CROWN CASTLE INTERNATIONAL CORP
8-A12G/A, EX-99.6, 2000-09-19
COMMUNICATIONS SERVICES, NEC
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<PAGE>

                                                                       EXHIBIT 6

                    AMENDED AND RESTATED RIGHTS AGREEMENT dated as of September
               18, 2000 (the "Rights Agreement"), between CROWN CASTLE
               INTERNATIONAL CORP., a Delaware corporation (the "Company"), and
               CHASEMELLON SHAREHOLDER SERVICES, L.L.C., as Rights Agent (the
               "Rights Agent").

          The Board of Directors of the Company has authorized and declared a
dividend of one Right (as hereinafter defined) for each share of Common Stock,
par value $.01 per share, of the Company (the "Common Stock") and each share of
Class A Common Stock, par value $.01 per share, of the Company (the "Class A
Common Stock") outstanding at the Close of Business (as hereinafter defined) on
the date hereof (the "Record Date"), and has authorized the issuance of one
Right (as such number may hereafter be adjusted pursuant to the provisions of
this Rights Agreement) with respect to each Common Share that shall become
outstanding between the Record Date and the earliest of the Distribution Date,
the Redemption Date or the Expiration Date (as such terms are hereinafter
defined); provided, however, that Rights may be issued with respect to Common
          --------  -------
Shares that shall become outstanding after the Distribution Date and prior to
the earlier of the Redemption Date or the Expiration Date in accordance with the
provisions of Section 23.  Each Right shall initially represent the right to
purchase one ten-thousandth (1/10,000th) of a share of Series A Participating
Cumulative Preferred Stock, par value $.01 per share, of the Company (the
"Preferred Shares"), having the powers, rights and preferences set forth in the
Certificate of Designation attached as Exhibit A.

          WHEREAS the parties executed the Rights Agreement on August 21, 1998.

          WHEREAS the parties executed Amendment No. 1 to the Rights Agreement
on March 31, 1999.

          WHEREAS the parties executed Amendment No. 2 to the Rights Agreement
on November 7, 1999.

          WHEREAS the Company, pursuant to the terms of the Rights Agreement and
in accordance with Section 26 thereof, has approved this Amendment No. 3 and
desires to amend and restate the Rights Agreement to effect such amendment
together with all prior amendments.
<PAGE>

                                                                               2

          NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

          SECTION 1.  Certain Definitions.  For purposes of this Rights
                      -------------------
Agreement, the following terms have the meanings indicated:

          "Acquiring Person" shall mean any Person who or which, alone or
           ----------------
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of more than 15% of the Voting Securities then outstanding, but
shall not include (a) the Company, any Subsidiary of the Company, any employee
benefit or compensation plan of the Company or of any of its Subsidiaries, or
any Person holding Voting Securities for or pursuant to the terms of any such
employee benefit or compensation plan and (b) any such Person who has become and
is the Beneficial Owner of more than 15% of the Voting Securities then
outstanding solely as the result of (i) a change in the aggregate number of
Voting Securities outstanding since the last date on which such Person acquired
Beneficial Ownership of any Voting Securities, (ii) the acquisition by such
Person or one or more of its Affiliates or Associates of Beneficial Ownership of
additional Voting Securities if such acquisition was made in the good faith
belief that such acquisition would not (A) cause the Beneficial Ownership by
such Person, together with its Affiliates and Associates, to exceed 15% of the
Voting Securities outstanding at the time of such acquisition and such good
faith belief was based on the good faith reliance on information contained in
publicly filed reports or documents of the Company that are inaccurate or out-
of-date or (B) otherwise cause a Distribution Date or the adjustment provided
for in Section 11(a) to occur, or (iii) the acquisition by such Person or one or
more of its Affiliates or Associates of Beneficial Ownership of additional
Voting Securities if the Board of Directors of the Company determines that such
acquisition was made in good faith without the knowledge by such Person or
Affiliates or Associates that such Person would thereby become an Acquiring
Person, which determination of the Board of Directors of the Company shall be
conclusive and binding on such Person, the Rights Agent, the holders of the
Rights and all other Persons; provided, however, that, for so long as Bell
                              --------
Atlantic or any Affiliate of Bell Atlantic which is controlled by Bell Atlantic
shall not become the Beneficial Owner of any Voting Securities other than
pursuant to the following clauses (x), (y) and (z), none of Bell Atlantic or any
such Affiliate shall be deemed to be an Acquiring Person solely by virtue of (x)
the issuance of the BAM Contributed Shares by the Company and the contribution
thereof by CCA
<PAGE>

                                                                               3

Investment Corp. to Crown Atlantic HoldCo at the closing of the transactions
contemplated by the BAM Formation Agreement and also after such closing in
accordance with the provisions of Section 3.8 of the BAM Formation Agreement, or
(y) the distribution or transfer of the BAM Contributed Shares (including all
changes in the CCA Investment Corp. Contributed Shares by reason of dividends
payable in stock of the Company, distributions, issuances of stock, stock
splits, recapitalizations, reorganizations, mergers, consolidations,
combinations, exchanges or other similar changes with regard to the Common Stock
occurring following the date hereof, and together with all cash, securities (and
rights and interests therein) and other property received or receivable with
respect to the Contributed Shares) to BAM in connection with the dissolution of
Crown Atlantic HoldCo or otherwise, or (z) the payment by CCA Investment Corp.
to BAM, made in Common Stock in connection with the dissolution of Crown
Atlantic HoldCo pursuant to Section 9.5 of the BAM Operating Agreement, of an
amount equal to the Allocated Share (as defined in the BAM Operating Agreement)
of the Fair Market Value (as defined in the BAM Operating Agreement) of the
Crown Atlantic HoldCo Sub membership interest; provided further that for so long
                                               -------- ------- ----
as GTE Wireless or any Affiliate of GTE Wireless shall not become the Beneficial
Owner of any Voting Securities other than pursuant to the following clauses (x),
(y) and (z), none of GTE Wireless or any such Affiliate shall be deemed to be an
Acquiring Person solely by virtue of (x) the issuance of the GT Contributed
Shares by the Company and the contribution thereof by GT Company Member to Crown
Castle GT HoldCo at any closing of the transactions contemplated by the GT
Formation Agreement and also after such closing in accordance with the
provisions of Section 2A.9 of the GT Formation Agreement, or (y) the
distribution or transfer of the GT Contributed Shares (including all changes in
the GT Contributed Shares by reason of dividends payable in stock of the
Company, distributions, issuances of stock, stock splits, recapitalizations,
reorganizations, mergers, consolidations, combinations, exchanges or other
similar changes with regard to the Common Stock occurring following the date
hereof, and together with all cash, securities (and rights and interests
therein) and other property received or receivable with respect to the GT
Contributed Shares) to GTE Wireless in connection with the dissolution of Crown
Castle GT HoldCo or otherwise, or (z) the payment by GT Company Member to GTE
Wireless, made in Common Stock in connection with the dissolution of Crown
Castle GT HoldCo pursuant to Section 9.5 of the GT HoldCo Operating Agreement,
of an amount equal to the Allocated Share (as defined in the GT HoldCo Operating
Agreement) of the Fair Market Value (as defined in the GT HoldCo Operating
Agreement) of the Crown
<PAGE>

                                                                               4

Castle GT HoldCo Sub membership interest. Notwithstanding clause (b)(ii) or
(b)(iii) of the prior sentence, if any Person that is not an Acquiring Person
solely by reason of such clause (b)(ii) or (b)(iii) does not reduce its
percentage of Beneficial Ownership of Voting Securities to 15% or less by the
Close of Business on the tenth calendar day after notice from the Company (the
date of notice being the first day) that such Person's Beneficial Ownership of
Voting Securities would make it an Acquiring Person, such Person shall, at the
end of such ten calendar day period, become an Acquiring Person (and such clause
(b)(ii) or (b)(iii) shall no longer apply to such Person). For purposes of this
definition, the determination whether any Person acted in "good faith" shall be
conclusively determined by the Board of Directors of the Company.

          "Affiliate" and "Associate", when used with reference to any Person,
           ---------       ---------
shall have the respective meanings ascribed to such terms in Rule 12b-2 of the
General Rules and Regulations under the Exchange Act, as in effect on the date
of this Rights Agreement.

          "BAM" shall mean Cellco Partnership, a Delaware general partnership
           ---
doing business as Bell Atlantic Mobile.

          "BAM Contributed Shares" shall mean the Bidder Contributed Shares, as
           ----------------------
such term is defined in the BAM Formation Agreement.

          "BAM Formation Agreement" shall mean the Formation Agreement dated as
           -----------------------
of December 8, 1998 among the Company, CCA Investment Corp., BAM, and certain
transferring partnerships, as amended on March 31, 1999.

          "BAM Operating Agreement" shall mean the Operating Agreement of Crown
           -----------------------
Atlantic HoldCo entered into as of March 31, 1999.

          "Bell Atlantic" shall mean Bell Atlantic Corporation, a Delaware
           -------------
corporation.

          A Person shall be deemed the "Beneficial Owner" of, and shall be
                                        ----------------
deemed to "beneficially own", and shall be deemed to have "Beneficial Ownership"
           ----------------                                --------------------
of, any securities:

          (a) which such Person or any of such Person's Affiliates or Associates
     is deemed to "beneficially own" within the meaning of Rule 13d-3 of the
     General Rules and Regulations under the Exchange Act, as in effect on the
     date of this Rights Agreement;
<PAGE>

                                                                               5

          (b) which such Person or any of such Person's Affiliates or Associates
     has: (i) the right to acquire (whether such right is exercisable
     immediately or only after the passage of time) pursuant to any agreement,
     arrangement or understanding (written or oral), or upon the exercise of
     conversion rights, exchange rights, rights (other than the Rights),
     warrants or options, or otherwise; provided, however, that a Person shall
                                        --------  -------
     not be deemed under clause (i) to be the Beneficial Owner of, or to
     beneficially own, or to have Beneficial Ownership of, any securities
     tendered pursuant to a tender or exchange offer made by or on behalf of
     such Person or any of such Person's Affiliates or Associates until such
     tendered securities are accepted for purchase or exchange thereunder or
     cease to be subject to withdrawal by the tendering security holder; or (ii)
     the right to vote pursuant to any agreement, arrangement or understanding
     (written or oral); provided, however, that a Person shall not be deemed
                        --------  -------
     under this clause (ii) to be the Beneficial Owner of, or to beneficially
     own, or to have Beneficial Ownership of, any security if (A) the agreement,
     arrangement or understanding (written or oral) to vote such security arises
     solely from a revocable proxy or consent given to such Person in response
     to a public proxy or consent solicitation made generally to all holders of
     Common Shares of the Company pursuant to, and in accordance with, the
     applicable rules and regulations under the Exchange Act and (B) the
     beneficial ownership of such security is not also then reportable on
     Schedule 13D under the Exchange Act (or any comparable or successor
     report); or

          (c) which are beneficially owned, directly or indirectly, by any other
     Person with which such Person or any of such Person's Affiliates or
     Associates has any agreement, arrangement or understanding (written or
     oral) for the purpose of acquiring, holding, voting (except pursuant to a
     revocable proxy as described in the proviso to clause (b)(ii) of this
     definition) or disposing of any securities of the Company.

Notwithstanding the foregoing, nothing contained in this definition shall cause
a Person ordinarily engaged in business as an underwriter of securities to be
deemed the "Beneficial Owner" of, or to "beneficially own", or to have
"Beneficial Ownership" of, any securities acquired in a bona fide firm
commitment underwriting pursuant to an underwriting agreement with the Company.
<PAGE>

                                                                               6

          "Book Value", when used with reference to Common Shares issued by any
           ----------
Person, shall mean the amount of equity of such Person applicable to each Common
Share, determined (a) in accordance with generally accepted accounting
principles in effect on the date as of which such Book Value is to be
determined, (b) using all the consolidated assets and all the consolidated
liabilities of such Person on the date as of which such Book Value is to be
determined, except that no value shall be included in such assets for goodwill
arising from consummation of a business combination, and (c) after giving effect
to (i) the exercise of all rights, options and warrants to purchase such Common
Shares (other than, in the case of the Company, the Rights), and the conversion
of all securities convertible into such Common Shares, at an exercise or
conversion price, per Common Share, which is less than such Book Value before
giving effect to such exercise or conversion (whether or not exercisability or
convertibility is conditioned upon occurrence of a future event), (ii) all
dividends and other distributions on the capital stock of such Person declared
prior to the date as of which such Book Value is to be determined and to be paid
or made after such date, and (iii) any other agreement, arrangement or
understanding (written or oral), or transaction or other action contemplated
prior to the date as of which such Book Value is to be determined that would
have the effect of thereafter reducing such Book Value.

          "Business Combination" shall have the meaning set forth in Section
           --------------------
11(c)(i).

          "Business Day" shall mean each Monday, Tuesday, Wednesday, Thursday
           ------------
and Friday that is not a day on which banking institutions in the Borough of
Manhattan, the City of New York, are authorized or obligated by law or executive
order to close.

          "CCA Investment Corp." shall mean CCA Investment Corp., a Delaware
           --------------------
corporation and a wholly owned subsidiary of the Company.

          "Certificate of Designation" shall mean the Certificate of Designation
           --------------------------
of Series A Participating Cumulative Preferred Stock setting forth the powers,
preferences, rights, qualifications, limitations and restrictions of such series
of Preferred Stock of the Company, a copy of which is attached as Exhibit A.

          "Class A Common Stock" shall have the meaning set forth in the
           --------------------
introductory paragraph of this Rights Agreement.
<PAGE>

                                                                               7

          "Close of Business" on any given date shall mean 5:00 p.m., Eastern
           -----------------
time, on such date; provided, however, that, if such date is not a Business Day,
                    --------  -------
"Close of Business" shall mean 5:00 p.m., Eastern time, on the next succeeding
Business Day.

          "Common Shares", when used with reference to the Company prior to a
           -------------
Business Combination, shall mean the shares of Common Stock and Class A Common
Stock of the Company or any other shares of capital stock of the Company into
which the Common Stock or Class A Common Stock shall be reclassified or changed.
"Common Shares", when used with reference to any Person (other than the Company
prior to a Business Combination), shall mean shares of capital stock of such
Person (if such Person is a corporation) of any class or series, or units of
equity interests in such Person (if such Person is not a corporation) of any
class or series, the terms of which do not limit (as a maximum amount and not
merely in proportional terms) the amount of dividends or income payable or
distributable on such class or series or the amount of assets distributable on
such class or series upon any voluntary or involuntary liquidation, dissolution
or winding up of such Person and do not provide that such class or series is
subject to redemption at the option of such Person, or any shares of capital
stock or units of equity interests into which the foregoing shall be
reclassified or changed.

