidiaries of that Person (or a combination thereof); and (2) any partnership: (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person; or (b) the only general partners of which are such Person or one or more Subsidiaries of such Person (or any combination thereof). "Total Equity Market Capitalization" of any Person means, as of any day of determination, the sum of: (1) the product of: (a) the aggregate number of outstanding primary shares of common stock of such Person on such day (which shall not include any options or warrants on, or securities convertible or exchangeable into, shares of common stock of such person); multiplied by (b) the average closing price of such common stock listed on a national securities exchange or the Nasdaq National Market System over the 20 consecutive business days immediately preceding such day; plus (2) the liquidation value of any outstanding shares of preferred stock of such Person on such day. "Tower Asset Exchange" means any transaction in which CCIC or one of its Restricted Subsidiaries exchanges assets for Tower Assets and/or cash or Cash Equivalents where the fair market value (evidenced by a resolution of the board of directors set forth in an officers' certificate delivered to the trustee) of the Tower Assets and cash or Cash Equivalents received by CCIC and its Restricted Subsidiaries in such exchange is at least equal to the fair market value of the assets disposed of in such exchange. 67

"Tower Assets" means wireless transmission towers and related assets that are located on the site of a transmission tower. "Tower Cash Flow" means, for any period, the Consolidated Cash Flow of CCIC and its Restricted Subsidiaries for such period that is directly attributable to site rental revenue or license fees paid to lease or sublease space on communication sites owned or leased by CCIC, all determined on a consolidated basis and in accordance with GAAP. Tower Cash Flow will not include revenue or expenses attributable to non-site rental services provided by CCIC or any of its Restricted Subsidiaries to lessees of communication sites or revenues derived from the sale of assets. "Unrestricted Subsidiary" means any Subsidiary of CCIC that is designated by the board of directors as an Unrestricted Subsidiary pursuant to a board resolution; but only to the extent that such Subsidiary: (1) has no Indebtedness other than Non-Recourse Debt; (2) is not party to any agreement, contract, arrangement or understanding with CCIC or any Restricted Subsidiary of CCIC unless the terms of any such agreement, contract, arrangement or understanding are no less favorable to CCIC or such Restricted Subsidiary than those that might be obtained at the time from Persons who are not Affiliates of CCIC; (3) is a Person with respect to which neither CCIC nor any of its Restricted Subsidiaries has any direct or indirect obligation: (a) to subscribe for additional Equity Interests; or (b) to maintain or preserve such Person's financial condition or to cause such Person to achieve any specified levels of operating results; (4) has not guaranteed or otherwise directly or indirectly provided credit support for any Indebtedness of CCIC or any of its Restricted Subsidiaries; and (5) has at least one director on its board of directors that is not a director or executive officer of CCIC or any of its Restricted Subsidiaries and has at least one executive officer that is not a director or executive officer of CCIC or any of its Restricted Subsidiaries. Any such designation by the board of directors shall be evidenced to the trustee by filing with the trustee a certified copy of the board resolution giving effect to such designation and an officers' certificate certifying that such designation complied with the foregoing conditions and was permitted by the covenant described above under the caption "--Certain Covenants--Restricted Payments". If, at any time, any Unrestricted Subsidiary would fail to meet the foregoing requirements as an Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted Subsidiary for purposes of the Indenture and any Indebtedness of that Subsidiary shall be deemed to be incurred by a Restricted Subsidiary of CCIC as of such date (and, if such Indebtedness is not permitted to be incurred as of such date under the covenant described above under the caption "--Certain Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock", CCIC shall be in default of such covenant). The board of directors of CCIC may at any time designate any Unrestricted Subsidiary to be a Restricted Subsidiary; provided that the designation shall be deemed to be an incurrence of Indebtedness by a Restricted Subsidiary of CCIC of any outstanding Indebtedness of such Unrestricted Subsidiary and the designation shall only be permitted if: (1) such Indebtedness is permitted under the covenant described above under the caption "--Certain Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock", calculated on a pro forma basis as if such designation had occurred at the beginning of the four-quarter reference period; and (2) no Default would occur or be in existence following such designation. 68

"Voting Stock" of any Person as of any date means the Capital Stock of such Person that is at the time entitled to vote in the election of the board of directors of such Person. "Weighted Average Life to Maturity" means, when applied to any Indebtedness at any date, the number of years obtained by dividing: (1) the sum of the products obtained by multiplying: (a) the amount of each then remaining installment, sinking fund, serial maturity or other required payments of principal, including payment at final maturity, in respect thereof; by (b) the number of years (calculated to the nearest one-twelfth) that will elapse between such date and the making of such payment; by (2) the then outstanding principal amount of such Indebtedness. "Wholly Owned Restricted Subsidiary" of any Person means a Restricted Subsidiary of such Person all of the outstanding Capital Stock or other ownership interests of which (other than directors' qualifying shares) shall at the time be owned by such Person or by one or more Wholly Owned Restricted Subsidiaries of such Person and one or more Wholly Owned Restricted Subsidiaries of such Person. 69

CERTAIN U.S. FEDERAL INCOME TAX CONSIDERATIONS The following discussion is a summary of certain U.S. Federal income tax consequences of the exchange offer to holders of old notes, but is not a complete analysis of all potential tax effects. The summary below is based upon the Internal Revenue Code of 1986, as amended (the "Code"), regulations of the Treasury Department, administrative rulings and pronouncements of the Internal Revenue Service and judicial decisions, all of which are subject to change, possibly with retroactive effect. This summary does not address all of the U.S. Federal income tax consequences that may be applicable to particular holders, including dealers in securities, financial institutions, insurance companies and tax-exempt organizations. In addition, this summary does not consider the effect of any foreign, state, local, gift, estate or other tax laws that may be applicable to a particular holder. This summary applies only to a holder that acquired old notes at original issue for cash and holds such old notes as a capital asset within the meaning of Section 1221 of the Code. Holders of old notes considering the exchange offer should consult their own tax advisors concerning the U.S. federal income tax consequences in light of their particular situations as well as any consequences arising under the laws of any other taxing jurisdiction. An exchange of old notes for new notes pursuant to the exchange offer will not be treated as a taxable exchange or other taxable event for U.S. Federal income tax purposes. Accordingly, there will be no U.S. Federal income tax consequences to holders who exchange their old notes for new notes in connection with the exchange offer and any such holder will have the same adjusted tax basis and holding period in the new notes as it had in the old notes immediately before the exchange. The foregoing discussion of certain U.S. Federal income tax considerations does not consider the facts and circumstances of any particular holder's situation or status. Accordingly, each holder of old notes should consult its own tax advisor regarding the tax consequences of the exchange offer to it, including those under state, foreign and other tax laws. PLAN OF DISTRIBUTION Each broker-dealer that receives new notes for its own account in connection with the exchange offer must acknowledge that it will deliver a prospectus in connection with any resale of such new notes. This prospectus, as it may be amended or supplemented from time to time, may be used by a broker- dealer in connection with resales of new notes received in exchange for old notes where such old notes were acquired as a result of market-making activities or other trading activities. We have agreed that for a period of 180 days after the expiration date, we will make available a prospectus, as amended or supplemented, meeting the requirements of the Securities Act of 1933 to any broker-dealer for use in connection with any such resale. In addition, until , 2001 (90 days after the date of this prospectus), all dealers effecting transactions in the new notes may be required to deliver a prospectus. We will not receive any proceeds from any sale of new notes by broker- dealers. New notes received by broker-dealers for their own account pursuant to the exchange offer may be sold from time to time in one or more transactions in the over-the counter market, in negotiated transactions, through the writing of options on the new notes or a combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to such prevailing market prices or negotiated prices. Any such resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any such broker-dealer or the purchasers of any such new notes. Any broker-dealer that resells new notes that were received by it for its own account pursuant to the exchange offer and any broker or dealer that participates in a distribution of such new notes may be deemed to be an "underwriter" within the meaning of the Securities Act of 1933, and any profit on any such resale of new notes and any 70

commissions or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act of 1933. The letter of transmittal states that by acknowledging that it will deliver and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act of 1933. LEGAL MATTERS The validity of the new notes offered hereby will be passed on by Cravath, Swaine & Moore, New York, New York. EXPERTS The consolidated financial statements and schedules of CCIC as of December 31, 1999 and 2000, and for each of the three years in the period ended December 31, 2000, have been incorporated by reference in this prospectus and the registration statement in reliance upon the reports of KPMG LLP, independent certified public accountants, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing. CERTAIN CURRENCY TRANSLATIONS CCUK publishes its consolidated financial statements in pounds sterling. For the convenience of the reader, this prospectus contains translations of certain pound sterling amounts into U.S. dollars at specified rates or, if not so specified, at the noon buying rate in New York City for cable transfers in pounds sterling as certified for customs purposes by the Federal Reserve Bank of New York on March 30, 2001, of (Pounds)1.00 = $1.4190. No representation is made that the pound sterling amounts have been, could have been or could be converted into U.S. dollars at the rates indicated or any other rates. On June 15, 2001, the noon buying rate was (Pounds)1.00 = $1.4056. 71

$450,000,000 9 3/8% Senior Notes Due 2011 [LOGO OF CROWN CASTLE INTERNATIONAL] CROWN CASTLE INTERNATIONAL CORP. Offer to Exchange all Outstanding 9 3/8% Senior Notes Due 2011 for 9 3/8% Senior Notes Due 2011 which have been Registered under the Securities Act of 1933 ------------ Prospectus , 2001 ------------ Until , 2001, all dealers that effect transactions in these securities, whether or not participating in this exchange offer, may be required to deliver a prospectus. This is in addition to the dealers' obligation to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

PART II INFORMATION NOT REQUIRED IN THE PROSPECTUS Item 20. Indemnification of Directors and Officers Section 145 of the General Corporation Law of the State of Delaware ("DGCL") provides that a corporation has the power to indemnify any director or officer, or former director or officer, who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) against the expenses (including attorney's fees), judgments, fines or amounts paid in settlement actually and reasonably incurred by them in connection with the defense of any action by reason of being or having been directors or officers, if such person shall have acted in good faith and in a manner reasonably believed to be in or not opposed to the best interests of the corporation and with respect to any criminal action or proceeding, provided that such person had no reasonable cause to believe his conduct was unlawful, except that, if such action shall be in the right of the corporation, no such indemnification shall be provided as to any claim, issue or matter as to which such person shall have been judged to have been liable to the corporation unless and to the extent that the Court of Chancery of the State of Delaware (the "Court of Chancery") or any court in which such suit or action was brought shall determine upon application that, in view of all of the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses as such court shall deem proper. Accordingly, the Restated Certificate of Incorporation of the Company provides that the Company shall, to the maximum extent permitted under the DGCL, indemnify each person who is or was a director or officer of the Company. The Company may, by action of the Board of Directors, indemnify other employees and agents of the Corporation, directors, officers, employees or agents of a subsidiary, and each person serving as a director, officer, partner, member, employee or agent of another corporation, partnership, limited liability company, joint venture, trust or other enterprise, at the request of the Company, with the same scope and effect as the indemnification of directors and officers of the Company. Notwithstanding the foregoing, the Company shall be required to indemnify any person seeking indemnification in connection with a proceeding (or part thereof) initiated by such person only if such proceeding (or part thereof) was authorized by the Board of Directors or is a proceeding to enforce such person's claim to indemnification pursuant to the rights granted by the Restated Certificate of Incorporation or otherwise by the Company. The Company may also enter into one or more agreements with any person which provide for indemnification greater or different than that provided in the Restated Certificate of Incorporation. Furthermore, a director of the Company shall not be liable to the Company or its stockholders for monetary damages for breach of fiduciary duty as a director, except for liability (1) for any breach of the director's duty of loyalty to the Company or its stockholders, (2) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (3) under Section 174 of the DGCL, or (4) for any transaction from which the director derived an improper personal benefit. The Company's By-laws provide that each person who was or is made a party or is threatened to be made a party to or is involved in any manner in any threatened, pending or completed action, suit, or proceeding, whether civil, criminal, administrative or investigative ("Proceeding"), by reason of the fact that he or she or a person of whom he or she is the legal representative is or was a director or officer of the Company or, while a director or officer of the Company, a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, shall be indemnified and held harmless by the Company to the fullest extent permitted by the DGCL. Such indemnification shall continue as to a person who has ceased to be a director or officer and shall inure to the benefit of his or her heirs, executors and administrators; provided, however, that the II-1

Company shall indemnify any such person seeking indemnification in connection with a Proceeding (or part thereof) initiated by such person only if such Proceeding (or part thereof) was authorized by the Board of Directors or is a Proceeding to enforce such person's claim to indemnification pursuant to the rights granted by the Company's By-laws. The Company shall pay the expenses incurred by any person described in the first two sentences of this paragraph in defending any such Proceeding in advance of its final disposition upon, to the extent such an undertaking is required by applicable law, receipt of an undertaking by or on behalf of such person to repay such amount if it shall ultimately be determined that such person is not entitled to be indemnified by the Company as authorized in the Company's By-laws or otherwise. The Company's By-laws further provide that the indemnification and the advancement of expenses incurred in defending a Proceeding prior to its final disposition provided by, or granted pursuant to, the Company's By-laws shall not be exclusive of any other right which any person may have or hereafter acquire under any statute, provision of the Restated Certificate of Incorporation, other provision of the Company's By-laws or otherwise. The Company may also maintain insurance, at its expense, to protect itself and any person who is or was a director, officer, partner, member, employee or agent of the Company or a subsidiary or of another corporation, partnership, limited liability company, joint venture, trust or other enterprise against any expense, liability or loss, whether or not the Company would have the power to indemnify such person against such expense, liability or loss under the DGCL. The Company's By-laws further provide that the Company may, to the extent authorized from time to time by the Board of Directors, grant rights to indemnification, and rights to be paid by the Company the expenses incurred in defending any Proceeding in advance of its final disposition, to any person who is or was an employee or agent (other than a director or officer) of the Company or a subsidiary thereof and to any person who is or was serving at the request of the Company or a subsidiary thereof as a director, officer, partner, member, employee or agent of another corporation, partnership, limited liability company, joint venture, trust or other enterprise, including service with respect to employee benefit plans maintained or sponsored by the Company or a subsidiary thereof, to the fullest extent of the provisions of the Company's By-laws with respect to the indemnification and advancement of expenses of directors and officers of the Company. Item 21. Exhibits and Financial Statement Schedules (a) Exhibits EXHIBIT INDEX Exhibit No. Description of Exhibit ------- ---------------------- **2.1 Formation Agreement, dated December 8, 1998, relating to the formation of Crown Atlantic Company LLC, Crown Atlantic Holding Sub LLC, and Crown Atlantic Holding Company LLC ***2.2 Amendment Number 1 to Formation Agreement, dated March 31, 1999, among Crown Castle International Corp., Cellco Partnership, doing business as Bell Atlantic Mobile, certain Transferring Partnerships and CCA Investment Corp. ***2.3 Crown Atlantic Company LLC Operating Agreement entered into as of March 31, 1999 by and between Cellco Partnership, doing business as Bell Atlantic Mobile, and Crown Atlantic Holding Sub LLC ****2.4 Amendment to Sublease, dated June 1, 1999, by and among BellSouth Mobility Inc., BellSouth Telecommunications Inc., The Transferring Entities, Crown Castle International Corp. and Crown Castle South Inc. ****2.5 Sublease dated June 1, 1999 by and among BellSouth Mobility Inc., Certain BMI Affiliates, Crown Castle International Corp. and Crown Castle South Inc. II-2

Exhibit No. Description of Exhibit -------- ---------------------- +2.6 Agreement to Sublease dated August 1, 1999 by and among BellSouth Personal Communications, Inc., BellSouth Carolinas PCS, L.P., Crown Castle International Corp. and Crown Castle South Inc. +2.7 Sublease dated August 1, 1999 by and among BellSouth Personal Communications, Inc., BellSouth Carolinas PCS, L.P., Crown Castle International Corp. and Crown Castle South Inc. ++2.8 Formation Agreement dated November 7, 1999 relating to the formation of Crown Castle GT Company LLC, Crown Castle GT Holding Sub LLC, and Crown Castle GT Holding Company LLC ++2.9 Letter Agreement dated November 7, 1999 between GTE Wireless Incorporated and Crown Castle International Corp. +2.10 Operating Agreement, dated January 31, 2000, by and between Crown Castle GT Corp. and affiliates of GTE Wireless Incorporated #4.1 Trust Deed related to (Pounds) 125,000,000 9% Guaranteed Bonds Due 2007 among Castle Transmission (Finance) PLC, as Issuer, Castle Transmission International Ltd. and Castle Transmission Services (Holdings) Ltd., as Guarantors, and The Law Debenture Trust Corporation p.l c., as Trustee, dated May 21, 1997 #4.2 First Supplemental Trust Deed related to (Pounds) 125,000,000 9% Guaranteed Bonds Due 2007 among Castle Transmission (Finance) PLC, as Issuer, Castle Transmission International Ltd. and Castle Transmission Services (Holdings) Ltd., as Guarantors, and The Law Debenture Trust Corporation p.l c., as Trustee, dated October 17, 1997 #4.3 Indenture, dated as of November 25, 1997, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 5/8% Senior Discount Notes Due 2007 (including exhibits) #4.4 Article Fourth of Certificate of Incorporation of Castle Tower Holding Corp. (included in Exhibit 3.1) ##4.5 Specimen Certificate of Common Stock ###4.6 Indenture, dated as of December 21, 1998, between Crown Castle International Corp. and the United States Trust Company of New York, as Trustee, relating to the 12 3/4% Senior Subordinated Exchange Debentures Due 2010 (including exhibits) ####4.7 Indenture, dated as of May 17, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 9% Senior Notes Due 2011 (including exhibits) ####4.8 Indenture, dated as of May 17, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 3/8% Senior Discount Notes Due 2011 (including exhibits) ****4.9 Registration Rights Agreement dated June 1, 1999, between BellSouth Mobility Inc. and Crown Castle International Corp. ####4.10 Indenture, dated as of August 3, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 9 1/2% Senior Notes Due 2011 (including exhibits) ####4.11 Indenture, dated as of August 3, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 11 1/4% Senior Discount Notes Due 2011 (including exhibits) +++4.12 Deposit Agreement among Crown Castle International Corp. and the United States Trust Company of New York dated November 19, 1999 II-3

Exhibit No. Description of Exhibit ------- ---------------------- +++4.13 Registration Rights Agreement among Crown Castle International Corp., the United States Trust Company of New York and SFG-P INC. dated November 19, 1999 +++4.14 Warrant Agreement between Crown Castle International Corp. and the United States Trust Company of New York dated November 19, 1999 @4.15 Indenture, dated as of June 26, 2000, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 3/4% Senior Notes Due 2011 (including exhibits) 4.16 Indenture, dated as of May 16, 2001, between Crown Castle International Corp. and The Bank of New York, as Trustee, relating to the 9 3/8% Senior Notes Due 2011 (including exhibits) 4.17 Registration Rights Agreement among Crown Castle International Corp. and the Initial Purchasers, dated May 10, 2001 *5 Opinion of Cravath, Swaine & Moore 12 Computation of Ratios of Earnings to Fixed Charges and Earnings to Combined Fixed Charges and Preferred Stock Dividends 23.1 Consent of KPMG LLP *23.2 Consent of Cravath, Swaine & Moore (included in Exhibit 5) 24 Powers of Attorney (included in signature page) 25 Statement of Eligibility and Qualification under the Trust Indenture Act of 1939 of The Bank of New York, as Trustee, on Form T-1, relating to the 9 3/8% Senior Notes Due 2011 99.1 Form of Letter of Transmittal 99.2 Form of Notice of Guaranteed Delivery 99.3 Form of Letters to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees 99.4 Form of Letter to Clients 99.5 Form of Tax Guidelines - -------- * To be filed by amendment # Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-43873). ## Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-1 previously filed by the Registrant (Registration No. 333-57283). ** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated December 9, 1998. *** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated March 31, 1999. ### Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-71715). **** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated June 9, 1999. Incorporated by reference to the exhibit previously filed by the + Registrant on Form 10-K (Registration No. 000-24737) dated March 30, 2000. #### Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-87765). ++ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated November 7, 1999. +++ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated November 19, 1999. @ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated June 26, 2000. II-4

Item 22. Undertakings The undersigned Registrant hereby undertakes that insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions described under Item 20 above, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933 and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted against the Registrant by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act of 1933 and will be governed by the final adjudication of such issue. The undersigned Registrant hereby undertakes to respond to requests for information that is incorporated by reference into the Prospectus pursuant to Items 4, 10(b), 11, or 13 of Form S-4, within one business day of receipt of such request, and to send the incorporated documents by first class mail or other equally prompt means. This undertaking also includes documents filed subsequent to the effective date of the Registration Statement through the date of responding to the request. The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the Registrant's annual report pursuant to section 13(a) or section 15(d) of the Securities Exchange Act of 1934 (and where applicable, each filing of an employee benefit plan's annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference into the Registration Statement shall be deemed to be a new registration statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. The undersigned Registrant hereby undertakes to supply by means of a post- effective amendment all information concerning a transaction, and the company being acquired involved therein, that was not the subject of and included in the Registration Statement when it became effective. The undersigned Registrant hereby undertakes as follows: that prior to any public reoffering of the securities registered hereunder through use of a prospectus which is a part of this Registration Statement, by any person or party who is deemed to be an underwriter within the meaning of Rule 145(c), the undersigned undertakes that such reoffering prospectus will contain the information called for by the applicable registration form with respect to reofferings by persons who may be deemed underwriters, in addition to the information called for by the other Items of the applicable form. The undersigned Registrant hereby undertakes that every prospectus: (i) that is filed pursuant to the immediately preceding paragraph or (ii) that purports to meet the requirements of Section 10(a)(3) of the Securities Act of 1933 and is used in connection with an offering of securities subject to Rule 415, will be filed as a part of an amendment to the registration statement and will not be used until such amendment is effective, and that, for purposes of determining any liability under the Securities Act of 1933, each such post- effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. II-5

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on this 19th day of June, 2001. Crown Castle International Corp., /s/ W. Benjamin Moreland by: ________________________________________ Name: W. Benjamin Moreland Title: Senior Vice President, Chief Financial Officer and Treasurer Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on this 19th day of June, 2001. Signature Title --------- ----- * Chief Executive Officer and Chairman of the ______________________________________ Board (Principal Executive Officer) Ted B. Miller, Jr. * President, Chief Operating Officer and Director ______________________________________ John P. Kelley /s/ W. Benjamin Moreland Senior Vice President, Chief Financial Officer ______________________________________ and Treasurer (Principal Financial Officer) W. Benjamin Moreland * Senior Vice President, Chief Accounting Officer ______________________________________ and Corporate Controller (Principal Accounting Wesley D. Cunningham Officer) Director ______________________________________ Dale N. Hatfield * Director ______________________________________ David L. Ivy * Director ______________________________________ J. Landis Martin II-6

Signature Title --------- ----- * Director ______________________________________ Randall A. Hack * Director ______________________________________ Edward C. Hutcheson, Jr. * Director ______________________________________ Robert F. McKenzie * Director ______________________________________ William D. Strittmatter Director ______________________________________ Lee W. Hogan /s/ W. Benjamin Moreland *By: ____________________________ W. Benjamin Moreland Attorney-in-Fact II-7

POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints W. Benjamin Moreland and Wesley D. Cunningham, and each of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution for him and in his name, place and stead, in any and all capacities, to sign any and all amendments to this Registration Statement or any registration statement for this offering that is to be effective upon the filing pursuant to rule 462(b) under the Securities Act of 1933, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that each of said attorney-in-fact or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on this 19th day of June, 2001. Signature Title --------- ----- /s/ Ted B. Miller, Jr. Chief Executive Officer and Chairman of the ______________________________________ Board (Principal Executive Officer) Ted B. Miller, Jr. /s/ John P. Kelly President, Chief Operating Officer and Director ______________________________________ John P. Kelly /s/ W. Benjamin Moreland Senior Vice President and Chief Financial ______________________________________ Officer (Principal Financial Officer) W. Benjamin Moreland /s/ Wesley D. Cunningham Senior Vice President, Chief Accounting Officer ______________________________________ and Corporate Controller (Principal Accounting Wesley D. Cunningham Officer) Director ______________________________________ Dale N. Hatfield /s/ David L. Ivy Director ______________________________________ David L. Ivy /s/ J. Landis Martin Director ______________________________________ J. Landis Martin /s/ Randall A. Hack Director ______________________________________ Randall A. Hack II-8

/s/ Edward C. Hutcheson, Jr. Director ______________________________________ Edward C. Hutcheson, Jr. /s/ Robert F. McKenzie Director ______________________________________ Robert F. McKenzie /s/ William D. Strittmatter Director ______________________________________ William D. Strittmatter Director ______________________________________ Lee W. Hogan II-9

EXHIBIT INDEX Exhibit No. Description of Exhibit -------- ---------------------- **2.1 Formation Agreement, dated December 8, 1998, relating to the formation of Crown Atlantic Company LLC, Crown Atlantic Holding Sub LLC, and Crown Atlantic Holding Company LLC ***2.2 Amendment Number 1 to Formation Agreement, dated March 31, 1999, among Crown Castle International Corp., Cellco Partnership, doing business as Bell Atlantic Mobile, certain Transferring Partnerships and CCA Investment Corp. ***2.3 Crown Atlantic Company LLC Operating Agreement entered into as of March 31, 1999 by and between Cellco Partnership, doing business as Bell Atlantic Mobile, and Crown Atlantic Holding Sub LLC ****2.4 Amendment to Sublease, dated June 1, 1999, by and among BellSouth Mobility Inc., BellSouth Telecommunications Inc., The Transferring Entities, Crown Castle International Corp. and Crown Castle South Inc. ****2.5 Sublease dated June 1, 1999 by and among BellSouth Mobility Inc., Certain BMI Affiliates, Crown Castle International Corp. and Crown Castle South Inc. +2.6 Agreement to Sublease dated August 1, 1999 by and among BellSouth Personal Communications, Inc., BellSouth Carolinas PCS, L.P., Crown Castle International Corp. and Crown Castle South Inc. +2.7 Sublease dated August 1, 1999 by and among BellSouth Personal Communications, Inc., BellSouth Carolinas PCS, L.P., Crown Castle International Corp. and Crown Castle South Inc. ++2.8 Formation Agreement dated November 7, 1999 relating to the formation of Crown Castle GT Company LLC, Crown Castle GT Holding Sub LLC, and Crown Castle GT Holding Company LLC ++2.9 Letter Agreement dated November 7, 1999 between GTE Wireless Incorporated and Crown Castle International Corp. +2.10 Operating Agreement, dated January 31, 2000, by and between Crown Castle GT Corp. and affiliates of GTE Wireless Incorporated #4.1 Trust Deed related to (Pounds) 125,000,000 9% Guaranteed Bonds Due 2007 among Castle Transmission (Finance) PLC, as Issuer, Castle Transmission International Ltd. and Castle Transmission Services (Holdings) Ltd., as Guarantors, and The Law Debenture Trust Corporation p.l c., as Trustee, dated May 21, 1997 #4.2 First Supplemental Trust Deed related to (Pounds) 125,000,000 9% Guaranteed Bonds Due 2007 among Castle Transmission (Finance) PLC, as Issuer, Castle Transmission International Ltd. and Castle Transmission Services (Holdings) Ltd., as Guarantors, and The Law Debenture Trust Corporation p.l c., as Trustee, dated October 17, 1997 #4.3 Indenture, dated as of November 25, 1997, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 5/8% Senior Discount Notes Due 2007 (including exhibits) #4.4 Article Fourth of Certificate of Incorporation of Castle Tower Holding Corp. (included in Exhibit 3.1 thereto) ##4.5 Specimen Certificate of Common Stock ###4.6 Indenture, dated as of December 21, 1998, between Crown Castle International Corp. and the United States Trust Company of New York, as Trustee, relating to the 12 3/4% Senior Subordinated Exchange Debentures Due 2010 (including exhibits)

Exhibit No. Description of Exhibit -------- ---------------------- ####4.7 Indenture, dated as of May 17, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 9% Senior Notes Due 2011 (including exhibits) ####4.8 Indenture, dated as of May 17, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 3/8% Senior Discount Notes Due 2011 (including exhibits) ****4.9 Registration Rights Agreement dated June 1, 1999, between BellSouth Mobility Inc. and Crown Castle International Corp. ####4.10 Indenture, dated as of August 3, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 9 1/2% Senior Notes Due 2011 (including exhibits) ####4.11 Indenture, dated as of August 3, 1999, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 11 1/4% Senior Discount Notes Due 2011 (including exhibits) +++4.12 Deposit Agreement among Crown Castle International Corp. and the United States Trust Company of New York dated November 19, 1999 +++4.13 Registration Rights Agreement among Crown Castle International Corp., the United States Trust Company of New York and SFG-P INC. dated November 19, 1999 +++4.14 Warrant Agreement between Crown Castle International Corp. and the United States Trust Company of New York dated November 19, 1999 @4.15 Indenture, dated as of June 26, 2000, between Crown Castle International Corp. and United States Trust Company of New York, as Trustee, relating to the 10 3/4% Senior Notes Due 2011 (including exhibits) 4.16 Indenture, dated as of May 16, 2001, between Crown Castle International Corp. and The Bank of New York, as Trustee, relating to the 9 3/8% Senior Notes Due 2011 (including exhibits) 4.17 Registration Rights Agreement among Crown Castle International Corp. and the Initial Purchasers, dated May 16, 2001. *5 Opinion of Cravath, Swaine & Moore 12 Computation of Ratios of Earnings to Fixed Charges and Earnings to Combined Fixed Charges and Preferred Stock Dividends 23.1 Consent of KPMG LLP *23.2 Consent of Cravath, Swaine & Moore (included in Exhibit 5) 24 Powers of Attorney (included in signature page) 25 Statement of Eligibility and Qualification under the Trust Indenture Act of 1939 of The Bank of New York, as Trustee, on Form T-1, relating to the 9 3/8% Senior Notes Due 2011 99.1 Form of Letter of Transmittal 99.2 Form of Notice of Guaranteed Delivery 99.3 Form of Letters to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees 99.4 Form of Letter to Clients 99.5 Form of Tax Guidelines - -------- * To be filed by amendment # Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-43873). ## Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-1 previously filed by the Registrant (Registration No. 333-57283).

** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated December 9, 1998. *** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated March 31, 1999. ### Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-71715). **** Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated June 9, 1999. + Incorporated by reference to the exhibit previously filed by the Registrant on Form 10-K (Registration No. 000-24737) dated March 30, 2000. #### Incorporated by reference to the exhibits with the corresponding exhibit numbers in the Registration Statement on Form S-4 previously filed by the Registrant (Registration No. 333-87765). ++ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated November 7, 1999. +++ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated November 19, 1999. @ Incorporated by reference to the exhibit previously filed by the Registrant on Form 8-K (Registration No. 0-24737) dated June 26, 2000.

Exhibit 4.16 =============================================================================== CROWN CASTLE INTERNATIONAL CORP. ISSUER 9 3/8% SENIOR NOTES DUE 2011 ---------------------------- INDENTURE Dated as of May 16, 2001 ------------------------ The Bank of New York Trustee ------------------------ ================================================================================

CROSS-REFERENCE TABLE* Trust Indenture Act Section Indenture Section 310 (a)(1)............................................................. 7.10 (a)(2)............................................................. 7.10 (a)(3)............................................................. N.A. (a)(4)............................................................. N.A. (a)(5)............................................................. 7.10 (b)................................................................ 7.10 (c)................................................................ N.A. 311 (a)................................................................ 7.11 (b)................................................................ 7.11 (c)................................................................ N.A. 312 (a)................................................................ 2.05 (b)................................................................ 11.03 (c)................................................................ 11.03 313 (a)................................................................ 7.06 (b)(1)............................................................. N.A. (b)(2)............................................................. 7.07 (c)................................................................ 7.06;11.02 (d)................................................................ 7.06 314 (a)................................................................ 4.03;11.02 (b)................................................................ N.A. (c)(1)............................................................. 11.04 (c)(2)............................................................. 11.04 (c)(3)............................................................. N.A. (d)................................................................ N.A. (e)................................................................ 11.05 (f)................................................................ N.A. 315 (a)................................................................ 7.01 (b)................................................................ 7.05;11.02 (c)................................................................ 7.01 (d)................................................................ 7.01 (e)................................................................ 6.11 316 (a) (last sentence)................................................ 2.09 (a)(1)(A).......................................................... 6.05 (a)(1)(B).......................................................... 6.04 (a)(2)............................................................. N.A. (b)................................................................ 6.07 (c)................................................................ 2.12 317 (a)(1)............................................................. 6.08 (a)(2)............................................................. 6.09 (b)................................................................ 2.04 318 (a)................................................................ 11.01 (b)................................................................ N.A. (c)................................................................ 11.01 N.A. means not applicable. * This Cross Reference Table is not part of the Indenture.

TABLE OF CONTENTS Page ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE Section 1.01. Definitions................................................................................... 1 Section 1.02. Other Definitions............................................................................. 21 Section 1.03. Incorporation by Reference of Trust Indenture Act............................................. 21 Section 1.04. Rules of Construction......................................................................... 22 ARTICLE 2 THE NOTES Section 2.01. Form and Dating............................................................................... 22 Section 2.02. Execution and Authentication.................................................................. 23 Section 2.03. Registrar and Paying Agent.................................................................... 23 Section 2.04. Paying Agent to Hold Money in Trust........................................................... 24 Section 2.05. Holder Lists.................................................................................. 24 Section 2.06. Transfer and Exchange......................................................................... 24 Section 2.07. Replacement Notes............................................................................. 35 Section 2.08. Outstanding Notes............................................................................. 36 Section 2.09. Treasury Notes................................................................................ 36 Section 2.10. Temporary Notes............................................................................... 36 Section 2.11. Cancellation.................................................................................. 36 Section 2.12. Defaulted Interest............................................................................ 37 ARTICLE 3 REDEMPTION AND PREPAYMENT Section 3.01. Notices to Trustee............................................................................ 37 Section 3.02. Selection of Notes to Be Redeemed............................................................. 37 Section 3.03. Notice of Redemption.......................................................................... 38 Section 3.04. Effect of Notice of Redemption................................................................ 38 Section 3.05. Deposit of Redemption Price................................................................... 38 Section 3.06. Notes Redeemed in Part........................................................................ 39 Section 3.07. Optional Redemption........................................................................... 39 Section 3.08. Mandatory Redemption.......................................................................... 40 i

Section 3.09. Offer to Purchase by Application of Excess Proceeds........................................... 40 ARTICLE 4 COVENANTS Section 4.01. Payment of Notes.............................................................................. 42 Section 4.02. Maintenance of Office or Agency............................................................... 42 Section 4.03. Reports....................................................................................... 42 Section 4.04. Compliance Certificate........................................................................ 43 Section 4.05. Taxes......................................................................................... 44 Section 4.06. Stay, Extension and Usury Laws................................................................ 44 Section 4.07. Restricted Payments........................................................................... 44 Section 4.08. Dividend and Other Payment Restrictions Affecting Subsidiaries................................ 48 Section 4.09. Incurrence of Indebtedness and Issuance of Preferred Stock.................................... 49 Section 4.10. Asset Sales................................................................................... 52 Section 4.11. Transactions with Affiliates.................................................................. 54 Section 4.12. Liens......................................................................................... 55 Section 4.13. Business Activities........................................................................... 55 Section 4.14. Corporate Existence........................................................................... 55 Section 4.15. Offer to Repurchase Upon Change of Control.................................................... 55 Section 4.16. Sale and Leaseback Transactions............................................................... 57 Section 4.17. Limitation on Issuances and Sales of Capital Stock of Restricted Subsidiaries................. 57 Section 4.18. Limitation on Issuances of Guarantees of Indebtedness......................................... 58 ARTICLE 5 SUCCESSORS Section 5.01. Merger, Consolidation, or Sale of Assets...................................................... 58 Section 5.02. Successor Corporation Substituted............................................................. 59 ARTICLE 6 DEFAULTS AND REMEDIES Section 6.01. Events of Default............................................................................. 60 Section 6.02. Acceleration.................................................................................. 61 Section 6.03. Other Remedies................................................................................ 61 Section 6.04. Waiver of Past Defaults....................................................................... 62 Section 6.05. Control by Majority........................................................................... 62 ii

Section 6.06. Limitation on Suits.............................................................................. 62 Section 6.07. Rights of Holders of Notes to Receive Payment.................................................... 62 Section 6.08. Collection Suit by Trustee....................................................................... 63 Section 6.09. Trustee May File Proofs of Claim................................................................. 63 Section 6.10. Priorities....................................................................................... 63 Section 6.11. Undertaking for Costs............................................................................ 64 ARTICLE 7 TRUSTEE Section 7.01. Duties of Trustee................................................................................ 64 Section 7.02. Rights of Trustee................................................................................ 65 Section 7.03. Individual Rights of Trustee..................................................................... 65 Section 7.04. Trustee's Disclaimer............................................................................. 66 Section 7.05. Notice of Defaults............................................................................... 66 Section 7.06. Reports by Trustee to Holders of the Notes....................................................... 66 Section 7.07. Compensation and Indemnity....................................................................... 66 Section 7.08. Replacement of Trustee........................................................................... 67 Section 7.09. Successor Trustee by Merger, etc................................................................. 68 Section 7.10. Eligibility; Disqualification.................................................................... 68 Section 7.11. Preferential Collection of Claims Against Company................................................ 68 ARTICLE 8 LEGAL DEFEASANCE AND COVENANT DEFEASANCE Section 8.01. Option to Effect Legal Defeasance or Covenant Defeasance......................................... 68 Section 8.02. Legal Defeasance and Discharge................................................................... 69 Section 8.03. Covenant Defeasance.............................................................................. 69 Section 8.04. Conditions to Legal or Covenant Defeasance....................................................... 70 Section 8.05. Deposited Money and Government Securities to be Held in Trust; Other Miscellaneous Provisions.... 71 Section 8.06. Repayment to Company............................................................................. 71 Section 8.07. Reinstatement.................................................................................... 72 ARTICLE 9 AMENDMENT, SUPPLEMENT AND WAIVER Section 9.01. Without Consent of Holders of Notes.............................................................. 72 iii

Section 9.02. With Consent of Holders of Notes.............................................................. 73 Section 9.03. Compliance with Trust Indenture Act........................................................... 74 Section 9.04. Revocation and Effect of Consents............................................................. 74 Section 9.05. Notation on or Exchange of Notes.............................................................. 74 Section 9.06. Trustee to Sign Amendments, etc............................................................... 75 ARTICLE 10 NOTE GUARANTEES Section 10.01. Guarantee..................................................................................... 75 Section 10.02. Limitation on Guarantor Liability............................................................. 76 Section 10.03. Execution and Delivery of Note Guarantee...................................................... 76 Section 10.04. Guarantors May Consolidate, etc., on Certain Terms............................................ 77 Section 10.05. Releases Following Sale of Assets............................................................. 77 ARTICLE 11 MISCELLANEOUS Section 11.01. Trust Indenture Act Controls.................................................................. 78 Section 11.02. Notices....................................................................................... 78 Section 11.03. Communication by Holders of Notes with Other Holders of Notes................................. 79 Section 11.04. Certificate and Opinion as to Conditions Precedent............................................ 79 Section 11.05. Statements Required in Certificate or Opinion................................................. 79 Section 11.06. Rules by Trustee and Agents................................................................... 80 Section 11.07. No Personal Liability of Directors, Officers, Employees and Stockholders...................... 80 Section 11.08. Governing Law................................................................................. 80 Section 11.09. No Adverse Interpretation of Other Agreements................................................. 80 Section 11.10. Successors.................................................................................... 80 Section 11.11. Severability.................................................................................. 81 Section 11.12. Counterpart Originals......................................................................... 81 Section 11.13. Table of Contents, Headings, etc.............................................................. 81 iv

EXHIBITS Exhibit A FORM OF NOTE Exhibit B FORM OF CERTIFICATE OF TRANSFER Exhibit C FORM OF CERTIFICATE OF EXCHANGE Exhibit D FORM OF CERTIFICATE FROM ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR Exhibit E FORM OF SUPPLEMENTAL INDENTURE TO BE DELIVERED BY SUBSEQUENT GUARANTORS Exhibit F FORM OF NOTATION OF GUARANTEE v

INDENTURE dated as of May 16, 2001 between Crown Castle International Corp., a Delaware corporation (the "Company"), and The Bank of New York, a New York banking corporation, as trustee (the "Trustee"). The Company and the Trustee agree as follows for the benefit of each other and for the equal and ratable benefit of the Holders of the 9 3/8% Senior Notes due 2011 (each, a "Note", and, collectively, the "Notes"): ARTICLE 1 DEFINITIONS AND INCORPORATION BY REFERENCE Section 1.01. Definitions. "10-3/8% Senior Discount Notes" means the Company's 10-3/8% Senior Discount Notes due 2011. "144A Global Note" means a global note substantially in the form of Exhibit A hereto bearing the Global Note Legend and the Private Placement Legend and deposited with or on behalf of, and registered in the name of, the Depositary or its nominee that will be issued in a denomination equal to the outstanding principal amount of the Notes sold in reliance on Rule 144A. "Acquired Debt" means, with respect to any specified Person: (1) Indebtedness of any other Person existing at the time such other Person is merged with or into or became a Subsidiary of such specified Person, including, without limitation, Indebtedness incurred in connection with, or in contemplation of, such other Person merging with or into or becoming a Subsidiary of such specified Person; and (2) Indebtedness secured by a Lien encumbering any asset acquired by such specified Person. "Additional Notes" means up to $100.00 million in aggregate principal amount of Notes issued under this Indenture, in accordance with Sections 2.02 and 4.09 hereof. "Adjusted Consolidated Cash Flow" means, as of any date of determination, the sum of: (1) the Consolidated Cash Flow of the Company for the four most recent full fiscal quarters ending immediately prior to such date for which internal financial statements are available, less the Company's Tower Cash Flow for such four-quarter period; plus (2) the product of four times the Company's Tower Cash Flow for the most recent fiscal quarter for which internal financial statements are available. For purposes of making the computation referred to above: (1) acquisitions that have been made by the Company or any of its Restricted Subsidiaries, including through mergers or consolidations and including any related financing transactions, during the reference period or subsequent to such reference period and on 1

or prior to the calculation date shall be deemed to have occurred on the first day of the reference period and Consolidated Cash Flow for such reference period shall be calculated without giving effect to clause (2) of the proviso set forth in the definition of Consolidated Net Income; (2) the Consolidated Cash Flow attributable to discontinued operations, as determined in accordance with GAAP, and operations or businesses disposed of prior to the calculation date, shall be excluded; and (3) the corporate development expense of the Company and its Restricted Subsidiaries calculated in a manner consistent with the audited financial statements of the Company included in the Offering Memorandum shall be added to Consolidated Cash Flow to the extent it was included in computing Consolidated Net Income. "Affiliate" of any specified Person means any other Person directly or indirectly controlling or controlled by or under direct or indirect common control with such specified Person. For purposes of this definition, "control" (including, with correlative meanings, the terms "controlling," "controlled by" and "under common control with"), as used with respect to any Person, shall mean the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of such Person, whether through the ownership of voting securities, by agreement or otherwise; provided that beneficial ownership of 10% or more of the Voting Stock of a Person shall be deemed to be control. "Agent" means any Registrar, Paying Agent or co-registrar. "Applicable Procedures" means, with respect to any transfer or exchange of or for beneficial interests in any Global Note, the rules and procedures of the Depositary, Euroclear and Clearstream that apply to such transfer or exchange. "Asset Sale" means: (1) the sale, lease, conveyance or other disposition of any assets or rights (including, without limitation, by way of a sale and leaseback); provided that the sale, lease, conveyance or other disposition of all or substantially all of the assets of the Company and its Subsidiaries taken as a whole will be governed by the Section 4.15 and Article 5 hereof and not by Section 4.10 hereof; and (2) the issue or sale by the Company or any of its Restricted Subsidiaries of Equity Interests of any of the Company's Subsidiaries (other than directors' qualifying shares or shares required by applicable law to be held by a Person other than the Company or a Restricted Subsidiary), in the case of either clause (1) or (2), whether in a single transaction or a series of related transactions: (a) that have a fair market value in excess of $1.0 million; or (b) for net proceeds in excess of $1.0 million. Notwithstanding the foregoing, the following items shall not be deemed to be Asset Sales: 2

(1) a transfer of assets by the Company to a Restricted Subsidiary or by a Restricted Subsidiary to the Company or to another Restricted Subsidiary; (2) an issuance of Equity Interests by a Subsidiary to the Company or to another Restricted Subsidiary; (3) a transfer or issuance of Equity Interests of an Unrestricted Subsidiary to an Unrestricted Subsidiary; provided, however, that such transfer or issuance does not result in a decrease in the percentage of ownership of the voting securities of such transferee Unrestricted Subsidiary that are collectively held by the Company and its Subsidiaries; (4) a Restricted Payment that is permitted by Section 4.07 hereof; (5) grants of leases or licenses in the ordinary course of business; and (6) disposals of Cash Equivalents. "Attributable Debt" in respect of a sale and leaseback transaction means, at the time of determination, the present value (discounted at the rate of interest implicit in such transaction, determined in accordance with GAAP) of the obligation of the lessee for net rental payments during the remaining term of the lease included in such sale and leaseback transaction (including any period for which such lease has been extended or may, at the option of the lessor, be extended). "August 1999 Senior Note Indenture" means that certain indenture dated as of August 3, 1999 between the Company and the United States Trust Company of New York, as Trustee, governing the Company's 9 1/2% Senior Notes due 2011. "Bankruptcy Law" means Title 11, U.S. Code or any similar federal or state law for the relief of debtors. "Board of Directors" means the Board of Directors of the Company, or any authorized committee of the Board of Directors. "Broker-Dealer" means any broker or dealer registered under the Exchange Act. "Business Day" means any day other than a Legal Holiday. "Capital Lease Obligation" means, at the time any determination thereof is to be made, the amount of the liability in respect of a capital lease that would at such time be required to be capitalized on a balance sheet in accordance with GAAP. "Capital Stock" means: (1) in the case of a corporation, corporate stock; (2) in the case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock; 3

