COLLABORATIVE CLINICAL RESEARCH INC
8-A12G, 1997-09-19
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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<PAGE>   1


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  ------------

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) OR 12(g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                      Collaborative Clinical Research, Inc.
             (Exact name of registrant as specified in its charter)

             Ohio                                     34-1685364
  ----------------------------                ----------------------------
  (State of Incorporation or                       (I.R.S. Employer
             Organization)                            Identification No.)


       20600 Chagrin Boulevard, Suite 1050, Cleveland, Ohio          44122
  ---------------------------------------------------------    ----------------
         (Address of Principal Executive Offices)                 (Zip Code)

<TABLE>
<S>                                                                        <C>
          If this Form relates to the registration of a                    If this Form relates to the registration of a 
          class of securities pursuant to Section 12(b) of                 class of securities pursuant to Section 12(g) 
          the Exchange Act and is effective pursuant to                    of the Exchange Act and is effective pursuant
          General Instruction A.(c), check the following                   to General Instruction A.(d), check the 
          box.[ ]                                                          following box. [ ]
</TABLE>

Securities Act registration statement file number to which this form relates:
____________ (if applicable)

Securities to be registered pursuant to Section 12(b) of the Act:

          Title of Each Class                   Name of Each Exchange on Which
          to be so Registered                   Each Class is to be Registered

- ------------------------------------     --------------------------------------

- ------------------------------------     ---------------------------------------


Securities to be registered pursuant to Section 12(g) of the Act:

          Series A Junior Participating Preferred Stock Purchase Rights
- --------------------------------------------------------------------------------
                                (Title of Class)


<PAGE>   2


ITEM 1.  DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED.

         On September 2, 1997, the Board of Directors of Collaborative Clinical
Research, Inc. (the "Company") declared a dividend of one Series A Junior
Participating Preferred Stock purchase right (a "Right") for each outstanding
Common Share, without par value (the "Common Shares"), of the Company to
purchase one one-hundredth of a share of a new Series A Junior Participating
Preferred Stock (the "Series A Preferred Stock"). The dividend is payable on
September 15, 1997 (the "Record Date") to the Company's shareholders of record
on that date. Each Right entitles the registered holders the Company's Common
Shares to buy one one-hundredth of a share of Series A Preferred Stock at an
exercise price of $30, subject to adjustment. The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement"), dated
September 2, 1997, between the Company and National City Bank, as Rights Agent
(the "Rights Agent").

         Until the earlier to occur of (i) ten days following a public
announcement that a person, or group of affiliated or associated persons (an
"Acquiring Person") has acquired beneficial ownership of 20% or more of the
Company's outstanding Common Shares or (ii) ten business days (or such later
date as may be determined by action of the Board of Directors prior to such time
as any person becomes an Acquiring Person) following the commencement of, or
announcement of an intention to make, a tender offer or exchange offer the
consummation of which would result in the beneficial ownership by a person or
group of 20% or more of the Company's outstanding Common Shares (the earlier of
such dates being called the "Distribution Date"), the Rights will be evidenced,
with respect to any of the Common Share certificates outstanding as of the
Record Date, by such Common Share certificate.

         The Rights Agreement provides that, until the Distribution Date (or
earlier redemption or expiration of the Rights), the Rights will be transferred
with and only with the Common Shares. Until the Distribution Date (or earlier
redemption or expiration of the Rights), new Common Share certificates issued
after the Record Date, upon transfer or new issuance of Common Shares will
contain a legend incorporating the Rights Agreement by reference. Until the
Distribution Date (or earlier redemption or expiration of the Rights), the
surrender for transfer of any certificates for Common Shares, outstanding as of
the Record Date, even without such legend or a copy of the Summary of Rights
provided to the Company's shareholders on the Records date, will also constitute
the transfer of the Rights associated with the Common Shares represented by such
certificate. As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Stock as of the close of business on the
Distribution Date and such separate Right Certificates alone will evidence the
Rights.

         The Rights are not exercisable until the Distribution Date. The Rights
will expire on the earliest of (i) the close of business on September 15, 2007
(the "Final Expiration Date"), (ii) the time at which the Rights are redeemed or
(iii) the time at which such Rights are exchanged.

         The purchase price payable and the number of shares of Series A
Preferred Stock or other securities or property issuable upon exercise of the
Rights are subject to adjustment from time to time to prevent dilution (i) in
the event of a stock dividend on, or a subdivision, combination or

<PAGE>   3

reclassification of, the Series A Preferred Stock, (ii) upon the grant to
holders of the Series A Preferred Stock of certain rights, options or warrants
to subscribe for or purchase Series A Preferred Stock (or equivalent preferred
shares of the Company) at a price, or securities convertible into Series A
Preferred Stock with a conversion price, less than the then current market price
of the Preferred Stock or (iii) upon the distribution to holders of the Series A
Preferred Stock of evidences of indebtedness or assets (excluding regular
periodic cash dividends paid out of earnings or retained earnings or dividends
payable in Series A Preferred Stock) or of subscription rights or warrants
(other than those referred to above).

         The purchase price payable, the number of outstanding Rights and the
number of one one-hundredths of Series A Preferred Stock issuable upon exercise
of each Right are also subject to adjustment in the event of a stock split of
the Common Shares or a stock dividend on the Common Shares payable in Common
Shares or subdivisions, consolidations or combinations of the Common Shares
occurring, in any such case, prior to the Distribution Date.

         Series A Preferred Stock purchasable upon exercise of the Rights will
not be redeemable and will rank junior to any other series of the Company's
preferred shares. Each whole share of Series A Preferred Stock will be entitled
to a minimum preferential quarterly dividend payment of $1.00 per share but will
be entitled to an aggregate dividend of 100 times the dividend declared on the
Common Shares. In the event of liquidation, the holders of the new Series A
Preferred Stock will be entitled to a minimum preferential liquidation payment
of $100 per share but will be entitled to an aggregate payment of 100 times the
payment made per Common Share. Each share of Series A Preferred Stock will have
1 vote, voting together with the Common Shares. Finally, in the event of any
merger, consolidation or other transaction in which the Common Shares are
exchanged for or changed into other stock or securities, cash and/or other
property, each share of Series A Preferred Stock will be entitled to receive 100
times the amount received per Common Share. These rights are protected by
customary anti-dilution provisions.

         Because of the nature of the Series A Preferred Stock dividend and
liquidation rights, the value of the one one-hundredth interest in a share of
Preferred Stock purchasable upon exercise of each Right should approximate the
value of one share of Common Stock.

         In the event that the Company is acquired in a merger or other business
combination transaction or 50% or more of its consolidated assets or earning
power are sold, proper provision will be made so that each holder of a Right
will thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction will have a market
value of two times the exercise price of the Right. In the event that any person
or group of affiliated or associated persons becomes an Acquiring Person, proper
provision shall be made so that each holder of a Right, other than Rights
beneficially owned by the Acquiring Person (which will thereafter be void), will
thereafter have the right to receive upon exercise that number of Common Shares
having a market value of two times the exercise price of the Right.

         At any time after a person or group becomes an Acquiring Person and
prior to the acquisition by such person or group of 50% or more of the
then-outstanding Common Shares, the 

<PAGE>   4

Board of Directors of the Company may exchange the Rights (other than Rights
owned by such person or group which have become void), in whole or in part, at
an exchange ratio of one Common Share or one one-hundredth of a share of Series
A Preferred Stock (or of a share of a class or series of the Company's preferred
shares having equivalent rights, preferences and privileges), per Right (subject
to adjustment).

         With certain exceptions, no adjustment in the purchase price will be
required until cumulative adjustments require an adjustment of at least 1% in
such purchase price. No fractional shares of Series A Preferred Stock will be
issued (other than fractions which are integral multiples of one one-hundredth
of a share of Series A Preferred Stock, which may, at the election of the
Company, be evidenced by depositary receipts) and in lieu thereof, an adjustment
in cash will be made based on the market price of the Series A Preferred Stock
on the last trading day prior to the date of exercise.

         At any time prior to the acquisition by a person or group of affiliated
or associated persons of beneficial ownership of 20% or more of the
then-outstanding Common Shares, the Board of Directors of the Company may redeem
the Rights in whole, but not in part, at a price of $.01 per Right (the
"Redemption Price"). The redemption of the rights may be made effective at such
time on such basis and with such conditions as the Board of Directors in its
sole discretion may establish. Immediately upon any redemption of the Rights,
the right to exercise the Rights will terminate and the only right of the
holders of Rights will be to receive the Redemption Price.