          "Common Stock" shall have the meaning set forth in the introductory
           ------------
paragraph of this Rights Agreement.

          "Company" shall have the meaning set forth in the heading of this
           -------
Rights Agreement; provided, however, that if there is a Business Combination,
                  --------  -------
"Company" shall have the meaning set forth in Section 11(c)(iii).

          The term "control" with respect to any Person shall mean the power to
                    -------
direct the management and policies of such Person, directly or indirectly, by or
through stock ownership, agency or otherwise, or pursuant to or in connection
with an agreement, arrangement or understanding (written or oral) with one or
more other Persons by or through stock ownership, agency or otherwise; and the
terms "controlling" and "controlled" shall have meanings correlative to the
foregoing.

          "Crown Atlantic HoldCo" shall mean Crown Atlantic Holding Company LLC,
           ---------------------
a Delaware limited liability company.
<PAGE>

                                                                               8

          "Crown Atlantic HoldCo Sub" shall mean Crown Atlantic Holding Sub LLC,
           -------------------------
a Delaware limited liability company.

          "Crown Castle GT Corp." shall mean Crown Castle GT Corp., a Delaware
           ---------------------
corporation and a wholly owned subsidiary of the Company.

          "Crown Castle GT HoldCo" shall mean Crown Castle GT Holding Company
           ----------------------
LLC, a Delaware limited liability company.

          "Crown Castle GT HoldCo Sub" shall mean Crown Castle GT Holding Sub
           --------------------------
LLC, a Delaware limited liability company.

          "Distribution Date" shall have the meaning set forth in Section 3(b).
           -----------------

          "Exchange Act" shall mean the Securities Exchange Act of 1934, as
           ------------
amended, as in effect on the date in question, unless otherwise specifically
provided.

          "Exchange Consideration" shall have the meaning set forth in Section
           ----------------------
11(b)(i).

          "Expiration Date" shall have the meaning set forth in Section 7(a).
           ---------------

          "GT Contributed Shares" shall have the meaning assigned to the term
           ---------------------
"Contributed Shares" in the GT Formation Agreement.

          "GT Formation Agreement" shall mean the Formation Agreement dated as
           ----------------------
of November 7, 1999 among the Company, GT Company Member, GTE Wireless and
certain transferring entities.

          "GT HoldCo Operating Agreement" shall have the meaning assigned to the
           -----------------------------
term "HoldCo Operating Agreement" in the GT Formation Agreement.

          "GTE Wireless" shall mean GTE Wireless Incorporated, a Delaware
           ------------
corporation.

          "Major Part", when used with reference to the assets of the Company
           ----------
and its Subsidiaries as of any date, shall mean assets (a) having a fair market
value aggregating 50% or more of the total fair market value of all the assets
of the Company and its Subsidiaries (taken as a whole) as of the date in
question, (b) accounting for 50% or more of the
<PAGE>

                                                                               9

total value (net of depreciation and amortization) of all the assets of the
Company and its Subsidiaries (taken as a whole) as would be shown on a
consolidated or combined balance sheet of the Company and its Subsidiaries as of
the date in question, prepared in accordance with generally accepted accounting
principles then in effect, or (c) accounting for 50% or more of the total amount
of earnings before interest, taxes, depreciation and amortization or of the
revenues of the Company and its Subsidiaries (taken as a whole) as would be
shown on, or derived from, a consolidated or combined statement of income or net
earnings of the Company and its Subsidiaries for the period of 12 months ending
on the last day of the Company's monthly accounting period next preceding the
date in question, prepared in accordance with generally accepted accounting
principles then in effect.

          "Market Value", when used with reference to the Company, shall mean
           ------------
the average of the daily closing prices, per share, of the Common Stock for the
period which is the shorter of (a) 30 consecutive Trading Days ending on the
Trading Day immediately prior to the date in question or (b) the number of
consecutive Trading Days beginning on the Trading Day immediately after the date
of the first public announcement of the event requiring a determination of the
Market Value of Common Stock and ending on the Trading Day immediately prior to
the record date of such event; provided, however, that, in the event that the
                               --------  -------
Market Value of such Common Stock is to be determined in whole or in part during
a period following the announcement by the issuer of such Common Stock of any
action of the type described in Section 12(a) that would require an adjustment
thereunder, then, and in each such case, the Market Value of such Common Stock
shall be appropriately adjusted to reflect the effect of such action on the
market price of such Common Stock, and "Market Value", when used with reference
to any Person other than the Company, shall mean the Common Shares of such
Person on any date and each of the foregoing references to "Common Stock" shall,
when used with reference to such Person, be deemed to be a reference to the
Common Shares of such Person.  The closing price for each Trading Day shall be
the closing price quoted on the composite tape for securities listed on the New
York Stock Exchange, or, if such securities are not quoted on such composite
tape or if such securities are not listed on such exchange, on the principal
United States securities exchange registered under the Exchange Act (or any
recognized foreign stock exchange) on which such securities are listed, or, if
such securities are not listed on any such exchange, the closing price quoted on
The Nasdaq Stock Market or, if such securities are not so quoted, the average of
the closing bid and asked
<PAGE>

                                                                              10

quotations with respect to a share of such securities on any National
Association of Securities Dealers, Inc. quotations system or such other system
then in use, or if no such quotations are available, the average of the closing
bid and asked prices as furnished by a professional market maker making a market
in such securities selected by the Board of Directors of the Company, or if on
any such Trading Day no market maker is making a market in such securities, the
closing price of such securities on such Trading Day shall be deemed to be the
fair value of such securities as determined in good faith by the Board of
Directors of the Company (whose determination shall be described in a statement
filed with the Rights Agent and shall be binding on the Rights Agent, the
holders of Rights and all other Persons); provided, however, that for the
                                          --------  -------
purpose of determining the closing price of the Preferred Shares for any Trading
Day on which there is no such market maker for the Preferred Shares the closing
price on such Trading Day shall be deemed to be the Formula Number (as defined
in the Certificate of Designation) multiplied by the closing price per share of
the Common Stock of the Company on such Trading Day.

          "Person" shall mean an individual, corporation, partnership, limited
           ------
liability company, joint venture, association, trust, unincorporated
organization or other entity.

          "Preferred Shares" shall have the meaning set forth in the
           ----------------
introductory paragraph of this Rights Agreement.  Any reference in this Rights
Agreement to Preferred Shares shall be deemed to include any authorized fraction
of a Preferred Share, unless the context otherwise requires.

          "Principal Party" shall mean the Surviving Person in a Business
           ---------------
Combination; provided, however, that, (i) if such Surviving Person is a direct
             --------  -------
or indirect Subsidiary of any other Person, "Principal Party" shall mean the
Person which is the ultimate parent of such Surviving Person and which is not
itself a Subsidiary of another Person, and (ii) in the event ultimate control of
such Surviving Person is shared by two or more Persons, "Principal Party" shall
mean that Person that is immediately controlled by such two or more Persons.

          "Purchase Price" with respect to each Right shall mean $110, as such
           --------------
amount may from time to time be adjusted as provided herein, and shall be
payable in lawful money of the United States of America.  All references herein
to the
<PAGE>

                                                                              11

Purchase Price shall mean the Purchase Price as in effect at the time in
question.

          "Record Date" shall have the meaning set forth in the introductory
           -----------
paragraph of this Rights Agreement.

          "Redemption Date" shall have the meaning set forth in Section 24(a).
           ---------------

          "Redemption Price" with respect to each Right shall mean $.01, as such
           ----------------
amount may from time to time be adjusted in accordance with Section 12.  All
references herein to the Redemption Price shall mean the Redemption Price as in
effect at the time in question.

          "Registered Common Shares" shall mean Common Shares that are, as of
           ------------------------
the date of consummation of a Business Combination, and have continuously been
for the 12 months immediately preceding such date, registered under Section 12
of the Exchange Act.

          "Right Certificate" shall mean a certificate evidencing a Right in
           -----------------
substantially the form attached as Exhibit B.

          "Rights" shall mean the rights to purchase Preferred Shares (or other
           ------
securities) as provided in this Rights Agreement.

          "Securities Act" shall mean the Securities Act of 1933, as amended, as
           --------------
in effect on the date in question, unless otherwise specifically provided.

          "Senior Preferred Stock" shall mean the Senior Convertible Preferred
           ----------------------
Stock of the Company, par value $.01 per share.

          "Subsidiary" shall mean a Person, at least a majority of the total
           ----------
outstanding voting power (being the power under ordinary circumstances (and not
merely upon the happening of a contingency) to vote in the election of directors
of such Person (if such Person is a corporation) or to participate in the
management and control of such Person (if such Person is not a corporation)) of
which is owned, directly or indirectly, by another Person or by one or more
other Subsidiaries of such other Person or by such other Person and one or more
other Subsidiaries of such other Person.

          "Surviving Person" shall mean (a) the Person which is the continuing
           ----------------
or surviving Person in a consolidation or
<PAGE>

                                                                              12

merger specified in Section 11(c)(i)(A) or 11(c)(i)(B) or (b) the Person to
which the Major Part of the assets of the Company and its Subsidiaries is sold,
leased, exchanged or otherwise transferred or disposed of in a transaction
specified in Section 11(c)(i)(C); provided, however, that, if the Major Part of
                                  --------  -------
the assets of the Company and its Subsidiaries is sold, leased, exchanged or
otherwise transferred or disposed of in one or more related transactions
specified in Section 11(c)(i)(C) to more than one Person, the "Surviving Person"
in such case shall mean the Person that acquired assets of the Company and/or
its Subsidiaries with the greatest fair market value in such transaction or
transactions.

          "Trading Day" shall mean a day on which the principal national
           -----------
securities exchange (or principal recognized foreign stock exchange, as the case
may be) on which any securities or Rights, as the case may be, are listed or
admitted to trading is open for the transaction of business or, if the
securities or Rights in question are not listed or admitted to trading on any
national securities exchange (or recognized foreign stock exchange, as the case
may be), a Business Day.

          "Voting Power", when used with reference to any class or series of
           ------------
securities of the Company, or any classes or series of securities of the Company
entitled to vote together as a single class or series, shall mean the power of
such class or series (or such classes or series) to vote for the election of
directors.  For purposes of determining the percentage of Voting Power of any
class or series (or classes or series) beneficially owned by any person, any
securities not outstanding which are subject to conversion rights, exchange
rights, rights, warrants, options or similar securities held by such person
shall be deemed to be outstanding for the purpose of computing the percentage of
outstanding securities of the class or series (or classes or series)
beneficially owned by such person, but shall not be deemed to be outstanding for
the purpose of computing the percentage of the class or series (or classes or
series) beneficially owned by any other person.

          "Voting Securities", when used with reference to the Company shall
           -----------------
mean any securities of the Company having Voting Power or any securities
convertible into or exchangeable for any securities having Voting Power,
including but not limited to the Common Stock, the Class A Common Stock and the
Senior Preferred Stock.

          SECTION 2.  Appointment of Rights Agent.  The Company hereby appoints
                      ---------------------------
the Rights Agent to act as agent for
<PAGE>

                                                                              13

the Company in accordance with the terms and conditions hereof, and the Rights
Agent hereby accepts such appointment. The Company may from time to time appoint
one or more co-Rights Agents as it may deem necessary or desirable (the term
"Rights Agent" being used herein to refer, collectively, to the Rights Agent
together with any such co-Rights Agents). In the event the Company appoints one
or more co-Rights Agents, the respective duties of the Rights Agent and any co-
Rights Agents shall be as the Company shall determine.

          SECTION 3.  Issue of Rights and Right Certificates.  (a)  One Right
                      --------------------------------------
shall be associated with each Common Share outstanding on the Record Date, each
additional Common Share that shall become outstanding between the Record Date
and the earliest of the Distribution Date, the Redemption Date or the Expiration
Date and each additional Common Share with which Rights are issued after the
Distribution Date but prior to the earlier of the Redemption Date or the
Expiration Date as provided in Section 23; provided, however, that, if the
                                           --------  -------
number of outstanding Rights are combined into a smaller number of outstanding
Rights pursuant to Section 12(a), the appropriate fractional Right determined
pursuant to such Section shall thereafter be associated with each such Common
Share.

          (b)  Until the earlier of (i) such time as the Company learns that a
Person has become an Acquiring Person or (ii) the Close of Business on such
date, if any, as may be designated by the Board of Directors of the Company
following the commencement of, or first public disclosure of an intent to
commence, a tender or exchange offer by any Person (other than the Company, any
Subsidiary of the Company, any employee benefit or compensation plan of the
Company or of any of its Subsidiaries, or any Person holding Voting Securities
for or pursuant to the terms of any such employee benefit or compensation plan)
for outstanding Voting Securities, if upon consummation of such tender or
exchange offer such Person could be the Beneficial Owner of more than 15% of the
outstanding Voting Securities, (the Close of Business on the earlier of such
dates being the "Distribution Date"), (x) the Rights shall be evidenced by the
certificates for Common Shares registered in the names of the holders thereof
and not by separate Right Certificates, (y) the Rights, including the right to
receive Right Certificates, shall be transferable only in connection with the
transfer of Common Shares and (z) the Company shall notify the Rights Agent as
promptly as practicable that the Distribution Date has occurred.  As soon as
practicable after the Distribution Date, the Rights Agent shall send, by first-
class, postage-prepaid mail, to each record holder of
<PAGE>

                                                                              14

Common Shares as of the Distribution Date, at the address of such holder shown
on the records of the Company, a Right Certificate evidencing one whole Right
for each Common Share (or for the number of Common Shares with which one whole
Right is then associated if the number of Rights per Common Share held by such
record holder has been adjusted in accordance with the proviso in Section 3(a)).
If the number of Rights associated with each Common Share has been adjusted in
accordance with the proviso in Section 3(a), at the time of distribution of the
Right Certificates the Company may make any necessary and appropriate rounding
adjustments so that Right Certificates representing only whole numbers of Rights
are distributed and cash is paid in lieu of any fractional Right in accordance
with Section 15(a). The Company shall notify the Rights Agent as promptly as
practicable of any such adjustments. As of and after the Distribution Date, the
Rights shall be evidenced solely by such Right Certificates.