(3) in the case of a partnership or limited liability company, partnership or membership interests (whether general or limited); and (4) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or distributions of assets of, the issuing Person. "Cash Equivalents" means: (1) United States dollars; (2) securities issued or directly and fully guaranteed or insured by the United States government or any agency or instrumentality thereof (provided that the full faith and credit of the United States is pledged in support thereof) having maturities of not more than six months from the date of acquisition; (3) certificates of deposit and eurodollar time deposits with maturities of six months or less from the date of acquisition, bankers' acceptances with maturities not exceeding six months and overnight bank deposits, in each case with any lender party to the Senior Credit Facility or with any domestic commercial bank having capital and surplus in excess of $500.0 million and a Thompson Bank Watch Rating of "B" or better; (4) repurchase obligations with a term of not more than seven days for underlying securities of the types described in clauses (2) and (3) above entered into with any financial institution meeting the qualifications specified in clause (3) above; (5) commercial paper having the highest rating obtainable from Moody's Investors Service, Inc. or Standard & Poor's Ratings Group and in each case maturing within six months after the date of acquisition; and (6) money market funds at least 95% of the assets of which constitute Cash Equivalents of the kinds described in clauses (1)-(5) of this definition. "CCAIC" means CCA Investment Corp., which is an indirect wholly owned Subsidiary of the Company and was formed to hold the Company's Equity Interests in Crown Atlantic Holding Company LLC. "Change of Control" means the occurrence of any of the following: (1) the sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related transactions, of all or substantially all of the assets of the Company and its Restricted Subsidiaries, taken as a whole to any "person" (as such term is used in Section 13(d)(3) of the Exchange Act) other than a Principal or a Related Party of a Principal; (2) the adoption of a plan relating to the liquidation or dissolution of the Company; (3) the consummation of any transaction (including, without limitation, any merger or consolidation) the result of which is that any "person" (as defined above), other than the Principals and their Related Parties, becomes the "beneficial owner" (as such term is 4

defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that a person shall be deemed to have "beneficial ownership" of all securities that such person has the right to acquire, whether such right is currently exercisable or is exercisable only upon the occurrence of a subsequent condition), directly or indirectly, of more than 50% of the Voting Stock of the Company (measured by voting power rather than number of shares); provided that transfers of Equity Interests in the Company between or among the beneficial owners of the Company's Equity Interests and/or Equity Interests in CTSH, in each case as of the date hereof, will not be deemed to cause a Change of Control under this clause (3) so long as no single Person together with its Affiliates acquires a beneficial interest in more of the Voting Stock of the Company than is at the time collectively beneficially owned by the Principals and their Related Parties; (4) the first day on which a majority of the members of the Board of Directors are not Continuing Directors; or (5) the Company consolidates with, or merges with or into, any Person, or any Person consolidates with, or merges with or into, the Company, in any such event pursuant to a transaction in which any of the outstanding Voting Stock of the Company is converted into or exchanged for cash, securities or other property, other than any such transaction where: (a) the Voting Stock of the Company outstanding immediately prior to such transaction is converted into or exchanged for Voting Stock (other than Disqualified Stock) of the surviving or transferee Person constituting a majority of the outstanding shares of such Voting Stock of such surviving or transferee Person (immediately after giving effect to such issuance); or (b) the Principals and their Related Parties own a majority of such outstanding shares after such transaction. "Clearstream" means Clearstream Banking S.A. "Company" means Crown Castle International Corp., and any and all successors thereto. "Completed Tower" means any wireless transmission tower owned or managed by the Company or any of its Restricted Subsidiaries that, as of any date of determination: (1) has at least one wireless communications or broadcast tenant that has executed a definitive lease with the Company or any of its Restricted Subsidiaries, which lease is producing revenue with respect to the tower as of the date of determination; and (2) has capacity for at least two tenants in addition to the tenant referred to in clause (1) of this definition. 5

"Consolidated Cash Flow" means, with respect to any Person for any period, the Consolidated Net Income of such Person for such period; plus (1) provision for taxes based on income or profits of such Person and its Restricted Subsidiaries for such period, to the extent that such provision for taxes was included in computing such Consolidated Net Income; plus (2) consolidated interest expense of such Person and its Restricted Subsidiaries for such period, whether paid or accrued and whether or not capitalized (including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments, the interest component of any deferred payment obligations, the interest component of all payments associated with Capital Lease Obligations, commissions, discounts and other fees and charges incurred in respect of letters of credit or bankers' acceptance financings, and net payments (if any) pursuant to Hedging Obligations), to the extent that any such expense was deducted in computing such Consolidated Net Income; plus (3) depreciation, amortization (including amortization of goodwill and other intangibles and other non-cash expenses (excluding any such non-cash expense to the extent that it represents an accrual of or reserve for cash expenses in any future period) of such Person and its Restricted Subsidiaries for such period to the extent that such depreciation, amortization and other non-cash expenses were deducted in computing such Consolidated Net Income; minus (4) non-cash items increasing such Consolidated Net Income for such period (excluding any items that were accrued in the ordinary course of business), in each case on a consolidated basis and determined in accordance with GAAP. "Consolidated Indebtedness" means, with respect to any Person as of any date of determination, the sum, without duplication, of (1) the total amount of Indebtedness of such Person and its Restricted Subsidiaries; plus (2) the total amount of Indebtedness of any other Person, to the extent that such Indebtedness has been Guaranteed by the referent Person or one or more of its Restricted Subsidiaries; plus (3) the aggregate liquidation value of all Disqualified Stock of such Person and all preferred stock of Restricted Subsidiaries of such Person, in each case, determined on a consolidated basis in accordance with GAAP. "Consolidated Interest Expense" means, with respect to any Person for any period: (1) the consolidated interest expense of such Person and its Restricted Subsidiaries for such period determined in accordance with GAAP, whether paid or accrued and whether or not capitalized (including, without limitation, amortization of debt issuance costs and original issue discount, non-cash interest payments, the interest component of any deferred payment obligations, the interest component of all payments associated with 6

Capital Lease Obligations, imputed interest with respect to Attributable Debt, commissions, discounts and other fees and charges incurred in respect of letter of credit or bankers' acceptance financings, and net payments, if any, pursuant to Hedging Obligations); plus (2) all preferred stock dividends paid or accrued in respect of the Company's and its Restricted Subsidiaries' preferred stock to Persons other than the Company or a Wholly Owned Restricted Subsidiary of the Company other than preferred stock dividends paid by the Company in shares of preferred stock that is not Disqualified Stock. "Consolidated Net Income" means, with respect to any Person for any period, the aggregate of the Net Income of such Person and its Restricted Subsidiaries for such period, on a consolidated basis, determined in accordance with GAAP; provided that (1) the Net Income (but not loss) of any Person other than the Company that is not a Restricted Subsidiary or that is accounted for by the equity method of accounting shall be included only to the extent of the amount of dividends or distributions paid in cash to the referent Person or a Restricted Subsidiary thereof; (2) the Net Income of any Person acquired in a pooling of interests transaction for any period prior to the date of such acquisition shall be excluded; (3) the cumulative effect of a change in accounting principles shall be excluded; and (4) the Net Income (but not loss) of any Unrestricted Subsidiary shall be excluded whether or not distributed to the Company or one of its Restricted Subsidiaries. "Consolidated Tangible Assets" means, with respect to the Company, the total consolidated assets of the Company and its Restricted Subsidiaries, less the total intangible assets of the Company and its Restricted Subsidiaries, as shown on the most recent internal consolidated balance sheet of the Company and such Restricted Subsidiaries calculated on a consolidated basis in accordance with GAAP. "Continuing Directors" means, as of any date of determination, any member of the Board of Directors who: (1) was a member of such Board of Directors on the date of the August 1999 Senior Note Indenture; (2) was nominated for election or elected to such Board of Directors with the approval of a majority of the Continuing Directors who were members of such Board of Directors at the time of such nomination or election; or (3) is a designee of a Principal or was nominated by a Principal. "Corporate Trust Office of the Trustee" shall be at the address of the Trustee specified in Section 11.02 hereof or such other address as to which the Trustee may give notice to the Company. "Credit Facilities" means one or more debt facilities (including, without limitation, the Senior Credit Facility) or commercial paper facilities with banks or other institutional lenders providing for 7

revolving credit loans, term loans, receivables financing (including through the sale of receivables to such lenders or to special purpose entities formed to borrow from such lenders against such receivables) or letters of credit, in each case, as amended, restated, modified, renewed, refunded, replaced or refinanced in whole or in part from time to time. "CTI" means Crown Castle UK Limited, formerly known as Castle Transmission International Limited. "CTSH" means Crown Castle UK Holdings Limited, formerly known as Crown Transmission Services (Holdings) Ltd, and its successors. "Custodian" means the Trustee, as Custodian with respect to the Notes in global form, or any successor entity thereto. "Debt to Adjusted Consolidated Cash Flow Ratio" means, as of any date of determination, the ratio of: (1) the Consolidated Indebtedness of the Company as of such date to (2) the Adjusted Consolidated Cash Flow of the Company as of such date. "Default" means any event that is, or with the passage of time or the giving of notice or both would be, an Event of Default. "Definitive Note" means a certificated Note registered in the name of the Holder thereof and issued in accordance with Section 2.06 hereof, substantially in the form of Exhibit A hereto except that such Note shall not bear the Global Note Legend and shall not have the "Schedule of Exchanges of Interests in the Global Note" attached thereto. "Depositary" means, with respect to the Notes issuable or issued in whole or in part in global form, the Person specified in Section 2.03 hereof as the Depositary with respect to the Notes, and any and all successors thereto appointed as depositary hereunder and having become such pursuant to the applicable provision of this Indenture. "Disqualified Stock" means any Capital Stock that, by its terms (or by the terms of any security into which it is convertible or for which it is exchangeable, in each case, at the option of the holder thereof), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or redeemable at the option of the holder thereof, in whole or in part, on or prior to the date that is 91 days after the date on which the Notes mature; provided, however, that any Capital Stock that would constitute Disqualified Stock solely because the holders thereof have the right to require the Company to repurchase such Capital Stock upon the occurrence of a Change of Control or an Asset Sale shall not constitute Disqualified Stock if the terms of such Capital Stock provide that the Company may not repurchase or redeem any such Capital Stock pursuant to such provisions unless such repurchase or redemption complies with Section 4.07 hereof. "Eligible Indebtedness" means any Indebtedness other than: (1) Indebtedness in the form of, or represented by, bonds or other securities or any guarantee thereof; and 8

(2) Indebtedness that is, or may be, quoted, listed or purchased and sold on any stock exchange, automated trading system or over-the- counter or other securities market (including, without prejudice to the generality of the foregoing, the market for securities eligible for resale pursuant to Rule 144A under the Securities Act). "Equity Interests" means Capital Stock and all warrants, options or other rights to acquire Capital Stock (but excluding any debt security that is convertible into, or exchangeable for, Capital Stock). "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels office, as operator of the Euroclear system. "Exchange Act" means the Securities Exchange Act of 1934, as amended. "Exchange Notes" means the Notes issued in the Exchange Offer pursuant to Section 2.06(f) hereof. "Exchange Offer" has the meaning set forth in the Registration Rights Agreement. "Exchange Offer Registration Statement" has the meaning set forth in the Registration Rights Agreement. "Existing Indebtedness" means Indebtedness of the Company and its Subsidiaries (other than Indebtedness under the Senior Credit Facility) in existence on August 3, 1999, until such amounts are repaid. "GAAP" means generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other entity as have been approved by a significant segment of the accounting profession, which are in effect on the date hereof. "Global Note Legend" means the legend set forth in Section 2.06(g)(ii), which is required to be placed on all Global Notes issued under this Indenture. "Global Notes" means, individually and collectively, each of the Restricted Global Notes and the Unrestricted Global Notes, substantially in the form of Exhibit A hereto issued in accordance with Section 2.01, 2.06(b)(iv), 2.06(d)(ii) or 2.06(f) hereof. "Governance Agreement" means the agreement among the Company, TdF and its affiliates, dated as of August 21, 1998, to provide for certain rights and obligations of the Company, TdF and its affiliates with respect to the management of the Company. "Government Securities" means direct obligations of, or obligations guaranteed by, the United States of America, and the payment for which the United States pledges its full faith and credit. "Guarantee" means a guarantee (other than by endorsement of negotiable instruments for collection in the ordinary course of business), direct or indirect, in any manner (including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in 9

respect thereof), of all or any part of any Indebtedness. The term "Guarantor" shall mean any Person Guaranteeing any obligation. "Hedging Obligations" means, with respect to any Person, the obligations of such Person under: (1) interest rate swap agreements, interest rate cap agreements and interest rate collar agreements; and (2) other agreements or arrangements designed to protect such Person against fluctuations in interest rates or currency exchange rates. "Holder" means a Person in whose name a Note is registered. "IAI Global Note" means the Global Note substantially in the form of Exhibit A hereto bearing the Global Note Legend and the Private Placement Legend and deposited with or on behalf of and registered in the name of the Depositary or its nominee that will be issued in a denomination equal to the outstanding principal amount of the Notes sold to Institutional Accredited Investors. "Indebtedness" means, with respect to any Person, any indebtedness of such Person, whether or not contingent, in respect of borrowed money or evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in respect thereof) or banker's acceptances or representing Capital Lease Obligations or the balance deferred and unpaid of the purchase price of any property or representing any Hedging Obligations, except any such balance that constitutes an accrued expense or trade payable, if and to the extent any of the foregoing indebtedness (other than letters of credit and Hedging Obligations) would appear as a liability upon a balance sheet of such Person prepared in accordance with GAAP, as well as all Indebtedness of others secured by a Lien on any asset of such Person whether or not such Indebtedness is assumed by such Person (the amount of such Indebtedness as of any date being deemed to be the lesser of the value of such property or assets as of such date or the principal amount of such Indebtedness of such other Person so secured) and, to the extent not otherwise included, the Guarantee by such Person of any Indebtedness of any other Person. The amount of any Indebtedness outstanding as of any date shall be: (1) the accreted value thereof, in the case of any Indebtedness issued with original issue discount; and (2) the principal amount thereof, together with any interest thereon that is more than 30 days past due, in the case of any other Indebtedness. "Indenture" means this Indenture, as amended or supplemented from time to time. "Indirect Participant" means a Person who holds a beneficial interest in a Global Note through a Participant. "Initial Notes" means the first $450 million aggregate principal amount of Notes issued under this Indenture on the date hereof. "Initial Purchasers" means J.P. Morgan Securities Inc., Goldman, Sachs & Co., Credit Suisse First Boston Corporation, Lehman Brothers Inc., Morgan Stanley & Co. Incorporated, BNY Capital 10

Markets, Inc., Scotia Capital (USA) Inc., and The Royal Bank of Scotland plc, as purchasers of the Notes from the Company pursuant to the Purchase Agreement. "Institutional Accredited Investor" means an institution that is an "accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) under the Securities Act, who are not also QIBs. "Investments" means, with respect to any Person, all investments by such Person in other Persons (including Affiliates) in the forms of direct or indirect loans (including guarantees of Indebtedness or other obligations), advances or capital contributions (excluding commission, travel and similar advances to officers and employees made in the ordinary course of business), purchases or other acquisitions for consideration of Indebtedness, Equity Interests or other securities, together with all items that are or would be classified as investments on a balance sheet prepared in accordance with GAAP. If the Company or any Restricted Subsidiary of the Company sells or otherwise disposes of any Equity Interests of any direct or indirect Subsidiary of the Company or a Restricted Subsidiary of the Company issues any of its Equity Interests such that, in each case, after giving effect to any such sale or disposition, such Person is no longer a Restricted Subsidiary of the Company, the Company shall be deemed to have made an Investment on the date of any such sale or disposition equal to the fair market value of the Equity Interests of such Subsidiary not sold or disposed of in an amount determined as provided in the final paragraph of Section 4.07 hereof. "Legal Holiday" means a Saturday, a Sunday or a day on which banking institutions in the City of New York or at a place of payment are authorized by law, regulation or executive order to remain closed. If a payment date is a Legal Holiday at a place of payment, payment may be made at that place on the next succeeding day that is not a Legal Holiday, and no interest shall accrue on such payment for the intervening period. "Lien" means, with respect to any asset, any mortgage, lien, pledge, charge, security interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law (including any conditional sale or other title retention agreement, any lease in the nature thereof, any option or other agreement to sell or give a security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction). "May 1999 Senior Discount Note Indenture" means that certain indenture, dated as of May 17, 1999, between the Company and the United States Trust Company of New York, as trustee, governing the Company's 10-3/8% Senior Discount Notes. "Net Income" means, with respect to any Person, the net income (loss) of such Person, determined in accordance with GAAP and before any reduction in respect of preferred stock dividends, excluding, however: (1) any gain or loss, together with any related provision for taxes on such gain or loss, realized in connection with: (a) any Asset Sale (including, without limitation, dispositions pursuant to sale and leaseback transactions); or 11

(b) the disposition of any securities by such Person or any of its Restricted Subsidiaries or the extinguishment of any Indebtedness of such Person or any of its Restricted Subsidiaries; and (2) any extraordinary gain or loss, together with any related provision for taxes on such extraordinary gain or loss. "Net Proceeds" means the aggregate cash proceeds received by the Company or any of its Restricted Subsidiaries in respect of any Asset Sale (including, without limitation, any cash received upon the sale or other disposition of any non-cash consideration received in any Asset Sale), net of: (1) the direct costs relating to such Asset Sale (including, without limitation, legal, accounting and investment banking fees, and sales commissions) and any relocation expenses incurred as a result thereof; (2) taxes paid or payable as a result thereof (after taking into account any available tax credits or deductions and any tax sharing arrangements); (3) amounts required to be applied to the repayment of Indebtedness (other than Indebtedness under a Credit Facility) secured by a Lien on the asset or assets that were the subject of such Asset Sale; (4) all distributions and other payments required to be made to minority interest holders in Restricted Subsidiaries as a result of such Asset Sale; (5) the deduction of appropriate amounts provided by the seller as a reserve in accordance with GAAP against any liabilities associated with the assets disposed of in such Asset Sale and retained by the Company or any Restricted Subsidiary after such Asset Sale; and (6) without duplication, any reserves that Board of Directors determines in good faith should be made in respect of the sale price of such asset or assets for post closing adjustments; provided that in the case of any reversal of any reserve referred to in clause (5) or (6) above, the amount so reversed shall be deemed to be Net Proceeds from an Asset Sale as of the date of such reversal. "Non-Recourse Debt" means Indebtedness: (1) as to which neither the Company nor any of its Restricted Subsidiaries: (a) provides credit support of any kind (including any undertaking, agreement or instrument that would constitute Indebtedness); (b) is directly or indirectly liable (as a guarantor or otherwise); or (c) constitutes the lender; (2) no default with respect to which (including any rights that the holders thereof may have to take enforcement action against an Unrestricted Subsidiary) would permit (upon 12

notice, lapse of time or both) any holder of any other Indebtedness of the Company or any of its Restricted Subsidiaries to declare a default on such other Indebtedness or cause the payment thereof to be accelerated or payable prior to its stated maturity; and (3) as to which the lenders have been notified in writing that they will not have any recourse to the stock or assets of the Company or any of its Restricted Subsidiaries (except that this clause (3) will not apply to any Indebtedness incurred by CTSH and its Subsidiaries prior to the date CTSH became a Subsidiary). "Non-U.S. Person" means a Person who is not a U.S. Person. "Notes" has the meaning assigned to it in the preamble to this Indenture. The Initial Notes and the Additional Notes shall be treated as a single class for all purposes under this Indenture. "Obligations" means any principal, interest, penalties, fees, indemnifications, reimbursements, damages and other liabilities payable under the documentation governing any Indebtedness. "Offering" means the offering of the Notes by the Company. "Offering Memorandum" means the Offering Memorandum dated May 10, 2001 relating to the offering of the Notes, including all amendments and all materials incorporated by reference in such Offering Memorandum. "Officer" means, with respect to any Person, the Chairman of the Board, the Chief Executive Officer, the President, the Chief Operating Officer, the Chief Financial Officer, the Treasurer, any Assistant Treasurer, the Controller, the Secretary or any Vice-President of such Person. "Officers' Certificate" means a certificate signed on behalf of the Company by two Officers of the Company, one of whom must be the principal executive officer, the principal financial officer, the treasurer or the principal accounting officer of the Company, that meets the requirements of Section 11.04 hereof. "Opinion of Counsel" means an opinion from legal counsel who is reasonably acceptable to the Trustee, that meets the requirements of Section 11.04 hereof. The counsel may be an employee of or counsel to the Company, any Subsidiary of the Company or the Trustee. "Participant" means, with respect to the Depositary, Euroclear or Clearstream, a Person who has an account with the Depositary, Euroclear or Clearstream, respectively (and, with respect to DTC, shall include Euroclear and Clearstream). "Permitted Business" means any business conducted by the Company, its Restricted Subsidiaries or CTSH and its Subsidiaries on the date hereof and any other business related, ancillary or complementary to any such business. "Permitted Investment" means: (1) any Investment in the Company or in a Restricted Subsidiary of the Company; (2) any Investment in Cash Equivalents; 13

(3) any Investment by the Company or any Restricted Subsidiary of the Company in a Person, if as a result of such Investment: (a) such Person becomes a Restricted Subsidiary of the Company; or (b) such Person is merged, consolidated or amalgamated with or into, or transfers or conveys substantially all of its assets to, or is liquidated into, the Company or a Restricted Subsidiary of the Company; (4) any Restricted Investment made as a result of the receipt of non-cash consideration from an Asset Sale that was made pursuant to and in compliance with Section 4.10 hereof; (5) any acquisition of assets solely in exchange for the issuance of Equity Interests (other than Disqualified Stock) of the Company; (6) receivables created in the ordinary course of business; (7) loans or advances to employees made in the ordinary course of business since the date of the August 1999 Senior Note Indenture not to exceed $2.0 million at any one time outstanding; (8) securities and other assets received in settlement of trade debts or other claims arising in the ordinary course of business; (9) purchases of additional Equity Interests in CTSH for cash pursuant to the governance agreement as the same is in effect on the date of the May 1999 Senior Discount Notes Indenture for aggregate cash consideration not to exceed $20.0 million since the beginning of the quarter during which the May 1999 Senior Discount Notes Indenture was executed; (10) Investments since the date of the August 1999 Senior Note Indenture of up to an aggregate of $100.0 million (each such Investment being measured as of the date made and without giving effect to subsequent changes in value); and (11) other Investments in Permitted Businesses since the date of the August 1999 Senior Note Indenture not to exceed an amount equal to $10.0 million plus 10% of the Company's Consolidated Tangible Assets at any one time outstanding (each such Investment being measured as of the date made and without giving effect to subsequent changes in value). "Permitted Liens" means: (1) Liens securing Eligible Indebtedness of the Company under one or more Credit Facilities that was permitted by the terms hereof to be incurred; (2) Liens securing any Indebtedness of any of the Company's Restricted Subsidiaries that was permitted by the terms hereof to be incurred; (3) Liens in favor of the Company; 14

(4) Liens existing on the date of the August 1999 Senior Note Indenture; (5) Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in good faith by appropriate proceedings promptly instituted and diligently concluded; provided that any reserve or other appropriate provision as shall be required in conformity with GAAP shall have been made therefor; (6) Liens securing Indebtedness permitted to be incurred under clause (5) of the second paragraph of Section 4.09 hereof; and (7) Liens incurred in the ordinary course of business of the Company or any Restricted Subsidiary of the Company since the date of the August 1999 Senior Note Indenture with respect to obligations that do not exceed $5.0 million at any one time outstanding and that: (a) are not incurred in connection with the borrowing of money or the obtaining of advances or credit (other than trade credit in the ordinary course of business); and (b) do not in the aggregate materially detract from the value of the property or materially impair the use thereof in the operation of business by the Company or such Restricted Subsidiary. "Permitted Refinancing Indebtedness" means any Indebtedness of the Company or any of its Restricted Subsidiaries issued in exchange for, or the net proceeds of which are used to extend, refinance, renew, replace, defease or refund, other Indebtedness of the Company or any of its Restricted Subsidiaries (other than intercompany Indebtedness); provided that: (1) the principal amount (or initial accreted value, if applicable) of such Permitted Refinancing Indebtedness does not exceed the principal amount of (or accreted value, if applicable), plus accrued interest on, the Indebtedness so extended, refinanced, renewed, replaced, defeased or refunded (plus the amount of expenses and prepayment premiums incurred in connection therewith); (2) such Permitted Refinancing Indebtedness has a final maturity date later than the final maturity date of, and has a Weighted Average Life to Maturity equal to or greater than the Weighted Average Life to Maturity of, the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded; (3) if the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded is subordinated in right of payment to the Notes, such Permitted Refinancing Indebtedness is subordinated in right of payment to the Notes on terms at least as favorable to the Holders of Notes as those contained in the documentation governing the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded; and (4) such Indebtedness is incurred either by the Company or by the Restricted Subsidiary who is the obligor on the Indebtedness being extended, refinanced, renewed, replaced, defeased or refunded. 15

"Person" means any individual, corporation, partnership, joint venture, association, joint-stock company, trust, unincorporated organization or government or agency or political subdivision thereof (including any subdivision or ongoing business of any such entity or substantially all of the assets of any such entity, subdivision or business). "Principals" means Berkshire Fund III, Limited Partnership; Berkshire Fund IV, Limited Partnership; Berkshire Investors LLC; Berkshire Partners LLC; Centennial Fund IV, L.P.; Centennial Fund V, L.P.; Centennial Entrepreneurs Fund V, L.P.; Nassau Capital Partners II, L.P.; and NAS Partners I, L.L.C. and any Related Party of the foregoing. "Private Placement Legend" means the legend set forth in Section 2.06(g)(i) to be placed on all Notes issued under this Indenture except where otherwise permitted by the provisions of this Indenture. "Public Equity Offering" means an underwritten primary public offering of common stock of the Company pursuant to an effective registration statement under the Securities Act. "Purchase Agreement" means the Purchase Agreement, dated as of May 10, 2001 between the Company and the Initial Purchasers. "QIB" means a "qualified institutional buyer" as defined in Rule 144A. "Registration Rights Agreement" means the Registration Rights Agreement, dated as of May 16, 2001, by and among the Company and the other parties named on the signature pages thereof, as such agreement may be amended, modified or supplemented from time to time and, with respect to any Additional Notes, one or more registration rights agreements between the Company and the other parties thereto, as such agreement(s) may be amended, modified or supplemented from time to time, relating to rights given by the Company to the purchasers of Additional Notes to register such Additional Notes under the Securities Act. "Regulation S" means Regulation S promulgated under the Securities Act. "Regulation S Global Note" means a global Note bearing the Private Placement Legend and deposited with or on behalf of the Depositary and registered in the name of the Depositary or its nominee, issued in a denomination equal to the outstanding principal amount of the Notes initially sold in reliance on Rule 903 of Regulation S. "Related Party" with respect to any Principal means: (1) any controlling stockholder, 80% (or more) owned Subsidiary of such Principal; or (2) any trust, corporation, partnership or other entity, the beneficiaries, stockholders, members, partners, owners or Persons beneficially holding an 80% or more controlling interest of which consist of such Principal and/or such other Persons referred to in the immediately preceding clause (1). "Responsible Officer" with respect to the Trustee, means any officer within the Corporate Trust Administration of the Trustee (or any successor group of the Trustee) or any other officer of the Trustee customarily performing functions similar to those performed by any of the above designated officers and 16

also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his knowledge of and familiarity with the particular subject. "Restricted Definitive Note" means a Definitive Note bearing the Private Placement Legend. "Restricted Global Note" means a Global Note bearing the Private Placement Legend. "Restricted Investment" means an Investment other than a Permitted Investment. "Restricted Period" means the 40-day restricted period as defined in Regulation S. "Restricted Subsidiary" of a Person means any Subsidiary of the referent Person that is not an Unrestricted Subsidiary. "Rule 144" means Rule 144 promulgated under the Securities Act. "Rule 144A" means Rule 144A promulgated under the Securities Act. "Rule 903" means Rule 903 promulgated under the Securities Act. "Rule 904" means Rule 904 promulgated the Securities Act. "SEC" means the Securities and Exchange Commission. "Securities Act" means the Securities Act of 1933, as amended. "Senior Credit Facility" means that certain Credit Agreement, dated as of March 15, 2000, by and among The Chase Manhattan Bank, Key Corporate Capital, Inc. The Bank of Nova Scotia, as agents for the several lenders, and Crown Castle Operating Company and the Company, including any related notes, guarantees, collateral documents, instruments and agreements executed in connection therewith, and in each case as amended, modified, renewed, refunded, replaced or refinanced from time to time. "Shelf Registration Statement" means the Shelf Registration Statement as defined in the Registration Rights Agreement. "Significant Subsidiary" means, with respect to any Person, any Restricted Subsidiary of such Person that would be a "significant subsidiary" of such Person as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated pursuant to the Securities Act, as such Regulation is in effect on the date hereof, except that all references to "10 percent" in Rule 1-02(w)(1), (2) and (3) shall mean "5 percent" and that all Unrestricted Subsidiaries of the Company shall be excluded from all calculations under Rule 1-02(w). "Special Interest" means all Special Interest (as defined in the Registration Rights Agreement) then owing pursuant to Section 2(c) of the Registration Rights Agreement. "Stated Maturity" means, with respect to any installment of interest or principal on any series of Indebtedness, the date on which such payment of interest or principal was scheduled to be paid in the original documentation governing such Indebtedness, and shall not include any contingent obligations to 17

repay, redeem or repurchase any such interest or principal prior to the date originally scheduled for the payment thereof. "Stockholders' Agreement" means the agreement among the Company and certain stockholders of the Company, dated as of August 21, 1998, to provide for certain rights and obligations of the Company and such stockholders with respect to the governance of the Company and such stockholders' shares of Common Stock and/or Class A Common Stock of the Company. "Strategic Equity Investment" means a cash contribution to the common equity capital of the Company or a purchase from the Company of common Equity Interests (other than Disqualified Stock), in either case by or from a Strategic Equity Investor and for aggregate cash consideration of at least $50.0 million. "Strategic Equity Investor" means a Person engaged in a Permitted Business whose Total Equity Market Capitalization exceeds $1.0 billion. "Subsidiary" means, with respect to any Person: (1) any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof is at the time owned or controlled, directly or indirectly, by such Person or one or more of the other Subsidiaries of that Person (or a combination thereof); and (2) any partnership: (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person; or (b) the only general partners of which are such Person or one or more Subsidiaries of such Person (or any combination thereof). "TdF" means TeleDiffusion de France International S.A. "TIA" means the Trust Indenture Act of 1939 (15 U.S.C. (S)(S). 77aaa-77bbbb) as in effect on the date on which this Indenture is qualified under the TIA. "Total Equity Market Capitalization" of any Person means, as of any day of determination, the sum of: (1) the product of: (a) the aggregate number of outstanding primary shares of common stock of such Person on such day (which shall not include any options or warrants on, or securities convertible or exchangeable into, shares of common stock of such person); multiplied by 18

(b) the average closing price of such common stock listed on a national securities exchange or the Nasdaq National Market System over the 20 consecutive business days immediately preceding such day; plus (2) the liquidation value of any outstanding shares of preferred stock of such Person on such day. "Tower Asset Exchange" means any transaction in which the Company or one of its Restricted Subsidiaries exchanges assets for Tower Assets and/or cash or Cash Equivalents where the fair market value (evidenced by a resolution of the Board of Directors set forth in an Officers' Certificate delivered to the Trustee) of the Tower Assets and cash or Cash Equivalents received by the Company and its Restricted Subsidiaries in such exchange is at least equal to the fair market value of the assets disposed of in such exchange. "Tower Assets" means wireless transmission towers and related assets that are located on the site of a transmission tower. "Tower Cash Flow" means, for any period, the Consolidated Cash Flow of the Company and its Restricted Subsidiaries for such period that is directly attributable to site rental revenue or license fees paid to lease or sublease space on communication sites owned or leased by the Company, all determined on a consolidated basis and in accordance with GAAP. Tower Cash Flow will not include revenue or expenses attributable to non-site rental services provided by the Company or any of its Restricted Subsidiaries to lessees of communication sites or revenues derived from the sale of assets. "Trustee" means the party named as such above until a successor replaces it in accordance with the applicable provisions of this Indenture and thereafter means the successor serving hereunder. "Unrestricted Global Note" means a permanent global Note substantially in the form of Exhibit A attached hereto that bears the Global Note Legend and that has the "Schedule of Exchanges of Interests in the Global Note" attached thereto, and that is deposited with or on behalf of and registered in the name of the Depositary, representing a series of Notes that do not bear the Private Placement Legend. "Unrestricted Definitive Note" means one or more Definitive Notes that do not bear and are not required to bear the Private Placement Legend. "Unrestricted Subsidiary" means any Subsidiary of the Company that is designated by the Board of Directors as an Unrestricted Subsidiary pursuant to a board resolution; but only to the extent that such Subsidiary: (1) has no Indebtedness other than Non-Recourse Debt; (2) is not party to any agreement, contract, arrangement or understanding with the Company or any Restricted Subsidiary of the Company unless the terms of any such agreement, contract, arrangement or understanding are no less favorable to the Company or such Restricted Subsidiary than those that might be obtained at the time from Persons who are not Affiliates of the Company; (3) is a Person with respect to which neither the Company nor any of its Restricted Subsidiaries has any direct or indirect obligation: 19

(a) to subscribe for additional Equity Interests; or (b) to maintain or preserve such Person's financial condition or to cause such Person to achieve any specified levels of operating results; (4) has not guaranteed or otherwise directly or indirectly provided credit support for any Indebtedness of the Company or any of its Restricted Subsidiaries; and (5) has at least one director on its Board of Directors that is not a director or executive officer of the Company or any of its Restricted Subsidiaries and has at least one executive officer that is not a director or executive officer of the Company or any of its Restricted Subsidiaries. Any such designation by the Board of Directors shall be evidenced to the Trustee by filing with the trustee a certified copy of the board resolution giving effect to such designation and an Officers' Certificate certifying that such designation complied with the foregoing conditions and was permitted by Section 4.07 hereof. In addition, each Subsidiary of the Company that is an "Unrestricted Subsidiary" as of the date hereof under the indentures relating to the Company's existing indebtedness shall be an "Unrestricted Subsidiary" for purposes of this Indenture. If, at any time, any Unrestricted Subsidiary would fail to meet the foregoing requirements as an Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted Subsidiary for purposes of this Indenture, and any Indebtedness of that Subsidiary shall be deemed to be incurred by a Restricted Subsidiary of the Company as of such date (and, if such Indebtedness is not permitted to be incurred as of such date under Section 4.09 hereof, the Company shall be in default of Section 4.09 hereof). The Board of Directors may at any time designate any Unrestricted Subsidiary to be a Restricted Subsidiary; provided that the designation shall be deemed to be an incurrence of Indebtedness by a Restricted Subsidiary of the Company of any outstanding Indebtedness of such Unrestricted Subsidiary and the designation shall only be permitted if (1) such Indebtedness is permitted under Section 4.09 hereof, calculated on a pro forma basis as if such designation had occurred at the beginning of the four-quarter reference period and (2) no Default would occur or be in existence following such designation. "U.S. Person" means a U.S. person as defined in Rule 902(o) under the Securities Act. "Voting Stock" of any Person as of any date means the Capital Stock of such Person that is at the time entitled to vote in the election of the board of directors of such Person. "Weighted Average Life to Maturity" means, when applied to any Indebtedness at any date, the number of years obtained by dividing: (1) the sum of the products obtained by multiplying : (a) the amount of each then remaining installment, sinking fund, serial maturity or other required payments of principal, including payment at final maturity, in respect thereof; by (b) the number of years (calculated to the nearest one- twelfth) that will elapse between such date and the making of such payment; by (2) the then outstanding principal amount of such Indebtedness. 20

"Wholly Owned Restricted Subsidiary" of any Person means a Restricted Subsidiary of such Person all of the outstanding Capital Stock or other ownership interests of which (other than directors' qualifying shares) shall at the time be owned by such Person or by one or more Wholly Owned Restricted Subsidiaries of such Person or by such Person and one or more Wholly Owned Restricted Subsidiaries of such Person. Section 1.02. Other Definitions. Defined in Term Section ---- ------- "Affiliate Transaction"............................................................ 4.11 "Asset Sale"....................................................................... 4.10 "Asset Sale Offer"................................................................. 3.09 "Authentication Order"............................................................. 2.02 "Change of Control Offer".......................................................... 4.15 "Change of Control Payment"........................................................ 4.15 "Change of Control Payment Date"................................................... 4.15 "Covenant Defeasance".............................................................. 8.03 "Event of Default"................................................................. 6.01 "Excess Proceeds".................................................................. 4.10 "incur"............................................................................ 4.09 "Legal Defeasance"................................................................. 8.02 "Offer Amount"..................................................................... 3.09 "Offer Period"..................................................................... 3.09 "Paying Agent"..................................................................... 2.03 "Payment Default".................................................................. 6.01 "Permitted Debt"................................................................... 4.09 "Purchase Date".................................................................... 3.09 "Registrar"........................................................................ 2.03 "Restricted Payments".............................................................. 4.07 Section 1.03. Incorporation by Reference of Trust Indenture Act. Whenever this Indenture refers to a provision of the TIA, the provision is incorporated by reference in and made a part of this Indenture. The following TIA terms used in this Indenture have the following meanings: "indenture securities" means the Notes; "indenture security Holder" means a Holder of a Note; "indenture to be qualified" means this Indenture; "indenture trustee" or "institutional trustee" means the Trustee; and "obligor" on the Notes means the Company and any successor obligor upon the Notes. 21

All other terms used in this Indenture that are defined by the TIA, defined by the TIA's reference to another statute or defined by SEC rule under the TIA have the meanings so assigned to them. Section 1.04. Rules of Construction. Unless the context otherwise requires: (a) a term has the meaning assigned to it; (b) an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP; (c) "or" is not exclusive; (d) words in the singular include the plural, and in the plural include the singular; (e) provisions apply to successive events and transactions; and (f) references to sections of or rules under the Securities Act shall be deemed to include substitute, replacement or successor sections or rules adopted by the SEC from time to time. ARTICLE 2 THE NOTES Section 2.01. Form and Dating. (a) General. The Notes and the Trustee's certificate of authentication shall be substantially in the form of Exhibit A hereto. The Notes may have notations, legends or endorsements required by law, stock exchange rule or usage. Each Note shall be dated the date of its authentication. The Notes shall be in denominations of $1,000 and integral multiples thereof. The terms and provisions contained in the Notes shall constitute, and are hereby expressly made, a part of this Indenture and the Company and the Trustee, by their execution and delivery of this Indenture, expressly agree to such terms and provisions and to be bound thereby. However, to the extent any provision of any Note conflicts with the express provisions of this Indenture, the provisions of this Indenture shall govern and be controlling. (b) Global Notes. Notes issued in global form shall be substantially in the form of Exhibit A attached hereto (including the Global Note Legend thereon and the "Schedule of Exchanges of Interests in the Global Note" attached thereto). Notes issued in definitive form shall be substantially in the form of Exhibit A attached hereto (but without the Global Note Legend thereon and without the "Schedule of Exchanges of Interests in the Global Note" attached thereto). Each Global Note shall represent such of the outstanding Notes as shall be specified therein and each shall provide that it shall represent the aggregate principal amount of outstanding Notes from time to time endorsed thereon and that the aggregate principal amount of outstanding Notes represented thereby may from time to time be reduced or increased, as appropriate, to reflect exchanges and redemptions. Any endorsement of a Global Note to reflect the amount of any increase or decrease in the aggregate principal amount of outstanding Notes 22

represented thereby shall be made by the Trustee or the Custodian, at the direction of the Trustee, in accordance with instructions given by the Holder thereof as required by Section 2.06 hereof. (c) Euroclear and Clearstream Procedures Applicable. The provisions of the "Operating Procedures of the Euroclear System" and "Terms and Conditions Governing Use of Euroclear" and the "General Terms and Conditions of Clearstream Bank" and "Customer Handbook" of Clearstream Bank shall be applicable to transfers of beneficial interests in Global Notes that are held by Participants through Euroclear or Clearstream Bank. Section 2.02. Execution and Authentication. Two Officers shall sign the Notes for the Company by manual or facsimile signature. If an Officer whose signature is on a Note no longer holds that office at the time a Note is authenticated, the Note shall nevertheless be valid. A Note shall not be valid until authenticated by the manual signature of the Trustee. The signature shall be conclusive evidence that the Note has been authenticated under this Indenture. The Trustee shall, upon a written order of the Company signed by two Officers (an "Authentication Order"), authenticate Notes for original issue up to the aggregate principal amount stated in paragraph 4 of the Notes. The aggregate principal amount of Notes outstanding at any time may not exceed such amount except as provided in Section 2.08 hereof. The Trustee may appoint an authenticating agent acceptable to the Company to authenticate Notes. An authenticating agent may authenticate Notes whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the same rights as an Agent to deal with Holders or an Affiliate of the Company. Section 2.03. Registrar and Paying Agent. The Company shall maintain an office or agency where Notes may be presented for registration of transfer or for exchange ("Registrar") and an office or agency where Notes may be presented for payment ("Paying Agent"). The Registrar shall keep a register of the Notes and of their transfer and exchange. The Company may appoint one or more co-registrars and one or more additional paying agents. The term "Registrar" includes any co-registrar and the term "Paying Agent" includes any additional paying agent. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company shall notify the Trustee in writing of the name and address of any Agent not a party to this Indenture. If the Company fails to appoint or maintain another entity as Registrar or Paying Agent, the Trustee shall act as such. The Company or any of its Subsidiaries may act as Paying Agent or Registrar. The Company initially appoints The Depository Trust Company ("DTC") to act as Depositary with respect to the Global Notes. The Company initially appoints the Trustee to act as the Registrar and Paying Agent and to act as Custodian with respect to the Global Notes. 23

Section 2.04. Paying Agent to Hold Money in Trust. The Company shall require each Paying Agent other than the Trustee to agree in writing that the Paying Agent will hold in trust for the benefit of the Holders or the Trustee all money held by the Paying Agent for the payment of principal of, or premium, if any, or interest on the Notes, and will notify the Trustee of any default by the Company in making any such payment. While any such default continues, the Trustee may require a Paying Agent to pay all money held by it to the Trustee. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee. Upon payment over to the Trustee, the Paying Agent (if other than the Company or a Subsidiary) shall have no further liability for the money. If the Company or a Subsidiary acts as Paying Agent, it shall segregate and hold in a separate trust fund for the benefit of the Holders all money held by it as Paying Agent. Upon any bankruptcy or reorganization proceedings relating to the Company, the Trustee shall serve as Paying Agent for the Notes. Section 2.05. Holder Lists. The Trustee shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of all Holders and shall otherwise comply with TIA (S). 312(a). If the Trustee is not the Registrar, the Company shall furnish to the Trustee at least seven Business Days before each interest payment date and at such other times as the Trustee may request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of the Holders of Notes, and the Company shall otherwise comply with TIA (S). 312(a). Section 2.06. Transfer and Exchange. (a) Transfer and Exchange of Global Notes. A Global Note may not be transferred as a whole except by the Depositary to a nominee of the Depositary, by a nominee of the Depositary to the Depositary or to another nominee of the Depositary, or by the Depositary or any such nominee to a successor Depositary or a nominee of such successor Depositary. All Global Notes will be exchanged by the Company for Definitive Notes if (i) the Company delivers to the Trustee notice from the Depositary that it is unwilling or unable to continue to act as Depositary or that it is no longer a clearing agency registered under the Exchange Act and, in either case, a successor Depositary is not appointed by the Company within 120 days after the date of such notice from the Depositary or (ii) the Company in its sole discretion determines that the Global Notes (in whole but not in part) should be exchanged for Definitive Notes and delivers a written notice to such effect to the Trustee. Upon the occurrence of either of the preceding events in (i) or (ii) above, Definitive Notes shall be issued in such names as the Depositary shall instruct the Trustee. Global Notes also may be exchanged or replaced, in whole or in part, as provided in Sections 2.07 and 2.10 hereof. Every Note authenticated and delivered in exchange for, or in lieu of, a Global Note or any portion thereof, pursuant to this Section 2.06, or Section 2.07 or 2.10 hereof, shall be authenticated and delivered in the form of, and shall be, a Global Note. A Global Note may not be exchanged for another Note other than as provided in this Section 2.06(a); however, beneficial interests in a Global Note may be transferred and exchanged as provided in Section 2.06(b), (c) or (f) hereof. (b) Transfer and Exchange of Beneficial Interests in the Global Notes. The transfer and exchange of beneficial interests in the Global Notes shall be effected through the Depositary, in accordance with the provisions of this Indenture and the Applicable Procedures. Beneficial interests in the Restricted Global Notes shall be subject to restrictions on transfer comparable to those set forth 24

herein to the extent required by the Securities Act. Transfers of beneficial interests in the Global Notes also shall require compliance with either subparagraph (i) or (ii) below, as applicable, as well as one or more of the other following subparagraphs, as applicable: (i) Transfer of Beneficial Interests in the Same Global Note. Beneficial interests in any Restricted Global Note may be transferred to Persons who take delivery thereof in the form of a beneficial interest in the same Restricted Global Note in accordance with the transfer restrictions set forth in the Private Placement Legend; provided, however, that prior to the expiration of the Restricted Period, transfers of beneficial interests in the Regulation S Global Note may not be made to a U.S. Person or for the account or benefit of a U.S. Person (other than an Initial Purchaser). Beneficial interests in any Unrestricted Global Note may be transferred to Persons who take delivery thereof in the form of a beneficial interest in an Unrestricted Global Note. No written orders or instructions shall be required to be delivered to the Registrar to effect the transfers described in this Section 2.06(b)(i). (ii) All Other Transfers and Exchanges of Beneficial Interests in Global Notes. In connection with all transfers and exchanges of beneficial interests that are not subject to Section 2.06(b)(i) above, the transferor of such beneficial interest must deliver to the Registrar either (A) (1) a written order from a Participant or an Indirect Participant given to the Depositary in accordance with the Applicable Procedures directing the Depositary to credit or cause to be credited a beneficial interest in another Global Note in an amount equal to the beneficial interest to be transferred or exchanged and (2) instructions given in accordance with the Applicable Procedures containing information regarding the Participant account to be credited with such increase or (B) (1) a written order from a Participant or an Indirect Participant given to the Depositary in accordance with the Applicable Procedures directing the Depositary to cause to be issued a Definitive Note in an amount equal to the beneficial interest to be transferred or exchanged and (2) instructions given by the Depositary to the Registrar containing information regarding the Person in whose name such Definitive Note shall be registered to effect the transfer or exchange referred to in (1) above. Upon consummation of an Exchange Offer by the Company in accordance with Section 2.06(f) hereof, the requirements of this Section 2.06(b)(ii) shall be deemed to have been satisfied upon receipt by the Registrar of the instructions contained in the Letter of Transmittal delivered by the Holder of such beneficial interests in the Restricted Global Notes. Upon satisfaction of all of the requirements for transfer or exchange of beneficial interests in Global Notes contained in this Indenture and the Notes or otherwise applicable under the Securities Act, the Trustee shall adjust the principal amount of the relevant Global Note(s) pursuant to Section 2.06(g) hereof. (iii) Transfer of Beneficial Interests to Another Restricted Global Note. A beneficial interest in any Restricted Global Note may be transferred to a Person who takes delivery thereof in the form of a beneficial interest in another Restricted Global Note if the transfer complies with the requirements of Section 2.06(b)(ii) above and the Registrar receives the following: (A) if the transferee will take delivery in the form of a beneficial interest in the 144A Global Note, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications in item (1) thereof; 25