         The terms of the Rights may be amended by the Board of Directors of the
Company without the consent of the holders of the Rights, except that from and
after such time as any person becomes an Acquiring Person no such amendment may
adversely affect the interests of the holders of the Rights. The Board of
Directors of the Company may lower the 20% beneficial ownership thresholds,
applied for the purpose of determining the Distribution Date, to no less than
the greater of (i) 10% or (ii) the sum .001% and the largest percentage of
outstanding Common Shares of the Company known by the Company to be beneficially
owned by any person (other than the Company, any subsidiary of the Company, any
employee benefit plan of the Company or subsidiary of the Company, or any entity
holding Common Shares for or pursuant to the terms of any such plan).

         Until a Right is exercised, the holder thereof, as such, will have no
rights as a shareholder of the Company, including, without limitation, the right
to vote or to receive dividends.

         As of September 15, 1994 the Company had a total of 6,402,914 Common
Shares outstanding. As of September 15, 1997, the Company had a total of 497,083
Common Shares issuable upon exercise of outstanding stock options. Each
outstanding Common Share will receive one Right. The Company has a total of
1,000,000 shares of Serial Preferred Shares authorized of which no shares are
outstanding. There has been reserved for issuance 500,000 shares of Serial A
Preferred Stock of the Company issuable upon exercise of the Rights.


<PAGE>   5


ITEM 2.  EXHIBITS.

         The following exhibit is filed as a part of this Registration
         Statement:

         1.       Rights Agreement, dated September 2, 1997, by and between the
                  Company and National City Bank, as Rights Agent, which
                  includes the Certificate of Designations as Exhibit A, the
                  Form of Rights Certificate as Exhibit B and the Summary of
                  Rights as Exhibit C.


<PAGE>   6


                                    SIGNATURE

                  Pursuant to the requirements of Section 12 of the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement
to be signed on its behalf by the undersigned, thereto duly authorized.

                                          COLLABORATIVE CLINICAL RESEARCH, INC.

                                                   (Registrant)

Date:  September 15, 1997                   By:     /s/  Terry C. Black
                                                 ------------------------------
                                            Terry C. Black,
                                            Vice President of Finance, Chief
                                            Financial Officer, Treasurer and
                                            Assistant Secretary


<PAGE>   7



                                  EXHIBIT INDEX
                                  -------------

     Exhibit No.                                               Document Name
     -----------                                               -------------

         1        Rights Agreement, dated September 2, 1997, by and between the
                  Company and National City Bank, as Rights Agent, which
                  includes the Certificate of Designations as Exhibit A, the
                  Form of Rights Certificate as Exhibit B and the Summary of
                  Rights as Exhibit C.



<PAGE>   1
                                                                       Exhibit 1

- --------------------------------------------------------------------------------


                      COLLABORATIVE CLINICAL RESEARCH, INC.

                                       and

                               NATIONAL CITY BANK,

                                 as Rights Agent

                                Rights Agreement

                          Dated as of September 2, 1997

- --------------------------------------------------------------------------------



<PAGE>   2


                                TABLE OF CONTENTS

                                                                          PAGE

Section 1.  Certain Definitions...............................................1

Section 2.  Appointment of Rights Agent.......................................5

Section 3.  Issue of Right Certificates.......................................5

Section 4.  Form of Right Certificates........................................7

Section 5.  Countersignature and Registration.................................8

Section 6. Transfer,  Split Up,  Combination  and Exchange of Right 
         Certificates;  Mutilated,  Destroyed, Lost or Stolen Right 
         Certificates.........................................................9

Section 7.  Exercise of Rights; Purchase Price: Expiration Date of Rights....10

Section 8.  Cancellation and Destruction of Right Certificates...............12

Section 9.  Availability of Preferred Shares.................................12

Section 10.  Preferred Shares Record Date....................................13

Section 11.  Adjustment of Purchase Price, Number of Shares or 
         Number of Rights....................................................14

Section 12.  Certificate of Adjusted Purchase Price or Number of Shares......24

Section 13.  Consolidation, Merger or Sale or Transfer of Assets or 
         Earning Power........................................................25

Section 14.  Fractional Rights and Fractional Shares.........................26


<PAGE>   3

Section 15.  Rights of Action................................................28

Section 16.  Agreement of Right Holders......................................29

Section 17.  Right Certificate Holder Not Deemed a Shareholder...............29

Section 18.  Concerning the Rights Agent.....................................30

Section 19.  Merger or Consolidation or Change of Name of Rights Agent.......31

Section 20.  Duties of Rights Agent..........................................32

Section 21.  Change of Rights Agent..........................................34

Section 22.  Issuance of New Right Certificates..............................36

Section 23.  Redemption......................................................36

Section 24.  Exchange........................................................37

Section 25.  Notice of Certain Events........................................39

Section 26.  Notices.........................................................40

Section 27.  Supplements and Amendments......................................41

Section 28.  Successors......................................................42

Section 29.  Benefits of this Agreement......................................42

Section 30.  Severability....................................................42

Section 31.  Governing Law...................................................43

                                      (ii)
<PAGE>   4

Section 32.  Counterparts....................................................43

Section 33.  Descriptive Headings............................................43




                                     (iii)
<PAGE>   5



         Agreement, dated as of September 2, 1997, between Collaborative
Clinical Research, Inc., an Ohio corporation (the "Company"), and National City
Bank (the "Rights Agent").


         The Board of Directors of the Company (the "Board") has authorized and
declared a dividend of one preferred share purchase right (a "Right") for each
Common Share (as hereinafter defined) of the Company outstanding on September
15, 1997 (the "Record Date"). Each Right represents the right to purchase one
one-hundredth of a Preferred Share (as hereinafter defined), upon the terms and
subject to the conditions herein set forth. The Board has further authorized and
directed the issuance of one Right with respect to each Common Share that
becomes outstanding between the Record Date and the earliest of the Distribution
Date, the Redemption Date and the Final Expiration Date (in each case, as
hereinafter defined).

         Accordingly, 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 Agreement, the
following terms have the meanings indicated: 

         (a) "Acquiring Person" means any Person (as hereinafter defined) who or
which, together with all Affiliates and Associates (in each case, as hereinafter
defined) of such Person, shall be the Beneficial Owner (as hereinafter defined)
of 20% or more of the Common Shares of the Company then outstanding, but does
not include the Company, any Subsidiary (as hereinafter defined) of the Company,
any employee benefit plan of the Company or any Subsidiary of the Company, or
any entity holding Common Shares for or pursuant to the terms of any such plan.
Notwithstanding anything in the preceding sentence, no Person will become an
Acquiring Person as the result of an acquisition of Common Shares or other
transaction by the 


<PAGE>   6

Company that reduces the number of Common Shares outstanding and, therefore
increases the aggregate percentage of Common Shares beneficially owned by such
Person to 20% or more of the Common Shares outstanding after the transaction by
the Company. However, if the Person referred to in the preceding sentence later
becomes the Beneficial Owner of additional Common Shares, then such Person will
be an Acquiring Person. Upon (a) a determination by the Board in good faith that
such Person inadvertently became the Beneficial Owner of the additional Common
Shares and (b) the divestiture as promptly as possible by such Person of a
sufficient number of Common Shares so that such Person would no longer be an
Acquiring Person pursuant to the first sentence of this section 1(a), then such
Person will not be an Acquiring Person for any purpose under this Agreement.

         (b) "Affiliate" and "Associate" have the respective meanings ascribed
to such terms in Rule 12b-2 of the General Rules and Regulations under the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), as in effect
on the date of this Agreement.