          (c)  With respect to any certificate for Common Shares outstanding as
of the Record Date, until the earliest of the Distribution Date, the Redemption
Date or the Expiration Date, (i) the Rights associated with the Common Shares
represented by any such certificate shall be evidenced by such certificates for
the Common Shares and the registered holders of the Common Shares shall also be
the registered holders of the associated Rights and (ii) the surrender for
transfer of any such certificate, shall also constitute the transfer of the
Rights associated with the Common Shares represented thereby; provided, however,
                                                              --------  -------
that the Rights associated with shares of Class A Common Stock shall be deemed
null and void upon surrender of any certificate representing Class A Common
Stock for conversion into shares of Common Stock or upon an automatic conversion
of the Class A Common Stock into Common Stock pursuant to the terms of such
Class A Common Stock (it being understood that any Common Stock issued upon any
conversion of Class A Common Stock shall be issued with the associated Rights).

          (d)  Certificates issued for Common Shares after the Record Date
(including upon transfer or exchange of outstanding Common Shares), but prior to
the earliest of the Distribution Date, the Redemption Date or the Expiration
Date, shall have printed  on, written on or otherwise affixed to them the
following legend:

          This certificate also evidences and entitles the holder hereof to
     certain Rights as set forth in a Rights Agreement dated as of August 21,
     1998 as it may be amended from time to time (the "Rights Agreement"),
     between Crown Castle International Corp. (the
<PAGE>

                                                                              15

     "Company") and ChaseMellon Shareholder Services, L.L.C., as Rights Agent
     (the "Rights Agent"), the terms of which are hereby incorporated herein by
     reference and a copy of which is on file at the principal executive offices
     of the Company. Under certain circumstances, as set forth in the Rights
     Agreement, such Rights shall be evidenced by separate certificates and
     shall no longer be evidenced by this certificate. The Rights Agent shall
     mail to the holder of this certificate a copy of the Rights Agreement
     without charge after receipt of a written request therefor. Rights
     beneficially owned by Acquiring Persons or their Affiliates or Associates
     (as such terms are defined in the Rights Agreement) and by any subsequent
     holder of such Rights are null and void and nontransferable.

Notwithstanding this Section 3(d), neither the omission of a legend nor the
inclusion of a legend that makes reference to a rights agreement other than the
Rights Agreement shall affect the enforceability of any part of this Rights
Agreement or the rights of any holder of Rights.

          SECTION 4.  Form of Right Certificates.  The Right Certificates (and
                      --------------------------
the form of election to purchase and form of assignment to be printed on the
reverse side thereof) shall be in substantially the form set forth as Exhibit B
and may have such marks of identification or designation and such legends,
summaries or endorsements printed thereon as the Company may deem appropriate
and as are not inconsistent with the provisions of this Rights Agreement, or as
may be required to comply with any applicable law or with any rule or regulation
made pursuant thereto or with any rule or regulation of any stock exchange on
which the Rights may from time to time be listed, or to conform to usage.
Subject to the provisions of Sections 7, 11 and 23, the Right Certificates,
whenever issued, shall be dated as of the Distribution Date, and on their face
shall entitle the holders thereof to purchase such number of Preferred Shares as
shall be set forth therein for the Purchase Price set forth therein, subject to
adjustment from time to time as herein provided.

          SECTION 5.  Execution, Countersignature and Registration.  (a)  The
                      --------------------------------------------
Right Certificates shall be executed on behalf of the Company by the Chairman of
the Board, the Chief Executive Officer, the President, the Chief Financial
Officer, a Vice President (whether preceded by any additional title), the
Treasurer or the Secretary of the Company, either manually or by facsimile
signature, and have affixed thereto the Company's seal or a facsimile thereof,
which shall be attested by the Secretary, an Assistant
<PAGE>

                                                                              16

Secretary or a Vice President (whether preceded by any additional title,
provided that such Vice President shall not have also executed the Right
Certificates) of the Company, either manually or by facsimile signature. The
Right Certificates shall be manually countersigned by the Rights Agent and shall
not be valid or obligatory for any purpose unless so countersigned. In case any
officer of the Company who shall have signed any of the Right Certificates shall
cease to be such an officer of the Company before countersignature by the Rights
Agent and issuance and delivery by the Company, such Right Certificates may
nevertheless be countersigned by the Rights Agent and issued and delivered by
the Company with the same force and effect as though the person who signed such
Right Certificates had not ceased to be such an officer of the Company; and any
Right Certificate may be signed on behalf of the Company by any person who, at
the actual date of execution of such Right Certificate, shall be a proper
officer of the Company to sign such Right Certificate, although at the date of
execution of this Rights Agreement any such person was not such an officer of
the Company.

          (b)  Following the Distribution Date, the Rights Agent shall keep or
cause to be kept, at its principal office in New Jersey, books for registration
and transfer of the Right Certificates issued hereunder.  Such books shall show
the names and addresses of the respective holders of the Right Certificates, the
number of Rights evidenced by each of the Right Certificates, the certificate
number of each of the Right Certificates and the date of each of the Right
Certificates.

          SECTION 6.  Transfer, Split-Up, Combination and Exchange of Right
                      -----------------------------------------------------
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates;
----------------------------------------------------------------------
Uncertificated Rights. (a)  Subject to the provisions of Sections 7(e) and 15,
---------------------
at any time after the Distribution Date, and at or prior to the Close of
Business on the earlier of the Redemption Date or the Expiration Date, any Right
Certificate or Right Certificates may be transferred, split-up, combined or
exchanged for another Right Certificate or Right Certificates representing, in
the aggregate, the same number of Rights as the Right Certificate or Right
Certificates surrendered then represented.  Any registered holder desiring to
transfer, split-up, combine or exchange any Right Certificate shall make such
request in writing delivered to the Rights Agent and shall surrender the Right
Certificate or Right Certificates to be transferred, split-up, combined or
exchanged at the principal office of the Rights Agent; provided, however, that
                                                       --------  -------
neither the Rights Agent nor the Company shall be obligated to take any action
<PAGE>

                                                                              17

whatsoever with respect to the transfer of any Right Certificate surrendered for
transfer until the registered holder shall have completed and signed the
certification contained in the form of assignment on the reverse side of such
Right Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company or the Rights Agent shall reasonably request.
Thereupon the Rights Agent shall, subject to Sections 7(e) and 15, countersign
and deliver to the Person entitled thereto a Right Certificate or Right
Certificates, as the case may be, as so requested.  The Company may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split-up, combination or exchange of
Right Certificates.

          (b)  Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a valid Right Certificate, and, in case of loss, theft or destruction, of
indemnity or security reasonably satisfactory to them, and, at the Company's
request, reimbursement to the Company and the Rights Agent of all reasonable
expenses incidental thereto, and upon surrender to the Rights Agent and
cancelation of the Right Certificate if mutilated, the Company shall make a new
Right Certificate of like tenor and deliver such new Right Certificate to the
Rights Agent for delivery to the registered owner in lieu of the Right
Certificate so lost, stolen, destroyed or mutilated.

          (c)  Notwithstanding any other provision hereof, the Company and the
Rights Agent may amend this Rights Agreement to provide for uncertificated
Rights in addition to or in place of Rights evidenced by Right Certificates.

          SECTION 7.  Exercise of Rights; Expiration Date of Rights.  (a)
                      ---------------------------------------------
Subject to Section 7(e) and except as otherwise provided herein (including
Section 11), each Right shall entitle the registered holder thereof, upon
exercise thereof as provided herein, to purchase for the Purchase Price, at any
time after the Distribution Date and at or prior to the earliest of (i) the
Close of Business on the 10th anniversary of the date of this Rights Agreement
(the Close of Business on such date being the "Expiration Date") and (ii) the
Redemption Date, one ten-thousandth (1/10,000th) of a Preferred Share, subject
to adjustment from time to time as provided in Sections 11 and 12.

          (b)  The registered holder of any Right Certificate may exercise the
Rights evidenced thereby
<PAGE>

                                                                              18

(except as otherwise provided herein) in whole or in part at any time after the
Distribution Date, upon surrender of the Right Certificate, with the form of
election to purchase on the reverse side thereof duly executed, to the Rights
Agent at the principal office of the Rights Agent in New Jersey, together with
payment of the Purchase Price for each one ten-thousandth (1/10,000th) of a
Preferred Share as to which the Rights are exercised, at or prior to the earlier
of (i) the Expiration Date or (ii) the Redemption Date.

          (c)  Upon receipt of a Right Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the Preferred Shares to be purchased together
with an amount equal to any applicable transfer tax, in lawful money of the
United States of America, in cash or by certified check or money order payable
to the order of the Company, the Rights Agent shall thereupon (i) either (A)
promptly requisition from any transfer agent of the Preferred Shares (or make
available, if the Rights Agent is the transfer agent) certificates for the
number of Preferred Shares to be purchased and the Company hereby irrevocably
authorizes its transfer agent to comply with all such requests or (B) if the
Company shall have elected to deposit the Preferred Shares with a depositary
agent under a depositary arrangement, promptly requisition from the depositary
agent depositary receipts representing the number of one ten-thousandths
(1/10,000s) of a Preferred Share to be purchased (in which case certificates for
the Preferred Shares to be represented by such receipts shall be deposited by
the transfer agent with the depositary agent) and the Company shall direct the
depositary agent to comply with all such requests, (ii) when appropriate,
promptly requisition from the Company the amount of cash to be paid in lieu of
issuance of fractional shares in accordance with Section 15, (iii) promptly
after receipt of such certificates or depositary receipts, cause the same to be
delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder and (iv) when appropriate, after receipt promptly deliver such cash to or
upon the order of the registered holder of such Right Certificate.

          (d)  In case the registered holder of any Right Certificate shall
exercise fewer than all the Rights evidenced thereby, a new Right Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the Rights Agent and delivered to the registered holder of such Right
Certificate or to his duly authorized assigns, subject to the provisions of
Section 15.
<PAGE>

                                                                              19

          (e)  Notwithstanding anything in this Rights Agreement to the
contrary, any Rights that are at any time beneficially owned by (i) an Acquiring
Person or an Affiliate or Associate of an Acquiring Person, (ii) a transferee of
an Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such (other than pursuant to the
penultimate sentence of the definition of "Acquiring Person"), or (iii) a
transferee of an Acquiring Person (or of any such Associate or Affiliate) who
becomes a transferee prior to or concurrently with the Acquiring Person becoming
such and receives such Rights pursuant to either (A) a transfer (whether or not
for consideration) from the Acquiring Person to holders of equity interests in
such Acquiring Person or to any Person with whom the Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of a plan, arrangement or understanding which has as a
primary purpose or effect the avoidance of this Section 7(e), shall become null
and void without any further action and no holder of such Rights shall have any
rights whatsoever with respect to such Rights, whether under any provision of
this Rights Agreement or otherwise.  The Company shall use all reasonable
efforts to ensure that the provisions of this Section 7(e) are complied with,
but shall have no liability to any holder of any Right Certificate or any other
Person as a result of its failure to make any determinations with respect to an
Acquiring Person or its Affiliate or Associate, or any transferee thereof,
hereunder.

          (f)  Notwithstanding anything in this Rights Agreement to the
contrary, neither the Rights Agent nor the Company shall be obligated to
undertake any action with respect to a registered holder of any Right
Certificates upon the occurrence of any purported exercise as set forth in this
Section 7 unless such registered holder shall have (i) completed and signed the
certificate contained in the form of election to purchase set forth on the
reverse side of the Right Certificate surrendered for such exercise and (ii)
provided such additional evidence of the identity of the Beneficial Owner (or
former Beneficial Owner) or Affiliates or Associates thereof as the Company
shall reasonably request.

          (g)  The Company may temporarily suspend, for a period of time not to
exceed 90 calendar days after the Distribution Date, the exercisability of the
Rights in order to prepare and file a registration statement under the
Securities Act, on an appropriate form, with respect to the Preferred Shares
purchasable upon exercise of the Rights and
<PAGE>

                                                                              20

permit such registration statement to become effective; provided, however, that
                                                        --------  -------
no such suspension shall remain effective after, and the Rights shall without
any further action by the Company or any other Person become exercisable
immediately upon, the effectiveness of such registration statement. Upon any
such suspension, the Company shall issue a public announcement stating that the
exercisability of the Rights has been temporarily suspended and shall issue a
further public announcement at such time as the suspension is no longer in
effect. Notwithstanding any provision herein to the contrary, the Rights shall
not be exercisable in any jurisdiction if the requisite qualification under the
blue sky or securities laws of such jurisdiction shall not have been obtained or
the exercise of the Rights shall not be permitted under applicable law.

          SECTION 8.  Cancelation and Destruction of Right Certificates.  All
                      -------------------------------------------------
Right Certificates surrendered or presented for the purpose of exercise,
transfer, split-up, combination or exchange shall, and any Right Certificate
representing Rights that have become null and void and nontransferable pursuant
to Section 7(e) surrendered or presented for any purpose shall, if surrendered
or presented to the Company or to any of its agents, be delivered to the Rights
Agent for cancelation or in canceled form, or, if surrendered or presented to
the Rights Agent, shall be canceled by it, and no Right Certificates shall be
issued in lieu thereof except as expressly permitted by this Rights Agreement.
The Company shall deliver to the Rights Agent for cancelation and retirement,
and the Rights Agent shall so cancel and retire, any Right Certificate purchased
or acquired by the Company.  The Rights Agent shall deliver all canceled Right
Certificates to the Company, or shall, at the written request of the Company,
destroy such canceled Right Certificates, and in such case shall deliver a
certificate of destruction thereof to the Company.

          SECTION 9.  Reservation and Availability of Preferred Shares.  (a)
                      ------------------------------------------------
The Company covenants and agrees that it shall cause to be reserved and kept
available out of its authorized and unissued Preferred Shares or any authorized
and issued Preferred Shares held in its treasury, free from preemptive rights or
any right of first refusal, a number of Preferred Shares sufficient to permit
the exercise in full of all outstanding Rights.