(B) if the transferee will take delivery in the form of a beneficial interest in the Regulation S Global Note, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications in item (2) thereof; and (C) if the transferee will take delivery in the form of a beneficial interest in the IAI Global Note, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications and certificates and Opinion of Counsel required by item (3) thereof, if applicable. (iv) Transfer and Exchange of Beneficial Interests in a Restricted Global Note for Beneficial Interests in the Unrestricted Global Note. A beneficial interest in any Restricted Global Note may be exchanged by any holder thereof for a beneficial interest in an Unrestricted Global Note or transferred to a Person who takes delivery thereof in the form of a beneficial interest in an Unrestricted Global Note if the exchange or transfer complies with the requirements of Section 2.06(b)(ii) above and: (A) such exchange or transfer is effected pursuant to the Exchange Offer in accordance with the Registration Rights Agreement and the holder of the beneficial interest to be transferred, in the case of an exchange, or the transferee, in the case of a transfer, certifies in the applicable Letter of Transmittal that it is not (1) a broker-dealer, (2) a Person participating in the distribution of the Exchange Notes or (3) a Person who is an affiliate (as defined in Rule 144) of the Company; (B) such transfer is effected pursuant to the Shelf Registration Statement in accordance with the Registration Rights Agreement; (C) such transfer is effected by a Broker-Dealer pursuant to the Exchange Offer Registration Statement in accordance with the Registration Rights Agreement; or (D) the Registrar receives the following: (1) if the holder of such beneficial interest in a Restricted Global Note proposes to exchange such beneficial interest for a beneficial interest in an Unrestricted Global Note, a certificate from such holder in the form of Exhibit C hereto, including the certifications in item (1)(a) thereof; or (2) if the holder of such beneficial interest in a Restricted Global Note proposes to transfer such beneficial interest to a Person who shall take delivery thereof in the form of a beneficial interest in an Unrestricted Global Note, a certificate from such holder in the form of Exhibit B hereto, including the certifications in item (4) thereof; and, in each such case set forth in this subparagraph (D), if the Registrar so requests or if the Applicable Procedures so require, an Opinion of Counsel in form reasonably acceptable to the Registrar to the effect that such exchange or transfer is in compliance with the Securities Act and that the restrictions on transfer contained herein and in the 26

Private Placement Legend are no longer required in order to maintain compliance with the Securities Act. If any such transfer is effected pursuant to subparagraph (B) or (D) above at a time when an Unrestricted Global Note has not yet been issued, the Company shall issue and, upon receipt of an Authentication Order in accordance with Section 2.02 hereof, the Trustee shall authenticate one or more Unrestricted Global Notes in an aggregate principal amount equal to the aggregate principal amount of beneficial interests transferred pursuant to subparagraph (B) or (D) above. Beneficial interests in an Unrestricted Global Note cannot be exchanged for, or transferred to Persons who take delivery thereof in the form of, a beneficial interest in a Restricted Global Note. (c) Transfer or Exchange of Beneficial Interests for Definitive Notes. (i) Beneficial Interests in Restricted Global Notes to Restricted Definitive Notes. If any holder of a beneficial interest in a Restricted Global Note proposes to exchange such beneficial interest for a Restricted Definitive Note or to transfer such beneficial interest to a Person who takes delivery thereof in the form of a Restricted Definitive Note, then, upon receipt by the Registrar of the following documentation: (A) if the holder of such beneficial interest in a Restricted Global Note proposes to exchange such beneficial interest for a Restricted Definitive Note, a certificate from such holder in the form of Exhibit C hereto, including the certifications in item (2)(a) thereof; (B) if such beneficial interest is being transferred to a QIB in accordance with Rule 144A under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (1) thereof; (C) if such beneficial interest is being transferred to a Non-U.S. Person in an offshore transaction in accordance with Rule 903 or Rule 904 under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (2) thereof; (D) if such beneficial interest is being transferred pursuant to an exemption from the registration requirements of the Securities Act in accordance with Rule 144 under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(a) thereof; (E) if such beneficial interest is being transferred to an Institutional Accredited Investor in reliance on an exemption from the registration requirements of the Securities Act other than those listed in subparagraphs (B) through (D) above, a certificate to the effect set forth in Exhibit B hereto, including the certifications, certificates and Opinion of Counsel required by item (3) thereof, if applicable; 27

(F) if such beneficial interest is being transferred to the Company or any of its Subsidiaries, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(b) thereof; or (G) if such beneficial interest is being transferred pursuant to an effective registration statement under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(c) thereof, the Trustee shall cause the aggregate principal amount of the applicable Global Note to be reduced accordingly pursuant to Section 2.06(h) hereof, and the Company shall execute and the Trustee shall authenticate and deliver to the Person designated in the instructions a Definitive Note in the appropriate principal amount. Any Definitive Note issued in exchange for a beneficial interest in a Restricted Global Note pursuant to this Section 2.06(c) shall be registered in such name or names and in such authorized denomination or denominations as the holder of such beneficial interest shall instruct the Registrar through instructions from the Depositary and the Participant or Indirect Participant. The Trustee shall deliver such Definitive Notes to the Persons in whose names such Notes are so registered. Any Definitive Note issued in exchange for a beneficial interest in a Restricted Global Note pursuant to this Section 2.06(c)(i) shall bear the Private Placement Legend and shall be subject to all restrictions on transfer contained therein. (ii) Beneficial Interests in Restricted Global Notes to Unrestricted Definitive Notes. A holder of a beneficial interest in a Restricted Global Note may exchange such beneficial interest for an Unrestricted Definitive Note or may transfer such beneficial interest to a Person who takes delivery thereof in the form of an Unrestricted Definitive Note only if: (A) such exchange or transfer is effected pursuant to the Exchange Offer in accordance with the Registration Rights Agreement and the holder of such beneficial interest, in the case of an exchange, or the transferee, in the case of a transfer, certifies in the applicable Letter of Transmittal that it is not (1) a broker-dealer, (2) a Person participating in the distribution of the Exchange Notes or (3) a Person who is an affiliate (as defined in Rule 144) of the Company; (B) such transfer is effected pursuant to the Shelf Registration Statement in accordance with the Registration Rights Agreement; (C) such transfer is effected by a Broker-Dealer pursuant to the Exchange Offer Registration Statement in accordance with the Registration Rights Agreement; or (D) the Registrar receives the following: (1) if the holder of such beneficial interest in a Restricted Global Note proposes to exchange such beneficial interest for a Definitive Note that does not bear the Private Placement Legend, a certificate from such holder in the form of Exhibit C hereto, including the certifications in item (1)(b) thereof; or 28

(2) if the holder of such beneficial interest in a Restricted Global Note proposes to transfer such beneficial interest to a Person who shall take delivery thereof in the form of a Definitive Note that does not bear the Private Placement Legend, a certificate from such holder in the form of Exhibit B hereto, including the certifications in item (4) thereof; and, in each such case set forth in this subparagraph (D), if the Registrar so requests or if the Applicable Procedures so require, an Opinion of Counsel in form reasonably acceptable to the Registrar to the effect that such exchange or transfer is in compliance with the Securities Act and that the restrictions on transfer contained herein and in the Private Placement Legend are no longer required in order to maintain compliance with the Securities Act. (iii) Beneficial Interests in Unrestricted Global Notes to Unrestricted Definitive Notes. If any holder of a beneficial interest in an Unrestricted Global Note proposes to exchange such beneficial interest for a Definitive Note or to transfer such beneficial interest to a Person who takes delivery thereof in the form of a Definitive Note, then, upon satisfaction of the conditions set forth in Section 2.06(b)(ii) hereof, the Trustee shall cause the aggregate principal amount of the applicable Global Note to be reduced accordingly pursuant to Section 2.06(h) hereof, and the Company shall execute and the Trustee shall authenticate and deliver to the Person designated in the instructions a Definitive Note in the appropriate principal amount. Any Definitive Note issued in exchange for a beneficial interest pursuant to this Section 2.06(c)(iii) shall be registered in such name or names and in such authorized denomination or denominations as the holder of such beneficial interest shall instruct the Registrar through instructions from the Depositary and the Participant or Indirect Participant. The Trustee shall deliver such Definitive Notes to the Persons in whose names such Notes are so registered. Any Definitive Note issued in exchange for a beneficial interest pursuant to this Section 2.06(c)(iii) shall not bear the Private Placement Legend. (d) Transfer and Exchange of Definitive Notes for Beneficial Interests in Global Notes. (i) Restricted Definitive Notes to Beneficial Interests in Restricted Global Notes. If any Holder of a Restricted Definitive Note proposes to exchange such Note for a beneficial interest in a Restricted Global Note or to transfer such Restricted Definitive Notes to a Person who takes delivery thereof in the form of a beneficial interest in a Restricted Global Note, then, upon receipt by the Registrar of the following documentation: (A) if the Holder of such Restricted Definitive Note proposes to exchange such Note for a beneficial interest in a Restricted Global Note, a certificate from such Holder in the form of Exhibit C hereto, including the certifications in item (2)(b) thereof; (B) if such Restricted Definitive Note is being transferred to a QIB in accordance with Rule 144A under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (1) thereof; (C) if such Restricted Definitive Note is being transferred to a Non-U.S. Person in an offshore transaction in accordance with Rule 903 or Rule 904 under the 29

Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (2) thereof; (D) if such Restricted Definitive Note is being transferred pursuant to an exemption from the registration requirements of the Securities Act in accordance with Rule 144 under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(a) thereof; (E) if such Restricted Definitive Note is being transferred to an Institutional Accredited Investor in reliance on an exemption from the registration requirements of the Securities Act other than those listed in subparagraphs (B) through (D) above, a certificate to the effect set forth in Exhibit B hereto, including the certifications, certificates and Opinion of Counsel required by item (3) thereof, if applicable; (F) if such Restricted Definitive Note is being transferred to the Company or any of its Subsidiaries, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(b) thereof; or (G) if such Restricted Definitive Note is being transferred pursuant to an effective registration statement under the Securities Act, a certificate to the effect set forth in Exhibit B hereto, including the certifications in item (3)(c) thereof, the Trustee shall cancel the Restricted Definitive Note, increase or cause to be increased the aggregate principal amount of, in the case of clause (A) above, the appropriate Restricted Global Note, in the case of clause (B) above, the 144A Global Note, in the case of clause (C) above, the Regulation S Global Note, and in all other cases, the IAI Global Note. (ii) Restricted Definitive Notes to Beneficial Interests in Unrestricted Global Notes. A Holder of a Restricted Definitive Note may exchange such Note for a beneficial interest in an Unrestricted Global Note or transfer such Restricted Definitive Note to a Person who takes delivery thereof in the form of a beneficial interest in an Unrestricted Global Note only if: (A) such exchange or transfer is effected pursuant to the Exchange Offer in accordance with the Registration Rights Agreement and the Holder, in the case of an exchange, or the transferee, in the case of a transfer, certifies in the applicable Letter of Transmittal that it is not (1) a broker- dealer, (2) a Person participating in the distribution of the Exchange Notes or (3) a Person who is an affiliate (as defined in Rule 144) of the Company; (B) such transfer is effected pursuant to the Shelf Registration Statement in accordance with the Registration Rights Agreement; (C) such transfer is effected by a Broker-Dealer pursuant to the Exchange Offer Registration Statement in accordance with the Registration Rights Agreement; or (D) the Registrar receives the following: 30

(1) if the Holder of such Definitive Notes proposes to exchange such Notes for a beneficial interest in the Unrestricted Global Note, a certificate from such Holder in the form of Exhibit C hereto, including the certifications in item (1)(c) thereof; or (2) if the Holder of such Definitive Notes proposes to transfer such Notes to a Person who shall take delivery thereof in the form of a beneficial interest in the Unrestricted Global Note, a certificate from such Holder in the form of Exhibit B hereto, including the certifications in item (4) thereof; and, in each such case set forth in this subparagraph (D), if the Registrar so requests or if the Applicable Procedures so require, an Opinion of Counsel in form reasonably acceptable to the Registrar to the effect that such exchange or transfer is in compliance with the Securities Act and that the restrictions on transfer contained herein and in the Private Placement Legend are no longer required in order to maintain compliance with the Securities Act. Upon satisfaction of the conditions of any of the subparagraphs in this Section 2.06(d)(ii), the Trustee shall cancel the Definitive Notes and increase or cause to be increased the aggregate principal amount of the Unrestricted Global Note. (iii) Unrestricted Definitive Notes to Beneficial Interests in Unrestricted Global Notes. A Holder of an Unrestricted Definitive Note may exchange such Note for a beneficial interest in an Unrestricted Global Note or transfer such Definitive Notes to a Person who takes delivery thereof in the form of a beneficial interest in an Unrestricted Global Note at any time. Upon receipt of a request for such an exchange or transfer, the Trustee shall cancel the applicable Unrestricted Definitive Note and increase or cause to be increased the aggregate principal amount of one of the Unrestricted Global Notes. If any such exchange or transfer from a Definitive Note to a beneficial interest is effected pursuant to subparagraphs (ii)(B), (ii)(D) or (iii) above at a time when an Unrestricted Global Note has not yet been issued, the Company shall issue and, upon receipt of an Authentication Order in accordance with Section 2.02 hereof, the Trustee shall authenticate one or more Unrestricted Global Notes in an aggregate principal amount equal to the principal amount of Definitive Notes so transferred. (e) Transfer and Exchange of Definitive Notes for Definitive Notes. Upon request by a Holder of Definitive Notes and such Holder's compliance with the provisions of this Section 2.06(e), the Registrar shall register the transfer or exchange of Definitive Notes. Prior to such registration of transfer or exchange, the requesting Holder shall present or surrender to the Registrar the Definitive Notes duly endorsed or accompanied by a written instruction of transfer in form satisfactory to the Registrar duly executed by such Holder or by its attorney, duly authorized in writing. In addition, the requesting Holder shall provide any additional certifications, documents and information, as applicable, required pursuant to the following provisions of this Section 2.06(e). 31

(i) Restricted Definitive Notes to Restricted Definitive Notes. Any Restricted Definitive Note may be transferred to and registered in the name of Persons who take delivery thereof in the form of a Restricted Definitive Note if the Registrar receives the following: (A) if the transfer will be made pursuant to Rule 144A under the Securities Act, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications in item (1) thereof; (B) if the transfer will be made pursuant to Rule 903 or Rule 904, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications in item (2) thereof; and (C) if the transfer will be made pursuant to any other exemption from the registration requirements of the Securities Act, then the transferor must deliver a certificate in the form of Exhibit B hereto, including the certifications, certificates and Opinion of Counsel required by item (3) thereof, if applicable. (ii) Restricted Definitive Notes to Unrestricted Definitive Notes. Any Restricted Definitive Note may be exchanged by the Holder thereof for an Unrestricted Definitive Note or transferred to a Person or Persons who take delivery thereof in the form of an Unrestricted Definitive Note if: (A) such exchange or transfer is effected pursuant to the Exchange Offer in accordance with the Registration Rights Agreement and the Holder, in the case of an exchange, or the transferee, in the case of a transfer, certifies in the applicable Letter of Transmittal that it is not (1) a broker-dealer, (2) a Person participating in the distribution of the Exchange Notes or (3) a Person who is an affiliate (as defined in Rule 144) of the Company; (B) any such transfer is effected pursuant to the Shelf Registration Statement in accordance with the Registration Rights Agreement; (C) any such transfer is effected by a Broker-Dealer pursuant to the Exchange Offer Registration Statement in accordance with the Registration Rights Agreement; or (D) the Registrar receives the following: (1) if the Holder of such Restricted Definitive Notes proposes to exchange such Notes for an Unrestricted Definitive Note, a certificate from such Holder in the form of Exhibit C hereto, including the certifications in item (1)(d) thereof; or (2) if the Holder of such Restricted Definitive Notes proposes to transfer such Notes to a Person who shall take delivery thereof in the form of an Unrestricted Definitive Note, a certificate from such Holder in the form of Exhibit B hereto, including the certifications in item (4) thereof; 32

and, in each such case set forth in this subparagraph (D), if the Registrar so requests, an Opinion of Counsel in form reasonably acceptable to the Company to the effect that such exchange or transfer is in compliance with the Securities Act and that the restrictions on transfer contained herein and in the Private Placement Legend are no longer required in order to maintain compliance with the Securities Act. (iii) Unrestricted Definitive Notes to Unrestricted Definitive Notes. A Holder of Unrestricted Definitive Notes may transfer such Notes to a Person who takes delivery thereof in the form of an Unrestricted Definitive Note. Upon receipt of a request to register such a transfer, the Registrar shall register the Unrestricted Definitive Notes pursuant to the instructions from the Holder thereof. (f) Exchange Offer. Upon the occurrence of the Exchange Offer in accordance with the Registration Rights Agreement, the Company shall issue and, upon receipt of an Authentication Order in accordance with Section 2.02, the Trustee shall authenticate (i) one or more Unrestricted Global Notes in an aggregate principal amount equal to the principal amount of the beneficial interests in the Restricted Global Notes tendered for acceptance by Persons that certify in the applicable Letters of Transmittal that (x) they are not broker- dealers, (y) they are not participating in a distribution of the Exchange Notes and (z) they are not affiliates (as defined in Rule 144) of the Company, and accepted for exchange in the Exchange Offer and (ii) Definitive Notes in an aggregate principal amount equal to the principal amount of the Restricted Definitive Notes accepted for exchange in the Exchange Offer. Concurrently with the issuance of such Notes, the Trustee shall cause the aggregate principal amount of the applicable Restricted Global Notes to be reduced accordingly, and the Company shall execute and the Trustee shall authenticate and deliver to the Persons designated by the Holders of Definitive Notes so accepted Definitive Notes in the appropriate principal amount. (g) Legends. The following legends shall appear on the face of all Global Notes and Definitive Notes issued under this Indenture unless specifically stated otherwise in the applicable provisions of this Indenture. (i) Private Placement Legend. (A) Except as permitted by subparagraph (B) below, each Global Note and each Definitive Note (and all Notes issued in exchange therefor or substitution thereof) shall bear the legend in substantially the following form: "THE NOTES EVIDENCED HEREBY HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933 (THE "SECURITIES ACT") AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A)(1) TO A PERSON WHO THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT PURCHASING FOR ITS OWN ACCOUNT FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) IN AN OFFSHORE TRANSACTION COMPLYING WITH RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, (3) TO AN INSTITUTIONAL ACCREDITED INVESTOR IN A TRANSACTION 33

EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, (4) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (5) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAW OF THE STATES OF THE UNITED STATES." (B) Notwithstanding the foregoing, any Global Note or Definitive Note issued pursuant to subparagraphs (b)(iv), (c)(ii), (c)(iii), (d)(ii), (d)(iii), (e)(ii), (e)(iii) or (f) to this Section 2.06 (and all Notes issued in exchange therefor or substitution thereof) shall not bear the Private Placement Legend. (ii) Global Note Legend. Each Global Note shall bear a legend in substantially the following form: "THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE INDENTURE GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED PURSUANT TO SECTION 2.06 OF THE INDENTURE, (II) THIS GLOBAL NOTE MAY BE EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION 2.06(a) OF THE INDENTURE, (III) THIS GLOBAL NOTE MAY BE DELIVERED TO THE TRUSTEE FOR CANCELLATION PURSUANT TO SECTION 2.11 OF THE INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO A SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF CROWN CASTLE INTERNATIONAL CORP." (h) Cancellation and/or Adjustment of Global Notes. At such time as all beneficial interests in a particular Global Note have been exchanged for Definitive Notes or a particular Global Note has been redeemed, repurchased or canceled in whole and not in part, each such Global Note shall be returned to or retained and canceled by the Trustee in accordance with Section 2.11 hereof. At any time prior to such cancellation, if any beneficial interest in a Global Note is exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Note or for Definitive Notes, the principal amount of Notes represented by such Global Note shall be reduced accordingly and an endorsement shall be made on such Global Note by the Trustee or by the Depositary at the direction of the Trustee to reflect such reduction; and if the beneficial interest is being exchanged for or transferred to a Person who will take delivery thereof in the form of a beneficial interest in another Global Note, such other Global Note shall be increased accordingly and an endorsement shall be made on such Global Note by the Trustee or by the Depositary at the direction of the Trustee to reflect such increase. (i) General Provisions Relating to Transfers and Exchanges. (i) To permit registrations of transfers and exchanges, the Company shall execute and the Trustee shall authenticate Global Notes and Definitive Notes upon the Company's order or at the Registrar's request. 34

(ii) No service charge shall be made to a holder of a beneficial interest in a Global Note or to a Holder of a Definitive Note for any registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any transfer tax or similar governmental charge payable in connection therewith (other than any such transfer taxes or similar governmental charge payable upon exchange or transfer pursuant to Sections 2.10, 3.06, 3.09, 4.10, 4.15 and 9.05 hereof). (iii) The Registrar shall not be required to register the transfer of or exchange any Note selected for redemption in whole or in part, except the unredeemed portion of any Note being redeemed in part. (iv) All Global Notes and Definitive Notes issued upon any registration of transfer or exchange of Global Notes or Definitive Notes shall be the valid obligations of the Company, evidencing the same debt, and entitled to the same benefits under this Indenture, as the Global Notes or Definitive Notes surrendered upon such registration of transfer or exchange. (v) The Company shall not be required (A) to issue, to register the transfer of or to exchange any Notes during a period beginning at the opening of business 15 days before the day of any selection of Notes for redemption under Section 3.02 hereof and ending at the close of business on the day of selection, (B) to register the transfer of or to exchange any Note so selected for redemption in whole or in part, except the unredeemed portion of any Note being redeemed in part or (C) to register the transfer of or to exchange a Note between a record date and the next succeeding Interest Payment Date. (vi) Prior to due presentment for the registration of a transfer of any Note, the Trustee, any Agent and the Company may deem and treat the Person in whose name any Note is registered as the absolute owner of such Note for the purpose of receiving payment of principal of and interest on such Notes and for all other purposes, and none of the Trustee, any Agent or the Company shall be affected by notice to the contrary. (vii) The Trustee shall authenticate Global Notes and Definitive Notes in accordance with the provisions of Section 2.02 hereof. (viii) All certifications, certificates and Opinions of Counsel required to be submitted to the Registrar pursuant to this Section 2.06 to effect a registration of transfer or exchange may be submitted by facsimile. Section 2.07. Replacement Notes. If any mutilated Note is surrendered to the Trustee or the Company and the Trustee receives evidence to its satisfaction of the destruction, loss or theft of any Note, the Company shall issue and the Trustee, upon receipt of an Authentication Order, shall authenticate a replacement Note if the Trustee's requirements are met. If required by the Trustee or the Company, an indemnity bond must be supplied by the Holder that is sufficient in the judgment of the Trustee and the Company to protect the Company, the Trustee, any Agent and any authenticating agent from any loss that any of them may suffer if a Note is replaced. The Company may charge for its expenses in replacing a Note. 35

Every replacement Note is an additional obligation of the Company and shall be entitled to all of the benefits of this Indenture equally and proportionately with all other Notes duly issued hereunder. Section 2.08. Outstanding Notes. The Notes outstanding at any time are all the Notes authenticated by the Trustee except for those canceled by it, those delivered to it for cancellation, those reductions in the interest in a Global Note effected by the Trustee in accordance with the provisions hereof, and those described in this Section as not outstanding. Except as set forth in Section 2.09 hereof, a Note does not cease to be outstanding because the Company or an Affiliate of the Company holds the Note; however, Notes held by the Company or a Subsidiary of the Company shall not be deemed to be outstanding for purposes of Section 3.07(b) hereof. If a Note is replaced pursuant to Section 2.07 hereof, it ceases to be outstanding unless the Trustee receives proof satisfactory to it that the replaced Note is held by a bona fide purchaser. If the principal amount of any Note is considered paid under Section 4.01 hereof, it ceases to be outstanding and interest on it ceases to accrue. If the Paying Agent (other than the Company, a Subsidiary or an Affiliate of any thereof) holds, on a redemption date or maturity date, money sufficient to pay Notes payable on that date, then on and after that date such Notes shall be deemed to be no longer outstanding and shall cease to accrue interest. Section 2.09. Treasury Notes. In determining whether the Holders of the required principal amount of Notes have concurred in any direction, waiver or consent, Notes owned by the Company, or by any Person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company, shall be considered as though not outstanding, except that for the purposes of determining whether the Trustee shall be protected in relying on any such direction, waiver or consent, only Notes that the Trustee knows are so owned shall be so disregarded. Section 2.10. Temporary Notes. Until certificates representing Notes are ready for delivery, the Company may prepare and the Trustee, upon receipt of an Authentication Order, shall authenticate temporary Notes. Temporary Notes shall be substantially in the form of certificated Notes but may have variations that the Company considers appropriate for temporary Notes and as shall be reasonably acceptable to the Trustee. Without unreasonable delay, the Company shall prepare and the Trustee shall authenticate definitive Notes in exchange for temporary Notes. Holders of temporary Notes shall be entitled to all of the benefits of this Indenture. Section 2.11. Cancellation. The Company at any time may deliver Notes to the Trustee for cancellation. The Registrar and Paying Agent shall forward to the Trustee any Notes surrendered to them for registration of transfer, exchange or payment. The Trustee and no one else shall cancel all Notes surrendered for registration of 36

transfer, exchange, payment, replacement or cancellation and shall destroy canceled Notes (subject to the record retention requirement of the Exchange Act). Certification of the destruction of all canceled Notes shall be delivered to the Company. The Company may not issue new Notes to replace Notes that it has paid or that have been delivered to the Trustee for cancellation. Section 2.12. Defaulted Interest. If the Company defaults in a payment of interest on the Notes, it shall pay the defaulted interest in any lawful manner, plus, to the extent lawful, interest payable on the defaulted interest, to the Persons who are Holders on a subsequent special record date, in each case at the rate provided in the Notes and in Section 4.01 hereof. The Company shall notify the Trustee in writing of the amount of defaulted interest proposed to be paid on each Note and the date of the proposed payment. The Company shall fix or cause to be fixed each such special record date and payment date, provided that no such special record date shall be less than 10 days prior to the related payment date for such defaulted interest. At least 15 days before the special record date, the Company (or, upon the written request of the Company, the Trustee in the name and at the expense of the Company) shall mail or cause to be mailed to Holders a notice that states the special record date, the related payment date and the amount of such interest to be paid. ARTICLE 3 REDEMPTION AND PREPAYMENT Section 3.01. Notices to Trustee. If the Company elects to redeem Notes pursuant to the optional redemption provisions of Section 3.07 hereof, it shall furnish to the Trustee, at least 30 days but not more than 60 days before a redemption date, an Officers' Certificate setting forth (1) the clause of this Indenture pursuant to which the redemption shall occur, (2) the redemption date, (3) the principal amount of Notes to be redeemed and (4) the redemption price (expressed as a percentage of the principal amount). Section 3.02. Selection of Notes to Be Redeemed. If less than all of the Notes are to be redeemed or purchased in an offer to purchase at any time, the Trustee shall select the Notes to be redeemed as follows: (1) if the Notes are listed on any national securities exchange, in compliance with the requirements of the principal national securities exchange, if any, on which the Notes are listed; or (2) if the Notes are not listed on any national securities exchange, on a pro rata basis, by lot or by such other method as the Trustee shall deem fair and appropriate. No Notes of $1,000 of principal amount or less will be redeemed in part. Except as provided in the preceding sentence, provisions of this Indenture that apply to Notes called for redemption also apply to portions of Notes called for redemption. Notices of redemption will be mailed by first class mail at least 30 but not more than 60 days before the redemption date to each Holder of Notes to be redeemed at its registered address. Notices of redemption may not be conditional. If any Note is to be redeemed in part only, the notice of redemption that relates to such Note shall state the portion of the principal amount of that Note to be redeemed. A new Note in principal 37

amount equal to the unredeemed portion of the original Note presented for redemption will be issued in the name of the Holder thereof upon cancellation of the original Note. Notes called for redemption become due on the date fixed for redemption. On and after the redemption date, interest ceases to accrue on Notes or portions of them called for redemption. Section 3.03. Notice of Redemption. Subject to the provisions of Section 3.09 hereof, at least 30 days but not more than 60 days before a redemption date, the Company shall mail or cause to be mailed, by first class mail, a notice of redemption to each Holder whose Notes are to be redeemed at its registered address. The notice shall identify the Notes to be redeemed and shall state: (1) the redemption date; (2) the redemption price; (3) if any Note is being redeemed in part, the portion of the principal amount of such Note to be redeemed and that, after the redemption date upon surrender of such Note, a new Note or Notes in principal amount equal to the unredeemed portion shall be issued upon cancellation of the original Note; (4) the name and address of the Paying Agent; (5) that Notes called for redemption must be surrendered to the Paying Agent to collect the redemption price; (6) that, unless the Company defaults in making such redemption payment, interest on Notes called for redemption ceases to accrue on and after the redemption date; (7) the paragraph of the Notes and/or Section of this Indenture pursuant to which the Notes called for redemption are being redeemed; and (8) that no representation is made as to the correctness or accuracy of the CUSIP number, if any, listed in such notice or printed on the Notes. At the Company's request, the Trustee shall give the notice of redemption in the Company's name and at its expense; provided, however, that the Company shall have delivered to the Trustee, at least 45 days prior to the redemption date, an Officers' Certificate requesting that the Trustee give such notice and setting forth the information to be stated in such notice as provided in the preceding paragraph. Section 3.04. Effect of Notice of Redemption. Once notice of redemption is mailed in accordance with Section 3.03 hereof, Notes called for redemption become irrevocably due and payable on the redemption date at the redemption price. A notice of redemption may not be conditional. Section 3.05. Deposit of Redemption Price. 38

One Business Day prior to the redemption date, the Company shall deposit with the Trustee or with the Paying Agent money sufficient to pay the redemption price of and accrued interest on all Notes, if any, to be redeemed on that date. The Trustee or the Paying Agent shall promptly return to the Company any money deposited with the Trustee or the Paying Agent by the Company in excess of the amounts necessary to pay the redemption price of, and accrued interest, if any, on all Notes to be redeemed. If the Company complies with the provisions of the preceding paragraph, on and after the redemption date, interest shall cease to accrue on the Notes or the portions of the Notes called for redemption. If a Note is redeemed on or after an interest record date but on or prior to the related interest payment date, then any accrued and unpaid interest shall be paid to the Person in whose name such Note was registered at the close of business on such record date. If any Note called for redemption shall not be so paid upon surrender for redemption because of the failure of the Company to comply with the preceding paragraph, interest shall be paid on the unpaid principal, from the redemption date until such principal is paid, and, to the extent lawful, on any interest not paid on such unpaid principal, in each case at the rate provided in the Notes and in Section 4.01 hereof. Section 3.06. Notes Redeemed in Part. Upon surrender of a Note that is redeemed in part, the Company shall issue and, upon the Company's written request, the Trustee shall authenticate for the Holder at the expense of the Company a new Note equal in principal amount to the unredeemed portion of the Note surrendered. Section 3.07. Optional Redemption. (a) Except as provided in clause (b) of this Section 3.07, the Notes will not be redeemable at the Company's option prior to August 1, 2006. On or after August 1, 2006, the Company may redeem all or a part of the Notes upon not less than 30 nor more than 60 days' notice, at the redemption prices (expressed as percentages of principal amount) set forth below plus accrued and unpaid interest, if any, on the Notes redeemed to the applicable redemption date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), if redeemed during the twelve-month period beginning on August 1 of the years indicated below: Year Percentage ---- ---------- 2006....................................................... 104.688% 2007....................................................... 103.125% 2008....................................................... 101.563% 2009 and thereafter........................................ 100.000% (b) Notwithstanding the provisions of clause (a) of this Section 3.07, at any time during the period after the date of the original issuance of the Notes until August 1, 2004, the Company may on any one or more occasions redeem up to 35% of the aggregate principal amount of the Notes originally issued at a redemption price equal to 109.375% of the aggregate principal amount of the Notes to be redeemed on the redemption date with the net cash proceeds of one or more Public Equity Offerings and/or Strategic Equity Investments provided that: 39

(1) at least 65% of the aggregate principal amount of the Notes originally issued remains outstanding immediately after the occurrence of such redemption (excluding Notes held by the Company or any of its Subsidiaries); and (2) the redemption occurs within 60 days of the date of the closing of such Public Equity Offering or Strategic Equity Investment. (c) Any redemption pursuant to this Section 3.07 shall be made pursuant to the provisions of Section 3.01 through 3.06 hereof. Section 3.08. Mandatory Redemption. The Company shall not be required to make mandatory redemption or sinking fund payments with respect to the Notes. Section 3.09. Offer to Purchase by Application of Excess Proceeds. In the event that, pursuant to Section 4.10 hereof, the Company shall be required to commence an offer to all Holders to purchase Notes (an "Asset Sale Offer"), it shall follow the procedures specified below. The Asset Sale Offer shall remain open for a period of 20 Business Days following its commencement and no longer, except to the extent that a longer period is required by applicable law (the "Offer Period"). No later than five Business Days after the termination of the Offer Period (the "Purchase Date"), the Company shall purchase the aggregate principal amount (or accreted value, as applicable) of Notes and other senior Indebtedness of the Company required to be purchased pursuant to Section 4.10 hereof (on a pro rata basis if Notes and other senior Indebtedness of the Company tendered are in excess of the Excess Proceeds) (which maximum amount shall be the "Offer Amount") or, if less than the Offer Amount has been tendered, all Notes and other senior Indebtedness tendered in response to the Asset Sale Offer. Payment for any Notes so purchased shall be made in the same manner as interest payments are made. If the Purchase Date is on or after an interest record date and on or before the related interest payment date, any accrued and unpaid interest shall be paid to the Person in whose name a Note is registered at the close of business on such record date, and no additional interest shall be payable to Holders who tender Notes pursuant to the Asset Sale Offer. Upon the commencement of an Asset Sale Offer, the Company shall send, by first class mail, a notice to the Trustee and each of the Holders, with a copy to the Trustee. The notice shall contain all instructions and materials necessary to enable such Holders to tender Notes pursuant to the Asset Sale Offer. The Asset Sale Offer shall be made to all Holders. The notice, which shall govern the terms of the Asset Sale Offer, shall state: (a) that the Asset Sale Offer is being made pursuant to this Section 3.09 and Section 4.10 hereof and the length of time the Asset Sale Offer shall remain open; (b) the Offer Amount, the purchase price and the Purchase Date; 40

(c) that any Note not tendered or accepted for payment shall continue to accrue interest; (d) that, unless the Company defaults in making such payment, any Note accepted for payment pursuant to the Asset Sale Offer shall cease to accrue interest after the Purchase Date; (e) that Holders electing to have a Note purchased pursuant to an Asset Sale Offer may elect to have Notes purchased in integral multiples of $1,000 only; (f) that Holders electing to have a Note purchased pursuant to any Asset Sale Offer shall be required to surrender the Note, with the form entitled "Option of Holder to Elect Purchase" on the reverse of the Note completed, or transfer by book-entry transfer, to the Company, a depositary, if appointed by the Company, or a Paying Agent at the address specified in the notice at least three days before the Purchase Date; (g) that Holders shall be entitled to withdraw their election if the Company, the depositary or the Paying Agent, as the case may be, receives, not later than the expiration of the Offer Period, a telegram, telex, facsimile transmission or letter setting forth the name of the Holder, the principal amount of the Note the Holder delivered for purchase and a statement that such Holder is withdrawing his election to have such Note purchased; (h) that, if the aggregate principal amount (or accreted value, as applicable) of Notes and other senior Indebtedness of the Company surrendered by Holders exceeds the Offer Amount, the Company shall select the Notes to be purchased on a pro rata basis (with such adjustments as may be deemed appropriate by the Company so that only Notes in denominations of $1,000, or integral multiples thereof, shall be purchased); and (i) that Holders whose Notes were purchased only in part shall be issued new Notes equal in principal amount to the unpurchased portion of the Notes surrendered (or transferred by book-entry transfer). On or before the Purchase Date, the Company shall, to the extent lawful, accept for payment, on a pro rata basis to the extent necessary, the Offer Amount of Notes or portions thereof tendered pursuant to the Asset Sale Offer, or if less than the Offer Amount has been tendered, all Notes and other senior Indebtedness tendered, and shall deliver to the Trustee an Officers' Certificate stating that such Notes or portions thereof were accepted for payment by the Company in accordance with the terms of this Section 3.09. The Company, the Depositary or the Paying Agent, as the case may be, shall promptly (but in any case not later than five days after the Purchase Date) mail or deliver to each tendering Holder an amount equal to the purchase price of the Notes tendered by such Holder and accepted by the Company for purchase, and the Company shall promptly issue a new Note, and the Trustee, upon written request from the Company shall authenticate and mail or deliver such new Note to such Holder, in a principal amount equal to any unpurchased portion of the Note surrendered. Any Note not so accepted shall be promptly mailed or delivered by the Company to the Holder thereof. The Company shall publicly announce the results of the Asset Sale Offer on the Purchase Date. Other than as specifically provided in this Section 3.09, any purchase pursuant to this Section 3.09 shall be made pursuant to the provisions of Sections 3.01 through 3.06 hereof. 41

ARTICLE 4 COVENANTS Section 4.01. Payment of Notes. The Company shall pay or cause to be paid the principal of, premium, if any, and interest on the Notes on the dates and in the manner provided in the Notes. Principal, premium, if any, and interest shall be considered paid on the date due if the Paying Agent, if other than the Company or a Subsidiary thereof, holds as of 10:00 a.m. Eastern Time on the due date money deposited by the Company in immediately available funds and designated for and sufficient to pay all principal, premium, if any, and interest then due. The Company shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal at the rate equal to 1% per annum in excess of the then applicable interest rate on the Notes to the extent lawful; it shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any applicable grace period) at the same rate to the extent lawful. Section 4.02. Maintenance of Office or Agency. The Company shall maintain in the Borough of Manhattan, the City of New York, an office or agency (which may be an office of the Trustee or an affiliate of the Trustee, Registrar or co-registrar) where Notes may be surrendered for registration of transfer or for exchange and where notices and demands to or upon the Company in respect of the Notes and this Indenture may be served. The Company shall give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. If at any time the Company shall fail to maintain any such required office or agency or shall fail to furnish the Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at the Corporate Trust Office of the Trustee. The Company may also from time to time designate one or more other offices or agencies where the Notes may be presented or surrendered for any or all such purposes and may from time to time rescind such designations; provided, however, that no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency in the Borough of Manhattan, the City of New York, for such purposes. The Company shall give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or agency. The Company hereby designates the Corporate Trust Office of the Trustee as one such office or agency of the Company in accordance with Section 2.03 hereof. Section 4.03. Reports. Whether or not required by the SEC, so long as any Notes are outstanding, the Company shall furnish to the Holders of Notes: (1) quarterly and annual financial information that would be required to be contained in a filing with the SEC on Forms 10-Q and 10-K if the Company were required to file such Forms, including a "Management's Discussion and Analysis of Financial Condition and Results of Operations" that describes the financial condition and results of operations of the 42

Company and its consolidated Subsidiaries (showing in reasonable detail, in the footnotes to the financial statements and in the "Management's Discussion and Analysis of Financial Condition and Results of Operations" (in each case to the extent not prohibited by the SEC's rules and regulations): (a) the financial condition and results of operations of the Company and its Restricted Subsidiaries separate from the financial condition and results of operations of the Unrestricted Subsidiaries of the Company; and (b) the Tower Cash Flow for the most recently completed fiscal quarter and the Adjusted Consolidated Cash Flow for the most recently completed four-quarter period) and, with respect to the annual information only, a report thereon by the Company's certified independent accountants; and (2) all current reports that would be required to be filed with the SEC on Form 8-K if the Company were required to file such reports, in each case within the time periods specified in the SEC's rules and regulations. (3) For so long as any Notes remain outstanding, the Company shall furnish to the Holders and to securities analysts and prospective investors, upon their request, the information required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act. In addition, whether or not required by the rules and regulations of the SEC, the Company shall file a copy of all such information and reports with the SEC for public availability within the time periods specified in the SEC's rules and regulations (unless the SEC will not accept such a filing) and make such information available to securities analysts and prospective investors upon request. The Company shall at all times comply with TIA (S). 314(a). Section 4.04. Compliance Certificate. (1) The Company shall deliver to the Trustee, within 90 days after the end of each fiscal year, an Officers' Certificate stating that a review of the activities of the Company and its Subsidiaries during the preceding fiscal year has been made under the supervision of the signing Officers with a view to determining whether the Company has kept, observed, performed and fulfilled its obligations under this Indenture, and further stating, as to each such Officer signing such certificate, that to the best of his or her knowledge the Company has kept, observed, performed and fulfilled each and every covenant contained in this Indenture and is not in default in the performance or observance of any of the terms, provisions and conditions of this Indenture (or, if a Default or Event of Default shall have occurred, describing all such Defaults or Events of Default of which he or she may have knowledge and what action the Company is taking or proposes to take with respect thereto) and that to the best of his or her knowledge no event has occurred and remains in existence by reason of which payments on account of the principal of or interest, if any, on the Notes is prohibited or if such event has occurred, a description of the event and what action the Company is taking or proposes to take with respect thereto. (2) So long as not contrary to the then current recommendations of the American Institute of Certified Public Accountants, the year-end financial statements delivered pursuant to Section 4.03(a) above shall be accompanied by a written statement of the Company's 43

independent public accountants (who shall be a firm of established national reputation) that in making the examination necessary for certification of such financial statements, nothing has come to their attention that would lead them to believe that the Company has violated any provisions of Article 4 or Article 5 hereof or, if any such violation has occurred, specifying the nature and period of existence thereof, it being understood that such accountants shall not be liable directly or indirectly to any Person for any failure to obtain knowledge of any such violation. (3) The Company shall, so long as any of the Notes are outstanding, deliver to the Trustee, forthwith upon any Officer becoming aware of any Default or Event of Default, an Officers' Certificate specifying such Default or Event of Default and what action the Company is taking or proposes to take with respect thereto. Section 4.05. Taxes. The Company shall pay, and shall cause each of its Subsidiaries to pay, prior to delinquency, all material taxes, assessments, and governmental levies except such as are contested in good faith and by appropriate proceedings or where the failure to effect such payment is not adverse in any material respect to the Holders of the Notes. Section 4.06. Stay, Extension and Usury Laws. The Company covenants (to the extent that it may lawfully do so) that it shall not at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay, extension or usury law wherever enacted, now or at any time hereafter in force, that may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and covenants that it shall not, by resort to any such law, hinder, delay or impede the execution of any power herein granted to the Trustee, but shall suffer and permit the execution of every such power as though no such law has been enacted. Section 4.07. Restricted Payments. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, directly or indirectly: (1) declare or pay any dividend or make any other payment or distribution on account of the Company's or any of its Restricted Subsidiaries' Equity Interests (including, without limitation, any payment in connection with any merger or consolidation involving the Company or any of its Restricted Subsidiaries) or to the direct or indirect holders of the Company's or any of its Restricted Subsidiaries' Equity Interests in their capacity as such (other than dividends or distributions payable in Equity Interests (other than Disqualified Stock) of the Company or to the Company or a Restricted Subsidiary of the Company); (2) purchase, redeem or otherwise acquire or retire for value (including without limitation, in connection with any merger or consolidation involving the Company) any Equity Interests of the Company or any direct or indirect parent of the Company (other than any such Equity Interests owned by the Company or any of its Restricted Subsidiaries); 44

(3) make any payment on or with respect to, or purchase, redeem, defease or otherwise acquire or retire for value any Indebtedness that is subordinated to the Notes, except a payment of interest or principal at Stated Maturity; or (4) make any Restricted Investment, (all such payments and other actions set forth in these clauses (1) through (4) above, including those occurring since the date of the May 1999 Senior Discount Note Indenture, being collectively referred to as "Restricted Payments"), unless, at the time of and after giving effect to such Restricted Payment: (1) no Default has occurred and is continuing or would occur as a consequence of the Restricted Payment; and (2) the Company would have been permitted to incur at least $1.00 of additional Indebtedness pursuant to the Debt to Adjusted Consolidated Cash Flow Ratio test set forth in the first paragraph of Section 4.09 hereof; provided that the Company and its Restricted Subsidiaries shall not be required to comply with this clause (2) in order to make any Restricted Investment; and (3) such Restricted Payment, together with the aggregate amount of all other Restricted Payments made by the Company and its Restricted Subsidiaries after the date of the May 1999 Senior Discount Note Indenture (excluding Restricted Payments permitted by clauses (2), (3) and (4) of the paragraph of exceptions below), is less than the sum, without duplication, of: (a) 100% of the Consolidated Cash Flow of the Company for the period (taken as one accounting period) from the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed to the end of the Company's most recently ended fiscal quarter for which internal financial statements are available at the time of such Restricted Payment (or, if the Consolidated Cash Flow for such period is a deficit, less 100% of the deficit), less 1.75 times the Consolidated Interest Expense of the Company since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed; plus (b) 100% of the aggregate net cash proceeds received by the Company since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed as a contribution to its common equity capital or from the issue or sale of Equity Interests of the Company (other than Disqualified Stock and except to the extent such net cash proceeds are used to incur new Indebtedness outstanding pursuant to clause (11) of the second paragraph of Section 4.09 hereof) or from the issue or sale of Disqualified Stock or debt securities of the Company that have been converted into Equity Interests (other than Equity Interests (or Disqualified Stock or convertible debt securities) sold to a Subsidiary of the Company and other than Disqualified Stock or convertible debt securities that have been converted into Disqualified Stock); plus (c) to the extent that any Restricted Investment that was made after the date of the May 1999 Senior Discount Note Indenture is sold for cash or otherwise liquidated or repaid for cash, the lesser of: 45