         (c) A Person is deemed the "Beneficial Owner" of and is deemed to
"beneficially own" any securities: 

              (i) which such Person or any of such Person's Affiliates or
Associates beneficially owns, directly or indirectly; 

              (ii) which such Person or any of such Person's Affiliates or
Associates has (A) the right to acquire (whether such right is exercisable
immediately or only after the passage of time) pursuant to any agreement,
arrangement or understanding (other than customary agreements with and between
underwriters and selling group members with respect to a bona fide public
offering of securities), or upon the exercise of conversion rights, exchange
rights, rights (other than these Rights), warrants or options, or otherwise;
PROVIDED, HOWEVER, that



                                      (2)
<PAGE>   7

a Person is not deemed the Beneficial Owner of, or to beneficially own,
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; or (B) the right to
vote pursuant to any agreement, arrangement or understanding; PROVIDED, HOWEVER,
that a Person is not deemed the Beneficial Owner of, or to beneficially own, any
security if the agreement, arrangement or understanding to vote such security
(1) arises solely from a revocable proxy or consent given to such Person in
response to a public proxy or consent solicitation made pursuant to, and in
accordance with, the applicable rules and regulations promulgated under the
Exchange Act and (2) is not also then reportable on Schedule 13D under the
Exchange Act (or any comparable or successor report); or

              (iii) 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 (other than customary
agreements with and between underwriters and selling group members with respect
to a bona fide public offering of securities) for the purpose of acquiring,
holding, voting (except to the extent contemplated by the proviso to Section
1(c)(ii)(B)) or disposing of any securities of the Company.

         Notwithstanding anything in this definition of Beneficial Ownership to
the contrary, the phrase "then outstanding," when used with reference to a
Person's Beneficial Ownership of securities of the Company, means the number of
such securities then issued and outstanding together with the number of such
securities not then actually issued and outstanding which such Person would be
deemed to own beneficially hereunder.

                                      (3)
<PAGE>   8

         (d) "Business Day" means any day other than a Saturday, a Sunday, or a
day on which banking institutions in the State of Ohio are authorized or
obligated by law or executive order to close.

         (e) "Close of business" on any given date means 5:00 P.M., Cleveland,
Ohio time, on such date; PROVIDED, HOWEVER, that if such date is not a Business
Day, close of business means 5:00 P.M., Cleveland, Ohio time, on the next
succeeding Business Day.

         (f) "Common Shares" when used with reference to the Company means the
shares of common stock, without par value, of the Company. "Common Shares" when
used with reference to any Person other than the Company means the capital stock
(or equity interest) with the greatest voting power of such other Person or, if
such other Person is a Subsidiary of another Person, the Person or Persons which
ultimately control such first-mentioned Person.

         (g) "Distribution Date" has the meaning set forth in Section 3 hereof.

         (h) "Final Expiration Date" has the meaning set forth in Section 7
hereof.

         (i) "Person" means any individual, firm, corporation or other entity,
and shall include any successor (by merger or otherwise) of such entity.

         (j) "Preferred Shares" means shares of Series A Junior Participating
Preferred Stock, without par value, of the Company having the rights and
preferences set forth in the Form of Certificate of Designations attached to
this Agreement as Exhibit A.

         (k) "Redemption Date" has the meaning set forth in Section 7 hereof.

         (l) "Shares Acquisition Date" means the first date of public
announcement by the Company or an Acquiring Person that an Acquiring Person has
become such.

                                      (4)
<PAGE>   9

         (m) "Subsidiary" of any Person means any corporation or other entity of
which a majority of the voting power of the voting equity securities or equity
interest is owned, directly or indirectly, by such Person.

         Section 2. APPOINTMENT OF RIGHTS AGENT. The Company hereby appoints the
Rights Agent to act as agent for the Company and the holders of the Rights (who,
in accordance with Section 3 hereof, are also the holders of the Common Shares
prior to the Distribution Date) in accordance with the terms and conditions
hereof, and the Rights Agent hereby accepts such appointment. The Company may
from time to time appoint such co-Rights Agents as it deems necessary or
desirable.

         Section 3. ISSUE OF RIGHT CERTIFICATES. (a) Until the earlier of (i)
the tenth day after the Shares Acquisition Date or (ii) the tenth business day
(or such later date as may be determined by action of the Board prior to such
time as any Person becomes an Acquiring Person) after the date of the
commencement by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any Subsidiary of the
Company or any entity holding Common Shares for or pursuant to the terms of any
such plan) of, or of the first public announcement of the intention of any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or of any Subsidiary of the Company or any entity
holding Common Shares for or pursuant to the terms of any such plan) to
commence, a tender or exchange offer the consummation of which would result in
any Person becoming the Beneficial Owner of Common Shares aggregating 20% or
more of the then outstanding Common Shares (including any such date that is
after the date of this Agreement and prior to the issuance of the Rights, the
earlier of such dates being herein referred to as the "Distribution Date"), (x)
the Rights will be evidenced (subject to the provisions of


                                      (5)
<PAGE>   10

Section 3(b) hereof) by the certificates for Common Shares registered in the
names of the holders thereof (which certificates shall also be deemed to be
Right Certificates) and not by separate Right Certificates, and (y) the right to
receive Right Certificates will be transferable only in connection with the
transfer of Common Shares. As soon as practicable after the Distribution Date,
the Company shall prepare and execute, the Rights Agent shall countersign, and
the Company shall send or cause to be sent (and the Rights Agent shall, if
requested, send) by first-class, insured, postage-prepaid mail, to each record
holder of Common Shares as of the close of business on the Distribution Date, at
the address of such holder shown on the records of the Company, a Right
Certificate, in substantially the form of Exhibit B hereto (a "Right
Certificate"), evidencing one Right for each Common Share so held. As of the
Distribution Date, the Rights will be evidenced solely by such Right
Certificates.

         (b) On the Record Date, or as soon as practicable thereafter, the
Company shall send a copy of a Summary of Rights to Purchase Preferred Shares,
in substantially the form of Exhibit C hereto (the "Summary of Rights"), by
first-class, postage-prepaid mail, to each record holder of Common Shares as of
the close of business on the Record Date, at the address of such holder shown on
the records of the Company. With respect to certificates for Common Shares
outstanding as of the Record Date, the Rights will be evidenced until the
Distribution Date by such certificates registered in the names of the holders
thereof together with a copy of the Summary of Rights attached thereto. Until
the Distribution Date (or the earlier of the Redemption Date or the Final
Expiration Date), the surrender for transfer of any certificate for Common
Shares outstanding on the Record Date, with or without a copy of the Summary of
Rights attached thereto, shall also constitute the transfer of the Rights
associated with the Common Shares represented thereby.

                                      (6)
<PAGE>   11

         (c) Certificates for Common Shares which become outstanding (including,
without limitation, reacquired Common Shares referred to in the last sentence of
this paragraph (c)) after the Record Date but prior to the earliest of the
Distribution Date, the Redemption Date or the Final Expiration Date will have
impressed on, 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 between Collaborative
         Clinical Research, Inc. and National City Bank dated as of September 2,
         1997 (the "Rights Agreement"), the terms of which are hereby
         incorporated herein by reference and a copy of which is on file at the
         principal executive offices of Collaborative Clinical Research, Inc.
         Under certain circumstances, as set forth in the Rights Agreement, such
         Rights will be evidenced by separate certificates and will no longer be
         evidenced by this certificate. Collaborative Clinical Research, Inc.
         will mail to the holder of this certificate a copy of the Rights
         Agreement without charge after receipt of a written request therefor.
         Under certain circumstances, as set forth in the Rights Agreement,
         Rights issued to any Person who becomes an Acquiring Person (as defined
         in the Rights Agreement) may become null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates are evidenced by such certificates alone, and the surrender
for transfer of any such certificate also constitutes the transfer of the Rights
associated with the Common Shares represented thereby. In the event that the
Company purchases or acquires any Common Shares after the Record Date but prior
to the Distribution Date, any Rights associated with such Common Shares will be
deemed cancelled and retired so that the Company would not be entitled to
exercise any Rights associated with the Common Shares that were no longer
outstanding.

         Section 4. FORM OF RIGHT CERTIFICATES. The Right Certificates (and the
forms of election to purchase Preferred Shares and of assignment to be printed
on the reverse thereof) will be substantially the same as Exhibit B hereto and
may have such marks of identification or 


                                      (7)
<PAGE>   12

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 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 Section 22 hereof, the Right
Certificates entitle the holders thereof to purchase such number of one
one-hundredths of a Preferred Share as are set forth therein at the price per
one one-hundredth of a Preferred Share set forth therein (the "Purchase Price"),
but the number of such one one-hundredths of a Preferred Share and the Purchase
Price will be subject to adjustment as provided herein.