          (b)  In the event that there shall not be sufficient Preferred Shares
issued but not outstanding or authorized but unissued to permit the exercise or
exchange of Rights in accordance with Section 11, the Company covenants and
agrees that it shall take all such action as
<PAGE>

                                                                              21

may be necessary to authorize additional Preferred Shares for issuance upon the
exercise or exchange of Rights pursuant to Section 11; provided, however, that
                                                       --------  -------
if the Company is unable to cause the authorization of additional Preferred
Shares, then the Company shall, or in lieu of seeking any such authorization,
the Company may, to the extent necessary and permitted by applicable law and any
agreements or instruments in effect prior to the Distribution Date to which it
is a party, (i) upon surrender of a Right, pay cash equal to the Purchase Price
in lieu of issuing Preferred Shares and requiring payment therefor, (ii) upon
due exercise of a Right and payment of the Purchase Price for each Preferred
Share as to which such Right is exercised, issue equity securities having a
value equal to the value of the Preferred Shares that otherwise would have been
issuable pursuant to Section 11, which value shall be determined by a nationally
recognized investment banking firm selected by the Board of Directors of the
Company, or (iii) upon due exercise of a Right and payment of the Purchase Price
for each Preferred Share as to which such Right is exercised, distribute a
combination of Preferred Shares, cash and/or other equity and/or debt securities
having an aggregate value equal to the value of the Preferred Shares that
otherwise would have been issuable pursuant to Section 11, which value shall be
determined by a nationally recognized investment banking firm selected by the
Board of Directors of the Company. To the extent that any legal or contractual
restrictions (pursuant to agreements or instruments in effect prior to the
Distribution Date to which it is party) prevent the Company from paying the full
amount payable in accordance with the foregoing sentence, the Company shall pay
to holders of the Rights as to which such payments are being made all amounts
that are not then restricted on a pro rata basis as such payments become
permissible under such legal or contractual restrictions until such payments
have been paid in full.

          (c)  The Company covenants and agrees that it shall take all such
action as may be necessary to ensure that all Preferred Shares delivered upon
exercise or exchange of Rights shall, at the time of delivery of the
certificates for such Preferred Shares (subject to payment of the Purchase
Price), be duly and validly authorized and issued and fully paid and
nonassessable shares.

          (d)  So long as the Preferred Shares issuable upon the exercise or
exchange of Rights are to be listed on any national securities exchange, the
Company covenants and agrees to use its best efforts to cause, from and after
such time as the Rights become exercisable or exchangeable, all Preferred Shares
reserved for such issuance to be listed on
<PAGE>

                                                                              22

such securities exchange upon official notice of issuance upon such exercise or
exchange.

          (e)  The Company further covenants and agrees that it shall pay when
due and payable any and all Federal and state transfer taxes and charges which
may be payable in respect of the issuance or delivery of Right Certificates or
of any Preferred Shares or Common Stock or other securities upon the exercise or
exchange of the Rights.  The Company shall not, however, be required to pay any
transfer tax which may be payable in respect of any transfer or delivery of
Right Certificates to a Person other than, or in respect of the issuance or
delivery of certificates for the Preferred Shares or Common Stock or other
securities, as the case may be, in a name other than that of, the registered
holder of the Right Certificate evidencing Rights surrendered for exercise or
exchange or to issue or deliver any certificates for Preferred Shares or Common
Stock or other securities, as the case may be, upon the exercise or exchange of
any Rights until any such tax shall have been paid (any such tax being payable
by the holder of such Right Certificate at the time of surrender) or until it
has been established to the Company's satisfaction that no such tax is due.

          SECTION 10.  Preferred Shares Record Date.  Each Person in whose name
                       ----------------------------
any certificate for Preferred Shares or Common Stock or other securities is
issued upon the exercise or exchange of Rights shall for all purposes be deemed
to have become the holder of record of the Preferred Shares or Common Stock or
other securities, as the case may be, represented thereby on, and such
certificate shall be dated, the date on which the Right Certificate evidencing
such Rights was duly surrendered and payment of any Purchase Price (and any
applicable transfer taxes) was made; provided, however, that, if the date of
                                     --------  -------
such surrender and payment is a date upon which the transfer books of the
Company for the Preferred Shares or Common Stock or other securities, as the
case may be, are closed, such Person shall be deemed to have become the record
holder of such Preferred Shares or Common Stock or other securities, as the case
may be, on, and such certificate shall be dated, the next succeeding Business
Day on which the transfer books of the Company for the Preferred Shares or
Common Stock or other securities, as the case may be, are open.

          SECTION 11.  Adjustments in Rights After There Is an Acquiring Person;
                       ---------------------------------------------------------
Exchange of Rights for Shares; Business Combinations.  (a)  Upon a Person
----------------------------------------------------
becoming an Acquiring Person, proper provision shall be made so that each holder
of a Right, except as provided in Section 7(e), shall
<PAGE>

                                                                              23

thereafter have a right to receive, upon exercise thereof for the Purchase Price
in accordance with the terms of this Rights Agreement, such number of one ten-
thousandths (1/10,000s) of a Preferred Share as shall equal the result obtained
by multiplying the Purchase Price by a fraction, the numerator of which is the
number of one ten-thousandths (1/10,000s) of a Preferred Share for which such
Right is then exercisable and the denominator of which is 50% of the Market
Value of the Common Stock on the date on which such Person became an Acquiring
Person. As soon as practicable after a Person becomes an Acquiring Person
(provided the Company shall not have elected to make the exchange permitted by
Section 11(b)(i) for all outstanding Rights), the Company covenants and agrees
to use its best efforts to:

          (i)   prepare and file a registration statement under the Securities
     Act, on an appropriate form, with respect to the Preferred Shares
     purchasable upon exercise of the Rights;

          (ii)  cause such registration statement to become effective as soon as
     practicable after such filing;

          (iii) cause such registration statement to remain effective (with a
     prospectus at all times meeting the requirements of the Securities Act)
     until the Expiration Date; and

          (iv)  qualify or register the Preferred Shares purchasable upon
     exercise of the Rights under the blue sky or securities laws of such
     jurisdictions as may be necessary or appropriate.

          (b) (i) The Board of Directors of the Company may, at its option, at
any time after a Person becomes an Acquiring Person, mandatorily exchange all or
part of the then outstanding and exercisable Rights (which shall not include
Rights that shall have become null and void and nontransferable pursuant to the
provisions of Section 7(e)) for consideration per Right consisting of either (A)
one-half of the securities that would be issuable at such time upon the exercise
of one Right in accordance with Section 11(a) or, if applicable, Section
9(b)(ii) or 9(b)(iii) or (B) if applicable, the cash consideration specified in
Section 9(b)(i) (the consideration issuable per Right pursuant to this Section
11(b)(i) being the "Exchange Consideration").  The Board of Directors of the
Company may, at its option, issue, in substitution for Preferred Shares, Common
Stock in an amount per Preferred Share equal to the Formula Number (as defined
in the Certificate of Designation) if there are sufficient shares of Common
Stock
<PAGE>

                                                                              24

issued but not outstanding or authorized but unissued. If the Board of Directors
of the Company elects to exchange all the Rights for the Exchange Consideration
pursuant to this Section 11(b)(i) prior to the physical distribution of the
Right Certificates, the Corporation may distribute the Exchange Consideration in
lieu of distributing Right Certificates, in which case for purposes of this
Rights Agreement holders of Rights shall be deemed to have simultaneously
received and surrendered for exchange Right Certificates on the date of such
distribution.

          (ii)  Any action of the Board of Directors of the Company ordering the
exchange of any Rights pursuant to Section 11(b)(i) shall be irrevocable and,
immediately upon the taking of such action and without any further action and
without any notice, the right to exercise any such Right pursuant to Section
11(a) shall terminate and the only right thereafter of a holder of such Right
shall be to receive the Exchange Consideration in exchange for each such Right
held by such holder or, if the Exchange Consideration shall not have been paid
or issued, to exercise any such Right pursuant to Section 11(c)(i).  The Company
shall promptly give public notice of any such exchange; provided, however, that
                                                        --------  -------
the failure to give, or any defect in, such notice shall not affect the validity
of such exchange.  The Company promptly shall mail a notice of any such exchange
to all holders of such Rights at their last addresses as they appear upon the
registry books of the Rights Agent.  Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice.  Each such notice of exchange shall state the method by which the
exchange of the Rights for the Exchange Consideration will be effected and, in
the event of any partial exchange, the number of Rights which will be exchanged.
Any partial exchange shall be effected pro rata based on the number of Rights
(other than Rights which shall have become null and void and nontransferable
pursuant to the provisions of Section 7(e)) held by each holder of Rights.

          (c) (i)  In the event that, following a Distribution Date, directly or
indirectly, any transactions specified in the following clause (A), (B) or (C)
of this Section 11(c)(i) (each such transaction being a "Business Combination")
shall be consummated:

          (A) the Company shall consolidate with, or merge with and into, any
     Acquiring Person or any Affiliate or Associate of an Acquiring Person;
<PAGE>

                                                                              25


          (B)  any Acquiring Person or any Affiliate or Associate of an
     Acquiring Person shall merge with and into the Company and, in connection
     with such merger, all or part of the Common Shares shall be changed into or
     exchanged for capital stock or other securities of the Company or of any
     Acquiring Person or Affiliate or Associate of an Acquiring Person or cash
     or any other property; or

          (C)  the Company shall sell, lease, exchange or otherwise transfer or
     dispose of (or one or more of its Subsidiaries shall sell, lease, exchange
     or otherwise transfer or dispose of), in one or more transactions, the
     Major Part of the assets of the Company and its Subsidiaries (taken as a
     whole) to any Acquiring Person or any Affiliate or Associate of an
     Acquiring Person,

then, in each such case, proper provision shall be made so that each holder of a
Right, except as provided in Section 7(e), shall thereafter have the right to
receive, upon the exercise thereof for the Purchase Price in accordance with the
terms of this Rights Agreement, the securities specified below (or, at such
holder's option, the securities specified in Section 11(a)):

          (1)  if the Principal Party in such Business Combination has
     Registered Common Shares outstanding, each Right shall thereafter represent
     the right to receive, upon the exercise thereof for the Purchase Price in
     accordance with the terms of this Rights Agreement, such number of
     Registered Common Shares of such Principal Party, free and clear of all
     liens, encumbrances or other adverse claims, as shall have an aggregate
     Market Value as of the time of exercise thereof equal to the result
     obtained by multiplying the Purchase Price by two;

          (2)  if the Principal Party involved in such Business Combination does
     not have Registered Common Shares outstanding, each Right shall thereafter
     represent the right to receive, upon the exercise thereof for the Purchase
     Price in accordance with the terms of this Rights Agreement, at the
     election of the holder of such Right at the time of the exercise thereof,
     any of:

               (x)  such number of Common Shares of the Surviving Person in such
          Business Combination as shall have an aggregate Book Value immediately
          after giving effect to such Business Combination
<PAGE>

                                                                              26

          equal to the result obtained by multiplying the Purchase Price by two;

               (y)  such number of Common Shares of the Principal Party in such
          Business Combination (if the Principal Party is not also the Surviving
          Person in such Business Combination) as shall have an aggregate Book
          Value immediately after giving effect to such Business Combination
          equal to the result obtained by multiplying the Purchase Price by two;
          or

               (z)  if the Principal Party in such Business Combination is an
          Affiliate of one or more Persons that has Registered Common Shares
          outstanding, such number of Registered Common Shares of whichever of
          such Affiliates of the Principal Party has Registered Common Shares
          with the greatest aggregate Market Value on the date of consummation
          of such Business Combination as shall have an aggregate Market Value
          on the date of such Business Combination equal to the result obtained
          by multiplying the Purchase Price by two.

          (ii) The Company shall not consummate any Business Combination unless
each issuer of Common Shares for which Rights may be exercised, as set forth in
this Section 11(c), shall have sufficient authorized Common Shares that have not
been issued or reserved for issuance (and which shall, when issued upon exercise
thereof in accordance with this Rights Agreement, be validly issued, fully paid
and nonassessable and free of preemptive rights, rights of first refusal or any
other restrictions or limitations on the transfer or ownership thereof) to
permit the exercise in full of the Rights in accordance with this Section 11(c)
and unless prior thereto:

          (A)  a registration statement under the Securities Act on an
     appropriate form, with respect to the Rights and the Common Shares of such
     issuer purchasable upon exercise of the Rights, shall be effective under
     the Securities Act; and

          (B)  the Company and each such issuer shall have:

               (i)  executed and delivered to the Rights Agent a supplemental
          agreement providing for the assumption by such issuer of the
          obligations set forth in this Section 11(c) (including the obligation
          of such issuer to issue Common Shares upon the exercise of Rights in
          accordance with the
<PAGE>

                                                                              27

          terms set forth in Sections 11(c)(i) and 11(c)(iii)) and further
          providing that such issuer, at its own expense, shall use its best
          efforts to:

                    (x)  cause a registration statement under the Securities Act
               on an appropriate form, with respect to the Rights and the Common
               Shares of such issuer purchasable upon exercise of the Rights, to
               remain effective (with a prospectus at all times meeting the
               requirements of the Securities Act) until the Expiration Date;

                    (y)  qualify or register the Rights and the Common Shares of
               such issuer purchasable upon exercise of the Rights under the
               blue sky or securities laws of such jurisdictions as may be
               necessary or appropriate; and

                    (z)  list the Rights and the Common Shares of such issuer
               purchasable upon exercise of the Rights on each national
               securities exchange on which the Common Shares were listed prior
               to the consummation of the Business Combination or, if the Common
               Shares were not listed on a national securities exchange prior to
               the consummation of the Business Combination, on a national
               securities exchange;

               (2)  furnished to the Rights Agent a written opinion of
          independent counsel stating that such supplemental agreement is a
          valid, binding and enforceable agreement of such issuer; and

               (3)  filed with the Rights Agent a certificate of a nationally
          recognized firm of independent accountants setting forth the number of
          Common Shares of such issuer that may be purchased upon the exercise
          of each Right after the consummation of such Business Combination.

          (iii)  After consummation of any Business Combination and subject to
the provisions of Section 11(c)(ii), (A) each issuer of Common Shares for which
Rights may be exercised as set forth in this Section 11(c) shall be liable for,
and shall assume, by virtue of such Business Combination, all the obligations
and duties of the Company pursuant to this Rights Agreement, (B) the term
"Company" shall thereafter be deemed to refer
<PAGE>

                                                                              28

to such issuer, (C) each such issuer shall take such steps in connection with
such consummation as may be necessary to assure that the provisions hereof
(including the provisions of Sections 11(a), 11(b) and 11(c)) shall thereafter
be applicable, as nearly as reasonably may be, in relation to its Common Shares
thereafter deliverable upon the exercise of the Rights, and (D) the number of
Common Shares of each such issuer thereafter receivable upon exercise of any
Right shall be subject to adjustment from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions of Sections 11 and 12 and
the provisions of Section 7, 9 and 10 with respect to the Preferred Shares shall
apply, as nearly as reasonably may be, on like terms to any such Common Shares.