(A) the cash return of capital with respect to the Restricted Investment (less the cost of disposition, if any); and (B) the initial amount of the Restricted Investment; plus (d) to the extent that any Unrestricted Subsidiary of the Company and all of its Subsidiaries are designated as Restricted Subsidiaries after the date of the May 1999 Senior Discount Note Indenture, the lesser of: (A) the fair market value of the Company's Investments in such Subsidiaries as of the date of such designation; or (B) the sum of: (x) the fair market value of the Company's Investments in such Subsidiaries as of the date on which such Subsidiaries were originally designated as Unrestricted Subsidiaries; and (y) the amount of any Investments made in such Subsidiaries subsequent to such designation (and treated as Restricted Payments) by the Company or any Restricted Subsidiary; provided that: (i) in the event the Unrestricted Subsidiaries designated as Restricted Subsidiaries are CTSH and its Subsidiaries, the references in clauses (A) and (B) of this clause (d) to fair market value of the Company's Investments in such Subsidiaries shall mean the amount by which the fair market value of all such Investments exceeds 34.3% of the fair market value of CTSH and its Subsidiaries as a whole; and (ii) in the event the Unrestricted Subsidiaries designated as Restricted Subsidiaries are CCAIC and its Subsidiaries, the references in clauses (A) and (B) of this clause (d) to fair market value of the Company's Investments in such Subsidiaries shall mean the amount by which the fair market value of all such Investments exceeds $250.0 million; plus (e) 50% of any dividends received by the Company or a Restricted Subsidiary after the date of the May 1999 Senior Discount Note Indenture from an Unrestricted Subsidiary of the Company, to the extent that such dividends were not otherwise included in Consolidated Net Income of the Company for such period. The preceding provisions shall not prohibit: (1) the payment of any dividend within 60 days after the date of declaration of that dividend, if at said date of declaration such payment would have complied with the provisions of this Indenture; 46

(2) the making of any Investment or the redemption, repurchase, retirement, defeasance or other acquisition of any subordinated Indebtedness or Equity Interests of the Company in exchange for, or out of the net cash proceeds from the sale since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed (other than to a Subsidiary of the Company) of Equity Interests of the Company (other than any Disqualified Stock); provided that the net cash proceeds are not used to incur new Indebtedness pursuant to clause (11) of the second paragraph of Section 4.09 hereof); and provided further that, in each case, the amount of any net cash proceeds that are so utilized will be excluded from clause (3)(b) of the preceding paragraph; (3) the defeasance, redemption, repurchase or other acquisition of subordinated Indebtedness with the net cash proceeds from an incurrence of Permitted Refinancing Indebtedness; (4) the payment of any dividend by a Restricted Subsidiary of the Company to the holders of its Equity Interests on a pro rata basis; (5) the repurchase, redemption or other acquisition or retirement for value of any Equity Interests of the Company or any Restricted Subsidiary of the Company held by any member of the Company's (or any of its Restricted Subsidiaries') management pursuant to any management equity subscription agreement or stock option agreement in effect as of the date of the May 1999 Senior Discount Note Indenture; provided that the aggregate price paid for all of the repurchased, redeemed, acquired or retired Equity Interests may not exceed (a) $500,000 in any twelve-month period and (b) $5.0 million in the aggregate since the date of the August 1999 Senior Note Indenture; or (6) the payment of scheduled dividends on the Company's 123/4% Senior Exchangeable Preferred Stock due 2010, whether paid in cash or in kind through the issuance of additional shares of such preferred stock, all in accordance with the certificate of designations governing such preferred stock as in effect on the date of the May 1999 Senior Discount Note Indenture. The Board of Directors may designate any Restricted Subsidiary to be an Unrestricted Subsidiary if such designation would not cause a Default. For purposes of making such determination, all outstanding Investments by the Company and its Restricted Subsidiaries (except to the extent repaid in cash) in the Subsidiary so designated will be deemed to be Restricted Payments at the time of the designation and will reduce the amount available for Restricted Payments under the first paragraph in this Section 4.07. All of those outstanding Investments will be deemed to constitute Investments in an amount equal to the fair market value of the Investments at the time of such designation. Such designation will only be permitted if the Restricted Payment would be permitted at the time and if the Restricted Subsidiary otherwise meets the definition of an Unrestricted Subsidiary. The Board of Directors may designate any Unrestricted Subsidiary to be a Restricted Subsidiary if the designation would not cause a Default. The amount of all Restricted Payments (other than cash) will be the fair market value on the date of the Restricted Payment of the assets or securities proposed to be transferred or issued by the Company or the applicable Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment. The fair market value of any property, assets or Investments required by this covenant to be valued will be valued 47

by the Board of Directors whose resolution with respect to the determination will be delivered to the Trustee. Section 4.08. Dividend and Other Payment Restrictions Affecting Subsidiaries. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to exist or become effective any encumbrance or restriction on the ability of any Restricted Subsidiary to: (1) pay dividends or make any other distributions to the Company or any of its Restricted Subsidiaries on its Capital Stock or with respect to any other interest or participation in, or measured by, its profits; (2) pay any indebtedness owed to the Company or any of its Restricted Subsidiaries; (3) make loans or advances to the Company or any of its Restricted Subsidiaries; or (4) transfer any of its properties or assets to the Company or any of its Restricted Subsidiaries. The preceding restrictions shall not apply to encumbrances or restrictions existing under or by reason of: (1) Existing Indebtedness as in effect on the date hereof, and any amendments, modifications, restatements, renewals, increases, supplements, refundings, replacements or refinancings thereof; provided that such amendments, modifications, restatements, renewals, increases, supplements, refundings, replacements or refinancings are no more restrictive, taken as a whole, with respect to such dividend and other payment restrictions than those contained in the applicable series of Existing Indebtedness as in effect on the date hereof; (2) Indebtedness of any Restricted Subsidiary under any Credit Facility that is permitted to be incurred pursuant to Section 4.09 hereof; provided that such Credit Facility and Indebtedness contain only such encumbrances and restrictions on such Restricted Subsidiary's ability to engage in the activities set forth in clauses (1) through (4) of the preceding paragraph as are, at the time such Credit Facility is entered into or amended, modified, restated, renewed, increased, supplemented, refunded, replaced or refinanced, ordinary and customary for a Credit Facility of that type as determined in the good faith judgment of the Board of Directors (and evidenced in a board resolution), which determination shall be conclusively binding; (3) encumbrances and restrictions applicable to any Unrestricted Subsidiary, as the same are in effect as of the date on which the Subsidiary becomes a Restricted Subsidiary, and as the same may be amended, modified, restated, renewed, increased, supplemented, refunded, replaced or refinanced; provided that such amendments, modifications, restatements, renewals, increases, supplements, refundings, replacement or refinancings are no more restrictive, taken as a whole, with respect to the dividend and other payment restrictions than those contained in the applicable series of Indebtedness of such Subsidiary as in effect on the date on which such Subsidiary becomes a Restricted Subsidiary; 48

(4) any Indebtedness incurred in compliance with Section 4.09 hereof or any agreement pursuant to which such Indebtedness is issued if the encumbrance or restriction applies only in the event of a payment default or default with respect to a financial covenant contained in the Indebtedness or agreement and the encumbrance or restriction is not materially more disadvantageous to the Holders of the Notes than is customary in comparable financings (as determined by the Company) and the Company determines that any such encumbrance or restriction will not materially affect the Company's ability to pay interest or principal on the Notes; (5) this Indenture; (6) applicable law; (7) any instrument governing Indebtedness or Capital Stock of a Person acquired by the Company or any of its Restricted Subsidiaries as in effect at the time that Person is acquired by the Company (except to the extent the Indebtedness was incurred in connection with or in contemplation of the acquisition), which encumbrance or restriction is not applicable to any Person, or the properties or assets of any Person, other than the Person, or the property or assets of the Person, so acquired, provided that, in the case of Indebtedness, the Indebtedness was permitted by the terms hereof to be incurred; (8) customary non-assignment provisions in leases or licenses entered into in the ordinary course of business; (9) purchase money obligations for property acquired in the ordinary course of business that impose restrictions of the nature described in clause (5) in the second paragraph of Section 4.09 hereof on the property so acquired; (10) the provisions of agreements governing Indebtedness incurred pursuant to clause (4) of the second paragraph of Section 4.09 hereof; (11) any agreement for the sale of a Restricted Subsidiary that restricts that Restricted Subsidiary pending its sale; (12) Permitted Refinancing Indebtedness, provided that the restrictions contained in the agreements governing the Permitted Refinancing Indebtedness are no more restrictive, taken as a whole, than those contained in the agreements governing the Indebtedness being refinanced; (13) Liens permitted to be incurred pursuant to the provisions of Section 4.12 hereof that limit the right of the debtor to transfer the assets subject to such Liens; (14) provisions with respect to the disposition or distribution of assets or property in joint venture agreements and other similar agreements; and (15) restrictions on cash or other deposits or net worth imposed by customers under contracts entered into in the ordinary course of business. Section 4.09. Incurrence of Indebtedness and Issuance of Preferred Stock. 49

The Company shall not, and shall not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, issue, assume, guarantee or otherwise become directly or indirectly liable, contingently or otherwise, with respect to (collectively, "incur") any Indebtedness (including Acquired Debt) and the Company will not issue any Disqualified Stock and will not permit any of its Restricted Subsidiaries to issue any shares of preferred stock; provided that the Company may incur Indebtedness (including Acquired Debt) or issue shares of Disqualified Stock and the Company's Restricted Subsidiaries may incur Indebtedness (including Acquired Debt) or issue preferred stock if, in each case, the Company's Debt to Adjusted Consolidated Cash Flow Ratio at the time of incurrence of the Indebtedness or the issuance of the preferred stock, after giving pro forma effect to such incurrence or issuance as of such date and to the use of proceeds from such incurrence or issuance as if the same had occurred at the beginning of the most recently ended four full fiscal quarter period of the Company for which internal financial statements are available, would have been no greater than 7.5 to 1. The provisions of the first paragraph of this Section 4.09 shall not prohibit the incurrence of any of the following items of Indebtedness or to the issuance of any of the following items of Disqualified Stock or preferred stock (collectively, "Permitted Debt"): (1) the incurrence by the Company or any of its Restricted Subsidiaries of Indebtedness under Credit Facilities since the date of the August 1999 Senior Note Indenture in an aggregate principal amount (with letters of credit being deemed to have a principal amount equal to the maximum potential liability of the Company and its Restricted Subsidiaries thereunder) at any one time outstanding not to exceed the product of $150,000 times the number of Completed Towers on the date of such incurrence; (2) the incurrence by the Company and its Restricted Subsidiaries of the Existing Indebtedness; (3) the incurrence by the Company of the Indebtedness represented by notes issued on the date of the May 1999 Senior Discount Note Indenture; (4) the issuance by the Company of additional shares of its 12 3/4% Senior Exchangeable Preferred Stock due 2010 solely for the purpose of paying dividends thereon and the incurrence by the Company of Indebtedness represented by the Company's 12 3/4% Senior Subordinated Exchange Debentures due 2010; (5) the incurrence by the Company or any of its Restricted Subsidiaries of Indebtedness since the date of the August 1999 Senior Note Indenture represented by Capital Lease Obligations, mortgage financings or purchase money obligations, in each case incurred for the purpose of financing all or any part of the purchase price or cost of construction or improvement of property, plant or equipment used in the business of the Company or such Restricted Subsidiary, in an aggregate principal amount, including all Permitted Refinancing Indebtedness incurred to refund, refinance or replace any other Indebtedness incurred pursuant to this clause (5), not to exceed $10.0 million at any one time outstanding; (6) the incurrence by the Company or any of its Restricted Subsidiaries of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of which are used to extend, refinance, renew, replace, defease or refund Indebtedness of the Company or any of its Restricted Subsidiaries or Disqualified Stock of the Company (other than intercompany 50

Indebtedness) that was permitted by this Indenture to be incurred under the first paragraph of this Section 4.09 or clauses (2), (3), (4), (5) or this clause (6) of this paragraph; (7) the incurrence by the Company or any of its Restricted Subsidiaries of intercompany Indebtedness between or among the Company and any of its Restricted Subsidiaries; provided, however, that: (i) if the Company is the obligor on such Indebtedness, such Indebtedness is expressly subordinated to the prior payment in full in cash of all Obligations with respect to the Notes of such series and that: (ii) (A) any subsequent issuance or transfer of Equity Interests that results in any such Indebtedness being held by a Person other than the Company or a Restricted Subsidiary; and (B) any sale or other transfer of any such Indebtedness to a Person that is not either the Company or a Restricted Subsidiary, shall be deemed, in each case, to constitute an incurrence of the Indebtedness by the Company or the Restricted Subsidiary, as the case may be; (8) the incurrence by the Company or any of its Restricted Subsidiaries of Hedging Obligations that are incurred for the purpose of fixing or hedging interest rate risk with respect to any floating rate Indebtedness that is permitted by the terms of this Indenture to be outstanding or currency exchange risk; (9) the guarantee by the Company or any of its Restricted Subsidiaries of Indebtedness of the Company or a Restricted Subsidiary of the Company that was permitted to be incurred by another provision of this Indenture; (10) the incurrence by the Company or any of its Restricted Subsidiaries of Acquired Debt in connection with the acquisition of assets or a new Subsidiary and the incurrence by the Company's Restricted Subsidiaries of Indebtedness as a result of the designation of an Unrestricted Subsidiary as a Restricted Subsidiary; provided that, in the case of any such incurrence of Acquired Debt, such Acquired Debt was incurred by the prior owner of such assets or such Restricted Subsidiary prior to such acquisition by the Company or one of its Restricted Subsidiaries and was not incurred in connection with, or in contemplation of, the acquisition by the Company or one of its Restricted Subsidiaries; and provided further that, in the case of any incurrence pursuant to this clause (10), as a result of such acquisition by the Company or one of its Restricted Subsidiaries, the Company's Debt to Adjusted Consolidated Cash Flow Ratio at the time of incurrence of such Acquired Debt, after giving pro forma effect to such incurrence as if the same had occurred at the beginning of the most recently ended four full fiscal quarter period of the Company for which internal financial statements are available, would have been less than the Company's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such incurrence; (11) the incurrence by the Company or any of its Restricted Subsidiaries of Indebtedness or Disqualified Stock not to exceed, at any one time outstanding, the sum of: 51

(i) 2.0 times the aggregate net cash proceeds; plus (ii) 1.0 times the fair market value of non-cash proceeds (evidenced by a resolution of the Board of Directors set forth in an Officers' Certificate delivered to the Trustee); in each case, from the issuance and sale, other than to a Subsidiary, of Equity Interests (other than Disqualified Stock) of the Company since the beginning of the fiscal quarter during which the May 1999 Senior Discount Note Indenture was executed (less the amount of such proceeds used to make Restricted Payments as provided in clause (3)(b) of the first paragraph or clause (2) of the second paragraph of Section 4.07 hereof); and (12) the incurrence by the Company or any of its Restricted Subsidiaries since the date of the August 1999 Senior Note Indenture of additional Indebtedness and/or the issuance by the Company of Disqualified Stock in an aggregate principal amount, accreted value or liquidation preference, as applicable, at any time outstanding, not to exceed $25.0 million. In addition, the Company shall not: (1) incur any Indebtedness that is contractually subordinated in right of payment to any other Indebtedness of the Company unless such Indebtedness is also contractually subordinated in right of payment to the Notes on substantially identical terms; provided, however, that no Indebtedness of the Company will be deemed to be contractually subordinated in right of payment to any other Indebtedness of the Company solely by virtue of being unsecured; and (2) permit any of its Unrestricted Subsidiaries to incur any Indebtedness other than Non-Recourse Debt. For purposes of determining compliance with this Section 4.09, in the event that an item of Indebtedness meets the criteria of more than one of the categories of Permitted Debt described in clauses (1) through (12) above or is entitled to be incurred pursuant to the first paragraph of this Section 4.09, the Company shall, in its sole discretion, classify (or later reclassify in whole or in part) such item of Indebtedness in any manner that complies with this Section 4.09. Accrual of interest, accretion or amortization of original issue discount and the payment of interest in the form of additional Indebtedness shall not be deemed to be an incurrence of Indebtedness for purposes of this Section 4.09. Indebtedness under Credit Facilities outstanding on the date hereof shall be deemed to have been incurred on such date in reliance on the exception provided by clause (1) of the definition of Permitted Debt. The debt represented by the Notes issued on the date hereof shall be deemed to have been incurred on such date in reliance on the exception provided by clause (11) of the definition of Permitted Debt and the exchange notes to be issued in exchange for the Notes shall be deemed to be a Permitted Refinancing under such clause (11). Section 4.10. Asset Sales. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, consummate an Asset Sale unless: 52

(1) the Company (or the Restricted Subsidiary, as the case may be) receives consideration at the time of the Asset Sale at least equal to the fair market value of the assets or Equity Interests issued or sold or otherwise disposed of; (2) fair market value is determined by the Board of Directors and evidenced by a resolution of the Board of Directors set forth in an Officers' Certificate delivered to the Trustee; and (3) except in the case of a Tower Asset Exchange, at least 75% of the consideration received in such Asset Sale by the Company or such Restricted Subsidiary is in the form of cash or Cash Equivalents. For purposes of this provision, each of the following shall be deemed to be cash: (a) any liabilities, as shown on the Company's or such Restricted Subsidiary's most recent balance sheet, of the Company's or any Restricted Subsidiary (other than contingent liabilities and liabilities that are by their terms subordinated to the Notes or any guarantee of the Notes) that are assumed by the transferee of any assets pursuant to a customary novation agreement that releases the Company or the Restricted Subsidiary from further liability; and (b) any securities, notes or other obligations received by the Company or any Restricted Subsidiary from the transferee that are converted by the Company or the Restricted Subsidiary into cash within 20 days of the applicable Asset Sale, to the extent of the cash received in that conversion. Within 365 days after the receipt of any Net Proceeds from an Asset Sale, the Company or the Restricted Subsidiary may apply those Net Proceeds to: (1) reduce Indebtedness under a Credit Facility; (2) reduce other Indebtedness of any of the Restricted Subsidiaries; (3) the acquisition of all or substantially all the assets of a Permitted Business; (4) the acquisition of Voting Stock of a Permitted Business from a Person that is not a Subsidiary of the Company; provided that, after giving effect to the acquisition, the Company or its Restricted Subsidiary owns a majority of the Voting Stock of that business; or (5) the making of a capital expenditure or the acquisition of other long-term assets that are used or useful in a Permitted Business. Pending the final application of any Net Proceeds, the Company may temporarily reduce revolving credit borrowings or otherwise invest the Net Proceeds in any manner that is not prohibited by this Indenture. Any Net Proceeds from Asset Sales that are not applied or invested as provided in the preceding paragraph shall be deemed to constitute "Excess Proceeds". When the aggregate amount of Excess Proceeds exceeds $10.0 million, the Company shall make an Asset Sale Offer to all Holders of Notes, 53

and all holders of other senior Indebtedness of the Company containing provisions similar to those set forth in this Indenture with respect to offers to purchase or redeem with the proceeds of sales of assets, to purchase the maximum principal amount of Notes and such other senior Indebtedness of the Company that may be purchased out of the Excess Proceeds. The offer price in any Asset Sale Offer will be payable in cash and will be 100% of the principal amount of the Notes, plus accrued and unpaid interest to the date of purchase, if any. In the case of any other senior Indebtedness, the offer price shall be 100% of the principal amount of the Indebtedness plus accrued and unpaid interest thereon, if any, to the date of purchase. Each Asset Sale Offer shall be made in accordance with the procedures set forth herein and the other senior Indebtedness of the Company. If any Excess Proceeds remain after consummation of an Asset Sale Offer, the Company may use the remaining Excess Proceeds for any purpose not otherwise prohibited by this Indenture. If the aggregate principal amount, as applicable, of Notes and the other senior Indebtedness of the Company tendered into the Asset Sale Offer exceeds the amount of Excess Proceeds, the Trustee shall select the Notes and such other senior Indebtedness to be purchased on a pro rata basis. Upon completion of the Asset Sale Offer, the amount of Excess Proceeds shall be reset at zero. Section 4.11. Transactions with Affiliates. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise dispose of any of its properties or assets to, or purchase any property or assets from, or enter into or make or amend any transaction, contract, agreement, understanding, loan, advance or guarantee with, or for the benefit of, any Affiliate (each of the foregoing, an "Affiliate Transaction"), unless: (1) such Affiliate Transaction is on terms that are no less favorable to the Company or the relevant Restricted Subsidiary than those that would have been obtained in a comparable transaction by the Company or such Restricted Subsidiary with an unrelated Person; and (2) the Company delivers to the Trustee: (a) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $1.0 million, a resolution of the Board of Directors set forth in an Officers' Certificate certifying that the Affiliate Transaction complies with clause (1) above and that the Affiliate Transaction has been approved by a majority of the disinterested members of the Board of Directors; and (b) with respect to any Affiliate Transaction or series of related Affiliate Transactions involving aggregate consideration in excess of $10.0 million, an opinion to the Holders of the Notes as to the fairness of the Affiliate Transaction from a financial point of view issued by an accounting, appraisal or investment banking firm of national standing. Notwithstanding the foregoing, the following items shall not be deemed Affiliate Transactions: (1) any employment arrangements with any executive officer of the Company or a Restricted Subsidiary that is entered into by the Company or any of its Restricted Subsidiaries in the ordinary course of business and consistent with compensation arrangements of similarly situated executive officers at comparable companies engaged in Permitted Businesses; 54

(2) transactions between or among the Company and/or its Restricted Subsidiaries; (3) payment of directors fees in an aggregate annual amount not to exceed $25,000 per Person; (4) Restricted Payments that are permitted under Section 4.07 hereof; (5) the issuance or sale of Equity Interests (other than Disqualified Stock) of the Company; and (6) transactions pursuant to the provisions of the Governance Agreement and the Stockholders' Agreement, as the same are in effect on the date hereof. Section 4.12. Liens. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, directly or indirectly, create, incur, assume or suffer to exist any Lien securing Indebtedness or trade payables on any asset now owned or hereafter acquired, or any income or profits therefrom or assign or convey any right to receive income therefrom, except Permitted Liens. Section 4.13. Business Activities. The Company shall not, and shall not permit any Subsidiary to, engage in any business other than Permitted Businesses, except to the extent as would not be material to the Company and its Subsidiaries taken as a whole. Section 4.14. Corporate Existence. Subject to Article 5 hereof, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect: (1) its corporate existence, and the corporate, partnership or other existence of each of its Subsidiaries, in accordance with the respective organizational documents (as the same may be amended from time to time) of the Company or any such Subsidiary and (2) the rights (charter and statutory), licenses and franchises of the Company and its Subsidiaries; provided, however, that the Company shall not be required to preserve any such right, license or franchise, or the corporate, partnership or other existence of any of its Subsidiaries, if the Board of Directors shall determine that the preservation thereof is no longer desirable in the conduct of the business of the Company and its Subsidiaries, taken as a whole, and that the loss thereof is not adverse in any material respect to the Holders of the Notes. Section 4.15. Offer to Repurchase Upon Change of Control. If a Change of Control occurs, the Company shall make an offer (a "Change of Control Offer") to each Holder to repurchase all or any part (equal to $1,000 or an integral multiple thereof) of each Holder's Notes at a purchase price, in cash, equal to 101% of the aggregate principal amount of the Notes repurchased, plus accrued and unpaid interest thereon, if any, (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), to the 55

date of purchase (the "Change of Control Payment"). Within 30 days following any Change of Control, the Company shall mail a notice to each Holder describing the transaction or transactions that constitute a change of control and stating: (1) that the Change of Control Offer is being made pursuant to this covenant and that all Notes tendered will be accepted for payment; (2) the purchase price and the purchase date, which shall be no earlier than 30 days and no later than 60 days from the date such notice is mailed (the "Change of Control Payment Date"); (3) that any Note not tendered will continue to accrue interest; (4) that, unless the Company defaults in the payment of the Change of Control Payment, all Notes accepted for payment pursuant to the Change of Control Offer shall cease to accrue interest after the Change of Control Payment Date; (5) that Holders electing to have any Notes purchased pursuant to a Change of Control Offer will be required to surrender the Notes, with the form entitled "Option of Holder to Elect Purchase" on the reverse of the Notes completed, to the Paying Agent at the address specified in the notice prior to the close of business on the third Business Day preceding the Change of Control Payment Date; (6) that Holders will be entitled to withdraw their election if the Paying Agent receives, not later than the close of business on the second Business Day preceding the Change of Control Payment Date, a telegram, telex, facsimile transmission or letter setting forth the name of the Holder, the principal amount of Notes delivered for purchase, and a statement that such Holder is withdrawing his election to have the Notes purchased; and (7) that Holders whose Notes are being purchased only in part will be issued new Notes equal in principal amount to the unpurchased portion of the Notes surrendered, which unpurchased portion must be equal to $1,000 in principal amount or an integral multiple thereof. On the Change of Control Payment Date, the Company shall, to the extent lawful, (1) accept for payment all Notes or portions of the Notes properly tendered pursuant to the Change of Control Offer; (2) deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of all Notes or portions of the Notes so tendered; and (3) deliver or cause to be delivered to the Trustee the Notes so accepted together with an Officers' Certificate stating the aggregate principal amount of Notes or portions thereof being purchased by the Company. The Paying Agent shall promptly mail to each Holder of Notes properly tendered payment in an amount equal to the purchase price for the Notes (the "Change of Control Payment"), and the Trustee shall promptly authenticate and mail (or cause to be transferred by book entry) to each Holder a new Note equal in principal amount to any unpurchased portion of the Notes surrendered by such Holder, if 56

any; provided, that each such new Note shall be in a principal amount of $1,000 or an integral multiple thereof. The Company shall publicly announce the results of the Change of Control Offer on or as soon as practicable after the Change of Control Payment Date. The Change of Control provisions described above shall be applicable whether or not any other provisions of this Indenture are applicable. The Company shall comply with the requirements of Section 14(e) of the Exchange Act and any other securities laws or regulations to the extent those laws and regulations are applicable to any Change of Control Offer. If the provisions of any of the applicable securities laws or securities regulations conflict with the provisions of this Section 4.15, the Company shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under this Section 4.15 by virtue of the compliance. The Company shall not be required to make a Change of Control Offer upon a Change of Control if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in this Indenture applicable to a Change of Control Offer made by the Company and purchases all Notes properly tendered and not withdrawn under such Change of Control Offer. The provisions under this Indenture relating to the Company's obligation to make an offer to repurchase the Notes as a result of a Change of Control may be waived or modified with the written consent of the Holders of a at least a majority in principal amount of the Notes then outstanding. Section 4.16. Sale and Leaseback Transactions. The Company shall not, and shall not permit any of its Restricted Subsidiaries to, enter into any sale and leaseback transaction; provided, however, that the Company or any of its Restricted Subsidiaries may enter into a sale and leaseback transaction if: (1) the Company or such Restricted Subsidiary, as applicable, could have: (a) incurred Indebtedness in an amount equal to the Attributable Debt relating to such sale and leaseback transaction pursuant to the Debt to Adjusted Consolidated Cash Flow Ratio test set forth in the first paragraph of Section 4.09 hereof; or (b) incurred a Lien to secure such Indebtedness pursuant to the provisions of Section 4.12 hereof; (2) the gross cash proceeds of such sale and leaseback transaction are at least equal to the fair market value (as determined in good faith by the Board of Directors) of the property that is the subject of the sale and leaseback transaction; and (3) the transfer of assets in the sale and leaseback transaction is permitted by, and the Company applies the proceeds of such transaction in compliance with, Section 4.10 hereof. Section 4.17. Limitation on Issuances and Sales of Capital Stock of Restricted Subsidiaries. The Company: (1) shall not, and shall not permit any of its Restricted Subsidiaries to, transfer, convey, sell, lease or otherwise dispose of any Equity Interests in any Restricted Subsidiary of the 57

Company to any Person (other than the Company or a Wholly Owned Restricted Subsidiary of the Company); and (2) shall not permit any of its Restricted Subsidiaries to issue any of its Equity Interests (other than, if necessary, shares of its Capital Stock constituting directors' qualifying shares) to any Person other than to the Company or a Wholly Owned Restricted Subsidiary of the Company, unless, in each such case: (a) as a result of such transfer, conveyance, sale, lease or other disposition or issuance, such Restricted Subsidiary no longer constitutes a Subsidiary; and (b) the cash Net Proceeds from such transfer, conveyance, sale, lease or other disposition or issuance are applied in accordance with Section 4.10 hereof. Notwithstanding the foregoing, the issuance or sale of shares of Capital Stock of any Restricted Subsidiary of the Company will not violate the provisions of the immediately preceding sentence if such shares are issued or sold in connection with (x) the formation or capitalization of a Restricted Subsidiary or (y) a single transaction or a series of substantially contemporaneous transactions whereby such Restricted Subsidiary becomes a Restricted Subsidiary of the Company by reason of the acquisition of securities or assets from another Person. Section 4.18. Limitation on Issuances of Guarantees of Indebtedness. The Company shall not permit any Restricted Subsidiary, directly or indirectly, to Guarantee or pledge any assets to secure the payment of any other Indebtedness of the Company unless such Subsidiary simultaneously executes and delivers a supplemental indenture to this Indenture governing the Notes providing for the Guarantee of the payment of the Notes by such Subsidiary, which Guarantee shall be senior to or pari passu with such Subsidiary's Guarantee of or pledge to secure such other Indebtedness. Notwithstanding the foregoing, any Guarantee by a Subsidiary of the Notes shall provide by its terms that it shall be automatically and unconditionally released and discharged upon any sale, exchange or transfer, to any Person other than a Subsidiary of the Company, of all of the Company's stock in, or all or substantially all the assets of, such Subsidiary, which sale, exchange or transfer is made in compliance with the applicable provisions of this Indenture. The form of such Guarantee is attached as Exhibit F hereto. ARTICLE 5 SUCCESSORS Section 5.01. Merger, Consolidation, or Sale of Assets. The Company shall not: (a) consolidate or merge with or into (whether or not the Company is the surviving corporation); or (b) sell, assign, transfer, lease, convey or otherwise dispose of all or substantially all of its properties or assets in one or more related transactions, to another corporation, Person or entity, unless: 58

(i) either (A) the Company is the surviving corporation; or (B) the entity or the Person formed by or surviving any such consolidation or merger (if other than the Company) or to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made is a corporation organized or existing under the laws of the United States, any state thereof or the District of Columbia; (ii) the entity or Person formed by or surviving any such consolidation or merger (if other than the Company) or the entity or Person to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made assumes all the Obligations of the Company under the Notes and this Indenture pursuant to a supplemental indenture in a form reasonably satisfactory to the Trustee; (iii) immediately after such transaction no Default exists; and (iv) except in the case of (A) a merger of the Company with or into a Wholly Owned Restricted Subsidiary of the Company and (B) a merger entered into solely for the purpose of reincorporating the Company in another jurisdiction: (x) in the case of a merger or consolidation in which the Company is the surviving corporation, the Company's Debt to Adjusted Consolidated Cash Flow Ratio at the time of the transaction, after giving pro forma effect to the transaction as of such date for balance sheet purposes and as if the transaction had occurred at the beginning of the most recently ended four full fiscal quarter period of the Company for which internal financial statements are available for income statement purposes, would have been less than the Company's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such transaction, or (y) in the case of any other such transaction, the Debt to Adjusted Consolidated Cash Flow of the entity or Person formed by or surviving any such consolidation or merger (if other than the Company), or to which the sale, assignment, transfer, lease, conveyance or other disposition shall have been made, at the time of the transaction, after giving pro forma effect to the transaction as of such date for balance sheet purposes and as if such transaction had occurred at the beginning of the most recently ended four full fiscal quarter period of such entity or Person for which internal financial statements are available for income statement purposes, would have been less than the Company's Debt to Adjusted Consolidated Cash Flow Ratio for the same period without giving pro forma effect to such transaction; provided that for purposes of determining the Debt to Adjusted Consolidated Cash Flow Ratio of any entity or Person for purposes of this clause (d) the entity or Person will be substituted for the Company in the definition of Debt to Adjusted Consolidated Cash Flow Ratio and the defined terms included therein under Section 4.09 hereof. Section 5.02. Successor Corporation Substituted. Upon any consolidation or merger, or any sale, assignment, transfer, lease, conveyance or other disposition of all or substantially all of the assets of the Company in accordance with Section 5.01 hereof, the successor corporation formed by such consolidation or into or with which the Company is merged or to which such sale, assignment, transfer, lease, conveyance or other disposition is made shall succeed to, and be substituted for (so that from and after the date of such consolidation, merger, sale, lease, conveyance or other disposition, the provisions of this Indenture referring to the "Company" shall refer instead to the successor corporation and not to the Company), and may exercise every right and 59

power of the Company under this Indenture with the same effect as if such successor Person had been named as the Company herein; provided, however, that the predecessor Company shall not be relieved from the obligation to pay the principal of and interest on the Notes except in the case of a sale of all of the Company's assets that meets the requirements of Section 5.01 hereof. ARTICLE 6 DEFAULTS AND REMEDIES Section 6.01. Events of Default. Each of the following constitutes an Event of Default: (1) default for 30 days in the payment when due of interest on the Notes; (2) default in payment when due of the principal of or premium, if any, on the Notes; (3) failure by the Company or any of its Subsidiaries to comply with the provisions described under Article 5 hereof or failure by the Company to consummate a Change of Control Offer or Asset Sale Offer in accordance with the provisions of this Indenture; (4) failure by the Company or any of its Subsidiaries for 30 days after notice by the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding voting as a single class, to comply with any of its other agreements in the Indenture or the Notes; (5) default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by the Company or any of its Significant Subsidiaries (or the payment of which is guaranteed by the Company or any of its Significant Subsidiaries) whether such Indebtedness or guarantee now exists, or is created after the date of this Indenture, which default: (a) is caused by a failure to pay principal of or premium, if any, or interest on the Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of the default (a "Payment Default"); or (b) results in the acceleration of the Indebtedness prior to its express maturity and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $20.0 million or more; (6) failure by the Company or any of its Significant Subsidiaries to pay final judgments aggregating in excess of $20.0 million, which judgments are not paid, discharged or stayed for a period of 60 days; or (7) the Company or any of its Restricted Subsidiaries pursuant to or within the meaning of Bankruptcy Law: (a) commences a voluntary case, 60

(b) consents to the entry of an order for relief against it in an involuntary case, (c) consents to the appointment of a Custodian of it or for all or substantially all of its property, (d) makes a general assignment for the benefit of its creditors, or (e) generally is not paying its debts as they become due; or (8) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that: (a) is for relief against the Company or any of its Restricted Subsidiaries in an involuntary case; (b) appoints a Custodian of the Company or any of its Restricted Subsidiaries or for all or substantially all of the property of the Company or any of its Restricted Subsidiaries; or (c) orders the liquidation of the Company or any of its Restricted Subsidiaries; and the order or decree remains unstayed and in effect for 60 consecutive days. Section 6.02. Acceleration. If any Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the then outstanding Notes may declare all the Notes to be due and payable immediately. Upon any such declaration, the principal of, and accrued and unpaid interest if any, on such Notes shall become due and payable immediately. Notwithstanding the foregoing, if an Event of Default specified in clause (7) or (8) of Section 6.01 hereof occurs with respect to the Company or any of its Restricted Subsidiaries, all outstanding Notes shall be due and payable immediately without further action or notice. The Holders of a majority in aggregate principal amount of the then outstanding Notes by written notice to the Trustee may on behalf of all of the Holders rescind an acceleration and its consequences if the rescission would not conflict with any judgment or decree and if all existing Events of Default (except nonpayment of principal, interest or premium that has become due solely because of the acceleration) have been cured or waived. Section 6.03. Other Remedies. If an Event of Default occurs and is continuing, the Trustee may pursue any available remedy to collect the payment of principal of, premium, if any, and interest on the Notes or to enforce the performance of any provision of the Notes or this Indenture. The Trustee may maintain a proceeding even if it does not possess any of the Notes or does not produce any of them in the proceeding. A delay or omission by the Trustee or any Holder of a Note in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or 61

constitute a waiver of or acquiescence in the Event of Default. All remedies are cumulative to the extent permitted by law. Section 6.04. Waiver of Past Defaults. Holders of not less than a majority in aggregate principal amount of the then outstanding Notes by notice to the Trustee may on behalf of the Holders of all of the Notes waive an existing Default or Event of Default and its consequences hereunder, except a continuing Default or Event of Default in the payment of the principal of, premium, if any, or interest on, the Notes (including in connection with an offer to purchase) (provided, however, that the Holders of a majority in aggregate principal amount of the then outstanding Notes may rescind an acceleration and its consequences, including any related payment default that resulted from such acceleration). Upon any such waiver, such Default shall cease to exist, and any Event of Default arising therefrom shall be deemed to have been cured for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other Default or impair any right consequent thereon. Section 6.05. Control by Majority. Holders of a majority in principal amount of the then outstanding Notes may direct the time, method and place of conducting any proceeding for exercising any remedy available to the Trustee or exercising any trust or power conferred on it. However, the Trustee may refuse to follow any direction that conflicts with law or this Indenture that the Trustee determines may be unduly prejudicial to the rights of other Holders of Notes or that may involve the Trustee in personal liability. Section 6.06. Limitation on Suits. A Holder of a Note may pursue a remedy with respect to this Indenture or the Notes only if: (1) the Holder of a Note gives to the Trustee written notice of a continuing Event of Default; (2) the Holders of at least 25% in principal amount of the then outstanding Notes make a written request to the Trustee to pursue the remedy; (3) such Holder of a Note or Holders of Notes offer and, if requested, provide to the Trustee indemnity satisfactory to the Trustee against any loss, liability or expense; (4) the Trustee does not comply with the request within 60 days after receipt of the request and the offer and, if requested, the provision of indemnity; and (5) during such 60-day period the Holders of a majority in principal amount of the then outstanding Notes do not give the Trustee a direction inconsistent with the request. A Holder of a Note may not use this Indenture to prejudice the rights of another Holder of a Note or to obtain a preference or priority over another Holder of a Note. Section 6.07. Rights of Holders of Notes to Receive Payment. Notwithstanding any other provision of this Indenture, the right of any Holder of a Note to receive payment of principal of, premium, if any, and interest on the Note, on or after the respective due 62

dates expressed in the Note (including in connection with an offer to purchase), or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder. Section 6.08. Collection Suit by Trustee. If an Event of Default specified in Section 6.01(a) or (b) occurs and is continuing, the Trustee is authorized to recover judgment in its own name and as trustee of an express trust against the Company for the whole amount of principal of, premium, if any, and interest remaining unpaid on the Notes and interest on overdue principal and, to the extent lawful, interest and such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel. Section 6.09. Trustee May File Proofs of Claim. The Trustee is authorized to file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and the Holders of the Notes allowed in any judicial proceedings relative to the Company (or any other obligor upon the Notes), its creditors or its property and shall be entitled and empowered to collect, receive and distribute any money or other property payable or deliverable on any such claims and any Custodian in any such judicial proceeding is hereby authorized by each Holder to make such payments to the Trustee, and in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due to it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof. To the extent that the payment of any such compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, and any other amounts due the Trustee under Section 7.07 hereof out of the estate in any such proceeding, shall be denied for any reason, payment of the same shall be secured by a Lien on, and shall be paid out of, any and all distributions, dividends, money, securities and other properties that the Holders may be entitled to receive in such proceeding whether in liquidation or under any plan of reorganization or arrangement or otherwise. Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Holder any plan of reorganization, arrangement, adjustment or composition affecting the Notes or the rights of any Holder, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding. Section 6.10. Priorities. If the Trustee collects any money pursuant to this Article, it shall pay out the money in the following order: First: to the Trustee, its agents and attorneys for amounts due under Section 7.07 hereof, including payment of all compensation, expense and liabilities incurred, and all advances made, by the Trustee and the costs and expenses of collection; Second: to Holders of Notes for amounts due and unpaid on the Notes for principal, premium, if any, and interest, ratably, without preference or priority of any kind, according to the amounts due and payable on the Notes for principal, premium, if any and interest, respectively; and 63

Third: to the Company or to such party as a court of competent jurisdiction shall direct. The Trustee may fix a record date and payment date for any payment to Holders of Notes pursuant to this Section 6.10. Section 6.11. Undertaking for Costs. In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as a Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys' fees, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section does not apply to a suit by the Trustee, a suit by a Holder of a Note pursuant to Section 6.07 hereof, or a suit by Holders of more than 10% in principal amount of the then outstanding Notes. ARTICLE 7 TRUSTEE Section 7.01. Duties of Trustee. (a) If an Event of Default has occurred and is continuing, the Trustee shall exercise such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in its exercise, as a prudent person would exercise or use under the circumstances in the conduct of such person's own affairs. (b) Except during the continuance of an Event of Default: (i) the duties of the Trustee shall be determined solely by the express provisions of this Indenture and the Trustee need perform only those duties that are specifically set forth in this Indenture and no others, and no implied covenants or obligations shall be read into this Indenture against the Trustee; and (ii) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture. However, the Trustee shall examine the certificates and opinions to determine whether or not they conform to the requirements of this Indenture. (c) The Trustee may not be relieved from liabilities for its own negligent action, its own negligent failure to act, or its own willful misconduct, except that: (i) this paragraph does not limit the effect of paragraph (b) of this Section; (ii) the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer, unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and 64

(iii) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05 hereof. (d) Whether or not therein expressly so provided, every provision of this Indenture that in any way relates to the Trustee is subject to paragraphs (a), (b), and (c) of this Section. (e) No provision of this Indenture shall require the Trustee to expend or risk its own funds or incur any liability. The Trustee shall be under no obligation to exercise any of its rights and powers under this Indenture at the request of any Holders, unless such Holder shall have offered to the Trustee security and indemnity satisfactory to it against any loss, liability or expense. (f) The Trustee shall not be liable for interest on any money received by it except as the Trustee may agree in writing with the Company. Money held in trust by the Trustee need not be segregated from other funds except to the extent required by law. Section 7.02. Rights of Trustee. (a) The Trustee may conclusively rely upon any document believed by it to be genuine and to have been signed or presented by the proper Person. The Trustee need not investigate any fact or matter stated in the document. (b) Before the Trustee acts or refrains from acting, it may require an Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on such Officers' Certificate or Opinion of Counsel. The Trustee may consult with counsel and the written and oral advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection from liability in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon. (c) The Trustee may act through its attorneys and agents and shall not be responsible for the misconduct or negligence of any agent appointed with due care. (d) The Trustee shall not be liable for any action it takes or omits to take in good faith that it believes to be authorized or within the rights or powers conferred upon it by this Indenture. (e) Unless otherwise specifically provided in this Indenture, any demand, request, direction or notice from the Company shall be sufficient if signed by an Officer of the Company. (f) The Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders unless such Holders shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities that might be incurred by it in compliance with such request or direction. Section 7.03. Individual Rights of Trustee. The Trustee in its individual or any other capacity may become the owner or pledgee of Notes and may otherwise deal with the Company or any Affiliate of the Company with the same rights it would have if it were not Trustee. However, in the event that the Trustee acquires any conflicting interest it must eliminate such conflict within 90 days, apply to the SEC for permission to continue as trustee or 65

resign. Any Agent may do the same with like rights and duties. The Trustee is also subject to Sections 7.10 and 7.11 hereof. Section 7.04. Trustee's Disclaimer. The Trustee shall not be responsible for and makes no representation as to the validity or adequacy of this Indenture or the Notes, it shall not be accountable for the Company's use of the proceeds from the Notes or any money paid to the Company or upon the Company's direction under any provision of this Indenture, it shall not be responsible for the use or application of any money received by any Paying Agent other than the Trustee, and it shall not be responsible for any statement or recital herein or any statement in the Notes or any other document in connection with the sale of the Notes or pursuant to this Indenture other than its certificate of authentication. Section 7.05. Notice of Defaults. If a Default or Event of Default occurs and is continuing and if it is known to the Trustee, the Trustee shall mail to Holders of Notes a notice of the Default or Event of Default within 90 days after it occurs. Except in the case of a Default or Event of Default in payment of principal of, premium, if any, or interest on any Note, the Trustee may withhold the notice if and so long as a committee of its Responsible Officers in good faith determines that withholding the notice is in the interests of the Holders of the Notes. Section 7.06. Reports by Trustee to Holders of the Notes. Within 60 days after each May 1 beginning with the May 1 following the date of this Indenture, and for so long as Notes remain outstanding, the Trustee shall mail to the Holders of the Notes a brief report dated as of such reporting date that complies with TIA (s) 313(a) (but if no event described in TIA (s) 313(a) has occurred within the twelve months preceding the reporting date, no report need be transmitted). The Trustee also shall comply with TIA (s) 313(b). The Trustee shall also transmit by mail all reports as required by TIA (s) 313(c). A copy of each report at the time of its mailing to the Holders of Notes shall be mailed to the Company and filed with the SEC and each stock exchange on which the Notes are listed in accordance with TIA (S). 313(d). The Company shall promptly notify the Trustee when the Notes are listed on any stock exchange. Section 7.07. Compensation and Indemnity. The Company shall pay to the Trustee from time to time reasonable compensation for its acceptance of this Indenture and services hereunder. The Trustee's compensation shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee promptly upon request for all reasonable disbursements, advances and expenses incurred or made by it in addition to the compensation for its services. Such expenses shall include the reasonable compensation, disbursements and expenses of the Trustee's agents and counsel. The Company shall indemnify the Trustee against any and all losses, liabilities or expenses incurred by it arising out of or in connection with the acceptance or administration of its duties under this Indenture, including the costs and expenses of enforcing this Indenture against the Company (including 66

this Section 7.07) and defending itself against any claim (whether asserted by the Company or any Holder or any other person) or liability in connection with the exercise or performance of any of its powers or duties hereunder, except to the extent any such loss, liability or expense may be attributable to its negligence or bad faith. The Trustee shall notify the Company promptly of any claim for which it may seek indemnity. Failure by the Trustee to so notify the Company shall not relieve the Company of its obligations hereunder. The Company shall defend the claim and the Trustee shall cooperate in the defense. The Trustee may have separate counsel and the Company shall pay the reasonable fees and expenses of such counsel. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld. The obligations of the Company under this Section 7.07 shall survive the satisfaction and discharge of this Indenture. To secure the Company's payment obligations in this Section, the Trustee shall have a Lien prior to the Notes on all money or property held or collected by the Trustee, except that held in trust to pay principal and interest on particular Notes. Such Lien shall survive the satisfaction and discharge of this Indenture. When the Trustee incurs expenses or renders services after an Event of Default specified in Section 6.01(g) or (h) hereof occurs, the expenses and the compensation for the services (including the fees and expenses of its agents and counsel) are intended to constitute expenses of administration under any Bankruptcy Law. The Trustee shall comply with the provisions of TIA ss. 313(b)(2) to the extent applicable. Section 7.08. Replacement of Trustee. A resignation or removal of the Trustee and appointment of a successor Trustee shall become effective only upon the successor Trustee's acceptance of appointment as provided in this Section. The Trustee may resign in writing at any time and be discharged from the trust hereby created by so notifying the Company. The Holders of a majority in principal amount of the then outstanding Notes may remove the Trustee by so notifying the Trustee and the Company in writing. The Company may remove the Trustee if: (a) the Trustee fails to comply with Section 7.10 hereof; (b) the Trustee is adjudged a bankrupt or an insolvent or an order for relief is entered with respect to the Trustee under any Bankruptcy Law; (c) a Custodian or public officer takes charge of the Trustee or its property; or (d) the Trustee becomes incapable of acting. If the Trustee resigns or is removed or if a vacancy exists in the office of Trustee for any reason, the Company shall promptly appoint a successor Trustee. Within one year after the successor Trustee takes office, the Holders of a majority in principal amount of the then outstanding Notes may appoint a successor Trustee to replace the successor Trustee appointed by the Company. 67