         Section 5. COUNTERSIGNATURE AND REGISTRATION. The Company shall cause
the Right Certificates to be (i) executed on its behalf by its Chairman of the
Board, its Chief Executive Officer, its President, any of its Vice Presidents,
or its Treasurer, either manually or by facsimile signature, (ii) affixed with
the Company seal or a facsimile thereof, and (iii) attested by the Secretary or
an Assistant Secretary of the Company, either manually or by facsimile
signature. The Rights Agent shall manually countersign the Right Certificate,
which is not valid for any purpose unless so countersigned. In case any officer
of the Company who has signed any of the Right Certificates ceases to be such
officer of the Company before countersignature by the Rights Agent and issuance
and delivery by the Company, such Right Certificates, nevertheless, may 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 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 the execution of such Right Certificate, would 


                                      (8)
<PAGE>   13

be a proper officer of the Company to sign such Right Certificate, although at
the date of the execution of this Rights Agreement any such person was not such
an officer.

         Following the Distribution Date, the Rights Agent shall keep or cause
to be kept, at its principal office, books for registration and transfer of the
Right Certificates issued hereunder. Such books will show the names and
addresses of the respective holders of the Right Certificates, the number of
Rights evidenced on its face by 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. Subject
to the provisions of Section 14 hereof, at any time after the close of business
on the Distribution Date, and at or prior to the close of business on the
earlier of the Redemption Date or the Final Expiration Date, any Right
Certificate or Right Certificates (other than Right Certificates representing
Rights that have become void pursuant to Section 11(a)(ii) hereof or that have
been exchanged pursuant to Section 24 hereof) may be transferred, split up,
combined or exchanged for another Right Certificate or Right Certificates,
entitling the registered holder to purchase a like number of one one-hundredths
of a Preferred Share as the Right Certificate or Right Certificates surrendered
then entitled such holder to purchase. Any registered holder desiring to
transfer, split up, combine or exchange any Right Certificate or Right
Certificates 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. Thereupon the Rights Agent shall 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 



                                      (9)
<PAGE>   14

may be imposed in connection with any transfer, split up, combination or
exchange of Right Certificates.

         Upon receipt by the Company and the Rights Agent of evidence reasonably
satisfactory to them of the loss, theft, destruction or mutilation of a Right
Certificate, and, in the 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 cancellation of
the Right Certificate if mutilated, the Company will make and deliver a new
Right Certificate of like tenor to the Rights Agent for delivery to the
registered holder in lieu of the Right Certificate so lost, stolen, destroyed or
mutilated.

         Section 7. EXERCISE OF RIGHTS; PURCHASE PRICE: EXPIRATION DATE OF
RIGHTS. (a) The registered holder of any Right Certificate may exercise the
Rights evidenced thereby (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,
together with payment of the Purchase Price for each one one-hundredth of a
Preferred Share as to which the Rights are exercised, at or prior to the
earliest of (i) the close of business on September 2, 2007 (the "Final
Expiration Date"), (ii) the time at which the Rights are redeemed as provided in
Section 23 hereof (the "Redemption Date"), or (iii) the time at which such
Rights are exchanged as provided in Section 24 hereof.

         (b) The Purchase Price for each one one-hundredth of a Preferred Share
purchasable pursuant to the exercise of a Right is initially $30, subject to
adjustment from 


                                      (10)
<PAGE>   15

time to time as provided in Section 11 or 13 hereof, and is payable in lawful
money of the United States of America in accordance with paragraph (c) below.

         (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 shares to be purchased and an amount equal
to any applicable transfer tax required to be paid by the holder of such Right
Certificate in accordance with Section 9 hereof by certified check, cashier's
check or money order payable to the order of the Company, the Rights Agent shall
thereupon promptly (i) (A) requisition from any transfer agent of the Preferred
Shares 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) requisition from the depositary agent depositary receipts
representing such number of one one-hundredths of a Preferred Share as are to be
purchased (in which case certificates for the Preferred Shares represented by
such receipts shall be deposited by the transfer agent with the depositary
agent) and the Company hereby directs the depositary agent to comply with such
request, (ii) when appropriate, requisition from the Company the amount of cash
to be paid in lieu of issuance of fractional shares in accordance with Section
14 hereof, (iii) 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, 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 less than all the Rights evidenced thereby, the Rights Agent shall
issue a new Right Certificate evidencing Rights equivalent to the Rights
remaining unexercised to the registered holder of such 


                                      (11)
<PAGE>   16

Right Certificate or to the holder's duly authorized assigns, subject to the
provisions of Section 14 hereof.

         Section 8. CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES. The
Company shall deliver all Right Certificates surrendered to the Company or to
any of its agents for the purpose of exercise, transfer, split up, combination
or exchange for cancellation or in cancelled form to the Rights Agent. The
Rights Agent shall cancel (i) all such Right Certificates delivered to it by the
Company and (ii) all Right Certificates surrendered to the Rights Agent for the
purposes enumerated in the preceding sentence; no Right Certificate may be
issued in lieu thereof except as expressly permitted by of this Rights
Agreement. The Company shall deliver to the Rights Agent for cancellation and
retirement, and the Rights Agent shall so cancel and retire, any other Right
Certificate purchased or acquired by the Company otherwise than upon the
exercise thereof. The Rights Agent shall deliver all cancelled Right
Certificates to the Company, or shall, at the written request of the Company,
destroy such cancelled Right Certificates, and in such case shall deliver a
certificate of destruction thereof to the Company.

         Section 9. AVAILABILITY OF PREFERRED SHARES. The Company covenants and
agrees that it will cause to be reserved and kept available out of its
authorized and unissued Preferred Shares or any Preferred Shares held in its
treasury, the number of Preferred Shares that will be sufficient to permit the
exercise in full of all outstanding Rights in accordance with Section 7. The
Company covenants and agrees that it will take all such action as may be
necessary to ensure that all Preferred Shares delivered upon exercise 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.

                                      (12)
<PAGE>   17

         The Company further covenants and agrees that it will 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 the Right Certificates or of
any Preferred Shares upon the exercise of Rights. The Company is not, however,
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 the issuance or
delivery of certificates or depositary receipts for the Preferred Shares in a
name other than that of, the registered holder of the Right Certificate
evidencing Rights surrendered for exercise or to issue or to deliver any
certificates or depositary receipts for Preferred Shares upon the exercise 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 reasonable satisfaction that no such tax
is due.

         Section 10. PREFERRED SHARES RECORD DATE. Each person in whose name any
certificate for Preferred Shares is issued upon the exercise of Rights will be
deemed for all purposes to have become the holder of record of the Preferred
Shares represented thereby on, and such certificate shall be dated, the date
upon which the Right Certificate evidencing such Rights was duly surrendered and
payment of the 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 Preferred Shares transfer books of the Company are closed, such person
will be deemed to have become the record holder of such shares on, and such
certificate shall be dated, the next succeeding Business Day on which the
Preferred Shares transfer books of the Company are open. Prior to the exercise
of the Rights evidenced thereby, the holder of a Right Certificate will not be
entitled to any rights of a holder of Preferred Shares for which the Rights are
exercisable, including, without limitation, the right to vote, to receive
dividends or other distributions or to 

                                      (13)
<PAGE>   18

exercise any preemptive rights, and will not be entitled to receive any notice
of any proceedings of the Company, except as provided herein.

         Section 11. ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF
RIGHTS. The Purchase Price, the number of Preferred Shares covered by each Right
and the number of Rights outstanding are subject to adjustment from time to time
as provided in this Section 11.

         (a)  (i) If at any time after the date of this Agreement, the Company
(A) declares a dividend on the Preferred Shares payable in Preferred Shares, (B)
subdivides the outstanding Preferred Shares, (C) combines the outstanding
Preferred Shares into a smaller number of Preferred Shares, or (D) issues any
shares of its capital stock in a reclassification of the Preferred Shares
(including any such reclassification in connection with a consolidation or
merger in which the Company is the continuing or surviving corporation), except
as otherwise provided in this Section 11(a), the Company shall proportionately
adjust the Purchase Price in effect at the time of the record date for such
dividend or of the effective date of such subdivision, combination or
reclassification, and the number and kind of shares of capital stock issuable on
such date, so that the holder of any Right exercised after such time will be
entitled to receive the aggregate number and kind of shares of capital stock
that the holder would have owned upon such exercise and been entitled to receive
by virtue of such dividend, subdivision, combination or reclassification if such
Right had been exercised immediately prior to such date and at a time when the
Preferred Shares transfer books of the Company were open; PROVIDED, HOWEVER,
that in no event will the consideration to be paid upon the exercise of one
Right be less than the aggregate par value of the shares of capital stock of the
Company issuable upon exercise of one Right.