          SECTION 12.  Certain Adjustments.  (a)  To preserve the actual or
                       --------------------
potential economic value of the Rights, if at any time after the date of this
Rights Agreement there shall be any change in the Common Shares or the Preferred
Shares, whether by reason of stock dividends, stock splits, recapitalizations,
mergers, consolidations, combinations or exchanges of securities, split-ups,
split-offs, spin-offs, liquidations, other similar changes in capitalization,
any distribution or issuance of cash, assets, evidences of indebtedness or
subscription rights, options or warrants to holders of Common Shares or
Preferred Shares, as the case may be (other than distribution of the Rights or
regular quarterly cash dividends), or otherwise, then, in each such event the
Board of Directors of the Company shall make such appropriate adjustments in the
number of Preferred Shares (or the number and kind of other securities) issuable
upon exercise of each Right, the Purchase Price and Redemption Price in effect
at such time and the number of Rights outstanding at such time (including the
number of Rights or fractional Rights associated with each Common Share) such
that following such adjustment such event shall not have had the effect of
reducing or limiting the benefits the holders of the Rights would have had
absent such event.

          (b)  If, as a result of an adjustment made pursuant to Section 12(a),
the holder of any Right thereafter exercised shall become entitled to receive
any securities other than Preferred Shares, thereafter the number of such
securities so receivable upon exercise of any Right shall be subject to
adjustment from time to time in a manner and on terms as nearly equivalent as
practicable to the provisions of Sections 11 and 12 and the provisions of
Sections 7, 9 and 10 with respect to the Preferred Shares shall apply, as nearly
as reasonably may be, on like terms to any such other securities.
<PAGE>

                                                                              29

          (c)  All Rights originally issued by the Company subsequent to any
adjustment made to the amount of Preferred Shares or other securities relating
to a Right shall evidence the right to purchase, for the Purchase Price, the
adjusted number and kind of securities purchasable from time to time hereunder
upon exercise of the Rights, all subject to further adjustment as provided
herein.

          (d)  Irrespective of any adjustment or change in the Purchase Price or
the number of Preferred Shares or number or kind of other securities issuable
upon the exercise of the Rights, the Right Certificates theretofore and
thereafter issued may continue to express the terms that were expressed in the
initial Right Certificates issued hereunder.

          (e)  In any case in which action taken pursuant to Section 12(a)
requires that an adjustment be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuing to the holder of any Right exercised after such record date
the Preferred Shares and/or other securities, if any, issuable upon such
exercise over and above the Preferred Shares and/or other securities, if any,
issuable before giving effect to such adjustment; provided, however, that the
                                                  --------  -------
Company shall deliver to such holder a due bill or other appropriate instrument
evidencing such holder's right to receive such additional securities upon the
occurrence of the event requiring such adjustment.

          SECTION 13.  Certificate of Adjustment.  Whenever an adjustment is
                       --------------------------
made as provided in Section 11 or 12, the Company shall (a) promptly prepare a
certificate setting forth such adjustment and a brief statement of the facts
accounting for such adjustment, (b) promptly file with the Rights Agent and with
each transfer agent for the Preferred Shares a copy of such certificate and (c)
mail a brief summary thereof to each holder of a Right Certificate (or, prior to
the Distribution Date, of the Common Shares) in accordance with Section 25. The
Rights Agent shall be fully protected in relying on any such certificate and on
any adjustment therein contained.

          SECTION 14.  Additional Covenants.  (a)  Notwithstanding any other
                       ---------------------
provision of this Rights Agreement, no adjustment to the number of Preferred
Shares (or fractions of a share) or other securities for which a Right is
exercisable or the number of Rights outstanding or associated with each Common
Share or any similar or other adjustment shall be made or be effective if such
adjustment would have the effect of reducing or limiting the benefits the
holders
<PAGE>

                                                                              30

of the Rights would have had absent such adjustment, including the benefits
under Sections 11 and 12, unless the terms of this Rights Agreement are amended
so as to preserve such benefits.

          (b)  The Company covenants and agrees that, after the Distribution
Date, except as permitted by Section 26, it shall not take (or permit any
Subsidiary of the Company to take) any action if at the time such action is
taken it is intended or reasonably foreseeable that such action will reduce or
otherwise limit the benefits the holders of the Rights would have had absent
such action, including the benefits under Sections 11 and 12. Any action taken
by the Company during any period after any Person becomes an Acquiring Person
but prior to the Distribution Date shall be null and void unless such action
could be taken under this Section 14(b) from and after the Distribution Date.
The Company shall not consummate any Business Combination if any issuer of
Common Shares for which Rights may be exercised after such Business Combination
in accordance with Section 11(c) shall have taken any action that reduces or
otherwise limits the benefits the holders of the Rights would have had absent
such action, including the benefits under Sections 11 and 12.

          SECTION 15.  Fractional Rights and Fractional Shares.  (a)  The
                       ----------------------------------------
Company may, but shall not be required to, issue fractions of Rights or
distribute Right Certificates which evidence fractional Rights. In lieu of such
fractional Rights, the Company may pay to the registered holders of the Right
Certificates with regard to which such fractional Rights would otherwise be
issuable an amount in cash equal to the same fraction of the current market
value of a whole Right. For purposes of this Section 15(a), the current market
value of a whole Right shall be the closing price of the Rights (as determined
pursuant to the second and third sentences of the definition of Market Value
contained in Section 1) for the Trading Day immediately prior to the date on
which such fractional Rights would have been otherwise issuable.

          (b)  The Company may, but shall not be required to, issue fractions of
Preferred Shares upon exercise of the Rights or distribute certificates that
evidence fractional Preferred Shares. In lieu of fractional Preferred Shares,
the Company may elect to (i) utilize a depository arrangement as provided by the
terms of the Preferred Shares or (ii) in the case of a fraction of a Preferred
Share (other than one ten-thousandth (1/10,000th) of a Preferred Share or any
integral multiple thereof), pay to the registered holders of Right Certificates
at the time such
<PAGE>

                                                                              31

Rights are exercised as herein provided an amount in cash equal to the same
fraction of the current Market Value of one Preferred Share, if any are
outstanding and publicly traded (or the Formula Number times the current Market
Value of one share of Common Stock if the Preferred Shares are not outstanding
and publicly traded). For purposes of this Section 15(b), the current Market
Value of a Preferred Share (or share of Common Stock) shall be the closing price
of a Preferred Share (or share of Common Stock) (as determined pursuant to the
second and third sentences of the definition of Market Value contained in
Section 1) for the Trading Day immediately prior to the date of such exercise.
If, as a result of an adjustment made pursuant to Section 12(a), the holder of
any Right thereafter exercised shall become entitled to receive any securities
other than Preferred Shares, the provisions of this Section 15(b) shall apply,
as nearly as reasonably may be, on like terms to such other securities.

          (c)  The Company may, but shall not be required to, issue fractions of
Common Stock upon exchange of Rights pursuant to Section 11(b), or to distribute
certificates that evidence fractional Common Stock. In lieu of such fractional
Common Stock, the Company may pay to the registered holders of the Right
Certificates with regard to which such fractional Common Stock would otherwise
be issuable an amount in cash equal to the same fraction of the current Market
Value of one share of Common Stock as of the date on which a Person became an
Acquiring Person.

          (d)  The holder of Rights by the acceptance of the Rights expressly
waives his right to receive any fractional Rights or any fractional shares upon
exercise of a Right except as provided in this Section 15.

          SECTION 16.  Rights of Action.  (a)  All rights of action in respect
                       -----------------
of this Rights Agreement are vested in the respective registered holders of the
Right Certificates (or, prior to the Distribution Date, the registered holders
of the Common Shares); and any registered holder of any Right Certificate (or,
prior to the Distribution Date, of the Common Shares), without the consent of
the Rights Agent or of the holder of any other Right Certificate (or, prior to
the Distribution Date, of the Common Shares) may, in his own behalf and for his
own benefit, enforce, and may institute and maintain any suit, action or
proceeding against the Company to enforce, or otherwise act in respect of, his
right to exercise the Rights evidenced by such Right Certificate in the manner
provided in such Right Certificate and in this Rights Agreement. Without
limiting the foregoing or any remedies available to the holders of
<PAGE>

                                                                              32

Rights, it is specifically acknowledged that the holders of Rights would not
have an adequate remedy at law for any breach of this Rights Agreement and shall
be entitled to specific performance of the obligations of any Person under, and
injunctive relief against actual or threatened violations of the obligations of
any Person subject to, this Rights Agreement.

          (b)  Any holder of Rights who prevails in an action to enforce the
provisions of this Rights Agreement shall be entitled to recover the reasonable
costs and expenses, including attorneys' fees, incurred in such action.

          SECTION 17.  Transfer and Ownership of Rights and Right Certificates.
                       --------------------------------------------------------
(a)  Prior to the Distribution Date, the Rights shall be transferable only in
connection with the transfer of the Common Shares and the Right associated with
each Common Share shall, subject to the proviso set forth in Section 3(c), be
automatically transferred upon the transfer of each Common Share.

          (b)  After the Distribution Date, the Right Certificates shall be
transferable, subject to Section 7(e), only on the registry books of the Rights
Agent if surrendered at the principal office of the Rights Agent, duly endorsed
or accompanied by a proper instrument of transfer.

          (c)  The Company and the Rights Agent may deem and treat the Person in
whose name a Right Certificate (or, prior to the Distribution Date, the
associated Common Shares certificate) is registered as the absolute owner
thereof and of the Rights evidenced thereby (notwithstanding any notations of
ownership or writing on the Right Certificates or the associated certificate for
Common Shares made by anyone other than the Company or the Rights Agent) for all
purposes whatsoever, and neither the Company nor the Rights Agent shall be
affected by any notice to the contrary.

          SECTION 18.  Right Certificate Holder Not Deemed a Stockholder.  No
                       --------------------------------------------------
holder, as such, of any Right Certificate shall be entitled to vote or receive
dividends or be deemed, for any purpose, the holder of the Preferred Shares or
of any other securities of the Company which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Company,
including any right to vote for the election of directors or upon any matter
submitted to stockholders at any meeting thereof, or to give or withhold consent
to any
<PAGE>

                                                                              33

corporate action, or to receive notice of meetings or other actions affecting
stockholders, or to receive dividends or other distributions or subscription
rights, or otherwise, until the Right or Rights evidenced by such Right
Certificate shall have been exercised in accordance with the provisions hereof.

          SECTION 19.  Concerning the Rights Agent. (a)  The Company agrees to
                       ----------------------------
pay to the Rights Agent reasonable compensation for all services rendered by it
hereunder and from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Rights Agreement and the exercise and performance of its
duties hereunder, including any taxes or governmental charges imposed as a
result of the action taken by it hereunder (other than any taxes on the fees
payable to it).

          (b)  The Rights Agent shall be protected and shall incur no liability
for or in respect of any action taken, suffered or omitted by it in connection
with its administration of this Rights Agreement in reliance upon any Right
Certificate or certificate for the Common Shares or for other securities of the
Company, instrument of assignment or transfer, power of attorney, endorsement,
affidavit, letter, notice, direction, consent, certificate, statement, or other
paper or document believed by it to be genuine and to be signed, executed and,
where necessary, verified or acknowledged, by the proper Person or Persons.

          SECTION 20.  Merger or Consolidation or Change of Rights Agent.  (a)
                       --------------------------------------------------
Any corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the stock transfer or
corporate trust business of the Rights Agent or any successor Rights Agent,
shall be the successor to the Rights Agent under this Rights Agreement without
the execution or filing of any paper or any further act on the part of any of
the parties hereto; provided that such corporation would be eligible for
                    --------
appointment as a successor Rights Agent under the provisions of Section 22. In
case, at the time such successor Rights Agent shall succeed to the agency
created by this Rights Agreement, any of the Right Certificates shall have been
countersigned but not delivered, any such successor Rights Agent may adopt the
countersignature of the predecessor Rights Agent and deliver such Right
Certificates so countersigned; and, in case at that time any of the Right
Certificates shall not have been countersigned, any succes-
<PAGE>

                                                                              34

sor Rights Agent may countersign such Right Certificates either in the name of
the predecessor Rights Agent or in the name of the successor Rights Agent; and
in all such cases such Right Certificates shall have the full force provided in
the Right Certificates and in this Rights Agreement.

          (b)  In case at any time the name of the Rights Agent shall be changed
and at such time any of the Right Certificates shall have been countersigned but
not delivered, the Rights Agent may adopt the countersignature under its prior
name and deliver Right Certificates so countersigned; and, in case at that time
any of the Right Certificates shall not have been countersigned, the Rights
Agent may countersign such Right Certificates either in its prior name or in its
changed name; and in all such cases such Right Certificates shall have the full
force provided in the Right Certificates and in this Rights Agreement.

          SECTION 21.  Duties of Rights Agent.  The Rights Agent undertakes the
                       -----------------------
duties and obligations imposed by this Rights Agreement upon the following terms
and conditions, by all of which the Company and the holders of Right
Certificates (or, prior to the Distribution Date, of the Common Shares), by
their acceptance thereof, shall be bound:

          (a)  The Rights Agent may consult with legal counsel (who may be legal
counsel for the Company), and the opinion of such counsel shall be full and
complete authorization and protection to the Rights Agent as to any action
taken, suffered or omitted by it in good faith and in accordance with such
opinion.

          (b)  Whenever in the performance of its duties under this Rights
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter (including the identity of any Acquiring Person) be proved or established
by the Company prior to taking, refraining from taking or suffering any action
hereunder, such fact or matter (unless other evidence in respect thereof be
herein specifically prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer, the Chief Financial Officer, a Vice President (whether
preceded by any additional title), the Treasurer or the Secretary of the Company
and delivered to the Rights Agent; and such certificate shall be full
authorization to the Rights Agent for any action taken or suffered in good faith
by it under the provisions of this Rights Agreement in reliance upon such
certificate.
<PAGE>

                                                                              35

          (c)  The Rights Agent shall be liable hereunder only for its own
negligence, bad faith or wilful misconduct.