If a successor Trustee does not take office within 60 days after the retiring Trustee resigns or is removed, the retiring Trustee, the Company, or the Holders of at least 10% in principal amount of the then outstanding Notes may petition any court of competent jurisdiction for the appointment of a successor Trustee. If the Trustee, after written request by any Holder who has been a Holder for at least six months, fails to comply with Section 7.10, such Holder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee. A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company. Thereupon, the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Holders. The retiring Trustee shall promptly transfer all property held by it as Trustee to the successor Trustee, provided all sums owing to the Trustee hereunder have been paid and subject to the Lien provided for in Section 7.07 hereof. Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the Company's obligations under Section 7.07 hereof shall continue for the benefit of the retiring Trustee. Section 7.09. Successor Trustee by Merger, etc. If the Trustee consolidates, merges or converts into, or transfers all or substantially all of its corporate trust business to, another corporation, the successor corporation without any further act shall be the successor Trustee. Section 7.10. Eligibility; Disqualification. There shall at all times be a Trustee hereunder that is a corporation organized and doing business under the laws of the United States of America or of any state thereof that is authorized under such laws to exercise corporate trustee power, that is subject to supervision or examination by federal or state authorities and that has a combined capital and surplus of at least $75 million as set forth in its most recent published annual report of condition. This Indenture shall always have a Trustee who satisfies the requirements of TIA (s) 310(a)(1), (2) and (5). The Trustee is subject to TIA (s) 310(b). Section 7.11. Preferential Collection of Claims Against Company. The Trustee is subject to TIA (s) 311(a), excluding any creditor relationship listed in TIA (s) 311(b). A Trustee who has resigned or been removed shall be subject to TIA (s) 311(a) to the extent indicated therein. ARTICLE 8 LEGAL DEFEASANCE AND COVENANT DEFEASANCE Section 8.01. Option to Effect Legal Defeasance or Covenant Defeasance. 68

The Company may, at the option of its Board of Directors evidenced by a resolution set forth in an Officers' Certificate, at any time, elect to have either Section 8.02 or 8.03 hereof be applied to all outstanding Notes upon compliance with the conditions set forth below in this Article Eight. Section 8.02. Legal Defeasance and Discharge. Upon the Company's exercise under Section 8.01 hereof of the option applicable to this Section 8.02, the Company shall, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, be deemed to have been discharged from its obligations with respect to all outstanding Notes on the date the conditions set forth below are satisfied (hereinafter, "Legal Defeasance"). For this purpose, Legal Defeasance means that the Company shall be deemed to have paid and discharged the entire Indebtedness represented by the outstanding Notes, which shall thereafter be deemed to be "outstanding" only for the purposes of Section 8.05 hereof and the other Sections of this Indenture referred to in (1) and (2) below, and to have satisfied all its other obligations under such Notes and this Indenture (and the Trustee, on demand of and at the expense of the Company, shall execute proper instruments acknowledging the same), except for the following provisions which shall survive until otherwise terminated or discharged hereunder: (1) the rights of Holders of outstanding Notes to receive solely from the trust fund described in Section 8.04 hereof, and as more fully set forth in such Section, payments in respect of the principal of, premium, if any, and interest on such Notes when such payments are due; (2) the Company's obligations with respect to such Notes under Article 2 and Section 4.02 hereof; (3) the rights, powers, trusts, duties and immunities of the Trustee hereunder and the Company's obligations in connection therewith; and (4) this Article Eight. Subject to compliance with this Article Eight, the Company may exercise its option under this Section 8.02 notwithstanding the prior exercise of its option under Section 8.03 hereof. Section 8.03. Covenant Defeasance. Upon the Company's exercise under Section 8.01 hereof of the option applicable to this Section 8.03, the Company shall, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, be released from its obligations under the covenants contained in Sections 4.07, 4.08, 4.09, 4.10, 4.11, 4.12, 4.13, 4.15, 4.16, 4.17 and 4.18 hereof and clause (4) of Section 5.01 hereof with respect to the outstanding Notes on and after the date the conditions set forth in Section 8.04 are satisfied (hereinafter, "Covenant Defeasance"), and the Notes shall thereafter be deemed not "outstanding" for the purposes of any direction, waiver, consent or declaration or act of Holders (and the consequences of any thereof) in connection with such covenants, but shall continue to be deemed "outstanding" for all other purposes hereunder (it being understood that such Notes shall not be deemed outstanding for accounting purposes). For this purpose, Covenant Defeasance means that, with respect to the outstanding Notes, the Company may omit to comply with and shall have no liability in respect of any term, condition or limitation set forth in any such covenant, whether directly or indirectly, by reason of any reference elsewhere herein to any such covenant or by reason of any reference in any such covenant to any other 69

provision herein or in any other document and such omission to comply shall not constitute a Default or an Event of Default under Section 6.01 hereof, but, except as specified above, the remainder of this Indenture and such Notes shall be unaffected thereby. In addition, upon the Company's exercise under Section 8.01 hereof of the option applicable to this Section 8.03 hereof, subject to the satisfaction of the conditions set forth in Section 8.04 hereof, Sections 6.01(3) through 6.01(6) hereof shall not constitute Events of Default. Section 8.04. Conditions to Legal or Covenant Defeasance. The following shall be the conditions to the application of either Section 8.02 or 8.03 hereof to the outstanding Notes: In order to exercise either Legal Defeasance or Covenant Defeasance: (1) the Company must irrevocably deposit with the Trustee, in trust, for the benefit of the Holders, cash in United States dollars, non-callable Government Securities, or a combination thereof, in such amounts as will be sufficient, in the opinion of a nationally recognized firm of independent public accountants, to pay the principal of, premium, if any, and interest on the outstanding Notes on the stated date for payment thereof or on the applicable redemption date, as the case may be; (2) in the case of an election under Section 8.02 hereof, the Company shall have delivered to the Trustee an Opinion of Counsel in the United States reasonably acceptable to the Trustee confirming that: (a) the Company has received from, or there has been published by, the Internal Revenue Service a ruling; or (b) since the date of this Indenture, there has been a change in the applicable federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Holders of the outstanding Notes will not recognize income, gain or loss for federal income tax purposes as a result of such Legal Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Legal Defeasance had not occurred; (3) in the case of an election under Section 8.03 hereof, the Company shall have delivered to the Trustee an Opinion of Counsel in the United States reasonably acceptable to the Trustee confirming that the Holders of the outstanding Notes will not recognize income, gain or loss for federal income tax purposes as a result of such Covenant Defeasance and will be subject to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such Covenant Defeasance had not occurred; (4) no Default or Event of Default shall have occurred and be continuing either: (a) on the date of such deposit (other than a Default or Event of Default resulting from the borrowing of funds to be applied to such deposit); or (b) insofar as Sections 6.01(7) or 6.01(8) hereof are concerned, at any time in the period ending on the 91st day after the date of deposit; 70

(5) such Legal Defeasance or Covenant Defeasance shall not result in a breach or violation of, or constitute a default under, any material agreement or instrument (other than this Indenture) to which the Company or any of its Restricted Subsidiaries is a party or by which the Company or any of its Restricted Subsidiaries is bound; (6) the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that on the 91st day following the deposit, the trust funds will not be subject to the effect of any applicable bankruptcy, insolvency, reorganization or similar laws affecting creditors' rights generally; (7) the Company shall have delivered to the Trustee an Officers' Certificate stating that the deposit was not made by the Company with the intent of preferring the Holders over any other creditors of the Company or with the intent of defeating, hindering, delaying or defrauding any other creditors of the Company or others; and (8) the Company shall have delivered to the Trustee an Officers' Certificate and an Opinion of Counsel, each stating that all conditions precedent provided for or relating to the Legal Defeasance or the Covenant Defeasance have been complied with. Section 8.05. Deposited Money and Government Securities to be Held in Trust; Other Miscellaneous Provisions. Subject to Section 8.06 hereof, all money and non-callable Government Securities (including the proceeds thereof) deposited with the Trustee (or other qualifying trustee, collectively for purposes of this Section 8.05, the "Trustee") pursuant to Section 8.04 hereof in respect of the outstanding Notes shall be held in trust and applied by the Trustee, in accordance with the provisions of such Notes and this Indenture, to the payment, either directly or through any Paying Agent (including the Company acting as Paying Agent) as the Trustee may determine, to the Holders of such Notes of all sums due and to become due thereon in respect of principal, premium, if any, and interest, but such money need not be segregated from other funds except to the extent required by law. The Company shall pay and indemnify the Trustee against any tax, fee or other charge imposed on or assessed against the cash or non-callable Government Securities deposited pursuant to Section 8.04 hereof or the principal and interest received in respect thereof other than any such tax, fee or other charge which by law is for the account of the Holders of the outstanding Notes. Anything in this Article Eight to the contrary notwithstanding, the Trustee shall deliver or pay to the Company from time to time upon the request of the Company any money or non-callable Government Securities held by it as provided in Section 8.04 hereof which, in the opinion of a nationally recognized firm of independent public accountants expressed in a written certification thereof delivered to the Trustee (which may be the opinion delivered under Section 8.04(a) hereof), are in excess of the amount thereof that would then be required to be deposited to effect an equivalent Legal Defeasance or Covenant Defeasance. Section 8.06. Repayment to Company. Any money deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the principal of, premium, if any, or interest on any Note and remaining unclaimed for two years after such principal, and premium, if any, or interest has become due and 71

payable shall be paid to the Company on its request or (if then held by the Company) shall be discharged from such trust; and the Holder of such Note shall thereafter look only to the Company for payment thereof, and all liability of the Trustee or such Paying Agent with respect to such trust money, and all liability of the Company as trustee thereof, shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, may at the expense of the Company cause to be published once, in the New York Times and The Wall Street Journal (national edition), notice that such money remains unclaimed and that, after a date specified therein, which shall not be less than 30 days from the date of such notification or publication, any unclaimed balance of such money then remaining will be repaid to the Company. Section 8.07. Reinstatement. If the Trustee or Paying Agent is unable to apply any United States dollars or non-callable Government Securities in accordance with Section 8.02 or 8.03 hereof, as the case may be, by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, then the Company's obligations under this Indenture and the Notes shall be revived and reinstated as though no deposit had occurred pursuant to Section 8.02 or 8.03 hereof until such time as the Trustee or Paying Agent is permitted to apply all such money in accordance with Section 8.02 or 8.03 hereof, as the case may be; provided, however, that, if the Company makes any payment of principal of, premium, if any, or interest on any Note following the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of such Notes to receive such payment from the money held by the Trustee or Paying Agent. ARTICLE 9 AMENDMENT, SUPPLEMENT AND WAIVER Section 9.01. Without Consent of Holders of Notes. Notwithstanding Section 9.02 of this Indenture, the Company and the Trustee may amend or supplement this Indenture or the Notes without the consent of any Holder of Notes: (1) to cure any ambiguity, defect or inconsistency; (2) to provide for uncertificated Notes in addition to or in place of certificated Notes or to alter the provisions of Article 2 hereof (including the related definitions) in a manner that does not materially adversely affect any Holder; (3) to provide for the assumption of the Company's obligations to the Holders of the Notes by a successor to the Company pursuant to Article 5 hereof; (4) to make any change that would provide any additional rights or benefits to the Holders of the Notes or that does not adversely affect the legal rights hereunder of any Holder of Notes; (5) to comply with requirements of the SEC in order to effect or maintain the qualification of this Indenture under the TIA; (6) to provide for the issuance of the Additional Notes in accordance with the limitations set forth in this Indenture as of the date hereof. 72

Upon the request of the Company accompanied by a resolution of its Board of Directors authorizing the execution of any such amended or supplemental Indenture, and upon receipt by the Trustee of the documents described in Section 7.02 hereof, the Trustee shall join with the Company in the execution of any amended or supplemental Indenture authorized or permitted by the terms of this Indenture and to make any further appropriate agreements and stipulations that may be therein contained, but the Trustee shall not be obligated to enter into such amended or supplemental Indenture that affects its own rights, duties or immunities under this Indenture or otherwise. Section 9.02. With Consent of Holders of Notes. Except as provided below in this Section 9.02, the Company and the Trustee may amend or supplement this Indenture (including Section 3.09, 4.10 and 4.15 hereof) and the Notes with the consent of the Holders of at least a majority in principal amount of the Notes then outstanding, voting as a single class, (including, without limitation, consents obtained in connection with a tender offer or exchange offer for, or purchase of, the Notes), and, subject to Sections 6.04 and 6.07 hereof, any existing Default or Event of Default (other than a Default or Event of Default in the payment of the principal of, premium, if any, or interest on the Notes, except a payment default resulting from an acceleration that has been rescinded) or compliance with any provision of this Indenture or the Notes may be waived with the consent of the Holders of a majority in principal amount of the then outstanding Notes, voting as a single class, (including consents obtained in connection with a tender offer or exchange offer for, or purchase of, the Notes). Section 2.08 hereof shall determine which Notes are considered to be "outstanding" for purposes of this Section 9.02. Upon the request of the Company accompanied by a resolution of its Board of Directors authorizing the execution of any such amended or supplemental Indenture, and upon the filing with the Trustee of evidence satisfactory to the Trustee of the consent of the Holders of Notes as aforesaid, and upon receipt by the Trustee of the documents described in Section 7.02 hereof, the Trustee shall join with the Company in the execution of such amended or supplemental Indenture unless such amended or supplemental Indenture directly affects the Trustee's own rights, duties or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion, but shall not be obligated to, enter into such amended or supplemental Indenture. It shall not be necessary for the consent of the Holders of Notes under this Section 9.02 to approve the particular form of any proposed amendment or waiver, but it shall be sufficient if such consent approves the substance thereof. After an amendment, supplement or waiver under this Section becomes effective, the Company shall mail to the Holders of Notes affected thereby a notice briefly describing the amendment, supplement or waiver. Any failure of the Company to mail such notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such amended or supplemental Indenture or waiver. Subject to Sections 6.04 and 6.07 hereof, the Holders of a majority in aggregate principal amount of the Notes then outstanding, voting as a single class, may waive compliance in a particular instance by the Company with any provision of this Indenture or the Notes. However, without the consent of each Holder affected, an amendment or waiver under this Section 9.02 may not (with respect to any Notes held by a non-consenting Holder): (1) reduce the principal amount of Notes whose Holders must consent to an amendment, supplement or waiver; 73

(2) reduce the principal of or change the fixed maturity of any Note or alter or waive any of the provisions with respect to the redemption of the Notes, except as provided above with respect to Sections 3.09, 4.10 and 4.15 hereof; (3) reduce the rate of or change the time for payment of interest, including default interest, on any Note; (4) waive a Default or Event of Default in the payment of principal of or premium, if any, or interest on the Notes (except a rescission of acceleration of the Notes by the Holders of at least a majority in aggregate principal amount of the then outstanding Notes and a waiver of the payment default that resulted from such acceleration); (5) make any Note payable in money other than that stated in the Notes; (6) make any change in the provisions of this Indenture relating to waivers of past Defaults or the rights of Holders of Notes to receive payments of principal of, or premium, if any, or interest on the Notes; (7) waive a redemption payment (but not any payment pursuant to Sections 3.09, 4.10 or 4.15 hereof) with respect to any Note; (8) except as provided under Article Eight hereof or in accordance with the terms of any Note Guarantee, release any Guarantor from any of its obligations under its Note Guarantee or make any change in a Note Guarantee that would adversely affect the Holders of the Notes; or (9) make any change in Section 6.04 or 6.07 hereof or in the foregoing amendment and waiver provisions. Section 9.03. Compliance with Trust Indenture Act. Every amendment or supplement to this Indenture or the Notes shall be set forth in a amended or supplemental Indenture that complies with the TIA as then in effect. Section 9.04. Revocation and Effect of Consents. Until an amendment, supplement or waiver becomes effective, a consent to it by a Holder of a Note is a continuing consent by the Holder of a Note and every subsequent Holder of a Note or portion of a Note that evidences the same debt as the consenting Holder's Note, even if notation of the consent is not made on any Note. However, any such Holder of a Note or subsequent Holder of a Note may revoke the consent as to its Note if the Trustee receives written notice of revocation before the date the waiver, supplement or amendment becomes effective. An amendment, supplement or waiver becomes effective in accordance with its terms and thereafter binds every Holder. Section 9.05. Notation on or Exchange of Notes. The Trustee may place an appropriate notation about an amendment, supplement or waiver on any Note thereafter authenticated. The Company in exchange for all Notes may issue and the Trustee shall, upon receipt of an Authentication Order, authenticate new Notes that reflect the amendment, supplement or waiver. 74

Failure to make the appropriate notation or issue a new Note shall not affect the validity and effect of such amendment, supplement or waiver. Section 9.06. Trustee to Sign Amendments, etc. The Trustee shall sign any amended or supplemental Indenture authorized pursuant to this Article Nine if the amendment or supplement does not adversely affect the rights, duties, liabilities or immunities of the Trustee. The Company may not sign an amendment or supplemental Indenture until the Board of Directors approves it. In executing any amended or supplemental indenture, the Trustee shall be entitled to receive and (subject to Section 7.01 hereof) shall be fully protected in relying upon, in addition to the documents required by Section 11.04 hereof, an Officer's Certificate and an Opinion of Counsel stating that the execution of such amended or supplemental indenture is authorized or permitted by this Indenture. ARTICLE 10 NOTE GUARANTEES Section 10.01. Guarantee. The provisions of this Article 10 shall apply only to those Subsidiaries of the Company, if any, that execute one or more supplemental indentures to this Indenture in the form of Exhibit E to this Indenture in compliance with the requirements of Section 4.18 of this Indenture. Subject to this Article 10, each of the Guarantors hereby, jointly and severally, unconditionally guarantees to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of this Indenture, the Notes or the obligations of the Company hereunder or thereunder, that: (a) the principal of and interest on the Notes will be promptly paid in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of the Company to the Holders or the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors shall be jointly and severally obligated to pay the same immediately. Each Guarantor agrees that this is a guarantee of payment and not a guarantee of collection. The Guarantors hereby agree that their obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or this Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. Each Guarantor hereby waives diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Company, any right to require a proceeding first against the Company, protest, notice and all demands whatsoever and covenant that this Note Guarantee shall not be discharged except by complete performance of the obligations contained in the Notes and this Indenture. 75

If any Holder or the Trustee is required by any court or otherwise to return to the Company, the Guarantors or any Custodian, trustee, liquidator or other similar official acting in relation to either the Company or the Guarantors, any amount paid by either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. Each Guarantor agrees that it shall not be entitled to any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. Each Guarantor further agrees that, as between the Guarantors, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as provided in Article 6 hereof for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any declaration of acceleration of such obligations as provided in Article 6 hereof, such obligations (whether or not due and payable) shall forthwith become due and payable by the Guarantors for the purpose of this Note Guarantee. The Guarantors shall have the right to seek contribution from any non-paying Guarantor so long as the exercise of such right does not impair the rights of the Holders under the Guarantee. Section 10.02. Limitation on Guarantor Liability. Each Guarantor, and by its acceptance of Notes, each Holder, hereby confirms that it is the intention of all such parties that the Note Guarantee of such Guarantor not constitute a fraudulent transfer or conveyance for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any Note Guarantee. To effectuate the foregoing intention, the Trustee, the Holders and the Guarantors hereby irrevocably agree that the obligations of such Guarantor will, after giving effect to such maximum amount and all other contingent and fixed liabilities of such Guarantor that are relevant under such laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other Guarantor under this Article 10, result in the obligations of such Guarantor under its Note Guarantee not constituting a fraudulent transfer or conveyance. Section 10.03. Execution and Delivery of Note Guarantee. To evidence its Note Guarantee set forth in Section 10.01, each Guarantor hereby agrees that a notation of such Note Guarantee substantially in the form included in Exhibit F shall be endorsed by an Officer of such Guarantor on each Note authenticated and delivered by the Trustee and that this Indenture shall be executed on behalf of such Guarantor by its President or one of its Vice Presidents. Each Guarantor hereby agrees that its Note Guarantee set forth in Section 10.01 shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. If an Officer whose signature is on this Indenture or on the Note Guarantee no longer holds that office at the time the Trustee authenticates the Note on which a Note Guarantee is endorsed, the Note Guarantee shall be valid nevertheless. The delivery of any Note by the Trustee, after the authentication thereof hereunder, shall constitute due delivery of the Note Guarantee set forth in this Indenture on behalf of the Guarantors. 76

In the event that the Company creates or acquires any new Subsidiaries subsequent to the date of this Indenture, if required by Section 4.18 hereof, the Company shall cause such Subsidiaries to execute supplemental indentures to this Indenture and Note Guarantees in accordance with Section 4.18 hereof and this Article 10, to the extent applicable. Section 10.04. Guarantors May Consolidate, etc., on Certain Terms. Except as otherwise provided in Section 10.05, no Guarantor may consolidate with or merge with or into (whether or not such Guarantor is the surviving Person) another Person whether or not affiliated with such Guarantor unless: (a) subject to Section 10.05 hereof, the Person formed by or surviving any such consolidation or merger (if other than a Guarantor or the Company) unconditionally assumes all the obligations of such Guarantor, pursuant to a supplemental indenture in form and substance reasonably satisfactory to the Trustee, under the Notes, the Indenture and the Note Guarantee on the terms set forth herein or therein; and (b) immediately after giving effect to such transaction, no Default or Event of Default exists. In case of any such consolidation, merger, sale or conveyance and upon the assumption by the successor Person, by supplemental indenture, executed and delivered to the Trustee and satisfactory in form to the Trustee, of the Note Guarantee endorsed upon the Notes and the due and punctual performance of all of the covenants and conditions of this Indenture to be performed by the Guarantor, such successor Person shall succeed to and be substituted for the Guarantor with the same effect as if it had been named herein as a Guarantor. Such successor Person thereupon may cause to be signed any or all of the Note Guarantees to be endorsed upon all of the Notes issuable hereunder which theretofore shall not have been signed by the Company and delivered to the Trustee. All the Note Guarantees so issued shall in all respects have the same legal rank and benefit under this Indenture as the Note Guarantees theretofore and thereafter issued in accordance with the terms of this Indenture as though all of such Note Guarantees had been issued at the date of the execution hereof. Except as set forth in Articles 4 and 5 hereof, and notwithstanding clauses (a) and (b) above, nothing contained in this Indenture or in any of the Notes shall prevent any consolidation or merger of a Guarantor with or into the Company or another Guarantor, or shall prevent any sale or conveyance of the property of a Guarantor as an entirety or substantially as an entirety to the Company or another Guarantor. Section 10.05. Releases Following Sale of Assets. In the event of a sale or other disposition of all of the assets of any Guarantor, by way of merger, consolidation or otherwise, or a sale or other disposition of all to the capital stock of any Guarantor, in each case to a Person that is not (either before or after giving effect to such transactions) a Subsidiary of the Company, then such Guarantor (in the event of a sale or other disposition, by way of merger, consolidation or otherwise, of all of the capital stock of such Guarantor) or the corporation acquiring the property (in the event of a sale or other disposition of all or substantially all of the assets of such Guarantor) will be released and relieved of any obligations under its Note Guarantee; provided that the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of this Indenture, including without limitation Section 4.10 hereof. Upon delivery by the Company to the 77

Trustee of an Officers' Certificate and an Opinion of Counsel to the effect that such sale or other disposition was made by the Company in accordance with the provisions of this Indenture, including without limitation Section 4.10 hereof, the Trustee shall execute any documents reasonably required in order to evidence the release of any Guarantor from its obligations under its Note Guarantee. Any Guarantor not released from its obligations under its Note Guarantee shall remain liable for the full amount of principal of and interest on the Notes and for the other obligations of any Guarantor under this Indenture as provided in this Article 10. ARTICLE 11 MISCELLANEOUS Section 11.01. Trust Indenture Act Controls. If any provision of this Indenture limits, qualifies or conflicts with the duties imposed by TIA (S).318(c), the imposed duties shall control. Section 11.02. Notices. Any notice or communication by the Company or the Trustee to the others is duly given if in writing and delivered in Person or mailed by first class mail (registered or certified, return receipt requested), telex, telecopier or overnight air courier guaranteeing next day delivery, to the others' address: If to the Company: Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 Telecopier No.: (713) 570-3150 Attention: Chief Financial Officer With a copy to: Cravath, Swaine & Moore 825 Eighth Avenue New York, New York 10019 Telecopier No.: (212) 474-3700 Attention: Stephen L. Burns, Esq. If to the Trustee: The Bank of New York 101 Barclay Street New York, New York 10286 Telecopier No.: (212) 815 5915 Attention: Corporate Trust Administration 78

The Company or the Trustee, by notice to the others, may designate additional or different addresses for subsequent notices or communications. All notices and communications (other than those sent to Holders) shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when answered back, if telexed; when receipt acknowledged, if telecopied; and the next Business Day after timely delivery to the courier, if sent by overnight air courier guaranteeing next day delivery. Any notice or communication to a Holder shall be mailed by first class mail, certified or registered, return receipt requested, or by overnight air courier guaranteeing next day delivery to its address shown on the register kept by the Registrar. Any notice or communication shall also be so mailed to any Person described in TIA (S). 313(c), to the extent required by the TIA. Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency with respect to other Holders. If a notice or communication is mailed in the manner provided above within the time prescribed, it is duly given, whether or not the addressee receives it. If the Company mails a notice or communication to Holders, it shall mail a copy to the Trustee and each Agent at the same time. Section 11.03. Communication by Holders of Notes with Other Holders of Notes. Holders may communicate pursuant to TIA (S). 312(b) with other Holders with respect to their rights under this Indenture or the Notes. The Company, the Trustee, the Registrar and anyone else shall have the protection of TIA (S). 312(c). Section 11.04. Certificate and Opinion as to Conditions Precedent. Upon any request or application by the Company to the Trustee to take any action under this Indenture, the Company shall furnish to the Trustee: (a) an Officers' Certificate in form and substance reasonably satisfactory to the Trustee (which shall include the statements set forth in Section 11.05 hereof) stating that, in the opinion of the signers, all conditions precedent and covenants, if any, provided for in this Indenture relating to the proposed action have been satisfied; and (b) an Opinion of Counsel in form and substance reasonably satisfactory to the Trustee (which shall include the statements set forth in Section 11.05 hereof) stating that, in the opinion of such counsel, all such conditions precedent and covenants have been satisfied. Section 11.05. Statements Required in Certificate or Opinion. 79

Each certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture (other than a certificate provided pursuant to TIA (S). 314(a)(4)) shall comply with the provisions of TIA (S). 314(e) and shall include: (a) a statement that the Person making such certificate or opinion has read such covenant or condition; (b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based; (c) a statement that, in the opinion of such Person, he or she has made such examination or investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been satisfied; and (d) a statement as to whether or not, in the opinion of such Person, such condition or covenant has been satisfied. Section 11.06. Rules by Trustee and Agents. The Trustee may make reasonable rules for action by or at a meeting of Holders. The Registrar or Paying Agent may make reasonable rules and set reasonable requirements for its functions; provided that no such rule shall conflict with the terms of this Indenture or the TIA. Section 11.07. No Personal Liability of Directors, Officers, Employees and Stockholders. No past, present or future director, officer, employee, incorporator or stockholder of the Company, as such, shall have any liability for any obligations of the Company under the Notes, this Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Section 11.08. Governing Law. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS INDENTURE AND THE NOTES WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. Section 11.09. No Adverse Interpretation of Other Agreements. This Indenture may not be used to interpret any other indenture, loan or debt agreement of the Company or its Subsidiaries or of any other Person. Any such indenture, loan or debt agreement may not be used to interpret this Indenture. Section 11.10. Successors. 80

All agreements of the Company in this Indenture and the Notes shall bind its successors. All agreements of the Trustee in this Indenture shall bind its successors. Section 11.11. Severability. In case any provision in this Indenture or in the Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. Section 11.12. Counterpart Originals. The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. Section 11.13. Table of Contents, Headings, etc. The Table of Contents, Cross-Reference Table and Headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not to be considered a part of this Indenture and shall in no way modify or restrict any of the terms or provisions hereof. [Signatures on following page] 81

SIGNATURES Dated as of May 16, 2001 Crown Castle International Corp. By: /s/ E. Blake Hawk ---------------------------- Name: E. Blake Hawk Title: Executive Vice President Attest: ______________________ Name: Title: The Bank of New York By: /s/ Van K. Brown ---------------------------- Name: Van K. Brown Title: Vice President Attest: ______________________ Authorized Signatory Date:

EXHIBIT A [Face of Note] - -------------------------------------------------------------------------------- 144A Note CUSIP: 228227AK0 144A Note ISIN: US228227AK00 Reg S Note CUSIP: U2159JAD2 Reg S Note ISIN: USU2159JAD29 IAI Note CUSIP: 228227AR5 IAI Note ISIN: US228227AR52 9 3/8% Senior Notes due 2011 No. ___ $____________ CROWN CASTLE INTERNATIONAL CORP. promises to pay to CEDE & CO. or registered assigns, the principal sum of ____________________________________________________DOLLARS on August 1, 2011. Interest Payment Dates: February 1 and August 1 Record Dates: January 15 and July 15 Dated: May 16, 2001 CROWN CASTLE INTERNATIONAL CORP. By: /S/ E. Blake Hawk ------------------------------- Name: E. Blake Hawk Title: Executive Vice President By: /s/ [SIGNATURE ILLEGIBLE] ------------------------------- Name: Title: This is one of the Notes referred to in the within-mentioned Indenture: The Bank of New York, as Trustee By: __________________________________ Authorized Signatory - --------------------------------------------------------------------------------

[Back of Note] 9 % Senior Notes due 2011 [Insert the Global Note Legend, if applicable, pursuant to the provisions of the Indenture] [Insert the Private Placement Legend, if applicable, pursuant to the provisions of the Indenture] Capitalized terms used herein shall have the meanings assigned to them in the Indenture referred to below unless otherwise indicated. 1. Interest. Crown Castle International Corp., a Delaware corporation (the "Company"), promises to pay interest on the principal amount of this Note at 9 3/8% per annum from May 16, 2001 until maturity. The Company will pay interest semi-annually in arrears on February 1 and August 1 of each year, or if any such day is not a Business Day, on the next succeeding Business Day (each an "Interest Payment Date"). Interest on the Notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of issuance; provided that if there is no existing Default in the payment of interest, and if this Note is authenticated between a record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date; provided, further, that the first Interest Payment Date shall be August 1, 2001. The Company shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium and Special Interest, if any, from time to time on demand at a rate that is 1% per annum in excess of the rate then in effect; it shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any applicable grace periods) from time to time on demand at the same rate to the extent lawful. Interest will be computed on the basis of a 360-day year of twelve 30-day months. 2. Method of Payment. The Company will pay interest on the Notes (except defaulted interest) to the Persons who are registered Holders of Notes at the close of business on the January 15 or July 15 next preceding the Interest Payment Date, even if such Notes are canceled after such record date and on or before such Interest Payment Date, except as provided in Section 2.12 of the Indenture with respect to defaulted interest. The Notes will be payable as to principal, premium, if any, and interest at the office or agency of the Company maintained for such purpose within or without the City and State of New York, or, at the option of the Company, payment of interest may be made by check mailed to the Holders at their addresses set forth in the register of Holders, and provided that payment by wire transfer of immediately available funds will be required with respect to principal of and interest, premium on, all Global Notes and all other Notes the Holders of which shall have provided wire transfer instructions to the Company or the Paying Agent. Such payment shall be in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts. 3. Paying Agent and Registrar. Initially, United States Trust Company of New York, the Trustee under the Indenture, will act as Paying Agent and Registrar. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company or any of its Subsidiaries may act in any such capacity. 4. Indenture. The Company issued the Notes under an Indenture dated as May 16, 2001 ("Indenture") between the Company and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S. Code (S)(S) 77aaa-77bbbb) (the "Trust Indenture Act"). The Notes are subject to all such terms, and Holders are referred to the Indenture and such Act for a statement of such terms. To the extent any provision of this Note conflicts with the express provisions of the Indenture, the provisions of the Indenture shall govern and be controlling. The Notes are obligations of the Company limited to $550,000,000 million in aggregate principal amount. A-2

5. Optional Redemption. (a) Except as provided in clause (b) of this Paragraph 5, the Notes will not be redeemable at the Company's option prior to August 1, 2006. On or after August 1, 2006, the Company may redeem all or a part of the Notes upon not less than 30 nor more than 60 days' notice, at the redemption prices (expressed as percentages of principal amount) set forth below plus accrued and unpaid interest, if any, on the Notes redeemed to the applicable redemption date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), if redeemed during the twelve-month period beginning on August 1 of the years indicated below: Year Percentage ---- ---------- 2006...................................... 104.688% 2007...................................... 103.125% 2008...................................... 101.563% 2009 and thereafter....................... 100.000% (b) Notwithstanding the provisions of clause (a) of this Paragraph 5, at any time during the period after the date of the original issuance of the Notes until August 1, 2004, the Company may on any one or more occasions redeem up to 35% of the aggregate principal amount of the Notes originally issued at a redemption price equal to 109.375% of the aggregate principal amount of the Notes to be redeemed on the redemption date with the net cash proceeds of one or more Public Equity Offerings and/or Strategic Equity Investments provided that: (1) at least 65% of the aggregate principal amount of the Notes originally issued remains outstanding immediately after the occurrence of such redemption (excluding Notes held by the Company or any of its Subsidiaries); and (2) the redemption occurs within 60 days of the date of the closing of such Public Equity Offering or Strategic Equity Investment. 6. Mandatory Redemption. Except as set forth in paragraph 7 below, the Company shall not be required to make mandatory redemption payments with respect to the Notes. 7. Repurchase at Option of Holder. (a) If there is a Change of Control, the Company shall be required to make an offer (a "Change of Control Offer") to repurchase all or any part (equal to $1,000 or an integral multiple thereof) of each Holder's Notes at a purchase price equal to 101% of the aggregate principal amount thereof plus accrued and unpaid interest thereon, if any, to the date of purchase (the "Change of Control Payment"). Within 30 days following any Change of Control, the Company shall mail a notice to each Holder setting forth the procedures governing the Change of Control Offer as required by the Indenture. (b) If the Company or a Restricted Subsidiary consummates any Asset Sales when the aggregate amount of Excess Proceeds exceeds $10 million, the Company shall commence an offer to all Holders of Notes (as "Asset Sale Offer") pursuant to Section 3.09 of the Indenture to purchase the maximum principal amount of Notes that may be purchased out of the Excess Proceeds at an offer price in cash in an amount equal to 100% of the principal amount thereof, plus accrued and unpaid interest thereon, if any, to the date fixed for the closing of such offer, in accordance with the procedures set forth in the Indenture. To the extent that the aggregate amount of Notes tendered pursuant to an Asset Sale A-3

Offer is less than the Excess Proceeds, the Company (or such Restricted Subsidiary) may use such deficiency for any purpose not otherwise prohibited by the Indenture. If the aggregate principal amount of Notes surrendered by Holders thereof exceeds the amount of Excess Proceeds, the Trustee shall select the Notes to be purchased on a pro rata basis. Holders of Notes that are the subject of an offer to purchase will receive an Asset Sale Offer from the Company prior to any related purchase date and may elect to have such Notes purchased by completing the form entitled "Option of Holder to Elect Purchase" on the reverse of the Notes. 8. Notice of Redemption. Notice of redemption will be mailed at least 30 days but not more than 60 days before the redemption date to each Holder whose Notes are to be redeemed at its registered address. Notes in denominations larger than $1,000 may be redeemed in part but only in whole multiples of $1,000, unless all of the Notes held by a Holder are to be redeemed. On and after the redemption date interest ceases to accrue on Notes or portions thereof called for redemption. 9. Denominations, Transfer, Exchange. The Notes are in registered form without coupons in denominations of $1,000 and integral multiples of $1,000. The transfer of Notes may be registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements and transfer documents and the Company may require a Holder to pay any taxes and fees required by law or permitted by the Indenture. The Company need not exchange or register the transfer of any Note or portion of a Note selected for redemption, except for the unredeemed portion of any Note being redeemed in part. Also, the Company need not exchange or register the transfer of any Notes for a period of 15 days before a selection of Notes to be redeemed or during the period between a record date and the corresponding Interest Payment Date. 10. Persons Deemed Owners. The registered Holder of a Note may be treated as its owner for all purposes. 11. Amendment, Supplement and Waiver. Subject to certain exceptions, the Indenture or the Notes may be amended or supplemented with the consent of the Holders of at least a majority in principal amount of the then outstanding Notes, and any existing default or compliance with any provision of the Indenture or the Notes may be waived with the consent of the Holders of a majority in principal amount of the then outstanding Notes. Without the consent of any Holder of Notes, the Indenture or the Notes may be amended or supplemented to cure any ambiguity, defect or inconsistency, to provide for uncertificated Notes in addition to or in place of certificated Notes, to provide for the assumption of the Company's obligations to Holders of the Notes in case of a merger or consolidation, to make any change that would provide any additional rights or benefits to the Holders of the Notes or that does not adversely affect the legal rights under the Indenture of any such Holder, or to comply with the requirements of the Securities and Exchange Commission in order to effect or maintain the qualification of the Indenture under the Trust Indenture Act. 12. Defaults and Remedies. Events of Default include: (i) default for 30 days in the payment when due of interest on the Notes; (ii) default in payment when due of principal of or premium, if any, on the Notes, (iii) failure by the Company or any of its Subsidiaries to comply with Section 3.09, 4.10, 4.15 or 5.01 of the Indenture; (iv) failure by the Company or any of its Subsidiaries for 30 days after notice to the Company by the Trustee or the Holders of at least 25% in principal amount of the Notes then outstanding to comply with certain other agreements in the Indenture or the Notes; (v) default under certain other agreements relating to Indebtedness of the Company which default (a) is caused by a failure to pay principal of or premium, if any, or interest on such Indebtedness prior to the expiration of the grace period provided in such Indebtedness on the date of such default or (b) results in the acceleration of such Indebtedness prior to its express maturity; (vi) certain final judgments for the payment of money that remain undischarged for a period of 60 days; and (vii) certain events of bankruptcy or insolvency with A-4

respect to the Company or any of its Restricted Subsidiaries. If any Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the then outstanding Notes may declare all the Notes to be due and payable. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or insolvency, all outstanding Notes will become due and payable without further action or notice. Holders may not enforce the Indenture or the Notes except as provided in the Indenture. Subject to certain limitations, Holders of a majority in principal amount of the then outstanding Notes may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Holders of the Notes notice of any continuing Default or Event of Default (except a Default or Event of Default relating to the payment of principal or interest) if it determines that withholding notice is in their interest. The Holders of a majority in aggregate principal amount of the Notes then outstanding by notice to the Trustee may on behalf of the Holders of all of the Notes waive any existing Default or Event of Default and its consequences under the Indenture except a continuing Default or Event of Default in the payment of interest on, or the principal of, the Notes. The Company is required to deliver to the Trustee annually a statement regarding compliance with the Indenture, and the Company is required upon becoming aware of any Default or Event of Default, to deliver to the Trustee a statement specifying such Default or Event of Default. 13. Trustee Dealings with Company. The Trustee, in its individual or any other capacity, may make loans to, accept deposits from, and perform services for the Company or its Affiliates, and may otherwise deal with the Company or its Affiliates, as if it were not the Trustee. 14. No Recourse Against Others. A director, officer, employee, incorporator or stockholder, of the Company, as such, shall not have any liability for any obligations of the Company under the Notes or the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Notes. 15. Authentication. This Note shall not be valid until authenticated by the manual signature of the Trustee or an authenticating agent. 16. Abbreviations. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act). 17. CUSIP Numbers. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Company has caused CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. The Company will furnish to any Holder upon written request and without charge a copy of the Indenture. Requests may be made to: Crown Castle International Corp., 510 Bering Drive, Suite 500, Houston, Texas 77057, Attention: Chief Financial Officer. A-5

Assignment Form To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to: ___________________________________ (Insert assignee's legal name) ________________________________________________________________________________ (Insert assignee's soc. sec. or tax I.D. no.) ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ (Print or type assignee's name, address and zip code) and irrevocably appoint ________________________________________________________ to transfer this Note on the books of the Company. The agent may substitute another to act for him. Date:__________________ Your Signature:_________________________ (Sign exactly as your name appears on the face of this Note) Signature Guarantee*:___________________ * Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). A-6

Option of Holder to Elect Purchase If you want to elect to have this Note purchased by the Company pursuant to Section 4.10 or 4.15 of the Indenture, check the appropriate box below: [_] Section 4.10 [_] Section 4.15 If you want to elect to have only part of the Note purchased by the Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the amount you elect to have purchased: $________________ Date:________________ Your Signature:_______________________ (Sign exactly as your name appears on the face of this Note) Tax Identification No.:_______________ Signature Guarantee*:____________________ * Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). A-7

SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE* The following exchanges of a part of this Global Note for an interest in another Global Note or for a Definitive Note, or exchanges of a part of another Global Note or Definitive Note for an interest in this Global Note, have been made: Signature of Principal Amount of authorized officer of Amount of decrease in Amount of increase in this Global Note Trustee or Principal Amount of Principal Amount of following such decrease Note Date of Exchange this Global Note this Global Note (or increase) Custodian ---------------- ---------------- ---------------- ------------- --------- * This schedule should be included only if the Note is issued in global form. - -------------------------------------------------------------------------------- A-8