                                      (14)
<PAGE>   19

         (ii) Subject to Section 24 of this Agreement, in the event any Person
becomes an Acquiring Person, each holder of a Right will thereafter have a right
to receive, upon exercise thereof at a price equal to the then current Purchase
Price multiplied by the number of one one-hundredths of a Preferred Share for
which a Right is then exercisable, in accordance with the terms of this
Agreement and in lieu of Preferred Shares, such number of Common Shares of the
Company as then equal the result obtained by (x) multiplying the then current
Purchase Price by the number of one one-hundredths of a Preferred Share for
which a Right is then exercisable and dividing that product by (y) 50% of the
then current per share market price of the Company's Common Shares (determined
pursuant to Section 11(d) hereof) on the date of the occurrence of such event.
In the event that any Person becomes an Acquiring Person and the Rights are then
outstanding, the Company shall not take any action which would eliminate or
diminish the benefits intended to be afforded by the Rights.

         From and after the occurrence of such event, any Rights that are or
were acquired or beneficially owned by any Acquiring Person (or any Associate or
Affiliate of such Acquiring Person) will be void and no holder of such Rights
will thereafter have any right to exercise such Rights under any provision of
this Agreement. No Right Certificate will be issued pursuant to Section 3 that
represents Rights beneficially owned by an Acquiring Person whose Rights would
be void pursuant to the preceding sentence or any Associate or Affiliate
thereof; no Right Certificate will be issued at any time upon the transfer of
any Rights to an Acquiring Person whose Rights would be void pursuant to the
preceding sentence or any Associate or Affiliate thereof or to any nominee of
such Acquiring Person, Associate or Affiliate; and any Right Certificate
delivered to the Rights Agent for transfer to an Acquiring Person whose Rights
would be void pursuant to the preceding sentence will be cancelled.

                                      (15)
<PAGE>   20

         (iii) In the event that there are not sufficient Common Shares issued
but not outstanding or authorized but unissued to permit the exercise in full of
the Rights in accordance with the foregoing subparagraph (ii), the Company shall
take all such action as may be necessary to authorize additional Common Shares
for issuance upon exercise of the Rights. In the event the Company, is unable
after good faith effort, to take all such action as may be necessary to
authorize such additional Common Shares, the Company shall substitute, for each
Common Share that would otherwise be issuable upon exercise of a Right, a number
of Preferred Shares or fraction thereof such that the current per share market
price of one Preferred Share multiplied by such number or fraction is equal to
the current per share market price of one Common Share as of the date of
issuance of such Preferred Shares or fraction thereof.

         (b) In case the Company fixed a record date for the issuance of rights,
options or warrants to all holders of Preferred Shares entitling them (for a
period expiring within 45 calendar days after such record date) to subscribe for
or purchase Preferred Shares (or shares having the same rights, privileges and
preferences as the Preferred Shares ("equivalent preferred shares")) or
securities convertible into Preferred Shares or equivalent preferred shares at a
price per Preferred Share or equivalent preferred share (or having a conversion
price per share, if a security convertible into Preferred Shares or equivalent
preferred shares) less than the then current per share market price of the
Preferred Shares (as defined in Section 11(d)) on such record date, the Purchase
Price to be in effect after such record date will be determined by multiplying
the Purchase Price in effect immediately prior to such record date by a
fraction, the numerator of which is the number of Preferred Shares outstanding
on such record date plus the number of Preferred Shares which the aggregate
offering price of the total number of Preferred Shares and/or equivalent
preferred shares so to be offered (and/or the aggregate initial conversion 


                                      (16)
<PAGE>   21

price of the convertible securities so to be offered) would purchase at such
current market price and the denominator of which is the number of Preferred
Shares outstanding on such record date plus the number of additional Preferred
Shares and/or equivalent preferred shares to be offered for subscription or
purchase (or into which the convertible securities so to be offered are
initially convertible); PROVIDED, however, that in no event will the
consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Company issuable upon
exercise of one Right. In case such subscription price may be paid in a
consideration part or all of which is in a form other than cash, the value of
such consideration shall be as determined in good faith by the Board, whose
determination shall be described in a statement filed with the Rights Agent.
Preferred Shares owned by or held for the account of the Company will not be
deemed outstanding for the purpose of any such computation. Such adjustment will
be made successively whenever such a record date is fixed; and in the event that
such rights, options or warrants are not so issued, the Company shall adjust the
Purchase Price to be the Purchase Price which would then be in effect if such
record date had not been fixed.

         (c) In case the Company fixes a record date for the making of a
distribution to all holders of the Preferred Shares (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription rights or warrants (excluding those referred
to in Section 11(b) hereof), the Purchase Price to be in effect after such
record date will be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which is
the then current per share market price of the Preferred Shares on such record
date, less the fair market value (as determined in good faith by the Board,
whose 




                                      (17)
<PAGE>   22

determination shall be described in a statement filed with the Rights Agent) of
the portion of the assets or evidences of indebtedness so to be distributed or
of such subscription rights or warrants applicable to one Preferred Share and
the denominator of which is such current per share market price of the Preferred
Shares; PROVIDED, HOWEVER, that in no event will the consideration to be paid
upon the exercise of one Right be less than the aggregate par value of the
shares of capital stock of the Company to be issued upon exercise of one Right.
Such adjustments will be made successively whenever such a record date is fixed;
and in the event that such distribution is not so made, the Company shall again
adjust the Purchase Price to be the Purchase Price which would then be in effect
if such record date had not been fixed.

         (d) (i) For the purpose of any computation hereunder, the "current per
share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date means the average of the daily closing prices per
share of such Security for the 30 consecutive Trading Days (as such term is
hereinafter defined) immediately prior to such date; PROVIDED, HOWEVER, that in
the event that the current per share market price of the Security is determined
during a period following the announcement by the issuer of such Security of (A)
a dividend or distribution on such Security payable in shares of such Security
or securities convertible into such shares, or (B) any subdivision, combination
or reclassification of such Security and prior to the expiration of 30 Trading
Days after the ex-dividend date for such dividend or distribution, or the record
date for such subdivision, combination or reclassification, then, and in each
such case, the current per share market price will be appropriately adjusted to
reflect the current market price per share equivalent of such Security. The
closing price for each day means the last sale price, regular way, or, in case
no such sale takes place on such day, the average of the closing bid and asked
prices, regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed or admitted to
trading on the New York Stock Exchange or, if the Security is not listed or
admitted to trading on the New York Stock Exchange, as reported in the principal
consolidated transaction


                                      (18)
<PAGE>   23

reporting system with respect to securities listed on the principal national
securities exchange on which the Security is listed or admitted to trading or,
if the Security is not listed or admitted to trading on any national securities
exchange, the last quoted price or, if not so quoted, the average of the high
bid and low asked prices in the over-the-counter market, as reported by the
National Association of Securities Dealers, Inc. Automated Quotations System
("NASDAQ") or such other system then in use, or, if on any such date the
Security is not quoted by any such organization, the average of the closing bid
and asked prices as furnished by a professional market maker making a market in
the Security selected by the Board. The term "Trading Day" means a day on which
the principal national securities exchange on which the Security is listed or
admitted to trading is open for the transaction of business or, if the Security
is not listed or admitted to trading on any national securities exchange, a
Business Day.

         (ii) For the purpose of any computation hereunder, the "current per
share market price" of the Preferred Shares will be determined in accordance
with the method set forth in Section 11(d)(i). If the Preferred Shares are not
publicly traded, the "current per share market price" of the Preferred Shares
will be conclusively deemed to be the current per share market price of the
Common Shares as determined pursuant to Section 11(d)(i) (appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof), multiplied by one hundred. If neither the Common Shares
nor the Preferred Shares are publicly held or so listed or traded, "current per
 share market price" means the fair value per


                                      (19)
<PAGE>   24

share as determined in good faith by the Board, whose determination shall be
described in a statement filed with the Rights Agent.