          (d)  The Rights Agent shall not be liable for or by reason of any of
the statements of fact or recitals contained in this Rights Agreement or in the
Right Certificates (except as to its countersignature thereof) or be required
to verify the same, but all such statements and recitals are and shall be deemed
to have been made by the Company only.

          (e)  The Rights Agent shall not be under any responsibility in respect
of the validity of this Rights Agreement or the execution and delivery hereof
(except the due execution hereof by the Rights Agent) or in respect of the
validity or execution of any Right Certificate (except its countersignature
thereof); nor shall it be responsible for any breach by the Company of any
covenant or condition contained in this Rights Agreement or in any Right
Certificate; nor shall it be responsible for any adjustment required under the
provisions of Section 11 or 12 or responsible for the manner, method or amount
of any such adjustment or the ascertaining of the existence of facts that would
require any such adjustment (except with respect to the exercise of Rights
evidenced by Right Certificates after actual notice of any such adjustment); nor
shall it by any act hereunder be deemed to make any representation or warranty
as to the authorization or reservation of any Preferred Shares or shares of
Common Stock to be issued pursuant to this Rights Agreement or any Right
Certificate or as to whether any Preferred Shares or shares of Common Stock
will, when so issued, be validly authorized and issued, fully paid and
nonassessable.

          (f)  The Company agrees that it shall perform, execute, acknowledge
and deliver or cause to be performed, executed, acknowledged and delivered all
such further and other acts, instruments and assurances as may reasonably be
required by the Rights Agent for the carrying out or performing by the Rights
Agent of the provisions of this Rights Agreement.

          (g)  The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the Chief
Financial Officer, a Vice President (whether preceded by any additional title),
the Treasurer or the Secretary of the Company, in connection with its duties and
it shall not be liable for any action taken or suffered to be taken by it in
<PAGE>

                                                                              36

good faith in accordance with instructions of any such officer.

          (h)  The Rights Agent and any stockholder, director, officer or
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or become pecuniarily interested in any transaction in
which the Company may be interested, or contract with or lend money to the
Company or otherwise act as fully and freely as though it were not the Rights
Agent under this Rights Agreement. Nothing herein shall preclude the Rights
Agent from acting in any other capacity for the Company or for any other legal
entity.

          (i)  The Rights Agent may execute and exercise any of the rights or
powers hereby vested in it or perform any duty hereunder either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Company resulting from any such act, default,
neglect or misconduct provided reasonable care was exercised in the selection
and continued employment thereof.

          (j)  The Company shall indemnify the Rights Agent for, and hold it
harmless against, any loss, liability, claim or expense ("Loss") arising out of
or in connection with its duties under this Agreement, including then costs and
expenses of defending itself against any Loss, unless such Loss shall have been
determined by a court of competent jurisdiction to be a result of the Rights
Agent's gross negligence or intentional misconduct. In no case, however, will
the Rights Agent be liable for special, indirect, incidental, punitive or
consequential loss or damages of any kind whatsoever (including but not limited
to lost profits), even if the Rights Agent has been advised of the possibility
of such damages. The Rights Agent shall promptly notify the Company, by letter
or by facsimile confirmed by letter, of the assertion of any action, proceeding,
suit or claim against the Rights Agent, promptly after the Rights Agent shall
have notice of any such assertion of an action, proceeding, suit or claim or
have been served with the summons or other first legal process giving
information as to the nature and basis of the action, proceeding, suit or claim.
The Company shall be entitled to participate at its own expense in the defense
of any such action, proceeding, suit or claim, and, if the Company so elects,
the Company shall assume the defense of any such action, proceeding, suit or
claim. In the event that the Company assumes such defense, the Company shall not
thereafter be liable for the fees and expenses of any additional counsel
retained by the
<PAGE>

                                                                              37

Rights Agent, so long as the Company shall retain counsel satisfactory to the
Rights Agent, in the exercise of its reasonable judgment, to defend such action,
proceeding, suit or claim. The Rights Agent agrees not to settle any litigation
in connection with any action, proceeding, suit or claim with respect to which
it may seek indemnification from the Company without the prior written consent
of the Company. The obligations of the Company under this section shall survive
the termination of this Agreement.

          SECTION 22.  Change of Rights Agent.  The Rights Agent or any
                       -----------------------
successor Rights Agent may resign and be discharged from its duties under this
Rights Agreement upon 30 days' notice in writing mailed to the Company and to
each transfer agent of the Common Shares and the Preferred Shares by registered
or certified mail, and to the holders of the Right Certificates (or, prior to
the Distribution Date, of the Common Shares) by first-class mail. The Company
may remove the Rights Agent or any successor Rights Agent upon 30 days' notice
in writing, mailed to the Rights Agent or successor Rights Agent, as the case
may be, and to each transfer agent of the Common Shares and the Preferred Shares
by registered or certified mail, and to the holders of the Right Certificates
(or, prior to the Distribution Date, of the Common Shares) by first-class mail.
If the Rights Agent shall resign or be removed or shall otherwise become
incapable of acting, the Company shall appoint a successor to the Rights Agent.
If the Company shall fail to make such appointment within a period of 30 days
after giving notice of such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Rights Agent
or by the holder of a Right Certificate (or, prior to the Distribution Date, of
the Common Shares) (who shall, with such notice, submit his Right Certificate
or, prior to the Distribution Date, the certificate representing his Common
Shares, for inspection by the Company), then the registered holder of any Right
Certificate (or, prior to the Distribution Date, of the Common Shares) may apply
to any court of competent jurisdiction for the appointment of a new Rights
Agent. Any successor Rights Agent, whether appointed by the Company or by such a
court, shall be a corporation organized and doing business under the laws of the
United States or of the State of New York (or of any other state of the United
States so long as such corporation is authorized to conduct a stock transfer or
corporate trust business in the State of New York), in good standing, having a
principal office in the State of New York, which is authorized under such laws
to exercise stock transfer or corporate trust powers and is subject to
supervision or examination by Federal or state authority and which has at the
time of its appointment as
<PAGE>

                                                                              38

Rights Agent a combined capital and surplus of at least $50,000,000; provided
                                                                     --------
that the principal transfer agent for the Common Shares shall in any event be
qualified to be the Rights Agent. After appointment, the successor Rights Agent
shall be vested with the same powers, rights, duties and responsibilities as if
it had been originally named as Rights Agent without further act or deed; but
the predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment, the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Shares and the Preferred Shares, and mail a notice thereof in writing
to the registered holders of the Right Certificates (or, prior to the
Distribution Date, of the Common Shares). Failure to give any notice provided
for in this Section 22, however, or any defect therein shall not affect the
legality or validity of the resignation or removal of the Rights Agent or the
appointment of the successor Rights Agent, as the case may be.

          SECTION 23.  Issuance of Additional Rights and Right Certificates.
                       -----------------------------------------------------
Notwithstanding any of the provisions of this Rights Agreement or of the Rights
to the contrary, the Company may, at its option, issue new Right Certificates
evidencing Rights in such form as may be approved by its Board of Directors to
reflect any adjustment or change made in accordance with the provisions of this
Rights Agreement. In addition, in connection with the issuance or sale of Common
Shares following the Distribution Date and prior to the earlier of the
Redemption Date and the Expiration Date, the Company (a) shall, with respect to
Common Shares so issued or sold pursuant to the exercise of stock options or
under any employee plan or arrangement, or upon the exercise, conversion or
exchange of securities, notes or debentures issued by the Company, and (b) may,
in any other case, if deemed necessary or appropriate by the Board of Directors
of the Company, issue Right Certificates representing the appropriate number of
Rights in connection with such issuance or sale; provided, however, that (i) no
                                                 --------  -------
such Right Certificate shall be issued if, and to the extent that, the Company
shall be advised by counsel that such issuance would create a significant risk
of material adverse tax consequences to the Company or the Person to whom such
Right Certificate would be issued, (ii) no such Right Certificate shall be
issued if, and to the extent that, appropriate adjustment shall otherwise have
been made in lieu of the issuance thereof and (iii) no such Right Certificate
shall
<PAGE>

                                                                              39

be issued to an Acquiring Person or an Affiliate or Associate of an Acquiring
Person.

          SECTION 24.  Redemption and Termination.  (a)  The Board of Directors
                       ---------------------------
of the Company may, at its option, at any time prior to the earlier of (i) such
time as a Person becomes an Acquiring Person and (ii) the Expiration Date, order
the redemption of all, but not fewer than all, the then outstanding Rights at
the Redemption Price (the date of such redemption being the "Redemption Date"),
and the Company, at its option, may pay the Redemption Price either in cash or
Common Stock or other securities of the Company deemed by the Board of Directors
of the Company, in the exercise of its sole discretion, to be at least
equivalent in value to the Redemption Price.

          (b)  Immediately upon the action of the Board of Directors of the
Company ordering the redemption of the Rights, and without any further action
and without any notice, the right to exercise the Rights will terminate and the
only right thereafter of the holders of Rights shall be to receive the
Redemption Price. Within 10 Business Days after the action of the Board of
Directors of the Company ordering the redemption of the Rights, the Company
shall give notice of such redemption to the holders of the then outstanding
Rights by mailing such notice to all such holders at their last addresses as
they appear upon the registry books of the Rights Agent or, prior to the
Distribution Date, on the registry books of the transfer agent for the Common
Shares. Each such notice of redemption shall state the method by which payment
of the Redemption Price will be made. The notice, if mailed in the manner herein
provided, shall be conclusively presumed to have been duly given, whether or not
the holder of Rights receives such notice. In any case, failure to give such
notice by mail, or any defect in the notice, to any particular holder of Rights
shall not affect the sufficiency of the notice to other holders of Rights.

          SECTION 25.  Notices.  Notices or demands authorized by this Rights
                       --------
Agreement to be given or made by the Rights Agent or by the holder of a Right
Certificate (or, prior to the Distribution Date, of the Common Shares) to or on
the Company shall be sufficiently given or made if sent by first-class mail,
postage prepaid, addressed (until
<PAGE>

                                                                              40

another address is filed in writing with the Rights Agent) as follows:

          Crown Castle International Corp.
          510 Bering Drive
          Suite 500
          Houston, TX 77057
          Attention:  Corporate Secretary

Subject to the provisions of Section 22, any notice or demand authorized by this
Rights Agreement to be given or made by the Company or by the holder of a Right
Certificate (or, prior to the Distribution Date, of the Common Shares) to or on
the Rights Agent shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Company) as follows:

          ChaseMellon Shareholder Services, L.L.C.
          2323 Bryan St., Suite 2300
          Dallas, TX 75201
          Attention:  Timothy D. Oliver - Relationship Manager

Notices or demands authorized by this Rights Agreement to be given or made by
the Company or the Rights Agent to any holder of a Right Certificate (or, prior
to the Distribution Date, of the Common Shares) shall be sufficiently given or
made if sent by first-class mail, postage prepaid, addressed to such holder at
the address of such holder as shown on the registry books of the Rights Agent
or, prior to the Distribution Date, on the registry books of the transfer agent
for the Common Shares.

          SECTION 26.  Supplements and Amendments.  At any time prior to the
                       ---------------------------
time any person becomes an Acquiring Person, and subject to the last sentence of
this Section 26, the Company may, and the Rights Agent shall if the Company so
directs, supplement or amend any provision of this Rights Agreement (including
the date on which the Expiration Date or the Distribution Date shall occur, the
amount of the Purchase Price, the definition of "Acquiring Person" or the time
during which the Rights may be redeemed pursuant to Section 24) without the
approval of any holder of the Rights. From and after the Distribution Date, and
subject to applicable law, the Company may, and the Rights Agent shall if the
Company so directs, amend this Rights Agreement without the approval of any
holders of Right Certificates (a) to cure any ambiguity or to correct or
supplement any provision contained herein which may be defective or
inconsistent with any other provision of this Rights Agreement or
<PAGE>

                                                                              41

(b) to make any other provisions in regard to matters or questions arising
hereunder which the Company may deem necessary or desirable and which shall not
adversely affect the interests of the holders of Right Certificates (other than
an Acquiring Person or an Affiliate or Associate of an Acquiring Person). Any
supplement or amendment adopted during any period after any Person has become an
Acquiring Person but prior to the Distribution Date shall be null and void
unless such supplement or amendment could have been adopted under the prior
sentence from and after the Distribution Date. Any supplement or amendment to
this Rights Agreement duly approved by the Company that does not amend Sections
19, 20, 21 or 22 in a manner adverse to the Rights Agent shall become effective
immediately upon execution by the Company, whether or not also executed by the
Rights Agent. In addition, notwithstanding anything to the contrary contained in
this Rights Agreement, no supplement or amendment to this Rights Agreement shall
be made which reduces the Redemption Price (except as required by Section
12(a)).

          SECTION 27.  Successors.  All the covenants and provisions of this
                       -----------
Rights Agreement by or for the benefit of the Company or the Rights Agent shall
bind and inure to the benefit of their respective successors and assigns
hereunder.

          SECTION 28.  Benefits of Rights Agreement; Determinations and Actions
                       --------------------------------------------------------
by the Board of Directors, etc. (a)  Nothing in this Rights Agreement shall be
-------------------------------
construed to give to any Person other than the Company, the Rights Agent and the
registered holders of the Right Certificates (or, prior to the Distribution
Date, of the Common Shares) any legal or equitable right, remedy or claim under
this Rights Agreement; but this Rights Agreement shall be for the sole and
exclusive benefit of the Company, the Rights Agent and the registered holders of
the Right Certificates (or, prior to the Distribution Date, of the Common
Shares).

          (b)  Except as explicitly otherwise provided in this Rights Agreement,
the Board of Directors of the Company shall have the exclusive power and
authority to administer this Rights Agreement and to exercise all rights and
powers specifically granted to the Board of Directors of the Company or to the
Company, or as may be necessary or advisable in the administration of this
Rights Agreement, including the right and power to (i) interpret the provisions
of this Rights Agreement and (ii) make all determinations deemed necessary or
advisable for the administration of this Rights Agreement (including a
determination to redeem or not redeem the Rights or to amend
<PAGE>

                                                                              42

this Rights Agreement and a determination of whether there is an Acquiring
Person).