EXHIBIT B FORM OF CERTIFICATE OF TRANSFER Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 [Registrar address block] Re: $ 450,000,000 9 % Senior Notes Due 2011 Reference is hereby made to the Indenture, dated as of May 16, 2001 (the "Indenture"), between Crown Castle International Corp., as issuer (the "Company"), and The Bank of New York, as trustee. Capitalized terms used but not defined herein shall have the meanings given to them in the Indenture. ___________________, (the "Transferor") owns and proposes to transfer the Note[s] or interest in such Note[s] specified in Annex A hereto, in the principal amount of $___________ in such Note[s] or interests (the "Transfer"), to ___________________________ (the "Transferee"), as further specified in Annex A hereto. In connection with the Transfer, the Transferor hereby certifies that: [CHECK ALL THAT APPLY] 1. [_] Check if Transferee will take delivery of a beneficial ------------------------------------------------------ interest in the 144A Global Note or a Definitive Note Pursuant to Rule 144A. The - --------------------------------------------------------------------------- Transfer is being effected pursuant to and in accordance with Rule 144A under the United States Securities Act of 1933, as amended (the "Securities Act"), and, accordingly, the Transferor hereby further certifies that the beneficial interest or Definitive Note is being transferred to a Person that the Transferor reasonably believed and believes is purchasing the beneficial interest or Definitive Note for its own account, or for one or more accounts with respect to which such Person exercises sole investment discretion, and such Person and each such account is a "qualified institutional buyer" within the meaning of Rule 144A in a transaction meeting the requirements of Rule 144A and such Transfer is in compliance with any applicable blue sky securities laws of any state of the United States. Upon consummation of the proposed Transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the 144A Global Note and/or the Definitive Note and in the Indenture and the Securities Act. 2. [_] Check if Transferee will take delivery of a beneficial ------------------------------------------------------ interest in the Regulation S Global Note or a Definitive Note pursuant to - ------------------------------------------------------------------------- Regulation S. The Transfer is being effected pursuant to and in accordance with - ------------ Rule 903 or Rule 904 under the Securities Act and, accordingly, the Transferor hereby further certifies that (i) the Transfer is not being made to a person in the United States and (x) at the time the buy order was originated, the Transferee was outside the United States or such Transferor and any Person acting on its behalf reasonably believed and believes that the Transferee was outside the United States or (y) the transaction was executed in, on or through the facilities of a designated offshore securities market and neither such Transferor nor any Person acting on its behalf knows that the transaction was prearranged with a buyer in the United States, (ii) no directed selling efforts have been made in contravention of the requirements of Rule 903(b) or Rule 904(b) of Regulation S under the Securities Act, (iii) the transaction is not part of a plan or scheme to evade the registration requirements of the Securities Act, and (iv) if the proposed transfer is being made prior to the B-1

expiration of the Restricted Period, the transfer is not being made to a U.S. Person or for the account or benefit of a U.S. Person (other than an Initial Purchaser). Upon consummation of the proposed transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will be subject to the restrictions on Transfer enumerated in the Private Placement Legend printed on the Regulation S Global Note, and/or the Definitive Note and in the Indenture and the Securities Act. 3. [_] Check and complete if Transferee will take delivery of ------------------------------------------------------ a beneficial interest in the IAI Global Note or a Definitive Note pursuant to - ------------------------------------------------------------------------------- any provision of the Securities Act other than Rule 144A or Regulation S. The - ------------------------------------------------------------------------ Transfer is being effected in compliance with the transfer restrictions applicable to beneficial interests in Restricted Global Notes and Restricted Definitive Notes and pursuant to and in accordance with the Securities Act and any applicable blue sky securities laws of any state of the United States, and accordingly the Transferor hereby further certifies that (check one): (a) [_] such Transfer is being effected pursuant to and in accordance with Rule 144 under the Securities Act; OR (b) [_] such Transfer is being effected to the Company or a subsidiary thereof; OR (c) [_] such Transfer is being effected pursuant to an effective registration statement under the Securities Act and in compliance with the prospectus delivery requirements of the Securities Act; OR (d) [_] such Transfer is being effected to an Institutional Accredited Investor and pursuant to an exemption from the registration requirements of the Securities Act other than Rule 144A, Rule 144 or Rule 904, and the Transferor hereby further certifies that it has not engaged in any general solicitation within the meaning of Regulation D under the Securities Act and the Transfer complies with the transfer restrictions applicable to beneficial interests in a Restricted Global Note or Restricted Definitive Notes and the requirements of the exemption claimed, which certification is supported by (1) a certificate executed by the Transferee in the form of Exhibit D to the Indenture and (2) an Opinion of Counsel provided by the Transferor or the Transferee (a copy of which the Transferor has attached to this certification), to the effect that such Transfer is in compliance with the Securities Act. Upon consummation of the proposed transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the IAI Global Note and/or the Definitive Notes and in the Indenture and the Securities Act. 4. [_] Check if Transferee will take delivery of a beneficial ------------------------------------------------------ interest in an Unrestricted Global Note or of an Unrestricted Definitive Note. - ----------------------------------------------------------------------------- (a) [_] Check if Transfer is pursuant to Rule 144. (i) The Transfer is being effected pursuant to and in accordance with Rule 144 under the Securities Act and in compliance with the transfer restrictions contained in the Indenture and any applicable blue sky securities laws of any state of the United States and (ii) the restrictions on transfer contained in the Indenture and the Private Placement B-2

Legend are not required in order to maintain compliance with the Securities Act. Upon consummation of the proposed Transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will no longer be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the Restricted Global Notes, on Restricted Definitive Notes and in the Indenture. (b) [_] Check if Transfer is Pursuant to Regulation S. (i) The Transfer is being effected pursuant to and in accordance with Rule 903 or Rule 904 under the Securities Act and in compliance with the transfer restrictions contained in the Indenture and any applicable blue sky securities laws of any state of the United States and (ii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act. Upon consummation of the proposed Transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will no longer be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the Restricted Global Notes, on Restricted Definitive Notes and in the Indenture. (c) [_] Check if Transfer is Pursuant to Other Exemption. (i) The Transfer is being effected pursuant to and in compliance with an exemption from the registration requirements of the Securities Act other than Rule 144, Rule 903 or Rule 904 and in compliance with the transfer restrictions contained in the Indenture and any applicable blue sky securities laws of any State of the United States and (ii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act. Upon consummation of the proposed Transfer in accordance with the terms of the Indenture, the transferred beneficial interest or Definitive Note will not be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the Restricted Global Notes or Restricted Definitive Notes and in the Indenture. This certificate and the statements contained herein are made for your benefit and the benefit of the Company. ___________________________________ [Insert Name of Transferor] By:________________________________ Name: Title: Dated: _______________________ B-3

ANNEX A TO CERTIFICATE OF TRANSFER 1. The Transferor owns and proposes to transfer the following: [CHECK ONE OF (A) OR (B)] (a) [_] a beneficial interest in the: (i) [_] 144A Global Note (CUSIP _________), or (ii) [_] Regulation S Global Note (CUSIP _________), or (iii) [_] IAI Global Note (CUSIP _________); or (b) [_] a Restricted Definitive Note. 2. After the Transfer the Transferee will hold: [CHECK ONE] (a) [_] a beneficial interest in the: (i) [_] 144A Global Note (CUSIP _________), or (ii) [_] Regulation S Global Note (CUSIP ________), or (iii) [_] IAI Global Note (CUSIP _________); or (iv) [_] Unrestricted Global Note (CUSIP _________); or (b) [_] a Restricted Definitive Note; or (c) [_] an Unrestricted Definitive Note, in accordance with the terms of the Indenture. B-4

EXHIBIT C FORM OF CERTIFICATE OF EXCHANGE Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 [Registrar address block] Re: $450,000,000 9 % Senior Notes due 2011 (CUSIP ____________) Reference is hereby made to the Indenture, dated as of May 16, 2001 (the "Indenture"), between Crown Castle International Corp., as issuer (the "Company"), and The Bank of New York, as trustee. Capitalized terms used but not defined herein shall have the meanings given to them in the Indenture. __________________________, (the "Owner") owns and proposes to exchange the Note[s] or interest in such Note[s] specified herein, in the principal amount of $____________ in such Note[s] or interests (the "Exchange"). In connection with the Exchange, the Owner hereby certifies that: 1. Exchange of Restricted Definitive Notes or Beneficial ----------------------------------------------------- Interests in a Restricted Global Note for Unrestricted Definitive Notes or - -------------------------------------------------------------------------- Beneficial Interests in an Unrestricted Global Note - --------------------------------------------------- (a) [_] Check if Exchange is from beneficial interest in a Restricted Global Note to beneficial interest in an Unrestricted Global Note. In connection with the Exchange of the Owner's beneficial interest in a Restricted Global Note for a beneficial interest in an Unrestricted Global Note in an equal principal amount, the Owner hereby certifies (i) the beneficial interest is being acquired for the Owner's own account without transfer, (ii) such Exchange has been effected in compliance with the transfer restrictions applicable to the Global Notes and pursuant to and in accordance with the United States Securities Act of 1933, as amended (the "Securities Act"), (iii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act and (iv) the beneficial interest in an Unrestricted Global Note is being acquired in compliance with any applicable blue sky securities laws of any state of the United States. (b) [_] Check if Exchange is from beneficial interest in a Restricted Global Note to Unrestricted Definitive Note. In connection with the Exchange of the Owner's beneficial interest in a Restricted Global Note for an Unrestricted Definitive Note, the Owner hereby certifies (i) the Definitive Note is being acquired for the Owner's own account without transfer, (ii) such Exchange has been effected in compliance with the transfer restrictions applicable to the Restricted Global Notes and pursuant to and in accordance with the Securities Act, (iii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act and (iv) the Definitive Note is being acquired in compliance with any applicable blue sky securities laws of any state of the United States. C-1

(c) [_] Check if Exchange is from Restricted Definitive Note to beneficial interest in an Unrestricted Global Note. In connection with the Owner's Exchange of a Restricted Definitive Note for a beneficial interest in an Unrestricted Global Note, the Owner hereby certifies (i) the beneficial interest is being acquired for the Owner's own account without transfer, (ii) such Exchange has been effected in compliance with the transfer restrictions applicable to Restricted Definitive Notes and pursuant to and in accordance with the Securities Act, (iii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act and (iv) the beneficial interest is being acquired in compliance with any applicable blue sky securities laws of any state of the United States. (d) [_] Check if Exchange is from Restricted Definitive Note to Unrestricted Definitive Note. In connection with the Owner's Exchange of a Restricted Definitive Note for an Unrestricted Definitive Note, the Owner hereby certifies (i) the Unrestricted Definitive Note is being acquired for the Owner's own account without transfer, (ii) such Exchange has been effected in compliance with the transfer restrictions applicable to Restricted Definitive Notes and pursuant to and in accordance with the Securities Act, (iii) the restrictions on transfer contained in the Indenture and the Private Placement Legend are not required in order to maintain compliance with the Securities Act and (iv) the Unrestricted Definitive Note is being acquired in compliance with any applicable blue sky securities laws of any state of the United States. 2. [_] Exchange of Restricted Definitive Notes or Beneficial ----------------------------------------------------- Interests in Restricted Global Notes for Restricted Definitive Notes or - ----------------------------------------------------------------------- Beneficial Interests in Restricted Global Notes - ----------------------------------------------- (a) [_] Check if Exchange is from beneficial interest in a Restricted Global Note to Restricted Definitive Note. In connection with the Exchange of the Owner's beneficial interest in a Restricted Global Note for a Restricted Definitive Note with an equal principal amount, the Owner hereby certifies that the Restricted Definitive Note is being acquired for the Owner's own account without transfer. Upon consummation of the proposed Exchange in accordance with the terms of the Indenture, the Restricted Definitive Note issued will continue to be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the Restricted Definitive Note and in the Indenture and the Securities Act. (b) [_] Check if Exchange is from Restricted Definitive Note to beneficial interest in a Restricted Global Note. In connection with the Exchange of the Owner's Restricted Definitive Note for a beneficial interest in the [CHECK ONE] 144A Global Note, Regulation S Global Note, IAI Global Note with an equal principal amount, the Owner hereby certifies (i) the beneficial interest is being acquired for the Owner's own account without transfer and (ii) such Exchange has been effected in compliance with the transfer restrictions applicable to the Restricted Global Notes and pursuant to and in accordance with the Securities Act, and in compliance with any applicable blue sky securities laws of any state of the United States. Upon consummation of the proposed Exchange in accordance with the terms of the Indenture, the beneficial interest issued will be subject to the restrictions on transfer enumerated in the Private Placement Legend printed on the relevant Restricted Global Note and in the Indenture and the Securities Act. This certificate and the statements contained herein are made for your benefit and the benefit of the Company. C-2

_________________________________ [Insert Name of Transferor] By: ----------------------------- Name: Title: Dated: ______________________ C-3

EXHIBIT D FORM OF CERTIFICATE FROM ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 [Registrar address block] Re: $450,000,00 9 % Senior Notes due 2011 Reference is hereby made to the Indenture, dated as of May 16, 2001 (the "Indenture"), between Crown Castle International Corp., as issuer (the "Company"), and The Bank of New York, as trustee. Capitalized terms used but not defined herein shall have the meanings given to them in the Indenture. In connection with our proposed purchase of $____________ aggregate principal amount of: (a) [_] a beneficial interest in a Global Note, or (b) [_] a Definitive Note, we confirm that: 1. We understand that any subsequent transfer of the Notes or any interest therein is subject to certain restrictions and conditions set forth in the Indenture and the undersigned agrees to be bound by, and not to resell, pledge or otherwise transfer the Notes or any interest therein except in compliance with, such restrictions and conditions and the United States Securities Act of 1933, as amended (the "Securities Act"). 2. We understand that the offer and sale of the Notes have not been registered under the Securities Act, and that the Notes and any interest therein may not be offered or sold except as permitted in the following sentence. We agree, on our own behalf and on behalf of any accounts for which we are acting as hereinafter stated, that if we should sell the Notes or any interest therein, we will do so only (A) to the Company or any subsidiary thereof, (B) in accordance with Rule 144A under the Securities Act to a "qualified institutional buyer" (as defined therein), (C) to an institutional "accredited investor" (as defined below) that, prior to such transfer, furnishes (or has furnished on its behalf by a U.S. broker-dealer) to you and to the Company a signed letter substantially in the form of this letter and an Opinion of Counsel in form reasonably acceptable to the Company to the effect that such transfer is in compliance with the Securities Act, (D) outside the United States in accordance with Rule 904 of Regulation S under the Securities Act, (E) pursuant to the provisions of Rule 144(k) under the Securities Act or (F) pursuant to an effective registration statement under the Securities Act, and we further agree to provide to any person purchasing the Definitive Note or beneficial interest in a Global Note from us in a transaction meeting the requirements of clauses (A) through (E) of this paragraph a notice advising such purchaser that resales thereof are restricted as stated herein. D-1

3. We understand that, on any proposed resale of the Notes or beneficial interest therein, we will be required to furnish to you and the Company such certifications, legal opinions and other information as you and the Company may reasonably require to confirm that the proposed sale complies with the foregoing restrictions. We further understand that the Notes purchased by us will bear a legend to the foregoing effect. 4. We are an institutional "accredited investor" (as defined in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and have such knowledge and experience in financial and business matters as to be capable of evaluating the merits and risks of our investment in the Notes, and we and any accounts for which we are acting are each able to bear the economic risk of our or its investment. 5. We are acquiring the Notes or beneficial interest therein purchased by us for our own account or for one or more accounts (each of which is an institutional "accredited investor") as to each of which we exercise sole investment discretion. You and the Company are entitled to rely upon this letter and are irrevocably authorized to produce this letter or a copy hereof to any interested party in any administrative or legal proceedings or official inquiry with respect to the matters covered hereby. _____________________________________ [Insert Name of Accredited Investor] By:__________________________________ Name: Title: Dated: _______________________ D-2

EXHIBIT E FORM OF SUPPLEMENTAL INDENTURE TO BE DELIVERED BY SUBSEQUENT GUARANTORS Supplemental Indenture (this "Supplemental Indenture"), dated as of ________, among __________________ (the "Guaranteeing Subsidiary"), a subsidiary of CROWN CASTLE INTERNATIONAL CORP. (or its permitted successor), a Delaware corporation (the "Company"), the Company, the other Guarantors (as defined in the Indenture referred to herein) and THE BANK OF NEW YORK, as trustee under the Indenture referred to below (the "Trustee"). W I T N E S S E T H WHEREAS, the Company has heretofore executed and delivered to the Trustee an indenture (the "Indenture"), dated as of May 16, 2001 providing for the issuance of an aggregate principal amount of up to $550.0 million of 9 % Senior Notes due 2011 (the "Notes"); WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Company's Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the "Note Guarantee"); and WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture. NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture. 2. Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees as follows: (a) Along with all Guarantors named in the Indenture, to jointly and severally Guarantee to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of the Indenture, the Notes or the obligations of the Company hereunder or thereunder, that: (i) the principal of and interest on the Notes will be promptly paid in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of and interest on the Notes, if any, if lawful, and all other obligations of the Company to the Holders or the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and (ii) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that same will be promptly paid in full when due or performed in accordance with the terms of the extension or E-1

renewal, whether at stated maturity, by acceleration or otherwise. Failing payment when due of any amount so guaranteed or any performance so guaranteed for whatever reason, the Guarantors shall be jointly and severally obligated to pay the same immediately. (b) The obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of the Notes or the Indenture, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a guarantor. (c) The following is hereby waived: diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Company, any right to require a proceeding first against the Company, protest, notice and all demands whatsoever. (d) This Note Guarantee shall not be discharged except by complete performance of the obligations contained in the Notes and the Indenture. (e) If any Holder or the Trustee is required by any court or otherwise to return to the Company, the Guarantors, or any Custodian, Trustee, liquidator or other similar official acting in relation to either the Company or the Guarantors, any amount paid by either to the Trustee or such Holder, this Note Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect. (f) The Guaranteeing Subsidiary shall not be entitled to any right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations guaranteed hereby. (g) As between the Guarantors, on the one hand, and the Holders and the Trustee, on the other hand, (x) the maturity of the obligations guaranteed hereby may be accelerated as provided in Article 6 of the Indenture for the purposes of this Note Guarantee, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (y) in the event of any declaration of acceleration of such obligations as provided in Article 6 of the Indenture, such obligations (whether or not due and payable) shall forthwith become due and payable by the Guarantors for the purpose of this Note Guarantee. (h) The Guarantors shall have the right to seek contribution from any non-paying Guarantor so long as the exercise of such right does not impair the rights of the Holders under the Guarantee. (i) Pursuant to Section 10.02 of the Indenture, after giving effect to any maximum amount and any other contingent and fixed liabilities that are relevant under any applicable Bankruptcy or fraudulent conveyance laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of any other Guarantor in respect of the obligations of such other E-2

Guarantor under Article 10 of the Indenture shall result in the obligations of such Guarantor under its Note Guarantee not constituting a fraudulent transfer or conveyance. 3. Execution and Delivery. Each Guaranteeing Subsidiary agrees that the Note Guarantees shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee. 4. Guaranteeing Subsidiary May Consolidate, Etc. on Certain Terms. (a) The Guaranteeing Subsidiary may not consolidate with or merge with or into (whether or not such Guarantor is the surviving Person) another corporation, Person or entity whether or not affiliated with such Guarantor unless: (i) subject to Section 10.05 of the Indenture, the Person formed by or surviving any such consolidation or merger (if other than a Guarantor or the Company) unconditionally assumes all the obligations of such Guarantor, pursuant to a supplemental indenture in form and substance reasonably satisfactory to the Trustee, under the Notes, the Indenture and the Note Guarantee on the terms set forth herein or therein; and (ii) immediately after giving effect to such transaction, no Default or Event of Default exists. (b) In case of any such consolidation, merger, sale or conveyance and upon the assumption by the successor corporation, by supplemental indenture, executed and delivered to the Trustee and satisfactory in form to the Trustee, of the Note Guarantee endorsed upon the Notes and the due and punctual performance of all of the covenants and conditions of the Indenture to be performed by the Guarantor, such successor corporation shall succeed to and be substituted for the Guarantor with the same effect as if it had been named herein as a Guarantor. Such successor corporation thereupon may cause to be signed any or all of the Note Guarantees to be endorsed upon all of the Notes issuable hereunder which theretofore shall not have been signed by the Company and delivered to the Trustee. All the Note Guarantees so issued shall in all respects have the same legal rank and benefit under the Indenture as the Note Guarantees theretofore and thereafter issued in accordance with the terms of the Indenture as though all of such Note Guarantees had been issued at the date of the execution hereof. (c) Except as set forth in Articles 4 and 5 of the Indenture, and notwithstanding clauses (a) and (b) above, nothing contained in the Indenture or in any of the Notes shall prevent any consolidation or merger of a Guarantor with or into the Company or another Guarantor, or shall prevent any sale or conveyance of the property of a Guarantor as an entirety or substantially as an entirety to the Company or another Guarantor. 5. Releases. (a) In the event of a sale or other disposition of all of the assets of any Guarantor, by way of merger, consolidation or otherwise, or a sale or other disposition of all to the capital stock of any Guarantor, then such Guarantor (in the event of a sale or other disposition, by way of merger, consolidation or otherwise, of all of the capital stock of such Guarantor) or the corporation acquiring the property (in the event of a sale or E-3

other disposition of all or substantially all of the assets of such Guarantor) will be released and relieved of any obligations under its Note Guarantee; provided that the Net Proceeds of such sale or other disposition are applied in accordance with the applicable provisions of the Indenture, including without limitation Section 4.10 of the Indenture. Upon delivery by the Company to the Trustee of an Officers' Certificate and an Opinion of Counsel to the effect that such sale or other disposition was made by the Company in accordance with the provisions of the Indenture, including without limitation Section 4.10 of the Indenture, the Trustee shall execute any documents reasonably required in order to evidence the release of any Guarantor from its obligations under its Note Guarantee. (b) Any Guarantor not released from its obligations under its Note Guarantee shall remain liable for the full amount of principal of and interest on the Notes and for the other obligations of any Guarantor under the Indenture as provided in Article 10 of the Indenture. 6. No Recourse Against Others. No past, present or future director, officer, employee, incorporator, stockholder or agent of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Company or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the Commission that such a waiver is against public policy. 7. New York Law to Govern. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 8. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 9. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof. 10. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Company. IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and attested, all as of the date first above written. Dated:______________ E-4

[Guaranteeing Subsidiary] By: ------------------------------ Name: Title: Crown Castle International Corp. By: /s/ [SIGNATURE ILLEGIBLE] ------------------------------ Name: Title: [Other Guarantors] By: -------------------------------- Name: Title The Bank of New York as Trustee By: ------------------------------ Name: Title: E-5

FORM OF NOTATION OF GUARANTEE For value received, each Guarantor (which term includes any successor Person under the Indenture) has, jointly and severally, unconditionally guaranteed, to the extent set forth in the Indenture and subject to the provisions in the Indenture dated as of May 16, 2001 (the "Indenture") among CROWN CASTLE INTERNATIONAL CORP. and THE BANK OF NEW YORK, as trustee (the "Trustee"), (a) the due and punctual payment of the principal of, premium, if any, and interest on the Notes (as defined in the Indenture), whether at maturity, by acceleration, redemption or otherwise, the due and punctual payment of interest on overdue principal and premium, and, to the extent permitted by law, interest, and the due and punctual performance of all other obligations of the Company to the Holders or the Trustee all in accordance with the terms of the Indenture and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal, whether at stated maturity, by acceleration or otherwise. The obligations of the Guarantors to the Holders of Notes and to the Trustee pursuant to the Note Guarantee and the Indenture are expressly set forth in Article 10 of the Indenture and reference is hereby made to the Indenture for the precise terms of the Note Guarantee. Each Holder of a Note, by accepting the same, agrees to and shall be bound by such provisions. [Name of Guarantor(s)] By: ------------------ Name: Title: F-1

Exhibit 4.17 Crown Castle International Corp. 9 3/8% Senior Notes due 2011 --------- Exchange and Registration Rights Agreement ------------------------------------------ May 16, 2001 J.P. Morgan Securities Inc., Goldman, Sachs & Co., Credit Suisse First Boston Corporation, Lehman Brothers Inc., Morgan Stanley & Co. Incorporated, BNY Capital Markets, Inc., Scotia Capital (USA) Inc., The Royal Bank of Scotland plc, As representatives of the several Purchasers named in Schedule I to the Purchase Agreement c/o J.P. Morgan Securities Inc. 270 Park Avenue New York, New York 10017 Ladies and Gentlemen: Crown Castle International Corp., a Delaware corporation (the "Company"), proposes to issue and sell to the Purchasers (as defined herein) upon the terms set forth in the Purchase Agreement (as defined herein) its 9 3/8% Senior Notes due 2011. As an inducement to the Purchasers to enter into the Purchase Agreement and in satisfaction of a condition to the obligations of the Purchasers thereunder, the Company agrees with the Purchasers for the benefit of holders (as defined herein) from time to time of the Registrable Securities (as defined herein) as follows: 1 Certain Definitions. For purposes of this Agreement, the following terms shall have the following respective meanings: "Base Interest" shall mean the interest that would otherwise accrue on the Securities under the terms thereof and the Indenture, without giving effect to the provisions of this Agreement. The term "broker-dealer" shall mean any broker or dealer registered with the Commission under the Exchange Act. 1

"Business Day" shall mean any day except Saturday, Sunday or other day in the City of New York on which banks are authorized or ordered to close. "Closing Date" shall mean the date on which the Securities are initially issued. "Commission" shall mean the United States Securities and Exchange Commission, or any other federal agency at the time administering the Exchange Act or the Securities Act, whichever is the relevant statute for the particular purpose. "Effective Time," in the case of (i) an Exchange Registration, shall mean the time and date as of which the Commission declares the Exchange Registration Statement effective or as of which the Exchange Registration Statement otherwise becomes effective and (ii) a Shelf Registration, shall mean the time and date as of which the Commission declares the Shelf Registration Statement effective or as of which the Shelf Registration Statement otherwise becomes effective. "Electing Holder" shall mean any holder of Registrable Securities that has returned a completed and signed Notice and Questionnaire to the Company in accordance with Section 3(d)(ii) or 3(d)(iii) hereof. "Exchange Act" shall mean the Securities Exchange Act of 1934, or any successor thereto, as the same shall be amended from time to time. "Exchange Offer" shall have the meaning assigned thereto in Section 2(a) hereof. "Exchange Registration" shall have the meaning assigned thereto in Section 3(c) hereof. "Exchange Registration Statement" shall have the meaning assigned thereto in Section 2(a) hereof. "Exchange Securities" shall have the meaning assigned thereto in Section 2(a) hereof. The term "holder" shall mean each of the Purchasers and other persons who acquire Registrable Securities from time to time (including any successors or assigns), in each case for so long as such person owns any Registrable Securities. "Indenture" shall mean the Indenture, dated as of May 16, 2001, between the Company and The Bank of New York, as Trustee, as the same shall be amended from time to time. "Majority Holders" means the holders of a majority of the aggregate principal amount at maturity of the Registrable Securities satisfying the terms and conditions for 2

registration under the Exchange Registration Statement or the Shelf Registration Statement. "Notice and Questionnaire" means a Notice of Registration Statement and Selling Securityholder Questionnaire substantially in the form of Exhibit A hereto. The term "person" shall mean a corporation (profit or nonprofit), association, limited liability company, partnership, organization, business, individual, government or political subdivision thereof or governmental agency. "Purchase Agreement" shall mean the Purchase Agreement, dated as of May 10, 2001, between the Purchasers and the Company relating to the Securities. "Purchasers" shall mean the Purchasers named in Schedule I to the Purchase Agreement. "Registrable Securities" shall mean the Securities; provided, however, that a Security shall cease to be a Registrable Security when (i) in the circumstances contemplated by Section 2(a) hereof, the Security has been exchanged for an Exchange Security in an Exchange Offer as contemplated in Section 2(a) hereof (provided that any Exchange Security that, pursuant to the last two sentences of Section 2(a), is included in a prospectus for use in connection with resales by broker-dealers shall be deemed to be a Registrable Security with respect to Sections 5, 6 and 9 until resale of such Registrable Security has been effected within the 180-day period referred to in Section 2(a)); (ii) in the circumstances contemplated by Section 2(b) hereof, a Shelf Registration Statement registering such Security under the Securities Act has been declared or becomes effective and such Security has been sold or otherwise transferred by the holder thereof in accordance with the Shelf Registration Statement; (iii) such Security is distributed to the public pursuant to Rule 144 under circumstances in which any legend borne by such Security relating to restrictions on transferability thereof, under the Securities Act, is removed by the Company or pursuant to the Indenture; (iv) such Security is eligible to be sold pursuant to Rule 144(k); or (v) such Security shall cease to be outstanding. "Registration Default" shall have the meaning assigned thereto in Section 2(c) hereof. "Registration Expenses" shall have the meaning assigned thereto in Section 4 hereof. "Resale Period" shall have the meaning assigned thereto in Section 2(a) hereof. "Restricted Holder" shall mean (i) a holder that is an affiliate of the Company within the meaning of Rule 405, (ii) a holder who acquires Exchange Securities outside the ordinary course of such holder's business, (iii) a holder who has arrangements or understandings with any person to participate in the Exchange Offer for the purpose of 3

distributing Exchange Securities and (iv) a holder that is a broker- dealer, but only with respect to Exchange Securities received by such broker-dealer pursuant to an Exchange Offer in exchange for Registrable Securities acquired by the broker-dealer directly from the Company. "Rule 144," "Rule 158," "Rule 405" and "Rule 415" shall mean, in each case, such rule promulgated under the Securities Act (or any successor provision), as the same shall be amended from time to time. "Securities" shall mean the 9% Senior Notes due 2011 of the Company to be issued and sold to the Purchasers, and securities issued in exchange therefor or in lieu thereof pursuant to the Indenture. "Securities Act" shall mean the Securities Act of 1933, or any successor thereto, as the same shall be amended from time to time. "Shelf Registration" shall have the meaning assigned thereto in Section 2(b) hereof. "Shelf Registration Statement" shall have the meaning assigned thereto in Section 2(b) hereof. "Special Interest" shall have the meaning assigned thereto in Section 2(c) hereof. "Trust Indenture Act" shall mean the Trust Indenture Act of 1939, or any successor thereto, and the rules, regulations and forms promulgated thereunder, all as the same shall be amended from time to time. Unless the context otherwise requires, any reference herein to a "Section" or "clause" refers to a Section or clause, as the case may be, of this Agreement, and the words "herein," "hereof" and "hereunder" and other words of similar import refer to this Agreement as a whole and not to any particular Section or other subdivision. 2 Registration Under the Securities Act. (a) Except as set forth in Section 2(b) below, the Company agrees to file under the Securities Act as soon as practicable, but in no event later than 60 days following the Closing Date, a registration statement relating to an offer to exchange (such registration statement, the "Exchange Registration Statement", and such offer, the "Exchange Offer") any and all of the Securities for a like aggregate principal amount of debt securities issued by the Company, which debt securities are substantially identical to the Securities (and are entitled to the benefits of trust indenture which are substantially identical to the Indenture or is the Indenture and which has been qualified under the Trust Indenture Act), except that they have been registered pursuant to an effective registration statement under the Securities Act and do not contain provisions for the additional 4

interest contemplated in Section 2(c) below (such new debt securities hereinafter called "Exchange Securities"). The Company agrees to use all commercially reasonable efforts to cause the Exchange Registration Statement to become effective under the Securities Act at the earliest possible time, but in no event later than 180 days following the Closing Date. The Exchange Offer will be registered under the Securities Act on the appropriate form and will comply with all applicable tender offer rules and regulations under the Exchange Act. The Company further agrees to use its best efforts to commence and complete the Exchange Offer on the earliest practicable date, but no later than 30 Business Days after such registration statement has become effective, hold the Exchange Offer open for at least 20 Business Days and exchange Exchange Securities for all Registrable Securities that have been properly tendered and not withdrawn on or prior to the expiration of the Exchange Offer. The Exchange Offer will be deemed to have been "completed" only if the debt securities received by holders other than Restricted Holders in the Exchange Offer for Registrable Securities are, upon receipt, transferable by each such holder without restriction under the Securities Act and the Exchange Act and without material restrictions under the blue sky or securities laws of a substantial majority of the States of the United States of America. The Exchange Offer shall be deemed to have been completed upon the earlier to occur of (i) the Company having exchanged the Exchange Securities for all outstanding Registrable Securities pursuant to the Exchange Offer and (ii) the Company having exchanged, pursuant to the Exchange Offer, Exchange Securities for all Registrable Securities that have been properly tendered and not withdrawn before the expiration of the Exchange Offer, which shall be on a date that is at least 20 days following the commencement of the Exchange Offer. The Company agrees (x) to include in the Exchange Registration Statement a prospectus for use in any resales by any holder of Exchange Securities that is a broker-dealer and (y) to keep such Exchange Registration Statement effective for a period (the "Resale Period") beginning when Exchange Securities are first issued in the Exchange Offer and ending upon the earlier of the expiration of the 180th day after the Exchange Offer has been completed or such time as such broker-dealers no longer own any Registrable Securities. With respect to such Exchange Registration Statement, such holders shall have the benefit of the rights of indemnification and contribution set forth in Sections 6(a), (c), (d) and (e) hereof. (b) If (i) on or prior to the time the Exchange Offer is completed existing Commission interpretations are changed such that the debt securities received by holders other than Restricted Holders in the Exchange Offer for Registrable Securities are not or would not be, upon receipt, transferable by each such holder without restriction under the Securities Act, (ii) the Exchange Offer has not been completed within 225 days following the Closing Date or (iii) the Exchange Offer is not available to any holder of the Securities, the Company shall, in lieu of (or, in the case of clause (iii), in addition to) conducting the Exchange Offer contemplated by Section 2(a), file under the Securities Act on or prior to 45 days after such filing obligation arises, a "shelf" registration statement providing for the registration of, and the sale on a continuous or delayed basis by the holders of, all of the Registrable Securities, pursuant to Rule 415 or any similar rule that may be adopted by the Commission (such filing, the "Shelf Registration" and 5

such registration statement, the "Shelf Registration Statement"). The Company agrees to use all commercially reasonable efforts (x) to cause the Shelf Registration Statement to become or be declared effective on or prior to 90 days following the filing of such Shelf Registration Statement and to keep such Shelf Registration Statement continuously effective for a period ending on the earlier of the second anniversary of the Effective Time or such time as there are no longer any Registrable Securities outstanding, provided, however, that no holder shall be entitled to be named as a selling securityholder in the Shelf Registration Statement or to use the prospectus forming a part thereof for resales of Registrable Securities unless such holder is an Electing Holder, and (y) after the Effective Time of the Shelf Registration Statement, upon the request of any holder of Registrable Securities that is not then an Electing Holder, to take any action reasonably necessary to enable such holder to use the prospectus forming a part thereof for resales of Registrable Securities, including, without limitation, any action necessary to identify such holder as a selling securityholder in the Shelf Registration Statement, provided, however, that nothing in this clause (y) shall relieve any such holder of the obligation to return a completed and signed Notice and Questionnaire to the Company in accordance with Section 3(d)(iii) hereof. The Company further agrees to supplement or make amendments to the Shelf Registration Statement, as and when required by the rules, regulations or instructions applicable to the registration form used by the Company for such Shelf Registration Statement or by the Securities Act or rules and regulations thereunder for shelf registration and the Company agrees to furnish to each Electing Holder copies of any such supplement or amendment prior to its being used or promptly following its filing with the Commission. (c) In the event that (i) the Company has not filed the Exchange Registration Statement or Shelf Registration Statement on or before the date on which such registration statement is required to be filed pursuant to Section 2(a) or 2(b), respectively, or (ii) such Exchange Registration Statement or Shelf Registration Statement has not become effective or been declared effective by the Commission on or before the date on which such registration statement is required to become or be declared effective pursuant to Section 2(a) or 2(b), respectively, or (iii) the Exchange Offer has not been completed within 30 Business Days following the initial effective date of the Exchange Registration Statement relating to the Exchange Offer (if the Exchange Offer is then required to be made) or (iv) any Exchange Registration Statement or Shelf Registration Statement required by Section 2(a) or 2(b) hereof is filed and declared effective but shall thereafter either be withdrawn by the Company or shall become subject to an effective stop order issued pursuant to Section 8(d) of the Securities Act suspending the effectiveness of such registration statement (except as specifically permitted herein) without being succeeded immediately by an additional registration statement filed and declared effective (each such event referred to in clauses (i) through (iv), a "Registration Default" and each period during which a Registration Default has occurred and is continuing, a "Registration Default Period"), then, as liquidated damages for such Registration Default, subject to the provisions of Section 9(b), special interest ("Special Interest"), in addition to the Base Interest, shall accrue in an amount equal to $0.05 per week per 6

$1,000 in principal amount at maturity of Registrable Securities for each week or portion thereof that the Registration Default Period continues for the first 90-day period immediately following the occurrence of such Registration Default. The amount of the liquidated damages shall increase by an additional $0.05 per week per $1,000 in principal amount at maturity of Registrable Securities with respect to each subsequent 90-day period until all Registration Defaults have been cured, up to a maximum amount of liquidated damages for all Registration Defaults of $.50 per week per $1,000 in principal amount at maturity of Registrable Securities. (d) The Company shall take all actions necessary or advisable to be taken by it to ensure that the transactions contemplated herein are effected as so contemplated. (e) Any reference herein to a registration statement as of any time shall be deemed to include any document incorporated, or deemed to be incorporated, therein by reference as of such time and any reference herein to any post-effective amendment to a registration statement as of any time shall be deemed to include any document incorporated, or deemed to be incorporated, therein by reference as of such time. 3 Registration Procedures. If the Company files a registration statement pursuant to Section 2(a) or Section 2(b), the following provisions shall apply: (a) At or before the Effective Time of the Exchange Registration Statement or the Shelf Registration Statement, as the case may be, the Company shall qualify the Indenture under the Trust Indenture Act of 1939. (b) In the event that such qualification would require the appointment of a new trustee under the Indenture, the Company shall appoint a new trustee thereunder pursuant to the applicable provisions of the Indenture. (c) In connection with the Company's obligations with respect to the registration of Exchange Securities as contemplated by Section 2(a) (the "Exchange Registration"), if applicable, the Company shall: (i) prepare and file with the Commission, in no event later than 60 days following the Closing Date, an Exchange Registration Statement on any form which may be utilized by the Company and which shall permit the Exchange Offer and resales of Exchange Securities by broker-dealers during the Resale Period to be effected as contemplated by Section 2(a), and use all commercially reasonable efforts to cause such Exchange Registration Statement to become effective in no event later than 180 days following the Closing Date; (ii) promptly file with the Commission such amendments and supplements to such Exchange Registration Statement and the prospectus 7

included therein as may be necessary to effect and maintain the effectiveness of such Exchange Registration Statement for the periods and purposes contemplated in Section 2(a) hereof and as may be required by the applicable rules and regulations of the Commission and the instructions applicable to the form of such Exchange Registration Statement, and promptly provide each broker-dealer holding Exchange Securities with such number of copies of the prospectus included therein (as then amended or supplemented), in conformity in all material respects with the requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder, as such broker-dealer reasonably may request prior to the expiration of the Resale Period, for use in connection with resales of Exchange Securities; (iii) promptly notify each broker-dealer that has requested or received copies of the prospectus included in such registration statement, and confirm such advice in writing, (A) when such Exchange Registration Statement or the prospectus included therein or any prospectus amendment or supplement or post-effective amendment has been filed, and, with respect to such Exchange Registration Statement or any post-effective amendment, when the same has become effective, (B) of any comments by the Commission and by the blue sky or securities commissioner or regulator of any state with respect thereto or any request by the Commission for amendments or supplements to such Exchange Registration Statement or prospectus or for additional information, (C) of the issuance by the Commission of any stop order suspending the effectiveness of such Exchange Registration Statement or the initiation or threatening of any proceedings for that purpose, (D) if at any time the representations and warranties of the Company contemplated by Section 5 cease to be true and correct in all material respects, (E) of the receipt by the Company of any notification with respect to the suspension of the qualification of the Exchange Securities for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose, or (F) at any time during the Resale Period when a prospectus is required to be delivered under the Securities Act, that such Exchange Registration Statement, prospectus, prospectus amendment or supplement or post-effective amendment does not conform in all material respects to the applicable requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder or contains an untrue statement of a material fact or omits to state any material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing; (iv) in the event that the Company would be required, pursuant to Section 3(e)(iii)(F) above, to notify any broker- dealers holding Exchange Securities, without delay prepare and furnish to each such holder a reasonable number of copies of a prospectus supplemented or amended so that, as thereafter delivered to purchasers of such Exchange Securities during the Resale Period, 8

such prospectus shall conform in all material respects to the applicable requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder and shall not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing; (v) use its best efforts to obtain the withdrawal of any order suspending the effectiveness of such Exchange Registration Statement or any post-effective amendment thereto at the earliest practicable date; (vi) use its best efforts to (A) register or qualify the Exchange Securities under the securities laws or blue sky laws of such jurisdictions as are contemplated by Section 2(a) no later than the commencement of the Exchange Offer, (B) keep such registrations or qualifications in effect and comply with such laws so as to permit the continuance of offers, sales and dealings therein in such jurisdictions until the expiration of the Resale Period and (C) take any and all other actions as may be reasonably necessary or advisable to enable each broker-dealer holding Exchange Securities to consummate the disposition thereof in such jurisdictions; provided, however, that the Company shall not be required for any such purpose to (1) qualify as a foreign corporation in any jurisdiction wherein it would not otherwise be required to qualify but for the requirements of this Section 3(c)(vi), (2) consent to general service of process in any such jurisdiction or (3) make any changes to its certificate of incorporation or by-laws or any agreement between it and its stockholders; (vii) use its best efforts to obtain the consent or approval of each governmental agency or authority, whether federal, state or local, which may be required to effect the Exchange Registration, the Exchange Offer and the offering and sale of Exchange Securities by broker-dealers during the Resale Period; (viii) provide a CUSIP number for all Exchange Securities, not later than the applicable Effective Time; (ix) comply with all applicable rules and regulations of the Commission and shall make generally available to its securityholders within eighteen months after the effective date of such Exchange Registration Statement, an earning statement (which need not be audited) of the Company and its subsidiaries complying with Section 11(a) of the Securities Act (including, at the option of the Company, Rule 158 thereunder). (d) In connection with the Company's obligations with respect to the Shelf Registration, if applicable, the Company shall: 9

(i) prepare and file with the Commission as soon as practicable but in any case within the time periods specified in Section 2(b), a Shelf Registration Statement on any form which may be utilized by the Company and which shall register all of the Registrable Securities for resale by the holders thereof in accordance with such method or methods of disposition as may be specified by such of the holders as, from time to time, may be Electing Holders and use its best efforts to cause such Shelf Registration Statement to become effective within the time periods specified in Section 2(b); (ii) not less than 25 calendar days prior to the Effective Time of the Shelf Registration Statement, mail the Notice and Questionnaire to the holders of Registrable Securities; no holder shall be entitled to be named as a selling securityholder in the Shelf Registration Statement as of the Effective Time, and no holder shall be entitled to use the prospectus forming a part thereof for resales of Registrable Securities at any time, unless such holder has returned a completed and signed Notice and Questionnaire to the Company by the deadline for response set forth therein; provided, however, holders of Registrable Securities shall have at least 20 calendar days from the date on which the Notice and Questionnaire is first mailed to such holders to return a fully completed and signed Notice and Questionnaire to the Company; (iii) after the Effective Time of the Shelf Registration Statement, upon the request of any holder of Registrable Securities that is not then an Electing Holder, promptly send a Notice and Questionnaire to such holder; provided that the Company shall not be required to take any action to name such holder as a selling securityholder in the Shelf Registration Statement or to enable such holder to use the prospectus forming a part thereof for resales of Registrable Securities until such holder has returned a completed and signed Notice and Questionnaire to the Company; (iv) promptly prepare and file with the Commission such amendments and supplements to such Shelf Registration Statement and the prospectus included therein as may be necessary to effect and maintain the effectiveness of such Shelf Registration Statement for the period specified in Section 2(b) hereof and as may be required by the applicable rules and regulations of the Commission and the instructions applicable to the form of such Shelf Registration Statement, and furnish to the Electing Holders copies of any such supplement or amendment promptly following its filing with the Commission; (v) comply with the provisions of the Securities Act with respect to the disposition of all of the Registrable Securities covered by such Shelf Registration Statement in accordance with the intended methods of disposition by the Electing Holders provided for in such Shelf Registration Statement; 10

(vi) provide (A) the Electing Holders, (B) the underwriters (which term, for purposes of this Agreement, shall include a person deemed to be an underwriter within the meaning of Section 2(a)(11) of the Securities Act), if any, thereof, (C) any sales or placement agent therefor, (D) counsel for any such underwriter or agent and (E) not more than one counsel for all the Electing Holders the opportunity to participate in the preparation of such Shelf Registration Statement, each prospectus included therein or filed with the Commission and each amendment or supplement thereto; (vii) for a reasonable period prior to the filing of such Shelf Registration Statement, and throughout the period specified in Section 2(b), make available at reasonable times at the Company's principal place of business or such other reasonable place for inspection by the persons referred to in Section 3(d)(vi) who shall certify to the Company that they have a current intention to sell the Registrable Securities pursuant to the Shelf Registration such financial and other information and books and records of the Company, and cause the officers and employees, counsel and independent certified public accountants of the Company to respond to such inquiries as shall be reasonably necessary, in the judgment of the respective counsel referred to in such Section, to conduct a reasonable investigation within the meaning of Section 11 of the Securities Act; provided, however, that each such party shall be required to maintain in confidence and not to disclose to any other person any information or records reasonably designated by the Company as being confidential, until such time as (A) such information becomes a matter of public record (whether by virtue of its inclusion in such registration statement of otherwise) through a third party without an accompanying obligation of confidentiality, or (B) such person shall be required so to disclose such information pursuant to a subpoena or order of any court or other governmental agency or body having jurisdiction over the matter (subject to the requirements of such order, and only after such person shall have given the Company prompt prior written notice of such requirement), or (C) such information is required to be set forth in such Shelf Registration Statement or the prospectus included therein or in an amendment to such Shelf Registration Statement or an amendment or supplement to such prospectus in order that such Shelf Registration Statement, prospectus, amendment or supplement, as the case may be, complies with applicable requirements of the federal securities laws and the rules and regulations of the Commission and does not contain an untrue statement of a material fact or omit to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing; (viii) promptly notify each of the Electing Holders, any sales or placement agent therefor and any underwriter thereof (which notification may be made through any managing underwriter that is a representative of such underwriter for such purpose) and confirm such advice in writing, (A) when such 11

Shelf Registration Statement or the prospectus included therein or any prospectus amendment or supplement or post-effective amendment has been filed, and, with respect to such Shelf Registration Statement or any post-effective amendment, when the same has become effective, (B) of any comments by the Commissioner and by the blue sky or securities commissioner or regulator of any state with respect thereto or any request by the Commission for amendments or supplements to such Shelf Registration Statement or prospectus or for additional information, (C) of the issuance by the Commission of any stop order suspending the effectiveness of such Shelf Registration Statement or the initiation or threatening of any proceedings for that purpose, (D) if at any time the representations and warranties of the Company contemplated by Section 3(d)(xvii) or Section 5 cease to be true and correct in all material respects, (E) of the receipt by the Company of any notification with respect to the suspension of the qualification of the Registrable Securities for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose, or (F) if at any time when a prospectus is required to be delivered under the Securities Act, that such Shelf Registration Statement, prospectus, prospectus amendment or supplement or post-effective amendment does not conform in all material respects to the applicable requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder or contains an untrue statement of a material fact or omits to state any material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing; (ix) use its best efforts to obtain the withdrawal of any order suspending the effectiveness of such registration statement or any post-effective amendment thereto at the earliest practicable date; (x) if requested by any managing underwriter or underwriters, any placement or sales agent or any Electing Holder, promptly incorporate in a prospectus supplement or post- effective amendment such information as is required by the applicable rules and regulations of the Commission and as such managing underwriter or underwriters, such agent or such Electing Holder specifies should be included therein relating to the terms of the sale of such Registrable Securities, including information with respect to the principal amount of Registrable Securities being sold by such Electing Holder or agent or to any underwriters, the name and description of such Electing Holder, agent or underwriter, the offering price of such Registrable Securities and any discount, commission or other compensation payable in respect thereof, the purchase price being paid therefor by such underwriters and with respect to any other terms of the offering of the Registrable Securities to be sold by such Electing Holder or agent or to such underwriters; and make all required filings of such prospectus supplement or post-effective amendment promptly after notification of the matters to be incorporated in such prospectus supplement or post-effective amendment; 12