         
         (e) No adjustment in the Purchase Price will be required unless such
adjustment would require an increase or decrease of at least 1% in the Purchase
Price; PROVIDED, HOWEVER, that any adjustments which by reason of this Section
11(e) are not required to be made will be carried forward and taken into account
in any subsequent adjustment. All calculations under this Section 11 will be
made to the nearest cent or to the nearest one one-millionth of a Preferred
Share or one ten-thousandth of any other share or security as the case may be.
Notwithstanding the first sentence of this Section 11(e), any adjustment
required by this Section 11 will be made no later than the earlier of (i) three
years from the date of the transaction which requires such adjustment or (ii)
the date of the expiration of the right to exercise any Rights.

         (f) If as a result of an adjustment made pursuant to Section 11(a)
hereof, the holder of any Right thereafter exercised becomes entitled to receive
any shares of capital stock of the Company other than Preferred Shares,
thereafter the number of such other shares so receivable upon exercise of any
Right will be subject to adjustment from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions with respect to the
Preferred Shares contained in Section 11(a) through (c), inclusive, and the
provisions of Sections 7, 9, 10 and 13 with respect to the Preferred Shares will
apply on like terms to any such other shares.

         (g) All Rights originally issued by the Company subsequent to any
adjustment made to the Purchase Price hereunder will evidence the right to
purchase, at the adjusted 


                                      (20)
<PAGE>   25

Purchase Price, the number of one one-hundredths of a Preferred Share
purchasable from time to time hereunder upon exercise of the Rights, all subject
to further adjustment as provided herein.

         (h) Unless the Company has exercised its election as provided in
Section 11(i), upon each adjustment of the Purchase Price as a result of the
calculations made in Sections 11(b) and (c), each Right outstanding immediately
prior to the making of such adjustment will thereafter evidence the right to
purchase, at the adjusted Purchase Price, that number of one one-hundredths of a
Preferred Share (calculated to the nearest one one-millionth of a Preferred
Share) obtained by (i) multiplying (x) the number of one one-hundredths of a
share covered by a Right immediately prior to this adjustment by (y) the
Purchase Price in effect immediately prior to such adjustment of the Purchase
Price and (ii) dividing the product so obtained by the Purchase Price in effect
immediately after such adjustment of the Purchase Price.

         (i) The Company may elect on or after the date of any adjustment of the
Purchase Price to adjust the number of Rights, in substitution for any
adjustment in the number of one one-hundredths of a Preferred Share purchasable
upon the exercise of a Right. Each of the Rights outstanding after such
adjustment of the number of Rights will be exercisable for the number of one
one-hundredths of a Preferred Share for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights will become that number of Rights (calculated
to the nearest one ten-thousandth) obtained by dividing the Purchase Price in
effect immediately prior to adjustment of the Purchase Price by the Purchase
Price in effect immediately after adjustment of the Purchase Price. The Company
shall make a public announcement of its election to adjust the number of Rights,
indicating the record date for the adjustment, and, if known at the time, the
amount of the adjustment to be made. This record date may be the date on which
the Purchase 



                                      (21)
<PAGE>   26

Price is adjusted or any day thereafter, but, if the Right Certificates have
been issued, should be at least 10 days later than the date of the public
announcement. If Right Certificates have been issued, upon each adjustment of
the number of Rights pursuant to this Section 11(i), the Company shall, as
promptly as practicable, cause to be distributed to holders of record of Right
Certificates on such record date Right Certificates evidencing, subject to
Section 14 hereof, the additional Rights to which such holders would be entitled
as a result of such adjustment, or, at the option of the Company, shall cause to
be distributed to such holders of record in substitution and replacement for the
Right Certificates held by such holders prior to the date of adjustment, and
upon surrender thereof, if required by the Company, new Right Certificates
evidencing all the Rights to which such holders would be entitled after such
adjustment. Right Certificates so to be distributed will be issued, executed and
countersigned in the manner provided for herein and will be registered in the
names of the holders of record of Right Certificates on the record date
specified in the public announcement.

         (j) Irrespective of any adjustment or change in the Purchase Price or
the number of one one-hundredths of a Preferred Share issuable upon the exercise
of the Rights, the Right Certificates theretofore and thereafter issued may
continue to express the Purchase Price and the number of one one-hundredths of a
Preferred Share which were expressed in the initial Right Certificates issued
hereunder.

         (k) Before taking any action that would cause an adjustment reducing
the Purchase Price below one one-hundredth of the then par value, if any, of the
Preferred Shares issuable upon exercise of the Rights, the Company shall take
any corporate action which may, in the opinion of its counsel, be necessary in
order that the Company may validly and legally issue fully paid and
nonassessable Preferred Shares at such adjusted Purchase Price.

                                      (22)
<PAGE>   27

         (l) In any case in which this Section 11 requires that an adjustment in
the Purchase Price 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 of the Preferred Shares
and other capital stock or securities of the Company, if any, issuable upon such
exercise over and above the Preferred Shares and other capital stock or
securities of the Company, if any, issuable upon such exercise on the basis of
the Purchase Price in effect prior 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 shares upon
the occurrence of the event requiring such adjustment.

         (m) Anything in this Section 11 to the contrary notwithstanding, the
Company is entitled to make such reductions in the Purchase Price, in addition
to those adjustments expressly required by this Section 11, as and to the extent
that it in its sole discretion determines to be advisable in order that any
consolidation or subdivision of the Preferred Shares, issuance wholly for cash
of any Preferred Shares at less than the current market price, issuance wholly
for cash of Preferred Shares or securities which by their terms are convertible
into or exchangeable for Preferred Shares, dividends on Preferred Shares payable
in Preferred Shares or issuance of rights, options or warrants referred to
hereinabove in Section 11(b), hereafter made by the Company to holders of its
Preferred Shares are not taxable to such shareholders.

         (n) In the event that at any time after the date of this Agreement and
prior to the Distribution Date, the Company (i) declares or pay any dividend on
the Common Shares payable in Common Shares or (ii) effects a subdivision,
combination or consolidation of the Common Shares (by reclassification or
otherwise than by payment of dividends in Common Shares) into a greater or
lesser number of Common Shares, then in any such case (A) the number 


                                      (23)
<PAGE>   28

of one one-hundredths of a Preferred Share purchasable after such event upon
proper exercise of each Right will be determined by multiplying the number of
one one-hundredths of a Preferred Share so purchasable immediately prior to such
event by a fraction, the numerator of which is the number of Common Shares
outstanding immediately before such event and the denominator of which is the
number of Common Shares outstanding immediately after such event, and (B) each
Common Share outstanding immediately after such event will have issued with
respect to it that number of Rights which each Common Share outstanding
immediately prior to such event had issued with respect to it. The adjustments
provided for in this Section 11(n) will be made successively whenever such a
dividend is declared or paid or such a subdivision, combination or consolidation
is effected.

         Section 12. CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF 
SHARES. Whenever an adjustment is made as provided in Section 11 or 13 hereof,  
the Company shall promptly (a) prepare a certificate setting forth such
adjustment, and a brief statement of the facts accounting for such adjustment,
(b) file with the Rights Agent and with each transfer agent for the Common
Shares or the Preferred Shares a copy of such certificate and (c) mail a brief
summary thereof to each holder of a Right Certificate in accordance with
Section 26 hereof.