          (c)  Nothing contained in this Rights Agreement shall be deemed to be
in derogation of the obligation of the Board of Directors of the Company to
exercise its fiduciary duty. Without limiting the foregoing, nothing contained
herein shall be construed to suggest or imply that the Board of Directors shall
not be entitled to reject any tender offer or other acquisition proposal, or to
recommend that holders of Common Shares reject any tender offer, or to take any
other action (including the commencement, prosecution, defense or settlement of
any litigation and the submission of additional or alternative offers or other
proposals) with respect to any tender offer or other acquisition proposal that
the Board of Directors believes is necessary or appropriate in the exercise of
such fiduciary duty.

          SECTION 29.  Severability.  If any term, provision, covenant or
                       -------------
restriction of this Rights Agreement is held by a court of competent
jurisdiction or other authority to be invalid, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions of this Rights
Agreement shall remain in full force and effect and shall in no way be affected,
impaired or invalidated.

          SECTION 30.  Governing Law.  This Rights Agreement and each Right
                       --------------
Certificate issued hereunder shall be deemed to be a contract made under the law
of the State of Delaware and for all purposes shall be governed by and construed
in accordance with the law of such State applicable to contracts to be made and
performed entirely within such State; provided, however, that all provisions
regarding the rights, duties and obligations of the Rights Agent shall be
governed by and construed in accordance with the laws of the State of New York
applicable to contracts made and to be performed entirely with such State.

          SECTION 31.  Counterparts; Effectiveness.  This Rights Agreement may
                       ----------------------------
be executed in any number of counterparts and each of such counterparts shall
for all purposes be deemed to be an original, and all such counterparts shall
together constitute but one and the same instrument. This Rights Agreement shall
be effective as of the Close of Business on the date hereof.

          SECTION 32.  Descriptive Headings.  Descriptive headings of the
                       ---------------------
several Sections of this Rights Agreement
<PAGE>

                                                                              43

are inserted for convenience only and shall not control or affect the meaning or
construction of any of the provisions of this Rights Agreement.


          IN WITNESS WHEREOF, the parties hereto have caused this Rights
Agreement to be duly executed as of the day and year first above written.


                         CROWN CASTLE INTERNATIONAL CORP.,

                              by /s/ E. Blake Hawk
                                ----------------------------------
                                Name:  E. Blake Hawk
                                Title: Executive Vice President and
                                       General Counsel


                         CHASEMELLON SHAREHOLDER
                         SERVICES, L.L.C.,

                              by /s/ Patti Knight
                                ----------------------------------
                                Name:  Patti Knight
                                Title: Relationship Manager
<PAGE>

                                                                              44

                       CERTIFICATE OF THE VOTING POWERS,
                    DESIGNATIONS, PREFERENCES AND RELATIVE
                   PARTICIPATING, OPTIONAL AND OTHER SPECIAL
                    RIGHTS AND QUALIFICATIONS, LIMITATIONS
                          OR RESTRICTIONS OF SERIES A
                   PARTICIPATING CUMULATIVE PREFERRED STOCK
                                      OF
                       CROWN CASTLE INTERNATIONAL CORP.


          Pursuant to Section 151 of the General Corporation Law of the State of
Delaware, Crown Castle International Corp. (the "Company"), a corporation
organized and existing under the General Corporation Law of the State of
Delaware, in accordance with the provisions of Section 103 thereof, DOES HEREBY
CERTIFY:

          That, pursuant to the authority conferred upon the Board of Directors
of the Company by Article IV of the Amended and Restated Certificate of
Incorporation of the Company (the "Charter"), the Board of Directors (the
"Board") of the Company on August 20, 1998, adopted the following resolution:

          RESOLVED, that, pursuant to the authority vested in the Board of
     Directors of the Company in accordance with the provisions of the Amended
     and Restated Certificate of Incorporation of the Company and the provisions
     of Section 151(g) of the General Corporation Law of the State of Delaware,
     the issuance of a series of Preferred Stock, par value $0.01 per share (the
     "Preferred Stock"), which shall consist of 2,000,000 of the shares of
     Preferred Stock which the Company has authority to issue, is authorized,
     and the Board hereby fixes the voting powers, preferences and relative,
     participating, optional and other special rights of the shares of such
     series, and the qualifications, limitations or restrictions thereof are
     hereby amended and restated to read in their entirety (in addition to the
     designation, preferences and relative, participating and other special
     rights, and the qualifications, limitations or restrictions thereof, set
     forth in the Amended and Restated Certificate of Incorporation, as amended,
     which are applicable to the Preferred Stock of all series) as follows:

          SECTION 1.   Designation and Number of Shares.  The shares of such
                       ---------------------------------
series shall be designated as "Series A Participating Cumulative Preferred
Stock" (the "Series A Preferred Stock"). The number of shares initially
constituting the Series A Preferred Stock shall be 2,000,000; provided, however,
                                                              --------  -------
that, if more than a total of 2,000,000 shares of Series A Preferred Stock shall
be issuable upon the
<PAGE>

                                                                              45

exercise of Rights (the "Rights") issued pursuant to the Rights Agreement dated
as of August 21, 1998, between the Company and ChaseMellon Shareholder Services,
L.L.C., as Rights Agent (the "Rights Agreement"), the Board of Directors of the
Company, pursuant to Section 151(g) of the General Corporation Law of the State
of Delaware, shall direct by resolution or resolutions that a certificate be
properly executed, acknowledged, filed and recorded, in accordance with the
provisions of Section 103 thereof, providing for the total number of shares of
Series A Preferred Stock authorized to be issued to be increased (to the extent
that the Charter then permits) to the largest number of whole shares (rounded up
to the nearest whole number) issuable upon exercise of such Rights.

          SECTION 2.   Dividends or Distributions.
                       --------------------------
(a) Subject to the superior rights of the holders of shares of any other series
of Preferred Stock or other class of capital stock of the Company ranking
superior to the shares of Series A Preferred Stock with respect to dividends,
the holders of shares of the Series A Preferred Stock shall be entitled to
receive, when, as and if declared by the Board of Directors, out of the assets
of the Company legally available therefor, (1) quarterly dividends payable in
cash on the 1st day of February, May, August and November in each year, or such
other dates as the Board of Directors of the Company shall approve (each such
date being referred to herein as a "Quarterly Dividend Payment Date"),
commencing on the first Quarterly Dividend Payment Date after the first issuance
of a share or a fraction of a share of Series A Preferred Stock, in the amount
of $[ ] per whole share (rounded to the nearest cent) less the amount of all
cash dividends declared on the Series A Preferred Stock pursuant to the
following clause (2) since the immediately preceding Quarterly Dividend Payment
Date or, with respect to the first Quarterly Dividend Payment Date, since the
first issuance of any share or fraction of a share of Series A Preferred Stock
(the total of which shall not, in any event, be less than zero) and (2)
dividends payable in cash on the payment date for each cash dividend declared on
the Common Shares in an amount per whole share (rounded to the nearest cent)
equal to the Formula Number (as hereinafter defined) then in effect times the
cash dividends then to be paid on each Common Share. In addition, if the Company
shall pay any dividend or make any distribution on the Common Shares payable in
assets, securities or other forms of noncash consideration (other than dividends
or distributions solely in Common Shares), then, in each such case, the Company
shall simultaneously pay or make on each outstanding whole share of Series A
Preferred Stock a dividend or distribution in like kind equal to the Formula
Number then in effect times such dividend or distribution on each Common Share.
As used
<PAGE>

                                                                              46

herein, the "Formula Number" shall be 1,000; provided, however, that, if at any
                                             --------  -------
time after August 21, 1998, the Company shall (i) declare or pay any dividend on
the Common Shares payable in shares or make any distribution on the Common
Shares in Common Shares, (ii) subdivide (by a stock split or otherwise) the
outstanding shares into a larger number of Common Shares or (iii) combine (by a
reverse stock split or otherwise) the outstanding Common Shares into a smaller
number of Common Shares, then in each such event the Formula Number shall be
adjusted to a number determined by multiplying the Formula Number in effect
immediately prior to such event by a fraction, the numerator of which is the
number of Common Shares that are outstanding immediately after such event and
the denominator of which is the number of shares of Common Stock that are
outstanding immediately prior to such event (and rounding the result to the
nearest whole number); and provided further that, if at any time after August
                           ----------------
21, 1998, the Company shall issue any shares of its capital stock in a merger,
reclassification, or change of the outstanding Common Shares, then in each such
event the Formula Number shall be appropriately adjusted to reflect such merger,
reclassification or change so that each share of Preferred Stock continues to be
the economic equivalent of a Formula Number of Common Shares prior to such
merger, reclassification or change.

          (b)  The Company shall declare a dividend or distribution on the
Series A Preferred Stock as provided in Section 2(a) immediately prior to or at
the same time it declares a dividend or distribution on the Common Shares (other
than a dividend or distribution solely in Common Shares); provided, however,
                                                          --------  -------
that, in the event no dividend or distribution (other than a dividend or
distribution in Common Shares) shall have been declared on the Common Shares
during the period between any Quarterly Dividend Payment Date and the next
subsequent Quarterly Dividend Payment Date, a dividend of $1 per share on the
Series A Preferred Stock shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date. The Board of Directors may fix a record date
for the determination of holders of shares of Series A Preferred Stock entitled
to receive a dividend or distribution declared thereon, which record date shall
be the same as the record date for any corresponding dividend or distribution on
the Common Shares.

          (c)  Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Preferred Stock from and after the Quarterly Dividend Payment
Date next preceding the date of original issue of such shares of Series A
Preferred Stock; provided, however, that dividends on such shares which are
                 --------  -------
originally issued after the record date for
<PAGE>

                                                                              47

the determination of holders of shares of Series A Preferred Stock entitled to
receive a quarterly dividend and on or prior to the next succeeding Quarterly
Dividend Payment Date shall begin to accrue and be cumulative from and after
such Quarterly Dividend Payment Date. Notwithstanding the foregoing, dividends
on shares of Series A Preferred Stock which are originally issued prior to the
record date for the determination of holders of shares of Series A Preferred
Stock entitled to receive a quarterly dividend on the first Quarterly Dividend
Payment Date shall be calculated as if cumulative from and after the last day of
the fiscal quarter next preceding the date of original issuance of such shares.
Accrued but unpaid dividends shall not bear interest. Dividends paid on the
shares of Series A Preferred Stock in an amount less than the total amount of
such dividends at the time accrued and payable on such shares shall be allocated
pro rata on a share-by-share basis among all such shares at the time
outstanding.

          (d)  So long as any shares of the Series A Preferred Stock are
outstanding, no dividends or other distributions shall be declared, paid or
distributed, or set aside for payment or distribution, on the Common Shares
unless, in each case, the dividend required by this Section 2 to be declared on
the Series A Preferred Stock shall have been declared.

          (e)  The holders of the shares of Series A Preferred Stock shall not
be entitled to receive any dividends or other distributions except as provided
herein.

          SECTION 3.   Voting Rights.  The holders of shares of Series A
                       --------------
Preferred Stock shall have the following voting rights:

          (a)  Each holder of Series A Preferred Stock shall be entitled to a
number of votes equal to the Formula Number then in effect, for each share of
Series A Preferred Stock held of record on each matter on which holders of the
Common Shares or stockholders generally are entitled to vote, multiplied by the
maximum number of votes per share which any holder of the Common Shares or
stockholders generally then have with respect to such matter (assuming any
holding period or other requirement to vote a greater number of shares is
satisfied).

          (b)  Except as otherwise provided herein, by the Charter or by
applicable law, the holders of shares of Series A Preferred Stock and the
holders of shares of Common Stock (and any other capital stock of the Company at
the time entitled thereto) shall vote together as one class for the election of
directors of the Company and on all other matters
<PAGE>

                                                                              48

submitted to a vote of stockholders of the Company except that while holders of
shares of Series A Preferred Stock, voting as a class, are entitled to elect two
directors as provided in the Charter, they shall not be entitled to participate
with the Common Stock (or any other capital stock as aforesaid) in the election
of any other directors.

          (c)  Except as provided herein, in Section 11 or by applicable law,
holders of Series A Preferred Stock shall have no special voting rights and
their consent shall not be required (except to the extent they are entitled to
vote with holders of Common Stock as set forth herein) for authorizing or taking
any corporate action.

          SECTION 4.   Certain Restrictions.  (a)  Whenever quarterly dividends
                       ---------------------
or other dividends or distributions payable on the Series A Preferred Stock as
provided in Section 2 are in arrears, thereafter and until all accrued and
unpaid dividends and distributions, whether or not declared, on shares of Series
A Preferred Stock outstanding shall have been paid in full, the Company shall
not

          (i)    declare or pay dividends on, make any other distributions on,
     or redeem or purchase or otherwise acquire for consideration any shares of
     stock ranking junior (either as to dividends or upon liquidation,
     dissolution or winding up) to the Series A Preferred Stock;

          (ii)   declare or pay dividends on or make any other distributions on
     any shares of stock ranking on a parity (either as to dividends or upon
     liquidation, dissolution or winding up) with the Series A Preferred Stock,
     except dividends paid ratably on the Series A Preferred Stock and all such
     parity stock on which dividends are payable or in arrears in proportion to
     the total amounts to which the holders of all such shares are then
     entitled;

          (iii)  redeem or purchase or otherwise acquire for consideration
     shares of any stock ranking on a parity (either as to dividends or upon
     liquidation, dissolution or winding up) with the Series A Preferred Stock;
     provided that the Company may at any time redeem, purchase or otherwise
     --------
     acquire shares of any such parity stock in exchange for shares of any stock
     of the Company ranking junior (either as to dividends or upon dissolution,
     liquidation or winding up) to the Series A Preferred Stock; or

          (iv)   purchase or otherwise acquire for consideration any shares of
     Series A Preferred Stock, or any shares of
<PAGE>

                                                                              49



     stock ranking on a parity with the Series A Preferred Stock, except in
     accordance with a purchase offer made in writing or by publication (as
     determined by the Board of Directors) to all holders of such shares upon
     such terms as the Board of Directors, after consideration of the respective
     annual dividend rates and other relative rights and preferences of the
     respective series and classes, shall determine in good faith will result in
     fair and equitable treatment among the respective series or classes.