(xi) furnish to each Electing Holder, each placement or sales agent, if any, therefor, each underwriter, if any, thereof and the respective counsel referred to in Section 3(d)(vi) an executed copy (or, in the case of an Electing Holder, a conformed copy) of such Shelf Registration Statement, each such amendment and supplement thereto (in each case including all exhibits thereto (in the case of an Electing Holder of Registrable Securities, upon request) and documents incorporated by reference therein) and such number of copies of such Shelf Registration Statement (excluding exhibits thereto and documents incorporated by reference therein unless specifically so requested by such Electing Holder, agent or underwriter, as the case may be) and of the prospectus included in such Shelf Registration Statement (including each preliminary prospectus and any summary prospectus), in conformity in all material respects with the applicable requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder, and such other documents, as such Electing Holder, agent, if any, and underwriter, if any, may reasonably request in order to facilitate the offering and disposition of the Registrable Securities owned by such Electing Holder, offered or sold by such agent or underwritten by such underwriter and to permit such Electing Holder, agent and underwriter to satisfy the prospectus delivery requirements of the Securities Act; and the Company hereby consents to the use of such prospectus (including such preliminary and summary prospectus) and any amendment or supplement thereto by each such Electing Holder and by any such agent and underwriter, in each case in the form most recently provided to such person by the Company, in connection with the offering and sale of the Registrable Securities covered by the prospectus (including such preliminary and summary prospectus) or any supplement or amendment thereto; (xii) use its best efforts to (A) register or qualify the Registrable Securities to be included in such Shelf Registration Statement under such securities laws or blue sky laws of such jurisdictions as any Electing Holder and each placement or sales agent, if any, therefor and underwriter, if any, thereof shall reasonably request, (B) keep such registrations or qualifications in effect and comply with such laws so as to permit the continuance of offers, sales and dealings therein in such jurisdictions during the period the Shelf Registration is required to remain effective under Section 2(b) above and for so long as may be necessary to enable any such Electing Holder, agent or underwriter to complete its distribution of Securities pursuant to such Shelf Registration Statement and (C) take any and all other actions as may be reasonably necessary or advisable to enable each such Electing Holder, agent, if any, and underwriter, if any, to consummate the disposition in such jurisdictions of such Registrable Securities; provided, however, that the Company shall not be required for any such purpose to (1) qualify as a foreign corporation in any jurisdiction wherein it would not otherwise be required to qualify but for the requirements of this Section 3(d)(xii), (2) consent to general service of process in any such jurisdiction or (3) make any 13

changes to its certificate of incorporation or by-laws or any agreement between it and its stockholders; (xiii) use its best efforts to obtain the consent or approval of each governmental agency or authority, whether federal, state or local, which may be required to effect the Shelf Registration or the offering or sale in connection therewith or to enable the selling holder or holders to offer, or to consummate the disposition of, their Registrable Securities; (xiv) Unless any Registrable Securities shall be in book- entry only form, cooperate with the Electing Holders and the managing underwriters, if any, to facilitate the timely preparation and delivery of certificates representing Registrable Securities to be sold, and which certificates shall not bear any restrictive legends; and, in the case of an underwritten offering, enable such Registrable Securities to be in such denominations and registered in such names as the managing underwriters may request at least two business days prior to any sale of the Registrable Securities; (xv) provide a CUSIP number for all Registrable Securities, not later than the applicable Effective Time; (xvi) enter into one or more underwriting agreements, engagement letters, agency agreements, "best efforts" underwriting agreements or similar agreements, as appropriate, including customary provisions relating to indemnification and contribution, and take such other actions in connection therewith as the Majority Holders shall request in order to expedite or facilitate the disposition of such Registrable Securities; (xvii) whether or not an agreement of the type referred to in Section 3(d)(xvi) hereof is entered into and whether or not any portion of the offering contemplated by the Shelf Registration is an underwritten offering or is made through a placement or sales agent or any other entity, (A) make such representations and warranties to the Electing Holders and the placement or sales agent, if any, therefor and the underwriters, if any, thereof in form, substance and scope as are customarily made in connection with an offering of debt securities pursuant to any appropriate agreement or to a registration statement filed on the form applicable to the Shelf Registration; (B) obtain an opinion of counsel to the Company in customary form and covering such matters, of the type customarily covered by such an opinion, as the Majority Holders may reasonably request, addressed to such Electing Holder or Electing Holders and the placement or sales agent, if any, therefor and the underwriters, if any, thereof and dated the effective date of such Shelf Registration Statement (and if such Shelf Registration Statement contemplates an underwritten offering of a part or all of the Registrable Securities, dated the date of the closing under the underwriting agreement relating thereto) it being agreed that the matters to be covered by such opinion shall 14

include in form, substance and scope those matters set forth in Section 7(b) of the Purchase Agreement; (C) obtain a "cold comfort" letter or letters from the independent certified public accountants of the Company addressed to the selling Electing Holders, the placement or sales agent, if any, therefor or the underwriters, if any, thereof, dated (i) the effective date of such Shelf Registration Statement and (ii) the effective date of any prospectus supplement to the prospectus included in such Shelf Registration Statement or post-effective amendment to such Shelf Registration Statement which includes unaudited or audited financial statements as of a date or for a period subsequent to that of the latest such statements included in such prospectus (and, if such Shelf Registration Statement contemplates an underwritten offering pursuant to any prospectus supplement to the prospectus included in such Shelf Registration Statement or post-effective amendment to such Shelf Registration Statement which includes unaudited or audited financial statements as of a date or for a period subsequent to that of the latest such statements included in such prospectus, dated the date of the closing under the underwriting agreement relating thereto), such letter or letters to be in customary form and covering such matters of the type customarily covered by letters of such type; (D) deliver such documents and certificates, including officers' certificates, as may be reasonably requested by the Majority Holders to evidence the accuracy of the representations and warranties made pursuant to clause (A) above or those contained in Section 5(a) hereof and the compliance with or satisfaction of any agreements or conditions contained in the underwriting agreement or other agreement entered into by the Company; and (E) undertake such obligations relating to expense reimbursement, indemnification and contribution as are provided in Section 6 hereof; (xviii) notify in writing each holder of Registrable Securities of any proposal by the Company to amend or waive any provision of this Agreement pursuant to Section 9(h) hereof and of any amendment or waiver effected pursuant thereto, each of which notices shall contain the text of the amendment or waiver proposed or effected, as the case may be; (xix) in the event that any broker-dealer registered under the Exchange Act shall underwrite any Registrable Securities or participate as a member of an underwriting syndicate or selling group or "assist in the distribution" (within the meaning of the Conduct Rules (the "Conduct Rules") of the National Association of Securities Dealers, Inc. ("NASD") or any successor thereto, as amended from time to time) thereof, whether as a holder of such Registrable Securities or as an underwriter, a placement or sales agent or a broker or dealer in respect thereof, or otherwise, assist such broker-dealer in complying with the requirements of such Conduct Rules, including by (A) if such Conduct Rules shall so require, engaging a "qualified independent underwriter" (as defined in such Conduct Rules) to participate in the preparation of the Shelf Registration Statement relating to such Registrable Securities, to exercise usual standards of due diligence in respect 15

thereto and, if any portion of the offering contemplated by such Shelf Registration Statement is an underwritten offering or is made through a placement or sales agent, to recommend the yield of such Registrable Securities, (B) indemnifying any such qualified independent underwriter to the extent of the indemnification of underwriters provided in Section 6 hereof, and (C) providing such information to such broker-dealer as may be required in order for such broker-dealer to comply with the requirements of the Conduct Rules; (xx) comply with all applicable rules and regulations of the Commission, and shall make generally available to its securityholders within eighteen months after the effective date of such Shelf Registration Statement, an earning statement (which need not be audited) of the Company and its subsidiaries complying with Section 11(a) of the Securities Act (including, at the option of the Company, Rule 158 thereunder); and (xxi) if the Securities have been rated prior to the initial sale of the Securities, use its best efforts to confirm that such ratings will apply to the Registrable Securities covered by a Shelf Registration Statement, or (B) if the Securities were not previously rated, use commercially reasonable efforts to cause the Registrable Securities covered by the Shelf Registration Statement to be rated with the appropriate rating agencies, if so requested by the Majority Holders. (e) In the event that the Company would be required, pursuant to Section 3(d)(viii)(F) above, to notify the Electing Holders, the placement or sales agent, if any, therefor and the managing underwriters, if any, thereof, the Company shall without delay prepare and furnish to each of the Electing Holders, to each placement or sales agent, if any, and to each such underwriter, if any, a reasonable number of copies of a prospectus supplemented or amended so that, as thereafter delivered to purchasers of Registrable Securities, such prospectus shall conform in all material respects to the applicable requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder and shall not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing. Each Electing Holder agrees that upon receipt of any notice from the Company pursuant to Section 3(d)(viii)(F) hereof, such Electing Holder shall forthwith discontinue the disposition of Registrable Securities pursuant to the Shelf Registration Statement applicable to such Registrable Securities until such Electing Holder shall have received copies of such amended or supplemented prospectus, and if so directed by the Company, such Electing Holder shall deliver to the Company (at the Company's expense) all copies, then in such Electing Holder's possession of the prospectus covering such Registrable Securities at the time of receipt of such notice. (f) In the event of a Shelf Registration, in addition to the information required to be provided by each Electing Holder in its Notice and Questionnaire, the Company 16

may require such Electing Holder to furnish to the Company such additional information regarding such Electing Holder and such Electing Holder's intended method of distribution of Registrable Securities as may be required in order to comply with the Securities Act. Each such Electing Holder agrees to notify the Company as promptly as practicable of any inaccuracy or change in information previously furnished by such Electing Holder to the Company or of the occurrence of any event in either case as a result of which any prospectus relating to such Shelf Registration contains or would contain an untrue statement of a material fact regarding such Electing Holder or such Electing Holder's intended method of disposition of such Registrable Securities or omits to state any material fact regarding such Electing Holder or such Electing Holder's intended method of disposition of such Registrable Securities required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing, and promptly to furnish to the Company any additional information required to correct and update any previously furnished information or required so that such prospectus shall not contain, with respect to such Electing Holder or the disposition of such Registrable Securities, an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading in light of the circumstances then existing. (g) Until the expiration of two years after the Closing Date, the Company will not, and will not permit any of its "affiliates" (as defined in Rule 144) to, resell any of the Securities that have been reacquired by any of them except pursuant to an effective registration statement under the Securities Act. 4 Registration Expenses. The Company agrees to bear and to pay or cause to be paid promptly all expenses incident to the Company's performance of or compliance with this Agreement, including (a) all Commission and any NASD registration, filing and review fees and expenses including fees and disbursements of counsel for the Majority Holders in connection with such registration, filing and review, (b) all fees and expenses in connection with the qualification of the Securities for offering and sale under the State securities and blue sky laws referred to in Section 3(d)(xii) hereof and determination of their eligibility for investment under the laws of such jurisdictions as the Majority Holders may designate, including any fees and disbursements of the above designated counsel referred to in subclause (a) above in connection with such qualification and determination, (c) all expenses relating to the preparation, printing, production, distribution and reproduction of each registration statement required to be filed hereunder, each prospectus included therein or prepared for distribution pursuant hereto, each amendment or supplement to the foregoing, the expenses of preparing the Securities for delivery and the expenses of printing or producing any underwriting agreements, agreements among underwriters, selling agreements and blue sky or legal investment memoranda and all other documents in connection with the offering, sale or delivery of Securities to be disposed of (including certificates representing the Securities), (d) messenger, telephone and delivery expenses relating to the offering, sale or delivery of Securities and the preparation of documents referred to in clause (c) above, (e) fees 17

and expenses of the Trustee under the Indenture, any agent of the Trustee and the counsel for the Trustee and of any collateral agent or custodian, (f) internal expenses (including all salaries and expenses of the Company's officers and employees performing legal or accounting duties), (g) fees, disbursements and expenses of counsel and independent certified public accountants of the Company (including the expenses of any opinions or "cold comfort" letters required by or incident to such performance and compliance), (h) fees, disbursements and expenses of any "qualified independent underwriter" engaged pursuant to Section 3(d)(xix) hereof, (i) fees, disbursements and expenses of one counsel for the Electing Holders retained in connection with a Shelf Registration, as selected by the Majority Holders (which counsel shall be reasonably satisfactory to the Company), (j) any fees charged by securities rating services for rating the Securities, and (k) fees, expenses and disbursements of any other persons, including special experts, retained by the Company in connection with such registration (collectively, the "Registration Expenses"). To the extent that any Registration Expenses are incurred, assumed or paid by any holder of Registrable Securities or any placement or sales agent therefor or underwriter thereof, the Company shall reimburse such person for the full amount of the Registration Expenses so incurred, assumed or paid promptly after receipt of a request therefor. Notwithstanding the foregoing, the holders of the Registrable Securities being registered shall pay all agency fees and commissions and underwriting discounts and commissions attributable to the sale of such Registrable Securities and the fees and disbursements of any counsel or other advisors or experts retained by such holders (severally or jointly), other than the counsel and experts specifically referred to above. 5 Representations and Warranties. The Company represents and warrants to, and agrees with, each Purchaser and each of the holders from time to time of Registrable Securities that: (a) Each registration statement covering Registrable Securities and each prospectus (including any preliminary or summary prospectus) contained therein or furnished pursuant to Section 3(d) or Section 3(c) hereof and any further amendments or supplements to any such registration statement or prospectus, when it becomes effective or is filed with the Commission, as the case may be, and, in the case of an underwritten offering of Registrable Securities, at the time of the closing under the underwriting agreement relating thereto, will conform in all material respects to the requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; and at all times subsequent to the Effective Time when a prospectus would be required to be delivered under the Securities Act, other than from (i) such time as a notice has been given to holders of Registrable Securities pursuant to Section 3(d)(viii)(F) or Section 3(c)(iii)(F) hereof until (ii) such time as the Company furnishes an amended or supplemented prospectus pursuant to Section 3(e) or Section 3(c)(iv) hereof, each such registration statement, and each prospectus (including any summary prospectus) contained therein or furnished pursuant to Section 3(d) or Section 18

3(c) hereof, as then amended or supplemented, will conform in all material respects to the requirements of the Securities Act and the Trust Indenture Act and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading in the light of the circumstances then existing; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by a holder of Registrable Securities expressly for use therein. (b) Any documents incorporated by reference in any prospectus referred to in Section 5(a) hereof, when they become or became effective or are or were filed with the Commission, as the case may be, will conform or conformed in all material respects to the requirements of the Securities Act or the Exchange Act, as applicable, and none of such documents will contain or contained an untrue statement of a material fact or will omit or omitted to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by a holder of Registrable Securities expressly for use therein. (c) The compliance by the Company with all of the provisions of this Agreement and the consummation of the transactions herein contemplated will not conflict with or result in a breach of any of the terms or provisions of, or constitute a default under, any Indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any subsidiary of the Company is a party or by which the Company or any subsidiary of the Company is bound or to which any of the property or assets of the Company or any subsidiary of the Company is subject, nor will such action result in any violation of the provisions of the certificate of incorporation, as amended, or the by-laws of the Company or any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any subsidiary of the Company or any of their properties; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the consummation by the Company of the transactions contemplated by this Agreement, except the registration under the Securities Act of the Securities, qualification of the Indenture under the Trust Indenture Act and such consents, approvals, authorizations, registrations or qualifications as may be required under State securities or blue sky laws in connection with the offering and distribution of the Securities. (d) This Agreement has been duly authorized, executed and delivered by the Company. 19

6 Indemnification. (a) Indemnification by the Company. The Company will indemnify and hold harmless each of the holders of Registrable Securities included in an Exchange Registration Statement, each of the Electing Holders of Registrable Securities included in a Shelf Registration Statement and each person who participates as a placement or sales agent or as an underwriter in any offering or sale of such Registrable Securities against any losses, claims, damages or liabilities, joint or several, to which such holder, agent or underwriter may become subject under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in any Exchange Registration Statement or Shelf Registration Statement, as the case may be, under which such Registrable Securities were registered under the Securities Act, or any preliminary, final or summary prospectus contained therein or furnished by the Company to any such holder, Electing Holder or underwriter, or any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse such holder, such Electing Holder, such agent and such underwriter for any legal or other expenses reasonably incurred by them in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable to any such person in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in such registration statement, or preliminary, final or summary prospectus, or amendment or supplement thereto, in reliance upon and in conformity with written information furnished to the Company by such person expressly for use therein. (b) Indemnification by the Holders and any Agents and Underwriters. The Electing Holders of such Registrable Securities included in any registration statement filed pursuant to Section 2(b) and 2(a) hereof and each person who participates as an underwriter in any offering of such Registrable Securities, severally and not jointly, agrees to (i) indemnify and hold harmless the Company and all other holders of Registrable Securities, against any losses, claims, damages or liabilities to which the Company or such other holders of Registrable Securities may become subject, under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in such registration statement, or any preliminary, final or summary prospectus contained therein or furnished by the Company to any such Electing Holder, agent or underwriter, or any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by 20

such Electing Holder, agent or underwriter, or any amendment or supplement thereto, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by such Electing Holder, or underwriter expressly for use therein, and (ii) reimburse the Company for any legal or other expenses reasonably incurred by the Company in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that no such Electing Holder or underwriter shall be required to undertake liability to any person under this Section 6(b) for any amounts in excess of the dollar amount of the proceeds to be received by such Electing Holder from the sale of such Electing Holder's Registrable Securities pursuant to such registration. (c) Notices of Claims, Etc. Promptly after receipt by an indemnified party under Section 6 (a) or (b) hereof of written notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against an indemnifying party pursuant to the indemnification provisions of or contemplated by this Section 6, notify such indemnifying party in writing of the commencement of such action; but the failure to so notify the indemnifying party will not relieve the indemnifying party from liability under Section 6 (a) or (b) hereof unless and to the extent it did not otherwise learn of such action and such failure results in the forfeiture by the indemnifying party of substantial rights and defenses. In case any such action shall be brought against any indemnified party and it shall notify an indemnifying party of the commencement thereof, such indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, such indemnifying party shall not be liable to such indemnified party for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party. (d) Contribution. If for any reason the indemnification provisions contemplated by Section 6(a) or Section 6(b) hereof are unavailable to or insufficient to hold harmless an indemnified party in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable to such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party in connection with the statements or omissions which resulted in such losses, 21

claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative fault of such indemnifying party and indemnified party shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact relates to information supplied by such indemnifying party or by such indemnified party, and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The parties hereto agree that it would not be just and equitable if contributions pursuant to this Section 6(d) were determined by pro rata allocation (even if the holders or any agents or underwriters or all of them were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to in this Section 6(d). The amount paid or payable by an indemnified party as a result of the losses, claims, damages, or liabilities (or actions in respect thereof) referred to above shall be deemed to include any legal or other fees or expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 6(d), no holder shall be required to contribute any amount in excess of the amount by which the dollar amount of the proceeds received by such holder from the sale of any Registrable Securities (after deducting any fees, discounts and commissions applicable thereto) exceeds the amount of any damages which such holder has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission, and no underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Registrable Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The holders' and any underwriters' obligations in this Section 6(d) to contribute shall be several in proportion to the principal amount of Registrable Securities registered or underwritten, as the case may be, by them and not joint. (e) The obligations of the Company under this Section 6 shall be in addition to any liability which the Company may otherwise have and shall extend, upon the same terms and conditions, to each officer, director and partner of each holder, agent and underwriter and each person, if any, who controls any holder, agent or underwriter within the meaning of the Securities Act; and the obligations of the holders and any agents or underwriters contemplated by this Section 6 shall be in addition to any liability which the respective holder, agent or underwriter may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company and to each person, if any, who controls the Company within the meaning of the Securities Act. 22

7 Underwritten Offerings. (a) Selection of Underwriters. If any of the Registrable Securities covered by the Shelf Registration are to be sold pursuant to an underwritten offering, the managing underwriter or underwriters thereof shall be designated by the Majority Holders of the Registrable Securities to be included in such offering, provided that such designated managing underwriter or underwriters is or are reasonably acceptable to the Company. (b) Participation by Holders. Each holder of Registrable Securities hereby agrees with each other such holder that no such holder may participate in any underwritten offering hereunder unless such holder (i) agrees to sell such holder's Registrable Securities on the basis provided in any underwriting arrangements approved by the persons entitled hereunder to approve such arrangements and (ii) completes and executes all questionnaires, powers of attorney, indemnities, underwriting agreements and other documents reasonably required under the terms of such underwriting arrangements. 8 Rule 144. The Company covenants to the holders of Registrable Securities that to the extent it shall be required to do so under the Exchange Act, the Company shall timely file the reports required to be filed by it under the Exchange Act or the Securities Act (including the reports under Sections 13 and 15(d) of the Exchange Act referred to in subparagraph (c)(1) of Rule 144 adopted by the Commission under the Securities Act) and the rules and regulations adopted by the Commission thereunder, and shall take such further action as any holder of Registrable Securities may reasonably request, all to the extent required from time to time to enable such holder to sell Registrable Securities without registration under the Securities Act within the limitations of the exemption provided by Rule 144 under the Securities Act, as such Rule may be amended from time to time, or any similar or successor rule or regulation hereafter adopted by the Commission. Upon the request of any holder of Registrable Securities in connection with that holder's sale pursuant to Rule 144, the Company shall deliver to such holder a written statement as to whether it has complied with such requirements. 9 Miscellaneous. (a) No Inconsistent Agreements. The Company represents, warrants, covenants and agrees that it has not granted, and shall not grant, registration rights with respect to Registrable Securities or any other securities which would be inconsistent with the terms contained in this Agreement. (b) Specific Performance. The parties hereto acknowledge that there would be no adequate remedy at law if the Company fails to perform any of its obligations hereunder and that the Purchasers and the holders from time to time of the Registrable Securities may be irreparably harmed by any such failure, and accordingly agree that the Purchasers and such holders, in addition to any other remedy to which they may be entitled at law or in equity, shall be entitled to compel specific performance of the 23

obligations of the Company under this Agreement in accordance with the terms and conditions of this Agreement, in any court of the United States or any State thereof having jurisdiction. (c) Notices. All notices, requests, claims, demands, waivers and other communications hereunder shall be in writing and shall be deemed to have been duly given when received as follows: if to (i) the Company, to it at 510 Bering Drive, Suite 500, Houston, Texas 77057; (ii) a holder, to it at the address of such holder set forth in the security register or other records of the Company; or (iii) to such other address as the Company or any such holder may have furnished to the other in writing in accordance herewith; provided, that notices of change of address shall be effective only upon receipt. (d) Parties in Interest. All the terms and provisions of this Agreement shall be binding upon, shall inure to the benefit of and shall be enforceable by the parties hereto and the holders from time to time of the Registrable Securities and the respective successors and assigns of the parties hereto and such holders. In the event that any transferee of any holder of Registrable Securities shall acquire Registrable Securities, in any manner, whether by gift, bequest, purchase, operation of law or otherwise, such transferee shall, without any further writing or action of any kind, be deemed a beneficiary hereof for all purposes and such Registrable Securities shall be held subject to all of the terms of this Agreement, and by taking and holding such Registrable Securities such transferee shall be entitled to receive the benefits of, and be conclusively deemed to have agreed to be bound by all of the applicable terms and provisions of this Agreement. If the Company shall so request, any such successor, assign or transferee shall agree in writing to acquire and hold the Registrable Securities subject to all of the applicable terms hereof. (e) Survival. The respective indemnities, agreements, representations, warranties and each other provision set forth in this Agreement or made pursuant hereto shall remain in full force and effect regardless of any investigation (or statement as to the results thereof) made by or on behalf of any holder of Registrable Securities, any director, officer or partner of such holder, any agent or underwriter or any director, officer or partner thereof, or any controlling person of any of the foregoing, and shall survive delivery of and payment for the Registrable Securities pursuant to the Purchase Agreement and the transfer and registration of Registrable Securities by such holder and the consummation of an Exchange Offer. (f) Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York. (g) Headings. The descriptive headings of the several Sections and paragraphs of this Agreement are inserted for convenience only, do not constitute a part of this Agreement and shall not affect in any way the meaning or interpretation of this Agreement. 24

(h) Entire Agreement; Amendments. This Agreement and the other writings referred to herein (including the Indenture and the form of Securities) or delivered pursuant hereto which form a part hereof contain the entire understanding of the parties with respect to its subject matter. This Agreement supersedes all prior agreements and understandings between the parties with respect to its subject matter. This Agreement may be amended and the observance of any term of this Agreement may be waived (either generally or in a particular instance and either retroactively or prospectively) only by a written instrument duly executed by the Company and the Majority Holders of the Registrable Securities at the time outstanding. Each holder of any Registrable Securities at the time or thereafter outstanding shall be bound by any amendment or waiver effected pursuant to this Section 9(h), whether or not any notice, writing or marking indicating such amendment or waiver appears on such Registrable Securities or is delivered to such holder. (i) Inspection. For so long as this Agreement shall be in effect, this Agreement and a complete list of the names and addresses of all the holders of Registrable Securities shall be made available for inspection and copying on any business day by any holder of Registrable Securities for proper purposes only (which shall include any purpose related to the rights of the holders of Registrable Securities under the Securities, the Indenture and this Agreement) at the offices of the Company at the address thereof set forth in Section 9(c) above and at the office of the Trustee under the Indenture. (j) Counterparts. This agreement may be executed by the parties in counterparts, each of which shall be deemed to be an original, but all such respective counterparts shall together constitute one and the same instrument. 25

(k) If the foregoing is in accordance with your understanding, please sign and return to us ten counterparts hereof, and upon the acceptance hereof by you, on behalf of each of the Purchasers, this letter and such acceptance hereof shall constitute a binding agreement between each of the Purchasers and the Company. It is understood that your acceptance of this letter on behalf of each of the Purchasers is pursuant to the authority set forth in a form of Agreement among Purchasers, the form of which shall be submitted to the Company for examination upon request, but without warranty on your part as to the authority of the signers thereof. Very truly yours, Crown Castle International Corp. By:/s/ E. BLAKE HAWK ---------------------------------- Name: E. BLAKE HAWK Title: EXECUTIVE VICE PRESIDENT 26

Accepted as of the date hereof: J.P. Morgan Securities Inc., Goldman, Sachs & Co., Credit Suisse First Boston Corporation, Lehman Brothers Inc., Morgan Stanley & Co. Incorporated, BNY Capital Markets, Inc., Scotia Capital (USA) Inc., The Royal Bank of Scotland plc, By: J.P. Morgan Securities Inc. on behalf of the Purchasers By: /s/ SIGNATURE ILLEGIBLE ----------------------------- 27

Exhibit A Crown Castle International Corp. INSTRUCTION TO DTC PARTICIPANTS - ------------------------------- (Date of Mailing) URGENT - IMMEDIATE ATTENTION REQUESTED DEADLINE FOR RESPONSE: ________* - --------------------- The Depository Trust Company ("DTC") has identified you as a DTC Participant through which beneficial interests in the Crown Castle International Corp. (the "Company") 9 3/8% Senior Notes due 2011 (the "Securities") are held. The Company is in the process of registering the Securities under the Securities Act of 1933 for resale by the beneficial owners thereof. In order to have their Securities included in the registration statement, beneficial owners must complete and return the enclosed Notice of Registration Statement and Selling Securityholder Questionnaire. It is important that beneficial owners of the Securities receive a copy of the - ------------------------------------------------------------------------------ enclosed materials as soon as possible as their rights to have the Securities - -------------------------------------- included in the registration statement depend upon their returning the Notice and Questionnaire by _______. Please forward a copy of the enclosed documents to each beneficial owner that holds interests in the Securities through you. If you require more copies of the enclosed materials or have any questions pertaining to this matter, please contact the General Counsel of Crown Castle International Corp., 510 Bering Drive, Suite 500, Houston, Texas 77057, telephone: (713) 570-3000. __________________ * Not less than 20 days from date of mailing. A-1

Crown Castle International Corp. Notice of Registration Statement and Selling Securityholder Questionnaire - ------------------------------------ (Date) Reference is hereby made to the Agreement (the "Exchange and Registration Rights Agreement") between Crown Castle International Corp. (the "Company") and the Purchasers named therein. Pursuant to the Exchange and Registration Rights Agreement, the Company has filed with the United States Securities and Exchange Commission (the "Commission") a registration statement on Form __ (the "Shelf Registration Statement") for the registration and resale under Rule 415 of the Securities Act of 1933, as amended (the "Securities Act"), of the Company's 9 3/8% Senior Notes due 2011 (the "Securities"). A copy of the Exchange and Registration Rights Agreement is attached hereto. All capitalized terms not otherwise defined herein shall have the meanings ascribed thereto in the Exchange and Registration Rights Agreement. Each beneficial owner of Registrable Securities is entitled to have the Registrable Securities beneficially owned by it included in the Shelf Registration Statement. In order to have Registrable Securities included in the Shelf Registration Statement, this Notice of Registration Statement and Selling Securityholder Questionnaire ("Notice and Questionnaire") must be completed, executed and delivered to the Company's counsel at the address set forth herein for receipt ON OR BEFORE _________. Beneficial owners of Registrable Securities who do not complete, execute and return this Notice and Questionnaire by such date (i) will not be named as selling securityholders in the Shelf Registration Statement and (ii) may not use the Prospectus forming a part thereof for resales of Registrable Securities. Certain legal consequences arise from being named as a selling securityholder in the Shelf Registration Statement and related Prospectus. Accordingly, holders and beneficial owners of Registrable Securities are advised to consult their own securities law counsel regarding the consequences of being named or not being named as a selling securityholder in the Shelf Registration Statement and related Prospectus. A-2

ELECTION The undersigned holder (the "Selling Securityholder") of Registrable Securities hereby elects to include in the Shelf Registration Statement the Registrable Securities beneficially owned by it and listed below in Item (3). The undersigned, by signing and returning this Notice and Questionnaire, agrees to be bound with respect to such Registrable Securities by the terms and conditions of this Notice and Questionnaire and the Exchange and Registration Rights Agreement, including, without limitation, Section 6 of the Exchange and Registration Rights Agreement, as if the undersigned Selling Securityholder were an original party thereto. Upon any sale of Registrable Securities pursuant to the Shelf Registration Statement, the Selling Securityholder will be required to deliver to the Company and Trustee the Notice of Transfer set forth in Appendix A to the Prospectus and as Exhibit B to the Exchange and Registration Rights Agreement. The Selling Securityholder hereby provides the following information to the Company and represents and warrants that such information is accurate and complete: A-3

NOTICE AND QUESTIONNAIRE (1) (a) (a) Full Legal Name of Selling Securityholder: (b) (b) Full Legal Name of Registered Holder (if not the same as in (a) above) of Registrable Securities Listed in Item (3) below are held: (c) Full Legal Name of DTC Participant (if applicable and if not the same as (b) above) Through Which Registrable Securities Listed in Item (3) below are Held: (2) Address for Notices to Selling Securityholder: _______________________________________________________ _______________________________________________________ _______________________________________________________ Telephone: ____________________________________________ Fax: __________________________________________________ Contact Person: _______________________________________ (3) Beneficial Ownership of Registrable Securities: Except as set forth below in this Item (3), the undersigned does not beneficially own any Securities. (a) Principal amount of Registrable Securities beneficially owned:___ CUSIP No(s). of such Registrable Securities:____ (b) Principal amount of Securities of the Company other than Registrable Securities beneficially owned:____ CUSIP No(s). of such other Securities:____ (c) Principal amount of Registrable Securities which the undersigned wishes to be included in the Shelf Registration Statement:____ CUSIP No(s). of such Registrable Securities to be included in the Shelf Registration Statement:_____ (4) Beneficial Ownership of Other Securities of the Company: Except as set forth below in this Item (4), the undersigned Selling Securityholder is not the beneficial or registered owner of any other securities of the Company, other than the Securities listed above in Item (3). A-4

State any exceptions here: (5) Relationships with the Company: Except as set forth below, neither the Selling Securityholder nor any of its affiliates, officers, directors or principal equity holders (5% or more) has held any position or office or has had any other material relationship with the Company (or its predecessors or affiliates) during the past three years. State any exceptions here: _______________________________________________ __________________________________________________________________________ (6) Plan of Distribution: Except as set forth below, the undersigned Selling Securityholder intends to distribute the Registrable Securities listed above in Item (3) only as follows (if at all): Such Registrable Securities may be sold from time to time directly by the undersigned Selling Securityholder or, alternatively, through underwriters, broker-dealers or agents. If the Registrable Securities are sold through underwriters or broker-dealers, the Selling Securityholder will be responsible for underwriting discounts or commissions or agents' commissions. Such Registrable Securities may be sold in one or more transactions at fixed prices, at prevailing market prices at the time of sale, at varying prices determined at the time of sale, or at negotiated prices. Such sales may be effected in transactions (which may involve crosses or block transactions) (i) on any national securities exchange or quotation service on which the Registered Securities may be listed or quoted at the time of sale, (ii) in the over-the-counter market, (iii) in transactions otherwise than on such exchanges or services or in the over-the-counter market, or (iv) through the writing of options. In connection with sales of the Registrable Securities or otherwise, the Selling Securityholder may enter into hedging transactions with broker- dealers, which may in turn engage in short sales of the Registrable Securities in the course of hedging the positions they assume. The Selling Securityholder may also sell Registrable Securities short and deliver Registrable Securities to close out such short positions, or loan or pledge Registrable Securities to broker-dealers that in turn may sell such securities. State any exceptions here:________________________________________________ __________________________________________________________________________ By signing below, the Selling Securityholder acknowledges that it understands its obligation to comply, and agrees that it will comply, with the provisions of the Exchange Act and the rules and regulations thereunder, particularly Regulation M. A-5

In the event that the Selling Securityholder transfers all or any portion of the Registrable Securities listed in Item (3) above after the date on which such information is provided to the Company, the Selling Securityholder agrees to notify the transferee(s) at the time of the transfer of its rights and obligations under this Notice and Questionnaire and the Exchange and Registration Rights Agreement. By signing below, the Selling Securityholder consents to the disclosure of the information contained herein in its answers to Items (1) through (6) above and the inclusion of such information in the Shelf Registration Statement and related Prospectus. The Selling Securityholder understands that such information will be relied upon by the Company in connection with the preparation of the Shelf Registration Statement and related Prospectus. In accordance with the Selling Securityholder's obligation under Section 3(d) of the Exchange and Registration Rights Agreement to provide such information as may be required by law for inclusion in the Shelf Registration Statement, the Selling Securityholder agrees to promptly notify the Company of any inaccuracies or changes in the information provided herein which may occur subsequent to the date hereof at any time while the Shelf Registration Statement remains in effect. All notices hereunder and pursuant to the Exchange and Registration Rights Agreement shall be made in writing, by hand-delivery, first-class mail, or air courier guaranteeing overnight delivery as follows: (i) To the Company: Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 Attention: General Counsel (ii) With a copy to: Cravath, Swaine & Moore Worldwide Plaza 825 Eighth Avenue New York, New York 10019 Attention: Stephen L. Burns, Esq. Once this Notice and Questionnaire is executed by the Selling Securityholder and received by the Company's counsel, the terms of this Notice and Questionnaire, and the representations and warranties contained herein, shall be binding on, shall inure to the benefit of and shall be enforceable by the respective successors, heirs, personal representatives, and assigns of the Company and the Selling Securityholder (with respect to the Registrable Securities beneficially owned by such Selling Securityholder and listed in Item (3) above). This Agreement shall be governed in all respects by the laws of the State of New York. A-6

IN WITNESS WHEREOF, the undersigned, by authority duly given, has caused this Notice and Questionnaire to be executed and delivered either in person or by its duly authorized agent. Dated: _____________________ ____________________________________________________________________ Selling Securityholder (Print/type full legal name of beneficial owner of Registrable Securities) By:_________________________________________________________________ Name: Title: PLEASE RETURN THE COMPLETED AND EXECUTED NOTICE AND QUESTIONNAIRE FOR RECEIPT ON OR BEFORE ______ TO THE COMPANY'S COUNSEL AT: Crown Castle International Corp. 510 Bering Drive, Suite 500 Houston, Texas 77057 Attention: General Counsel A-7

Exhibit B NOTICE OF TRANSFER PURSUANT TO REGISTRATION STATEMENT The Bank of New York Crown Castle International Corp. c/o The Bank of New York 101 Barclay Street New York, New York 10286 Attention: Corporate Trust Administration Re: Crown Castle International Corp. (the "Company") 9 3/8% Senior Notes due 2011 (the "Senior Notes") Dear Sirs: Please be advised that __________ has transferred $_______ aggregate principal amount of the above referenced Senior Notes pursuant to an effective Registration Statement on Form ________ (File No. 333-________) filed by the Company. We hereby certify that the prospectus delivery requirements, if any, of the Securities Act of 1933, as amended, have been satisfied and that the above-named beneficial owner of the Senior Notes is named as a "Selling Securityholder" in the Prospectus dated ________ or in supplements thereto, and that the aggregate principal amount of the Senior Notes transferred are the Notes listed in such Prospectus opposite such owner's name. Dated: Very truly yours, _______________________________ (Name) By: _______________________________ (Authorized Signature) B-1

EXHIBIT 12 CROWN CASTLE INTERNATIONAL CORP. COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (DOLLARS IN THOUSANDS) THREE MONTHS YEARS ENDED DECEMBER 31, ENDED MARCH 31, ------------------------------------------------------- -------------------- 1996 1997 1998 1999 2000 2000 2001 ---- ---- ---- ---- ---- ---- ---- Computation of Earnings: Income (loss) before income taxes, minority interests, extraordinary item and cumulative effect of change in accounting principle $ (947) $(11,893) $(35,747) $(91,316) $(202,324) $(30,508) $(68,639) Add: Fixed charges (as computed below) 1,912 9,825 32,296 126,675 271,994 46,557 74,330 Equity in losses (earnings) of unconsolidated affiliate -- 1,138 (2,055) -- -- -- -- ------- -------- -------- -------- --------- -------- -------- $ 965 $ (930) $ (5,506) $ 35,359 $ 69,670 $ 16,049 $ 5,691 ======= ======== ======== ======== ========= ======== ======== Computation of Fixed Charges and Combined Fixed Charges and Preferred Stock Dividends: Interest expense $ 1,748 $ 7,095 $ 11,179 $ 60,971 $ 160,291 $ 22,622 $ 44,494 Amortization of deferred financing costs and discounts on long-term debt 55 2,159 17,910 49,937 81,003 19,139 22,161 Interest component of operating lease expense 109 571 3,207 15,767 30,700 4,796 7,675 ------- -------- -------- -------- --------- -------- -------- Fixed charges 1,912 9,825 32,296 126,675 271,994 46,557 74,330 Preferred stock dividends -- 2,199 5,411 28,881 59,469 11,493 19,505 ------- -------- -------- -------- --------- -------- -------- Combined fixed charges and preferred stock dividends $ 1,912 $ 12,024 $ 37,707 $155,556 $ 331,463 $ 58,050 $ 93,835 ======= ======== ======== ======== ========= ======== ======== Ratio of Earnings to Fixed Charges -- -- -- -- -- -- -- ======= ======== ======== ======== ========= ======== ======== Deficiency of Earnings to Cover Fixed Charges $ 947 $ 10,755 $ 37,802 $ 91,316 $ 202,324 $ 30,508 $ 68,639 ======= ======== ======== ======== ========= ======== ======== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends -- -- -- -- -- -- -- ======= ======== ======== ======== ========= ======== ======== Deficiency of Earnings to Cover Combined Fixed Charges and Preferred Stock Dividends $ 947 $ 12,954 $ 43,213 $120,197 $ 261,793 $ 42,001 $ 88,144 ======= ======== ======== ======== ========= ======== ========

Exhibit 23.1 The Board of Directors Crown Castle International Corp.: We consent to the use of our reports incorporated herein by reference and to the references to our firm under the headings "Summary Financial and Other Data", "Selected Financial and Other Data" and "Experts" in the prospectus. /s/ KPMG Houston, Texas June 18, 2001

Exhibit 25 FORM T-1 ======================================================== SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------------------ STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ------------------------ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2)__________ ------------------------ THE BANK OF NEW YORK (Exact name of trustee as specified in its charter) New York 13-5160382 (Jurisdiction of incorporation (I.R.S. employer if not a U.S. national bank) identification No.) One Wall Street 10286 New York, NY (Zip Code) (Address of principal executive offices) ------------------------ Crown Castle International Corp. (Exact name of obligor as specified in its charter) Delaware 76-0470458 (State or other jurisdiction of (I.R.S. employer incorporation or organization) identification No.) 510 Bering Drive, Suite 500 77057 Houston, Texas (Zip Code) (Address of principal executive offices) ------------------------ 9-3/8% Senior Notes due 2011 (Title of the indenture securities) ========================================================

GENERAL 1. General Information ------------------- Furnish the following information as to the trustee: (a) Name and address of each examining or supervising authority to which it is subject. Superintendent of Banks of the State of New York, New York, New York and Albany, New York Federal Reserve Bank of New York, New York, New York Federal Deposit Insurance Corporation, Washington D.C. New York Clearing House Association, New York, New York (b) Whether it is authorized to exercise corporate trust powers. The trustee is authorized to exercise corporate trust powers. 2. Affiliations with the Obligor ----------------------------- If the obligor is an affiliate of the trustee, describe each such affiliation. None 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15: Crown Castle International Corp. currently is not in default under any of its outstanding securities for which The Bank of New York is Trustee. Accordingly, responses to Items 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 of Form T-1 are not required under General Instruction B. 16. List of Exhibits ---------------- T-1.1 -- A copy of the Organization Certificate of the Bank of New York (formerly Irving Trust Company) as now in effect, which contains the authority to commence business and a grant of powers to exercise corporate trust powers, is incorporated by reference to Exhibit T-1.1 to Form T-1 filed with the Commission pursuant to the Trust Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990, by Exhibit 1 to Amendment No. 1 to Form T-1 filed with Registration Statement No. 33-6215, Exhibits 1a and 1b to Form T-1 filed with Registration Statement No. 33- 21672 and Exhibit 1 to Form T-1 filed with Registration Statement No. 33-29637. T-1.2 -- Included in Exhibit T-1.1. T-1.3 -- Included in Exhibit T-1.1. T-1.4 -- A copy of the existing By-Laws of The Bank of New York is incorporated by reference to Exhibit T-1.4 to Form T-1 filed with the Commission pursuant to the Trust Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990, by Registration Statement No. 33-31019. T-1.6 -- The consent of the trustee required by Section 321(b) of the Trust Indenture Act of 1939, as amended by the Trust Indenture Reform Act of 1990 is incorporated by reference to Exhibit T-1.6 to Form T-1 by Exhibit 6 to Form T-1 filed with Registration Statement No. 33-44051. T-1.7 -- A copy of the latest report of condition of the trustee pursuant to law or the requirements of its supervising or examining authority.