         Section 13. CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR
EARNING POWER. In the event, directly or indirectly, at any time after a Person
has become an Acquiring Person, (a) the Company consolidates with, or merges
with and into, any other Person, (b) any Person consolidates with the Company,
or merges with and into the Company and the Company is the continuing or
surviving corporation of such merger and, in connection with such merger, all or
part of the Common Shares is changed into or exchanged for stock or other
securities of any other Person (or the Company) or cash or any other property,
or (c) the Company sells or



                                      (24)
<PAGE>   29

otherwise transfers (or one or more of its Subsidiaries sells or otherwise
transfers), in one or more transactions, assets or earning power aggregating 50%
or more of the assets or earning power of the Company and its Subsidiaries
(taken as a whole) to any other Person other than the Company or one or more of
its wholly-owned Subsidiaries, then, and in each such case, the Company shall
make proper provision so that (i) each holder of a Right (except as otherwise
provided herein) thereafter has the right to receive, upon the exercise thereof
at a price equal to the then current Purchase Price multiplied by the number of
one one-hundredths of a Preferred Share for which a Right is then exercisable,
in accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of Common Shares of such other Person (including the Company as
successor thereto or as the surviving corporation) as then equals the result
obtained by (A) multiplying the then current Purchase Price by the number of one
one-hundredths of a Preferred Share for which a Right is then exercisable and
dividing that product by (B) 50% of the then current per share market price of
the Common Shares of such other Person (determined pursuant to Section 11(d)
hereof) on the date of consummation of such consolidation, merger, sale or
transfer; (ii) the issuer of such Common Shares will thereafter be liable for,
and shall assume, by virtue of such consolidation, merger, sale or transfer, all
the obligations and duties of the Company pursuant to this Agreement; (iii) the
term "Company" thereafter will be deemed to refer to such issuer; and (iv) such
issuer shall take such steps (including, but not limited to, the reservation of
a sufficient number of its Common Shares in accordance with Section 9 hereof) in
connection with such consummation as may be necessary to assure that the
provisions hereof will thereafter be applicable, as nearly as reasonably may be,
in relation to the Common Shares thereafter deliverable upon the exercise of the
Rights. The Company must not consummate any such consolidation, merger, sale or
transfer unless prior thereto the Company and such issuer



                                      (25)
<PAGE>   30

must have executed and delivered to the Rights Agent a supplemental agreement so
providing. The Company must not enter into any transaction of the kind referred
to in this Section 13 if at the time of such transaction there are any rights,
warrants, instruments or securities outstanding or any agreements or
arrangements which, as a result of the consummation of such transaction, would
eliminate or substantially diminish the benefits intended to be afforded by the
Rights. The provisions of this Section 13 will similarly apply to successive
mergers or consolidations or sales or other transfers.

         Section 14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES. (a) The Company is
not required to issue fractions of Rights or to distribute Right Certificates
which evidence fractional Rights. In lieu of such fractional Rights, the Company
shall pay an amount in cash equal to the same fraction of the current market
value of a whole Right to the registered holders of the Right Certificates with
regard to which such fractional Rights would otherwise be issuable. For the
purposes of this Section 14(a), the current market value of a whole Right means
the closing price of the Rights for the Trading Day immediately prior to the
date on which such fractional Rights would have been otherwise issuable. The
closing price for any day means the last sale price, regular way, or, in case no
such sale takes place on such day, the average of the closing bid and asked
prices, regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed or admitted to
trading on the New York Stock Exchange or, if the Rights are not listed or
admitted to trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Rights are listed or
admitted to trading or, if the Rights are not listed or admitted to trading on
any national securities exchange, the last quoted price or, if not so quoted,
the average of the high bid and low asked prices in the 


                                      (26)
<PAGE>   31

over-the-counter market, as reported by NASDAQ or such other system then in use
or, if on any such date the Rights are not quoted by any such organization, the
average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Rights selected by the Board. If on any such
date no such market maker is making a market in the Rights, the current market
value of the Rights means the fair value of the Rights on such date as
determined in good faith by the Board.

         (b) The Company is not be required to issue fractions of Preferred
Shares (other than fractions which are integral multiples of one one-hundredth
of a Preferred Share) upon exercise of the Rights or to distribute certificates
which evidence fractional Preferred Shares (other than fractions which are
integral multiples of one one-hundredth of a Preferred Share). Fractions of
Preferred Shares in integral multiples of one one-hundredth of a Preferred Share
may, at the election of the Company, be evidenced by depositary receipts,
pursuant to an appropriate agreement between the Company and a depositary
selected by it; PROVIDED, that such agreement provides that the holders of such
depositary receipts shall have all the rights, privileges and preferences to
which they are entitled as beneficial owners of the Preferred Shares represented
by such depositary receipts. In lieu of fractional Preferred Shares that are not
integral multiples of one one-hundredth of a Preferred Share, the Company shall
pay an amount in cash equal to the same fraction of the current market value of
one Preferred Share to the registered holders of Right Certificates at the time
such Rights are exercised as herein provided. For the purposes of this Section
14(b), the current market value of a Preferred Share means the closing price of
a Preferred Share (as determined pursuant to the second sentence of Section
11(d)(i) hereof) for the Trading Day immediately prior to the date of such
exercise.

                                      (27)
<PAGE>   32

         (c) The holder of a Right by the acceptance of the Right expressly
waives the holder's right to receive any fractional Rights or any fractional
shares upon exercise of a Right (except as provided

above).

         Section 15. RIGHTS OF ACTION. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Right
Certificates (and, 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, on behalf and the benefit of the
holder, enforce, and may institute and maintain any suit, action or proceeding
against the Company to enforce, or otherwise act in respect of, the holder's
right to exercise the Rights evidenced by such Right Certificate in the manner
provided in such Right Certificate and in this Agreement. Without limiting the
foregoing or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and are entitled to specific performance of the
obligations under, and injunctive relief against actual or threatened violations
of the obligations of any Person subject to, this Agreement.

         Section 16. AGREEMENT OF RIGHT HOLDERS. Every holder of a Right, by
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

         (a) prior to the Distribution Date, the Rights will be transferable
only in connection with the transfer of the Common Shares;


                                      (28)
<PAGE>   33

         (b) after the Distribution Date, the Right Certificates are
transferable 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; and

         (c) the Company and the Rights Agent may deem and treat the person in
whose name the 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 Common Shares
certificate made by anyone other than the Company or the Rights Agent) for all
purposes whatsoever, and neither the Company nor the Rights Agent will be
affected by any notice to the contrary.

         Section 17. RIGHT CERTIFICATE HOLDER NOT DEEMED A SHAREHOLDER. No
holder, as such, of any Right Certificate is entitled to vote, receive dividends
or be deemed for any purpose the holder of the Preferred Shares or any other
securities of the Company which may at any time be issuable on the exercise of
the Rights represented thereby, nor should 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 shareholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
shareholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
shareholders (except as provided in Section 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or Rights evidenced by
such Right Certificate have been exercised in accordance with the provisions
hereof.

         Section 18. CONCERNING THE RIGHTS AGENT. The Company agrees to pay to
the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to


                                      (29)
<PAGE>   34

time, on demand of the Rights Agent, its reasonable expenses and counsel fees
and other disbursements incurred in the administration and execution of this
Agreement and the exercise and performance of its duties hereunder. The Company
also agrees to indemnify the Rights Agent for, and to hold it harmless against,
any loss, liability, or expense, incurred without negligence, bad faith or
willful misconduct on the part of the Rights Agent, for anything done or omitted
by the Rights Agent in connection with the acceptance and administration of this
Agreement, including the costs and expenses of defending against any claim of
liability in the premises.

         The Rights Agent is protected and will not incur any liability for, or
in respect of any action taken, suffered or omitted by it in connection with,
its administration of this Agreement in reliance upon any Right Certificate or
certificate for the Preferred Shares or 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, or otherwise upon the advice of counsel as set forth in
Section 20 hereof.

         Section 19. MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.
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 powers of the Rights Agent or any successor Rights Agent, will
be the successor to the Rights Agent under this Agreement without the execution
or filing of any paper or any further act on the part of any of the parties
hereto;


                                      (30)
<PAGE>   35

PROVIDED, that such corporation would be eligible for appointment as a successor
Rights Agent under the provisions of Section 21 hereof. In case at the time such
successor Rights Agent succeeds to the agency created by this Agreement, any of
the Right Certificates 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 have not been countersigned, any successor
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 will have the full force provided in the
Right Certificates and in this Agreement.

         In case at any time the name of the Rights Agent is changed and at such
time any of the Right Certificates 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 have not 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 will have the full force provided in the
Right Certificates and in this Agreement.

         Section 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of Right Certificates,
by their acceptance thereof, are bound:

         (a) The Rights Agent may consult with legal counsel (who may be legal
counsel for the Company), and the opinion of such counsel will be full and
complete 


                                      (31)
<PAGE>   36

authorization and protection to the Rights Agent as to any action taken or
omitted by it in good faith and in accordance with such opinion.

         (b) Whenever in the performance of its duties under this Agreement the
Rights Agent deems it necessary or desirable that any fact or matter be proved
or established by the Company prior to 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 President, any Vice President, the Treasurer or the
Secretary of the Company and delivered to the Rights Agent; and such certificate
will be full authorization to the Rights Agent for any action taken or suffered
in good faith by it under the provisions of this Agreement in reliance upon such
certificate.

         (c) The Rights Agent is liable hereunder to the Company and any other
Person only for its own negligence, bad faith or willful misconduct.