          (b)  The Company shall not permit any subsidiary of the Company to
purchase or otherwise acquire for consideration any shares of stock of the
Company unless the Company could, under paragraph (a) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

          SECTION 5.  Liquidation Rights.  Upon the liquidation, dissolution or
                      -------------------
winding up of the Company, whether voluntary or involuntary, no distribution
shall be made (1) to the holders of shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock unless, prior thereto, the holders of shares of Series A
Preferred Stock shall have received an amount equal to the accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment, plus an amount equal to the greater of (x) $1,000 per whole share
or (y) an aggregate amount per share equal to the Formula Number then in effect
times the aggregate amount to be distributed per share to holders of Common
Shares or (2) to the holders of stock ranking on a parity (either as to
dividends or upon liquidation, dissolution or winding up) with the Series A
Preferred Stock, except distributions made ratably on the Series A Preferred
Stock and all other such parity stock in proportion to the total amounts to
which the holders of all such shares are entitled upon such liquidation,
dissolution or winding up.

          SECTION 6.  Consolidation, Merger, etc.  In case the Company shall
                      ---------------------------
enter into any consolidation, merger, combination or other transaction in which
the Common Shares are exchanged for or changed into other stock or securities,
cash or any other property, then in any such case the then outstanding shares of
Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share equal to the Formula Number then in effect
times the aggregate amount of stock, securities, cash or any other property
(payable in kind), as the case may be, into which or for which each Common Share
is exchanged or changed. In the event both this Section 6 and Section 2 appear
to apply to a transaction, this Section 6 will control.
<PAGE>

                                                                              50

          SECTION 7.   No Redemption; No Sinking Fund. (a)  The shares of Series
                       ------------------------------
A Preferred Stock shall not be subject to redemption by the Company or at the
option of any holder of Series A Preferred Stock; provided, however, that the
                                                  --------  -------
Company may purchase or otherwise acquire outstanding shares of Series A
Preferred Stock in the open market or by offer to any holder or holders of
shares of Series A Preferred Stock.

          (b)  The shares of Series A Preferred Stock shall not be subject to or
entitled to the operation of a retirement or sinking fund.

          SECTION 8.   Ranking.  The Series A Preferred Stock shall rank junior
                       --------
to all other series of Preferred Stock of the Company unless the Board of
Directors shall specifically determine otherwise in fixing the powers,
preferences and relative, participating, optional and other special rights of
the shares of such series and the qualifications, limitations and restrictions
thereof.

          SECTION 9.   Fractional Shares.  The Series A Preferred Stock shall be
                       ------------------
issuable upon exercise of the Rights issued pursuant to the Rights Agreement in
whole shares or in any fraction of a share that is one one-thousandth of a share
or any integral multiple of such fraction which shall entitle the holder, in
proportion to such holder's fractional shares, to receive dividends, exercise
voting rights, participate in distributions and to have the benefit of all other
rights of holders of Series A Preferred Stock. In lieu of fractional shares, the
Company, prior to the first issuance of a share or a fraction of a share of
Series A Preferred Stock, may elect (a) to make a cash payment as provided in
the Rights Agreement for fractions of a share other than one one-thousandths of
a share or any integral multiple thereof or (b) to issue depository receipts
evidencing such authorized fraction of a share of Series A Preferred Stock
pursuant to an appropriate agreement between the Company and a depository
selected by the Company; provided that such agreement shall provide that the
                         --------
holders of such depository receipts shall have all the rights, privileges and
preferences to which they are entitled as holders of the Series A Preferred
Stock.

          SECTION 10.  Reacquired Shares.  Any shares of Series A Preferred
                       ------------------
Stock purchased or otherwise acquired by the Company in any manner whatsoever
shall be retired and canceled promptly after the acquisition thereof. All such
shares shall upon their cancelation become authorized but unissued shares of
Preferred Stock, without designation as to series until such shares are once
more designated as part of a
<PAGE>

                                                                              51

particular series by the Board of Directors pursuant to the provisions of the
Charter.

          SECTION 11.  Amendment.  None of the powers, preferences and relative,
                       ----------
participating, optional and other special rights of the Series A Preferred Stock
as provided herein, in the Company's by-laws or in the Charter shall be amended
in any manner which would alter or change the powers, preferences, rights or
privileges of the holders of Series A Preferred Stock so as to affect them
adversely without the affirmative vote of the holders of at least 66-2/3% of the
outstanding shares of Series A Preferred Stock, voting as a separate class;
provided, however, that no such amendment approved by the holders of at least
--------  -------
66-2/3% of the outstanding shares of Series A Preferred Stock shall be deemed to
apply to the powers, preferences, rights or privileges of any holder of shares
of Series A Preferred Stock originally issued upon exercise of the Rights after
the time of such approval without the approval of such holder.

          IN WITNESS WHEREOF, the Company has caused this Certificate to be duly
executed in its corporate name on this 21st day of August, 1998.


                         CROWN CASTLE INTERNATIONAL CORP.,

                           by
                              ___________________________
                              Name:
                              Title:
<PAGE>

                      AMENDED CERTIFICATE OF DESIGNATION

                                      of

               SERIES A PARTICIPATING CUMULATIVE PREFERRED STOCK

                                      of

                       CROWN CASTLE INTERNATIONAL CORP.

            Pursuant to Section 151 of the General Corporation Law
                           of the State of Delaware

          CROWN CASTLE INTERNATIONAL CORP., a corporation organized and existing
under the General Corporation Law of the State of Delaware (the "Corporation"),
in accordance with the provisions of Section 103 thereof, DOES HEREBY CERTIFY:

     1.   That by resolution of the Board of Directors of the Company dated
August 20, 1998, and by a Certificate of Designation filed in the office of the
Secretary of State of Delaware on August 21, 1998, the Company authorized a
series of 2,000,000 shares of Series A Participating Cumulative Preferred Stock,
par value $.01 per share, of the Company (the "Series A Preferred Stock") and
established the powers, designations, preferences and relative, participating,
optional and other rights of the Series A Preferred and the qualifications,
limitations or restrictions thereof.

     2.   As of the date hereof no shares of Series A Preferred Stock are
outstanding and no shares of Series A Preferred Stock have been issued.

     3.   That pursuant to the authority conferred on the Board of Directors of
the Company by its Restated Certificate of Incorporation and the provisions of
Section 151(g) of the General Corporation Law of the State of Delaware, the
Board of Directors on August 2, 2000 adopted the following resolution amending
certain provisions of said Certificate of Designation:

          RESOLVED, that the Certificate of Designation in respect of the Series
A Participating Cumulative Preferred Stock of the Company be amended by (i)
replacing the number 2,000,000 in each of the two instances it appears in
Section 1 thereof with the number 1,000,000 and (ii) replacing the number 1,000
appearing in the third sentence of Section 2(a) thereof with the number 10,000.
<PAGE>

                                                                               2

          IN WITNESS WHEREOF, the undersigned has executed this Certificate this
__ day of ________, 2000.


                                        CROWN CASTLE INTERNATIONAL CORP.,

                                             By:
                                                 _______________________________
                                                 Name:
                                                 Title:
<PAGE>

                                                                       EXHIBIT B



                          [Form of Right Certificate]


Certificate No. [R]-
            ___________ Rights


          NOT EXERCISABLE AFTER August 21, 2008, OR EARLIER IF REDEEMED BY THE
          COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE
          COMPANY, AT $.01 PER RIGHT, ON THE TERMS SET FORTH IN THE RIGHTS
          AGREEMENT. RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON OR AN
          AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE
          DEFINED IN THE RIGHTS AGREEMENT) AND BY ANY SUBSEQUENT HOLDER OF SUCH
          RIGHTS ARE NULL AND VOID AND NONTRANSFERABLE.


                               Right Certificate

                       CROWN CASTLE INTERNATIONAL CORP.


          This certifies that                     , or registered assigns, is
the registered owner of the number of Rights set forth above, each of which
entitles the owner thereof, subject to the terms, provisions and conditions of
the Rights Agreement dated as of August 21, 1998 (the "Rights Agreement"),
between Crown Castle International Corp., a Delaware corporation (the
"Company"), and ChaseMellon Shareholder Services, L.L.C., as Rights Agent (the
"Rights Agent"), unless the Rights evidenced hereby shall have been previously
redeemed by the Company, to purchase from the Company at any time after the
Distribution Date (as defined in the Rights Agreement) and prior to 5:00 p.m.,
New York City time, on the 10th anniversary of the date of the Rights Agreement
(the "Expiration Date"), at the principal office or offices of the Rights Agent
designated for such purpose, or its successors as Rights Agent, one ten-
thousandth (1/10,000th) of a fully paid, nonassessable share of Series A
Participating Cumulative Preferred Stock, par value $.01 per share, of the
Company (the "Preferred Shares"), at a purchase price per one ten-thousandth
(1/10,000th) of a share equal to $110 (the "Purchase Price") payable in cash,
upon presentation and surrender of this Right Certificate with the Form of
Election to Purchase duly executed.

          The Purchase Price and the number and kind of shares which may be
purchased upon exercise of each Right evidenced by this Right Certificate, as
set forth above, are the Purchase Price and the number and kind of shares which
may be
<PAGE>

                                                                               2

so purchased as of             . As provided in the Rights Agreement, the
Purchase Price and the number and kind of shares which may be purchased upon the
exercise of each Right evidenced by this Right Certificate are subject to
modification and adjustment upon the happening of certain events.

          If the Rights evidenced by this Right Certificate are at any time
beneficially owned by an Acquiring Person or an Affiliate or Associate of an
Acquiring Person (as such terms are defined in the Rights Agreement), such
Rights shall be null and void and nontransferable and the holder of any such
Right (including any purported transferee or subsequent holder) shall not have
any right to exercise or transfer any such Right.

          This Right Certificate is subject to all the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
reference to the Rights Agreement is hereby made for a full description of the
rights, limitations of rights, obligations, duties and immunities hereunder of
the Rights Agent, the Company and the holders of the Right Certificates. Copies
of the Rights Agreement are on file at the above-mentioned office of the Rights
Agent and are also available from the Company upon written request.

          This Right Certificate, with or without other Right Certificates, upon
surrender at the principal stock transfer or corporate trust office of the
Rights Agent, may be exchanged for another Right Certificate or Right
Certificates of like tenor and date evidencing Rights entitling the holder to
purchase a like aggregate number and kind of shares as the Rights evidenced by
the Right Certificate or Right Certificates surrendered shall have entitled such
holder to purchase. If this Right Certificate shall be exercised in part, the
holder shall be entitled to receive upon surrender hereof another Right
Certificate or Right Certificates for the number of whole Rights not exercised.

          Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Right Certificate may be redeemed by the Company at its option
at a redemption price (in cash or shares of Common Stock or other securities of
the Company deemed by the Board of Directors to be at least equivalent in value)
of $.01 per Right (which amount shall be subject to adjustment as provided in
the Rights Agreement) at any time prior to the earlier of (i) such time as a
Person becomes an Acquiring Person and (ii) the Expiration Date.
<PAGE>

                                                                               3

          The Company may, but shall not be required to, issue fractions of
Preferred Shares or distribute certificates which evidence fractions of
Preferred Shares upon the exercise of any Right or Rights evidenced hereby. In
lieu of issuing fractional shares, the Company may elect to make a cash payment
as provided in the Rights Agreement for fractions of a share other than one ten-
thousandth (1/10,000th) of a share or any integral multiple thereof or to issue
certificates or utilize a depository arrangement as provided in the terms of the
Rights Agreement and the Preferred Shares.

          No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Company which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company, including, without limitation,
any right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in the Rights Agreement), or to receive
dividends or other distributions or subscription rights, or otherwise, until the
Right or Rights evidenced by this Right Certificate shall have been exercised as
provided in accordance with the provisions of the Rights Agreement.

          This Right Certificate shall not be valid or obligatory for any
purpose until it shall have been counter signed by an authorized signatory of
the Rights Agent.
<PAGE>

                                                                               4

          WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.


Dated as of:

                                        CROWN CASTLE INTERNATIONAL CORP.,

                                           by
                                               _____________________________
                                               Name:
                                               Title:

Attest:

_________________________
Name:
Title:


Date of countersignature:

Countersigned:

CHASEMELLON SHAREHOLDER
SERVICES, L.L.C.,
as Rights Agent,

  by
    _____________________
     Authorized Signatory
<PAGE>

                                                                               5

                    [On Reverse Side of Right Certificate]


                         FORM OF ELECTION TO PURCHASE
                         ----------------------------

                  (To be executed by the registered holder if
                  such holder desires to exercise the Rights
                    represented by this Right Certificate.)


To the Rights Agent:

          The undersigned hereby irrevocably elects to exercise __________
Rights represented by this Right Certificate to purchase the Preferred Shares
(or other shares) issuable upon the exercise of such Rights and requests that
certificates for such shares be issued in the name of:

Please insert social security
or other identifying number

________________________________________________________________________________
                        (Please print name and address)

________________________________________________________________________________
<PAGE>

                                                                               6

          If such number of Rights shall not be all the Rights evidenced by this
Right Certificate, a new Right Certificate for the balance remaining of such
Rights shall be registered in the name of and delivered to:

Please insert social security
or other identifying number

________________________________________________________________________________
                        (Please print name and address)

________________________________________________________________________________

Dated:  ___________, 19__


                                             ______________________________
                                             Signature


Signature Guaranteed:
<PAGE>

                                                                               7

                              FORM OF ASSIGNMENT
                              ------------------

               (To be executed by the registered holder if such
              holder desires to transfer the Right Certificate.)

          FOR VALUE RECEIVED _______________________________ hereby sells,
assigns and transfers unto ____________________
________________________________________________________________________________
                 (Please print name and address of transferee)

________________________________________________________________________________

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably constitute and appoint ______________ Attorney, to
transfer the within Right Certificate on the books of the within-named
Corporation, with full power of substitution.

Dated:  ____________, 19__


                                             ______________________________
                                             Signature

Signature Guaranteed:


          The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring Person or an Affiliate or Associate thereof
(as such terms are defined in the Rights Agreement), (2) this Right Certificate
is not being sold, assigned or transferred to or on behalf of any such Acquiring
Person, Affiliate or Associate and (3) after inquiry and to the best knowledge
of the undersigned, the undersigned did not acquire the Rights evidenced by this
Right Certificate from any Person who is or was an Acquiring Person or an
Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement).


                                             ______________________________
                                             Signature
<PAGE>

                                                                               1

                                    NOTICE
                                    ------

          The signature on the foregoing Form of Election to Purchase or Form of
Assignment must correspond to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.


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