NOTE ==== In answering Item 2 in this statement of eligibility as to matters peculiarly within the knowledge of the obligor or its directors, the trustee has relied upon information furnished to it by the obligor and will rely on information to be furnished by the obligor and the trustee disclaims responsibility for the accuracy or completeness of such information. -------------------- Pursuant to the requirements of the Trust Indenture Act of 1939, the trustee, United States Trust Company of New York, a corporation organized and existing under the laws of the State of New York, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of New York, and State of New York, on the 19th day of June, 2001. THE BANK OF NEW YORK, Trustee By: /s/ Van Brown ------------------------ Van Brown Vice President

Exhibit T-1.7 Consolidated Report of Condition of THE BANK OF NEW YORK of One Wall Street, New York, N.Y. 10286 And Foreign and Domestic Subsidiaries, a member of the Federal Reserve System, at the close of business December 31, 2000, published in accordance with a call made by the Federal Reserve Bank of this District pursuant to the provisions of the Federal Reserve Act. ASSETS Dollar Amounts In Thousands Cash and balances due from depository institutions: Noninterest-bearing balances and currency and coin...................................................... $3,083,720 Interest-bearing balances ...................................... 4,949,333 Securities: Held-to-maturity securities ................................... 740,315 Available-for-sale securities ................................. 5,328,981 Federal funds sold and Securities purchased under agreements to resell .................................... 5,695,708 Loans and lease financing receivables: Loans and leases, net of unearned income....................................................... 36,590,456 LESS: Allowance for loan and lease losses................................................. 598,536 LESS: Allocated transfer risk reserve...................................................... 12,575 Loans and leases, net of unearned income, allowance, and reserve.................................................. 35,979,345 Trading Assets 11,912,448 Premises and fixed assets (including capitalized leases)............................................ 763,241 Other real estate owned......................................... 2,925 Investments in unconsolidated subsidiaries and associated companies....................................... 183,836 Customers' liability to this bank on acceptances outstanding........................................ 424,303 Intangible assets............................................... 1,378,477 Other assets.................................................... 3,823,797 ----------- Total assets.................................................... $74,266,429 ===========

LIABILITIES Deposits: In domestic offices ............................... $28,328,548 Noninterest-bearing................................ 12,637,384 Interest-bearing................................... 15,691,164 In foreign offices, Edge and Agreement subsidiaries, and IBFs............................ 27,920,690 Noninterest-bearing................................ 470,130 Interest-bearing................................... 27,450,560 Federal funds purchased and Securities sold under agreements to repurchase .................... 1,437,916 Demand notes issued to the U.S.Treasury ............ 100,000 Trading liabilities................................. 2,049,818 Other borrowed money: With remaining maturity of one year or less ............................................. 1,279,125 With remaining maturity of more than one year through three years ......................... 0 With remaining maturity of more than three years ...................................... 31,080 Bank's liability on acceptances executed and outstanding ....................................... 427,110 Subordinated notes and debentures .................. 1,646,000 Other liabilities .................................. 4,604,478 ----------- Total liabilities .................................. $67,824,765 =========== EQUITY CAPITAL Common stock ....................................... 1,135,285 Surplus ............................................ 1,008,775 Undivided profits and capital reserves ............. 4,308,492 Net unrealized holding gains (losses) on available-for-sale securities ..................... 27,768 Accumulated net gains (losses) on cash flow hedges ............................................ 0 Cumulative foreign currency translation adjustments ....................................... (38,656) ----------- Total equity capital ............................... 6,441,664 ----------- Total liabilities and equity capital ............... $74,266,429 ===========

I, Thomas J. Mastro, Senior Vice President and Comptroller of the above- named bank do hereby declare that this Report of Condition has been prepared in conformance with the instructions issued by the Board of Governors of the Federal Reserve System and is true to the best of my knowledge and belief. Thomas J. Mastro We, the undersigned directors, attest to the correctness of this Report of Condition and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the Board of Governors of the Federal Reserve System and is true and correct. Thomas A. Renyi Alan R. Griffith Directors Gerald L. Hassell

Exhibit 99.1 LETTER OF TRANSMITTAL Crown Castle International Corp. Offer for any and all Outstanding 9 3/8% Senior Notes due 2011 in Exchange for Registered 9 3/8% Senior Notes due 2011 Pursuant to the Prospectus, dated , 2001 THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON , 2001, UNLESS EXTENDED (SUCH DATE AND TIME, AS IT MAY BE EXTENDED, THE "EXPIRATION DATE"). TENDERS MAY BE WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE. By Mail: By Overnight Courier: By Hand: By Facsimile: United States Trust United States Trust Company United States Trust Company Fax No. (212) 420-6152 Company of New York of New York (For Eligible Institutions Only) of New York 770 Broadway, 13th Floor 111 Broadway, Lower Level Confirm by telephone: P.O. Box 844 New York, NY 10003 New York, NY 10006 Telephone No. (800) 548-6565 Cooper Station Attn: Corporate Trust Attn: Corporate Trust Services New York, NY 10276-0844 Operations Department (registered or certified mail recommended) Delivery of this instrument to an address other than as set forth above, or transmission of instructions via facsimile other than as set forth above, will not constitute a valid delivery. The undersigned acknowledges that he or she has received the Prospectus, dated , 2001 (the "Prospectus"), of Crown Castle International Corp., a Delaware corporation (the "Company"), and this Letter of Transmittal (the "Letter"), which together constitute the Company's offer (the "Exchange Offer") to exchange an aggregate principal amount of up to $450,000,000 of its 9 3/8% Senior Notes due 2011 (the "New Notes), which have been registered under the Securities Act of 1933, as amended (the "Securities Act") for a like principal amount at maturity of the Company's issued and outstanding 9 3/8% Senior Notes due 2011 (the "Old Notes"). For each Old Note accepted for exchange, the holder of such Old Note will receive a New Note having a principal amount at maturity equal to that of the surrendered Old Note. The New Notes will bear interest from the last interest payment date of the Old Notes to occur prior to the issue date of the New Notes or, if no interest has been paid, from the date of the governing indenture. Interest on the New Notes will accrue at the rate of 9 3/8% per annum and will be payable semiannually on each February 1 and August 1, commencing on August 1, 2001. The New Notes will mature on August 1, 2011. If, with respect to the Old Notes, (i) the Company is required to file a shelf registration statement (the "Shelf Registration Statement") and has not filed such Shelf Registration Statement on or prior to 45 days after such filing obligation arises; or (ii) the Shelf Registration Statement has not been declared effective on or prior to 90 days after its filing; or (iii) the Company fails to consummate the Exchange Offer within 30 business days of the effective date of the registration statement relating to the Exchange Offer; or (iv) the Shelf Registration Statement is declared effective but thereafter ceases to be effective or usable in connection with resales of Registrable Securities during certain specified periods (each such event referred to in clauses (i) through (iv) a "Registration Default"), then commencing on the day after the occurrence of such Registration Default, the Company will pay special interest to each holder of Registrable Securities of the applicable series, with respect to the first 90-day period immediately following the occurrence of the first Registration Default, in an amount equal to $0.05 per week per $1,000 in principal amount at maturity of such Registrable Securities held by such holder. The amount of this special interest will increase by $0.05 per week per $1,000 in principal amount at maturity of such Registrable Securities with respect to each subsequent 90-day period until all Registration Defaults have been cured, up to a maximum amount of special interest for all Registration Defaults of $0.50 per week per $1,000 in principal amount at maturity of such Registrable Securities. Following the cure of all Registration Defaults, the accrual of special interest will cease. Holders of Old Notes accepted for exchange will be deemed to have waived the right to receive any other payments or accrued interest on such Old Notes.

Capitalized terms used but not defined herein shall have the same meaning given them in the Prospectus. The Company reserves the right, at any time or from time to time, to extend the Exchange Offer at its discretion, in which event the term "Expiration Date" shall mean the latest time and date to which the Exchange Offer is extended. The Company shall notify the holders of the Old Notes of any extension as promptly as practicable by oral or written notice thereof. This Letter is to be completed by holders of Old Notes either if certificates are to be forwarded herewith or if a tender of Old Notes, if available, is to be made by book-entry transfer to the account maintained by the Exchange Agent at The Depository Trust Company (the "Book-Entry Transfer Facility") pursuant to the procedures set forth in "The Exchange Offer" section of the Prospectus. Holders of Old Notes whose certificates are not immediately available, or who are unable to deliver their certificates or confirmation of the book-entry tender of their Old Notes into the Exchange Agent's account at the Book-Entry Transfer Facility (a "Book-Entry Confirmation") and all other documents required by this Letter to the Exchange Agent on or prior to the Expiration Date, must tender their Old Notes according to the guaranteed delivery procedures set forth in "The Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus. See Instruction 1. Delivery of documents to the Book-Entry Transfer Facility does not constitute delivery to the Exchange Agent.

The undersigned has completed the appropriate boxes below and signed this Letter to indicate the action the undersigned desires to take with respect to the Exchange Offer. List below the Old Notes to which this Letter relates. If the space provided below is inadequate, the certificate numbers and principal amount at maturity of Old Notes should be listed on a separate signed schedule affixed hereto. - ---------------------------------------------------------------------------------------------------------------------- DESCRIPTION OF OLD NOTES - ---------------------------------------------------------------------------------------------------------------------- 1 2 3 - ---------------------------------------------------------------------------------------------------------------------- Aggregate Principal Principal Amount Name(s) and Address(es) of Registered Holder(s) Certificate Amount at Maturity at Maturity (Please fill in, if blank) Number(s)* of Old Notes Tendered** - ---------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------- --------------------------------------------------------------- --------------------------------------------------------------- Total - ---------------------------------------------------------------------------------------------------------------------- * Need not be completed if Old Notes are being tendered by book-entry transfer. ** Unless otherwise indicated in this column, a holder will be deemed to have tendered ALL of the Old Notes represented by the Old Notes indicated in column 2. See Instruction 2. Old Notes tendered must be in denominations of principal amount at maturity of $1,000 and any integral multiple thereof. See Instruction 1. [_]CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH THE BOOK-ENTRY TRANSFER FACILITY AND COMPLETE THE FOLLOWING: Name of Tendering Institution ______________________________________________ Account Number Transaction Code Number _______________________________ [_]CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE THE FOLLOWING: Name(s) of Registered Holder(s) ____________________________________________ Window Ticket Number (if any) ______________________________________________ Date of Execution of Notice of Guaranteed Delivery _________________________ Name of Institution which guaranteed delivery ______________________________ If Delivered by Book-Entry Transfer, Complete the Following: Account Number Transaction Code Number _______________________________ [_]CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO. Name: ______________________________________________________________________ Address: ___________________________________________________________________ __________________________________________________________________________

PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY Ladies and Gentlemen: Upon the terms and subject to the conditions of the Exchange Offer, the undersigned hereby tenders to the Company the aggregate principal amount at maturity of Old Notes indicated above. Subject to, and effective upon, the acceptance for exchange of the Old Notes tendered hereby, the undersigned hereby sells, assigns and transfers to, or upon the order of, the Company all right, title and interest in and to such Old Notes as are being tendered hereby. The undersigned hereby represents and warrants that the undersigned has full power and authority to tender, sell, assign and transfer the Old Notes tendered hereby and that the Company will acquire good and unencumbered title thereto, free and clear of all liens, restrictions, charges and encumbrances and not subject to any adverse claim when the same are accepted by the Company. The undersigned hereby further represents that any New Notes acquired in exchange for Old Notes tendered hereby will have been acquired in the ordinary course of business of the person receiving such New Notes, whether or not such person is the undersigned, that neither the holder of such Old Notes nor any such other person is engaged in, or intends to engage in a distribution of such New Notes, or has an arrangement or understanding with any person to participate in the distribution of such New Notes, and that neither the holder of such Old Notes nor any such other person is an "affiliate," as defined in Rule 405 under the Securities Act, of the Company. The undersigned also acknowledges that this Exchange Offer is being made by the Company based upon the Company's understanding of an interpretation by the staff of the Securities and Exchange Commission (the "Commission") as set forth in no-action letters issued to third parties, that the New Notes issued in exchange for the Old Notes pursuant to the Exchange Offer may be offered for resale, resold and otherwise transferred by holders thereof (other than any such holder that is an "affiliate" of the Company within the meaning of Rule 405 under the Securities Act), without compliance with the registration and prospectus delivery provisions of the Securities Act, provided that: (1) such holders are not affiliates of the Company within the meaning of Rule 405 under the Securities Act; (2) such New Notes are acquired in the ordinary course of such holders' business; and (3) such holders are not engaged in, and do not intend to engage in, a distribution of such New Notes and have no arrangement or understanding with any person to participate in the distribution of such New Notes. However, the staff of the Commission has not considered the Exchange Offer in the context of a no-action letter, and there can be no assurance that the staff of the Commission would make a similar determination with respect to the Exchange Offer as in other circumstances. If a holder of Old Notes is an affiliate of the Company, and is engaged in or intends to engage in a distribution of the New Notes or has any arrangement or understanding with respect to the distribution of the New Notes to be acquired pursuant to the Exchange Offer, such holder could not rely on the applicable interpretations of the staff of the Commission and must comply with the registration and prospectus delivery requirements of the Securities Act in connection with any secondary resale transaction. If the undersigned is a broker-dealer that will receive New Notes for its own account in exchange for Old Notes, it represents that the Old Notes to be exchanged for the New Notes were acquired by it as a result of market-making activities or other trading activities and acknowledges that it will deliver a prospectus in connection with any resale of such New Notes; however, by so acknowledging and by delivering a prospectus, the undersigned will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. The undersigned will, upon request, execute and deliver any additional documents deemed by the Company to be necessary or desirable to complete the sale, assignment and transfer of the Old Notes tendered hereby. All authority conferred or agreed to be conferred in this Letter and every obligation of the undersigned hereunder shall be binding upon the successors, assigns, heirs, executors, administrators, trustees in bankruptcy and legal representatives of the undersigned and shall not be affected by, and shall survive, the death or incapacity of the undersigned. This tender may be withdrawn only in accordance with the procedures set forth in "The Exchange Offer--Withdrawal of Tenders" section of the Prospectus.

Unless otherwise indicated herein in the box entitled "Special Issuance Instructions" below, please deliver the New Notes in the name of the undersigned or, in the case of a book-entry delivery of Old Notes, please credit the account indicated above maintained at the Book-Entry Transfer Facility. Similarly, unless otherwise indicated under the box entitled "Special Delivery Instructions" below, please send the New Notes (and, if applicable, substitute certificates representing Old Notes for any Old Notes not exchanged) to the undersigned at the address shown above in the box entitled "Description of Old Notes." THE UNDERSIGNED, BY COMPLETING THE BOX ENTITLED "DESCRIPTION OF OLD NOTES " ABOVE AND SIGNING THIS LETTER, WILL BE DEEMED TO HAVE TENDERED THE OLD NOTES AS SET FORTH IN SUCH BOX ABOVE. SPECIAL ISSUANCE INSTRUCTIONS SPECIAL DELIVERY INSTRUCTIONS (See Instructions 3 and 4) (See Instructions 3 and 4) To be completed ONLY if To be completed ONLY if certificates for Old Notes not certificates for Old Notes not tendered and/or New Notes are to tendered and/or New Notes are to be sent to someone other than be issued in the name of and the person(s) whose signature(s) sent to someone other than the appear(s) on this Letter above person(s) whose signature(s) or to such person(s) at an appear(s) on this Letter above, address other than shown in the or if Old Notes delivered by box entitled "Description of Old book-entry transfer which are Notes" on this Letter above. not accepted for exchange are to be returned by credit to an Mail: New Notes and/or Old Notes account maintained at the Book- to: Entry Transfer Facility other than the account indicated Name(s): ________________________ above. (Please Type or Print) _________________________________ Issue: New Notes and/or Old (Please Type or Print) Notes to: Address: ________________________ Name(s): ________________________ _________________________________ Please Type or Print (Including Zip Code) _________________________________ (Please Type or Print) Address: ________________________ _________________________________ (Including Zip Code) (Complete accompanying Substitute Form W-9) [_] Credit unexchanged Old Notes delivered by book-entry transfer to the Book-Entry Transfer Facility account set forth below. _________________________________ (Book-Entry Transfer Facility Account Number, if applicable) IMPORTANT: THIS LETTER OR A FACSIMILE HEREOF (TOGETHER WITH THE CERTIFICATES FOR OLD NOTES OR A BOOK-ENTRY CONFIRMATION AND ALL OTHER REQUIRED DOCUMENTS OR THE NOTICE OF GUARANTEED DELIVERY) MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON THE EXPIRATION DATE. PLEASE READ THIS ENTIRE LETTER OF TRANSMITTAL CAREFULLY BEFORE COMPLETING ANY BOX ABOVE.

PLEASE SIGN HERE (TO BE COMPLETED BY ALL TENDERING HOLDERS) (Complete accompanying Substitute Form W-9 on reverse side) Dated: ______________________________________________________________ , 1999 x: _________________________________ _____________________________ , 1999 x: _________________________________ _____________________________ , 1999 (Signature(s) of Owner(s)) (Date) Area Code and Telephone Number: _____________________________________________ If a holder is tendering any Old Notes, this Letter must be signed by the registered holder(s) as the name(s) appear(s) on the certificate(s) for the Old Notes or by any person(s) authorized to become registered holder(s) by endorsements and documents transmitted herewith. If signature is by trustee, executor, administrator, guardian, officer or other person acting in a fiduciary or representative capacity, please set forth full title. See Instruction 3. Name(s): _____________________________________________________________________ ______________________________________________________________________________ (Please Type or Print) Capacity: ____________________________________________________________________ Address: _____________________________________________________________________ ______________________________________________________________________________ (Including Zip Code) SIGNATURE GUARANTEE (if Required by Instruction 3) Signature Guaranteed by an Eligible Institution: _____________________________________________________ (Authorized Signature) ______________________________________________________________________________ (Title) ______________________________________________________________________________ (Name and Firm) Dated: ______________________________________________________________ , 1999

INSTRUCTIONS Forming Part of the Terms and Conditions of the Offer to Exchange Outstanding 9 3/8% Senior Notes due 2011 for Registered 9 3/8% Senior Notes due 2011 1. Delivery of this Letter and Notes; Guaranteed Delivery Procedures. This Letter is to be completed by holders of Old Notes either if certificates are to be forwarded herewith or if tenders are to be made pursuant to the procedures for delivery by book-entry transfer set forth in "The Exchange Offer--Procedures for Tendering" section of the Prospectus. Certificates for all physically tendered Old Notes, or Book-Entry Confirmation, as the case may be, as well as a properly completed and duly executed Letter of Transmittal (or facsimile thereof) and any other documents required by this Letter, must be received by the Exchange Agent at the address set forth herein on or prior to the Expiration Date, or the tendering holder must comply with the guaranteed delivery procedures set forth below. Old Notes tendered hereby must be in denominations of principal amount at maturity of $1,000 and any integral multiple thereof. Holders of Old Notes whose certificates for Old Notes are not immediately available or who cannot deliver their certificates and all other required documents to the Exchange Agent on or prior to the Expiration Date, or who cannot complete the procedure for book-entry transfer on a timely basis, may tender their Old Notes pursuant to the guaranteed delivery procedures set forth in "The Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus. Pursuant to such procedures, (i) such tender must be made through an Eligible Institution (as defined below), (ii) prior to the Expiration Date, the Exchange Agent must receive from such Eligible Institution a properly completed and duly executed Letter (or facsimile thereof) and Notice of Guaranteed Delivery, substantially in the form provided by the Company (by facsimile transmission, mail or hand delivery), setting forth the name and address of the holder of Old Notes, the certificate number or numbers of such Old Notes and the principal amount at maturity of Old Notes tendered, stating that the tender is being made thereby and guaranteeing that within five business days after the Expiration Date, the Letter (or facsimile thereof), together with the certificate or certificates representing the Old Notes to be tendered in proper form for transfer, or a Book-Entry Confirmation, as the case may be, and any other documents required by this Letter will be deposited by the Eligible Institution with the Exchange Agent, and (iii) such properly completed and executed Letter (or facsimile thereof), as well as the certificate or certificates representing all tendered Old Notes in proper form for transfer, or a Book-Entry Confirmation, as the case may be, and all other documents required by this Letter are received by the Exchange Agent within five business days after the Expiration Date. The method of delivery of this Letter, the Old Notes and all other required documents is at the election and risk of the tendering holders. Instead of delivery by mail, it is recommended that holders use an overnight or hand delivery service. In all cases, sufficient time should be allowed to assure delivery to the Exchange Agent before the Expiration Date. No Letter of Transmittal or Old Notes should be sent to the Company. Holders may request their respective brokers, dealers, commercial banks, trust companies or nominees to effect the tenders for such holders. See "The Exchange Offer" section of the Prospectus. 2. Partial Tenders; Withdrawals. If less than all of the Old Notes evidenced by a submitted certificate are to be tendered, the tendering holder(s) should fill in the aggregate principal amount at maturity of Old Notes tendered in the box entitled "Description of Old Notes--Principal Amount at Maturity Tendered." A newly issued certificate for the Old Notes submitted but not tendered will be sent to such holder as soon as practicable after the Expiration Date. All Old Notes delivered to the Exchange Agent will be deemed to have been tendered unless otherwise clearly indicated.

If not yet accepted, a tender pursuant to the Exchange Offer may be withdrawn prior to the Expiration Date. To be effective with respect to the tender of Old Notes, a notice of withdrawal must: (i) be received by the Exchange Agent before the Company notifies the Exchange Agent that it has accepted the tender of Old Notes pursuant to the Exchange Offer; (ii) specify the name of the Old Notes; (iii) contain a description of the Old Notes to be withdrawn, the certificate numbers shown on the particular certificates evidencing such Old Notes and the principal amount at maturity of Old Notes represented by such certificates; and (iv) be signed by the holder in the same manner as the original signature on this Letter (including any required signature guarantee). The Exchange Agent will return the properly withdrawn Old Notes promptly following receipt of notice of withdrawal. If Old Notes have been tendered pursuant to the procedure for book-entry transfer, any notice of withdrawal must specify the name and number of the account at the book-entry transfer facility to be credited with the withdrawn Old Notes or otherwise comply with the book-entry transfer facility's procedures. All questions as to the validity of notices of withdrawals, including time of receipt, will be determined by the Company, and such determination will be final and binding on all parties. 3. Signatures on this Letter, Bond Powers and Endorsements; Guarantee of Signatures. If this Letter is signed by the registered holder of the Old Notes tendered hereby, the signature must correspond exactly with the name as written on the face of the certificates without alteration, enlargement or any change whatsoever. If any tendered Old Notes are owned of record by two or more joint owners, all such owners must sign this Letter. If any tendered Old Notes are registered in different names on several certificates, it will be necessary to complete, sign and submit as many separate copies of this Letter as there are different registrations of certificates. When this Letter is signed by the registered holder (which term, for the purposes described herein, shall include the book-entry transfer facility whose name appears on a security listing as the owner of the Old Notes) of the Old Notes specified herein and tendered hereby, no endorsements of certificates or separate bond powers are required. If, however, the New Notes are to be issued to a person other than the registered holder, then endorsements of any certificates transmitted hereby or separate bond powers are required. Signatures on such certificate(s) must be guaranteed by an Eligible Institution (as defined below). If this Letter is signed by a person other than the registered holder or holders of any Old Notes specified therein, such certificate(s) must be endorsed by such registered holder(s) or accompanied by separate written instruments of transfer or endorsed in blank by such registered holder(s) exchange in form satisfactory to the Company and duly executed by the registered holder, in either case signed exactly as such registered holder(s) name or names appear(s) on the Old Notes. If the Letter or any certificates of Old Notes or separate written instruments of transfer or exchange are signed or endorsed by trustees, executors, administrators, guardians, attorney-in-fact, officers of corporations or others acting in a fiduciary or representative capacity, such persons should so indicate when signing, and unless waived by the Company, evidence satisfactory to the Company of their authority to so act must be submitted with the Letter. Signature on a Letter or a notice of withdrawal, as the case may be, must be guaranteed by an Eligible Institution unless the Old Notes tendered pursuant thereto are tendered (i) by a registered holder who has not completed the box entitled "Special Payment Instructions" or "Special Delivery Instructions" on the Letter or (ii) for the account of an Eligible Institution. In the event that signatures on a Letter or a notice of withdrawal, as the case may be, are required to be guaranteed, such guarantee must be by a member firm of a registered national securities exchange or of the National Association of Securities Dealers, Inc., a commercial bank or trust company having an office or correspondent in the United States or an "eligible guarantor institution" within the meaning of Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended (an "Eligible Institution").

4. Special Issuance and Delivery Instructions. Tendering holders of Old Notes should indicate in the applicable box the name and address to which New Notes issued pursuant to the Exchange Offer are to be issued or sent, if different from the name or address of the person signing this Letter. In the case of issuance in a different name, the employer identification or social security number of the person named must also be indicated. Holders tendering Old Notes by book-entry transfer may request that Old Notes not exchanged be credited to such account maintained at the Book- Entry Transfer Facility as such noteholder may designate hereon. If no such instructions are given, such Old Notes not exchanged will be returned to the name or address of the person signing this Letter. 5. Tax Identification Number. Federal income tax law generally requires that a tendering holder whose Old Notes are accepted for exchange must provide the Company (as payor) with such holder's correct Taxpayer Identification Number ("TIN") on Substitute Form W-9 below or otherwise establish a basis for exemption from backup withholding. If such holder is an individual, the TIN is his or her social security number. If the Company is not provided with the current TIN or an adequate basis for an exemption, such tendering holder may be subject to a $50 penalty imposed by the Internal Revenue Service. In addition, delivery to such tendering holder of New Notes may be subject to backup withholding in an amount equal to 31% of all reportable payments made after the exchange. Certain holders (including, among others, all corporations and certain foreign individuals) are not subject to these backup withholding and reporting requirements. See the enclosed Guidelines of Certification of Taxpayer Identification Number on Substitute Form W-9 (the "W-9 Guidelines") for additional instructions. To prevent backup withholding, each tendering holder of Old Notes must provide its correct TIN by completing the "Substitute Form W-9" set forth below, certifying that the TIN provided is correct (or that such holder is awaiting a TIN) and that (i) the holder is exempt from backup withholding, (ii) the holder has not been notified by the Internal Revenue Service that such holder is subject to a backup withholding as a result of a failure to report all interest or dividends or (iii) the Internal Revenue Service has notified the holder that such holder is no longer subject to backup withholding. If the tendering holder of Old Notes is a nonresident alien or foreign entity not subject to backup withholding, such holder must give the Company a completed Form W-8, Certificate of Foreign Status. These forms may be obtained from the Exchange Agent. If the Old Notes are in more than one name or are not in the name of the actual owner, such holder should consult the W-9 Guidelines for information on which TIN to report. If such holder does not have a TIN, such holder should consult the W-9 Guidelines for instructions on applying for a TIN, check the box in Part 2 of the Substitute Form W-9, write "applied for" in lieu of its TIN and complete the Certificate of Awaiting Taxpayer Identification Number. Note: checking this box and writing "applied for" on the form means that such holder has already applied for a TIN or that such holder intends to apply for one in the near future. If a holder checks the box in Part 2 of the Substitute Form W-9 and writes "applied for" on that form, backup withholding at a 31% rate will nevertheless apply to all reportable payments made to such holder. If such a holder furnishes its TIN to the Company within 60 days, however, any amounts so withheld shall be refunded to such holder. Backup withholding is not an additional Federal income tax. Rather, the Federal income tax liability of persons subject to backup withholding will be reduced by the amount of tax withheld. If withholding results in overpayment of taxes, a refund may be obtained from the Internal Revenue Service.

6. Transfer Taxes. Holders who tender their Old Notes for exchange will not be obligated to pay any transfer taxes in connection therewith. If, however, New Notes are to be delivered to, or are to be issued in the name of, any person other than the registered holder of the Old Notes tendered hereby, or if tendered Old Notes are registered in the name of any person other than the person signing this Letter, or if a transfer tax is imposed for any reason other than the exchange of Old Notes in connection with the Exchange Offer, the amount of any such transfer taxes (whether imposed on the registered holder or any other persons) will be payable by the tendering holder. If satisfactory evidence of payment of such taxes or exemption therefrom is not submitted herewith, the amount of such transfer taxes will be billed directly to such tendering holder. Except as provided in this Instruction 5, it will not be necessary for transfer tax stamps to be affixed to the Old Notes specified in this Letter. 7. Waiver of Conditions. The Company reserves the right to waive satisfaction of any or all conditions enumerated in the Prospectus. 8. No Conditional Tenders. No alternative, conditional, irregular or contingent tenders will be accepted. All tendering holders of Old Notes by execution of this Letter, shall waive any right to receive notice of the acceptance of their Old Notes for exchange. Neither the Company, the Exchange Agent nor any other person is obligated to give notice of any defect or irregularity with respect to any tender of Old Notes nor shall any of them incur any liability for failure to give any such notice. 9. Mutilated, Lost, Stolen or Destroyed Old Notes. Any holder whose Old Notes have been mutilated, lost, stolen or destroyed should contact the Exchange Agent at the address indicated above for further instructions. 10. Requests for Assistance or Additional Copies. Questions relating to the procedure for tendering, as well as requests for additional copies of the Prospectus and this Letter, may be directed to the Exchange Agent, at the address and telephone number indicated above.

TO BE COMPLETED BY ALL TENDERING HOLDERS (See Instruction 5) PAYOR'S NAME: CROWN CASTLE INTERNATIONAL CORP. - -------------------------------------------------------------------------------- SUBSTITUTE Part 1--PLEASE PROVIDE YOUR TIN:------------------- Form W-9 TIN IN THE BOX AT RIGHT AND Social Security Number CERTIFY BY SIGNING AND or DATING BELOW Employer Identification Number Department of the Treasury Internal ---------------------------------------------------------- Revenue Part 2--TIN Applied Service For [_] Payor's ---------------------------------------------------------- Request for Taxpayer CERTIFICATION--UNDER PENALTIES OF PERJURY, I CERTIFY Identification THAT: Number ("TIN") and (1) the number shown on this form is my correct Certification Taxpayer Identification Number (or I am waiting for a number to be issued to me), (2) I am not subject to backup withholding because (a) I am exempt from backup withholding, (b) I have not been notified by the Internal Revenue Service (the "IRS") that I am subject to backup withholding as a result of a failure to report all interest or dividends, or (c) the IRS has notified me that I am no longer subject to backup withholding, and (3) any other information provided on this form is true and correct. Signature ________________________ Date __________ - -------------------------------------------------------------------------------- You must cross out item (2) of the above certification if you have been notified by the IRS that you are subject to backup withholding because of underreporting of interest or dividends on your tax returns and you have not been notified by the IRS that you are no longer subject to backup withholding. YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 2 OF SUBSTITUTE FORM W-9. CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER I certify under penalties of perjury that a taxpayer identification number has not been issued to me, and either (a) I have mailed or delivered an application to receive a taxpayer identification number to the appropriate Internal Revenue Service Center or Social Security Administration Office or (b) I intend to mail or deliver an application in the near future. I understand that if I do not provide a taxpayer identification number by the time of payment, 31 percent of all reportable cash payments made to me thereafter will be withheld until I provide a number. Signature: ____________________________________ Date: ______________

Exhibit 99.2 NOTICE OF GUARANTEED DELIVERY FOR CROWN CASTLE INTERNATIONAL CORP. This form or one substantially equivalent hereto must be used to accept the Exchange Offer of Crown Castle International Corp. (the "Company") made pursuant to the Prospectus, dated , 2001 (the "Prospectus"), and the enclosed Letter of Transmittal (the "Letter of Transmittal") if certificates for Old Notes of the Company are not immediately available or if the procedure for book-entry transfer cannot be completed on a timely basis or time will not permit all required documents to reach the Company prior to 5:00 P.M., New York City time, on the Expiration Date of the Exchange Offer. Such form may be delivered or transmitted by facsimile transmission, mail or hand delivery to United States Trust Company of New York (the "Exchange Agent") as set forth below. In addition, in order to utilize the guaranteed delivery procedure to tender Old Notes pursuant to the Exchange Offer, a completed, signed and dated Letter of Transmittal (or facsimile thereof) must also be received by the Exchange Agent prior to 5:00 P.M., New York City time, on the Expiration Date. Capitalized terms not defined herein are defined in the Prospectus. Delivery To: United States Trust Company of New York, Exchange Agent By Mail: By Overnight Courier: By Hand: By Facsimile: United States Trust Company United States Trust Company United States Trust Company Fax No. (212) 420-6152 of New York of New York of New York (For Eligible Institutions Only) P.O. Box 844 770 Broadway, 13th Floor 111 Broadway, Lower Level Confirm by telephone: Cooper Station New York, NY 10003 New York, NY 10006 Telephone No. (800) 548-6565 New York, NY 10276-0844 Attn: Corporate Trust Attn: Corporate Trust Services (registered or certified Operations Department mail recommended) Delivery of this instrument to an address other than as set forth above, or transmission of instructions via facsimile other than as set forth above, will not constitute a valid delivery. Ladies and Gentlemen: Upon the terms and conditions set forth in the Prospectus and the accompanying Letter of Transmittal, the undersigned hereby tenders to the Company the principal amount at maturity of Old Notes set forth below, pursuant to the guaranteed delivery procedure described in "The Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus. Principal Amount of Old Notes Tendered:* $ ____________________________________ Certificate Nos. (if available): If Old Notes will be delivered by book-entry transfer to The Depository Trust Company, provide account number. ______________________________________ Total Principal Amount Represented by Old Notes Certificate(s): $ ____________________________________ Account Number _______________________ * Must be in denominations of principal amount at maturity of $1,000 and any integral multiple thereof.

All authority herein conferred or agreed to be conferred shall survive the death or incapacity of the undersigned, and every obligation of the undersigned hereunder shall be binding upon the heirs, personal representatives, successors and assigns of the undersigned. PLEASE SIGN HERE X ___________________________________ ____________________________________ X __________________________________ ____________________________________ Signature(s) of Owner(s) Date or authorized Signatory Area Code and Telephone Number:_____________________________________________ Must be signed by the holder(s) of Old Notes as the name(s) of such holder(s) appear(s) on the certificate(s) for the Old Notes or on a security position listing, or by person(s) authorized to become registered holder(s) by endorsement and documents transmitted with this Notice of Guaranteed Delivery. If any signature is by a trustee, executor, administrator, guardian, attorney-in-fact, officer or other person acting in a fiduciary or representative capacity, such person must set forth his or her full title below. Please print name(s) and address(es) Name(s):_____________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ Capacity:____________________________________________________________________ Address(es):_________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ GUARANTEE The undersigned, a member of a registered national securities exchange, or a member of the National Association of Securities Dealers, Inc., or a commercial bank trust company having an office or correspondent in the United States, or an "eligible guarantor institution" within the meaning of Rule 17Ad-15 of the Securities Exchange Act of 1934, as amended, hereby guarantees that the certificates representing the principal amount at maturity of Old Notes tendered hereby in proper form for transfer, or timely confirmation of the book-entry transfer of such Old Notes into the Exchange Agent's account at United States Trust Company of New York pursuant to the procedures set forth in "The Exchange Offer--Guaranteed Delivery Procedures" section of the Prospectus, together with a properly completed and duly executed Letter of Transmittal (or facsimile thereof) with any required signature guarantee and any other documents required by the Letter of Transmittal, will be received by the Exchange Agent at the address set forth above, within five business days after the Expiration Date. _____________________________________ ____________________________________ Name of Firm Authorized Signature ____________________________________ Title _____________________________________ Name:_______________________________ Address (Please Type or Print) _____________________________________ Dated:______________________________ Zip Code Area Code and Tel. No.:______________ NOTE: DO NO SEND CERTIFICATES FOR OLD NOTES WITH THIS FORM. CERTIFICATES FOR OLD NOTES SHOULD ONLY BE SENT WITH YOUR LETTER OF TRANSMITTAL.

Exhibit 99.3 CROWN CASTLE INTERNATIONAL CORP. Offer for any and all Outstanding 9 3/8% Senior Notes due 2011 in Exchange for Registered 9 3/8% Senior Notes due 2011 To: Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees Crown Castle International Corp. (the "Company") is offering to exchange (the "Exchange Offer"), upon and subject to the terms and conditions set forth in the Prospectus, dated , 2001 (the "Prospectus"), and the enclosed Letter of Transmittal (the "Letter of Transmittal"), its 9 3/8% Senior Notes due 2011, which have been registered under the Securities Act of 1933, as amended (the "Securities Act"), for its outstanding 9 3/8% Senior Notes due 2011 (the "Old Notes"). The Exchange Offer is being made in order to satisfy certain obligations of the Company contained in the Registration Rights Agreement dated as of May 15, 2001, between the Company and the initial purchasers referred to therein. We are requesting that you contact your clients for whom you hold Old Notes regarding the Exchange Offer. For your information and for forwarding to your clients for whom you hold Old Notes registered in your name or in the name of your nominee, or who hold Old Notes registered in their own names, we are enclosing the following documents: 1. Prospectus dated , 2001; 2. The Letter of Transmittal for your use and for the information of your clients; 3. A Notice of Guaranteed Delivery to be used to accept the Exchange Offer if certificates for Old Notes are not immediately available or time will not permit all required documents to reach the Exchange Agent prior to the Expiration Date (as defined below) or if the procedure for book-entry transfer cannot be completed on a timely basis; 4. A form of letter which may be sent to your clients for whose account you hold Old Notes registered in your name or the name of your nominee, with space provided for obtaining such clients' instructions with regard to the Exchange Offer; 5. Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9; and 6. Return envelopes addressed to United States Trust Company of New York, the Exchange Agent for the Old Notes. Your prompt action is requested. The Exchange Offer will expire at 5:00 p.m., New York City time, on , 2001 (the "Expiration Date") (20 business days following the commencement of the Exchange Offer), unless extended by the Company. The Old Notes tendered pursuant to the Exchange Offer may be withdrawn at any time before 5:00 p.m, New York City time, on the Expiration Date. To participate in the Exchange Offer, a duly executed and properly completed Letter of Transmittal (or facsimile thereof), with any required signature guarantees and any other required documents, should be sent to the Exchange Agent and certificates representing the Old Notes should be delivered to the Exchange Agent, all in accordance with the instructions set forth in the Letter of Transmittal and the Prospectus. If holders of Old Notes wish to tender, but it is impracticable for them to forward their certificates for Old Notes prior to the expiration of the Exchange Offer or to comply with the book-entry transfer

procedures on a timely basis, a tender may be effected by following the guaranteed delivery procedures described in the Prospectus under "The Exchange Offer--Guaranteed Delivery Procedures." Any inquiries you may have with respect to the Exchange Offer, or requests for additional copies of the enclosed materials should be directed to the Exchange Agent for the Old Notes, at its address and telephone number set forth on the front of the Letter of Transmittal. Very truly yours, Crown Castle International Corp. NOTHING HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU OR ANY OTHER PERSON AS AN AGENT OF THE COMPANY OR THE EXCHANGE AGENT, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENTS ON BEHALF OF EITHER OF THEM WITH RESPECT TO THE EXCHANGE OFFER, EXCEPT FOR STATEMENTS EXPRESSLY MADE IN THE PROSPECTUS OR THE LETTER OF TRANSMITTAL. Enclosures

Exhibit 99.4 CROWN CASTLE INTERNATIONAL CORP. Offer for any and all Outstanding 9 3/8% Senior Notes due 2011 in Exchange for Registered 9 3/8% Senior Notes due 2011 To Our Clients: Enclosed for your consideration is a Prospectus, dated , 2001 (the "Prospectus"), and the enclosed Letter of Transmittal (the "Letter of Transmittal"), relating to the offer (the "Exchange Offer") of Crown Castle International Corp. (the "Company") to exchange its 9 3/8% Senior Notes due 2011, which have been registered under the Securities Act of 1933, as amended, for its outstanding 9 3/8% Senior Notes due 2011 (the "Old Notes"), upon the terms and subject to the conditions described in the Prospectus. The Exchange Offer is being made in order to satisfy certain obligations of the Company contained in the Registration Rights Agreement dated as of May 15, 2001 between the Company and the initial purchasers referred to therein. This material is being forwarded to you as the beneficial owner of the Old Notes carried by us in your account but not registered in your name. A tender of such Old Notes may only be made by us as the holder of record and pursuant to your instructions. Accordingly, we request instructions as to whether you wish us to tender on your behalf the Old Notes held by us for your account, pursuant to the terms and conditions set forth in the enclosed Prospectus and Letter of Transmittal. Your instructions should be forwarded to us as promptly as possible in order to permit us to tender the Old Notes on your behalf in accordance with the provisions of the Exchange Offer. The Exchange Offer will expire at 5:00 p.m., New York City time, on , 2001 (the "Expiration Date") (20 business days following the commencement of the Exchange Offer) unless extended by the Company. Any Old Notes tendered pursuant to the Exchange Offer may be withdrawn at any time before 5:00 p.m., New York City time, on the Expiration Date. Your attention is directed to the following: 1. The Exchange Offer is for any and all Old Notes. 2. The Exchange Offer is subject to certain conditions set forth in the Prospectus in the section captioned "The Exchange Offer--Conditions to the Exchange Offer." 3. The Exchange Offer expires at 5:00 p.m., New York City time, on the Expiration Date, unless extended by the Company. If you wish to tender your Old Notes, please so instruct us by completing, executing and returning to us the instruction form on the back of this letter. The Letter of Transmittal is furnished to you for information only and may not be used directly by you to tender Old Notes.

INSTRUCTIONS WITH RESPECT TO THE EXCHANGE OFFER The undersigned acknowledge(s) receipt of your letter and the enclosed material referred to therein relating to the Exchange Offer made by Crown Castle International Corp. with respect to its Old Notes. This will instruct you to tender the Old Senior Notes or Old Senior Discount Notes held by you for the account of the undersigned, upon and subject to terms and conditions set forth in the Prospectus and the related Letter of Transmittal. Please tender the Old Notes held by you for my account as indicated below: Aggregate Principal Amount of Old Senior Notes 9 3/8% Senior Notes due 2011......... ---------------------------------------- (must be an integral multiple of $1,000) [_] Please do not tender any Old Senior Notes held by you for my account. Dated: , 2001 ---------------------------------------- ---------------------------------------- Signature(s) ---------------------------------------- ---------------------------------------- ---------------------------------------- Please print name(s) here ---------------------------------------- ---------------------------------------- Address(es) ---------------------------------------- Area Code(s) and Telephone Number(s) ---------------------------------------- Tax Identification or Social Security No(s). None of the Old Notes held by us for your account will be tendered unless we receive written instructions from you to do so. Unless a specific contrary instruction is given in the space provided, your signature(s) hereon shall constitute an instruction to us to tender all the Old Notes held by us for your account.

Exhibit 99.5 GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 Guidelines for Determining the Proper Identification Number to Give the Payer.--Social Security numbers have nine digits separated by two hyphens: i.e. 000-00-0000. Employer identification numbers have nine digits separated by only one hyphen: i.e., 00-0000000. The table below will help determine the number to give the payer. - -------------------------------------------------------- ------------------------------------------------------------ Give the Give the EMPLOYER For this type of account: SOCIAL SECURITY For this type of account: IDENTIFICATION number of -- number of -- - -------------------------------------------------------- ------------------------------------------------------------ 1. An individual's account The individual 8. Sole proprietorship account The owner(4) 2. Two or more individuals The actual owner 9. A valid trust, estate, or The legal entity (joint account) of the account pension trust (do not furnish or, if combined the identifying funds, any one number of the of the personal individuals(1) representative or trustee unless the legal entity itself is not designated in the account title.)(5) 3. Husband and wife (joint The actual owner 10. Corporate account The corporation account) of the account or, if joint funds, either person(1) 4. Custodian account of a The minor(2) 11. Religious, charitable, minor (Uniform Gift to educational or other tax- Minors Act) exempt organization account The organization 5. Adult and minor (joint The adult or, if 12. Partnership account held in account) the minor is the the name of the business The partnership only contributor, the minor(1) 6. Account in the name of The ward, minor, 13. Association, club, or other guardian or committee for a or the tax-exempt organization The organization designated ward, minor, or incompetent incompetent person person(3) 14. A broker or registered nominee The broker or nominee 7. a. The usual revocable sav- The grantor- 15. Account with the Department of The public entity ings trust account trustee(1) Agriculture in the name of a (grantor is also trustee) public entity (such as a State b. So-called trust account The actual or local government, school that is not a legal or owner(1) district, or prison) that valid trust under State receives agricultural program law payments - -------------------------------------------------------- ------------------------------------------------------------ (1) List all names first and circle the name of the person whose number you furnish. If only one person on a joint account has a Social Security number, that person's number must be furnished. (2) Circle the minor's name and furnish the minor's social security number. (3) Circle the ward's, minor's or incompetent person's name and furnish such person's social security number. (4) You must show your individual name, but you may also enter your business or "doing business as" name. You may use either your Social Security number or employer identification number (if you have one). (5) List first and circle the name of the legal trust, estate, or pension trust. Note: If no name is circled when there is more than one name, the number will be considered to be that of the first name listed.

GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 Page 2 Obtaining a Number If you don't have a taxpayer identification number or you don't know your number, obtain Form SS-5, Application for a Social Security Number Card, or Form SS-4, Application for Employer Identification Number (for business and all other entities), at the local office of the Social Security Administration or the Internal Revenue Service and apply for a number. Payees Exempt from Backup Withholding Payees specifically exempt from backup withholding on ALL payments include the following: . A corporation. . A financial institution. . An organization exempt from tax under Section 501(a), of the Internal Reve- nue Code of 1986, as amended (the "Code"), or an individual retirement plan, or a custodial account under Section 403(b)(7), if the account satis- fies the requirements of Section 401(f)(7). . The United States or any agency or instrumentalities. . A State, the District of Columbia, a possession of the United States, or any political subdivision or instrumentality thereof. . A foreign government, a political subdivision of a foreign government, or any agency or instrumentality thereof. . An international organization or any agency, or instrumentality thereof. . A registered dealer in securities or commodities registered in the U.S., the District of Columbia or a possession of the U.S. . A real estate investment trust. . A common trust fund operated by a bank under Section 584(a) of the Code. . An exempt charitable remainder trust, or a non-exempt trust described in Section 4947(a)(1) of the Code. . An entity registered at all times under the Investment Company Act of 1940. . A foreign central bank of issue. . A middleman known in the investment community as a nominee or who is listed in the most recent publication of the American Society of Corporate Secre- taries, Inc., Nominee List. Payments of dividends and patronage dividends not generally subject to backup withholding include the following: . Payments to nonresident aliens subject to withholding under Section 1441 of the Code. . Payments to partnerships not engaged in a trade or business in the U.S. and which have at least one nonresident partner. . Payments of patronage dividends where the amount received is not paid in money. . Payments made by certain foreign organizations. . Payments made to a nominee. . Section 404(k) payments made by an ESOP. Payments of interest not generally subject to backup withholding include the following: . Payments of interest on obligations issued by individuals. Note: You may be subject to backup withholding if this interest is $600 or more and is paid in the course of the payer's trade or business and you have not provided your correct taxpayer identification number to the payer. . Payments of tax-exempt interest (including exempt-interest dividends under Section 852 of the Code). . Payments described in Section 6049(b)(5) of the Code to nonresident aliens. . Payments on tax-free covenant bonds under Section 1451 of the Code. . Payments made by certain foreign organizations. . Payments made to a nominee. . Mortgage interest paid to you. Exempt payees described above should file Form W-9 to avoid possible erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER IDEN- TIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, SIGN AND DATE THE FORM AND RETURN IT TO THE PAYER. IF YOU ARE A NONRESIDENT ALIEN OR A FOREIGN ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH A PAYER A COMPLETED INTER- NAL REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS). Certain payments other than interest, dividends and patronage dividends that are not subject to information reporting are also not subject to backup with- holding. For details, see the regulations under Sections 6041, 6041A(a), 6045, and 6050(A) of the Code and the regulations promulgated thereunder. Privacy Act Notice.--Section 6109 requires most recipients of dividends, in- terest, or other payments to give taxpayer identification numbers to payers who must report the payments to the IRS. The IRS uses the numbers for identi- fication purposes. Payers must be given the numbers whether or not recipients are required to file tax returns. Payers must generally withhold 31% of tax- able interest, dividends, and certain other payments to a payee who does not furnish a taxpayer identification number to a payer. Certain penalties may also apply. Penalties (1) Penalty for Failure to Furnish Taxpayer Identification Number.--If you fail to furnish your taxpayer identification number to a payer, you are sub- ject to a penalty of $50 for each such failure unless your failure is due to reasonable cause and not to willful neglect. (2) Civil Penalty for False Information With Respect to Withholding.--If you make a false statement with no reasonable basis that results in no imposition of backup withholding, you are subject to a penalty of $500. (3) Criminal Penalty for Falsifying Information.-- Wilfully falsifying certi- fications or affirmations may subject you to criminal penalties including fines and/or imprisonment. FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL REVENUE SERVICE.