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

         (e) The Rights Agent is not responsible (i) in any respect for the
validity of this Agreement or the execution and delivery hereof (except the due
execution hereof by the Rights Agent) or in any respect for the validity or
execution of any Right Certificate (except its countersignature thereof); (ii)
for any breach by the Company of any covenant or condition contained in this
Agreement or in any Right Certificate; or (iii) for any change in the
exercisability of the Rights (including the Rights becoming void pursuant to
Section 11(a)(ii)


                                      (32)
<PAGE>   37

hereof) or any adjustment in the terms of the Rights (including the manner,
method or amount thereof) provided for in Section 3, 11, 13, 23 or 24, or the
ascertaining of the existence of facts that would require any such change or
adjustment (except with respect to the exercise of Rights evidenced by Right
Certificates after actual notice that such change or adjustment is required).
The Rights Agent does not hereby make any representation or warranty as to (i)
the authorization or reservation of any Preferred Shares to be issued pursuant
to this Agreement or any Right Certificate or (ii) as to whether any Preferred
Shares will, when issued, be validly authorized and issued, fully paid and
nonassessable.

         (f) The Company agrees that it will 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 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 President,
any Vice President, the Secretary or the Treasurer of the Company, and to apply
to such officers for advice or instructions in connection with its duties, and
it will not be liable for any action taken or suffered by it in good faith in
accordance with instructions of any such officer or for any delay in acting
while waiting for those instructions.

         (h) The Rights Agent and any shareholder, 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 pecuniary 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 


                                      (33)
<PAGE>   38

were not Rights Agent under this 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 will 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.

         Section 21. CHANGE OF RIGHTS AGENT. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon 30 days notice in writing mailed to the Company and to each transfer agent
of the Common Shares or Preferred Shares by registered or certified mail, and to
the holders of the Right Certificates 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 or Preferred Shares by
registered or certified mail, and to the holders of the Right Certificates by
first-class mail. If the Rights Agent resigns or is removed or otherwise becomes
incapable of acting, the Company shall appoint a successor to the Rights Agent.
If the Company fails 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 (who shall, with such notice, submit his Right
Certificate for inspection by the Company), then the registered holder of any
Right Certificate may apply to any court of competent jurisdiction for the
appointment of a new Rights Agent. Any successor Rights Agent, whether appointed
by 



                                      (34)
<PAGE>   39

the Company or by such a court, must be a corporation organized and doing
business under the laws of the United States or of the State of Ohio (or of any
other state of the United States so long as such corporation is authorized to do
business as a banking institution in the State of Ohio), in good standing,
having an office in the State of Ohio, which is authorized under such laws to
exercise corporate trust or stock transfer powers and is subject to supervision
or examination by federal or state authority and which has at the time of its
appointment as Rights Agent a combined capital and surplus of at least $50
million. After appointment, the successor Rights Agent will 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
or Preferred Shares, and mail a notice thereof in writing to the registered
holders of the Right Certificates. Failure to give any notice provided for in
this Section 21, however, or any defect therein, will 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 22. ISSUANCE OF NEW RIGHT CERTIFICATES. Notwithstanding any of
the provisions of this 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 the Board to reflect any adjustment or change in the
Purchase Price and the number or kind or class of shares


                                      (35)
<PAGE>   40

or other securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.

         Section 23. REDEMPTION. (a) The Board may, at its option, at any time
prior to such time as any Person becomes an Acquiring Person, redeem all but not
less than all the then outstanding Rights at a redemption price of $.01 per
Right, appropriately adjusted to reflect any stock split, stock dividend or
similar transaction occurring after the date hereof (such redemption price being
hereinafter referred to as the "Redemption Price"). The redemption of the Rights
by the Board may be made effective at such time, on such basis and with such
conditions as the Board in its sole discretion may establish.

         (b) Immediately upon the action of the Board ordering the redemption of
the Rights pursuant to paragraph (a) of this Section 23, 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 will be to receive the
Redemption Price. The Company shall promptly give public notice of any such
redemption; PROVIDED, HOWEVER, that the failure to give, or any defect in, any
such notice will not affect the validity of such redemption. Within 10 days
after such action of the Board ordering the redemption of the Rights, the
Company shall mail a notice of redemption to all the holders of the then
outstanding Rights 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. Any notice that is mailed in
the manner herein provided will be deemed given, whether or not the holder
receives the notice. Each such notice of redemption will state the method by
which the payment of the Redemption Price will be made. Neither the Company nor
any of its Affiliates or Associates may redeem, acquire or purchase for value
any Rights at any time in any manner other than that specifically set forth in



                                      (36)
<PAGE>   41

this Section 23 or in Section 24 hereof, and other than in connection with the
purchase of Common Shares prior to the Distribution Date.

         Section 24. EXCHANGE. (a) The Board may, at its option, at any time
after any Person becomes an Acquiring Person, exchange all or part of the then
outstanding and exercisable Rights (which would not include Rights that have
become void pursuant to the provisions of Section 11(a)(ii) hereof) for Common
Shares at an exchange ratio of one Common Share per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof (such exchange ratio being hereinafter referred
to as the "Exchange Ratio"). Notwithstanding the foregoing sentence, the Board
may not effect such exchange at any time after any Person (other than the
Company, any Subsidiary of the Company, any employee benefit plan of the Company
or any such Subsidiary, or any entity holding Common Shares for or pursuant to
the terms of any such plan), together with all Affiliates and Associates of such
Person, becomes the Beneficial Owner of 50% or more of the Common Shares then
outstanding.

         (b) Immediately upon the action of the Board ordering the exchange of
any Rights pursuant to paragraph (a) of this Section 24 and without any further
action and without any notice, the right to exercise such Rights will terminate
and the only right thereafter of a holder of such Rights will be to receive that
number of Common Shares equal to the number of such Rights held by such holder
multiplied by the Exchange Ratio. The Company shall promptly give public notice
of any such exchange; PROVIDED, HOWEVER, that the failure to give, or any defect
in, such notice will not affect the validity of such exchange. The Company shall
mail a notice of any such exchange promptly to all of the holders of such Rights
at their last addresses as they appear upon the registry books of the Rights
Agent. Any notice that is mailed in the 


                                      (37)
<PAGE>   42

manner herein provided will be deemed given, whether or not the holder receives
the notice. Each such notice of exchange will state the method by which the
exchange of the Common Shares for Rights will be effected and, in the event of
any partial exchange, the number of Rights which will be exchanged. Any partial
exchange will be effected pro rata based on the number of Rights (other than
Rights which have become void pursuant to the provisions of Section 11(a)(ii)
hereof) held by each holder of Rights.

         (c) In the event that the number of Common Shares issued but not
outstanding or authorized but unissued is not sufficient to permit any exchange
of Rights as contemplated in accordance with this Section 24, the Company shall
take all such action as may be necessary to authorize additional Common Shares
for issuance upon exchange of the Rights. In the event the Company is unable,
after good faith effort, to take all such action as may be necessary to
authorize such additional Common Shares, the Company shall substitute, for each
Common Share that would otherwise be issuable upon exchange of a Right, a number
of Preferred Shares or fraction thereof such that the current per share market
price of one Preferred Share multiplied by such number or fraction is equal to
the current per share market price of one Common Share as of the date of
issuance of such Preferred Shares or fraction thereof.

         (d) The Company is not required to issue fractions of Common Shares or
to distribute certificates which evidence fractional Common Shares. In lieu of
such fractional Common Shares, the Company shall pay an amount in cash equal to
the same fraction of the current market value of a whole Common Share to the
registered holders of the Right Certificates with regard to which such
fractional Common Shares would otherwise be issuable. For the purposes of this
paragraph (d), the current market value of a whole Common Share means the
closing price of a Common Share (as determined pursuant to the second sentence
of 


                                      (38)
<PAGE>   43

Section 11(d)(i) hereof) for the Trading Day immediately prior to the date of
exchange pursuant to this Section 24.

         Section 25. NOTICE OF CERTAIN EVENTS. (a) If the Company proposes (i)
to pay any dividend payable in stock of any class to the holders of its
Preferred Shares or to make any other distribution to the holders of its
Preferred Shares (other than a regular quarterly cash dividend), (ii) to offer
to the holders of its Preferred Shares rights or warrants to subscribe for or to
purchase any additional Preferred Shares or shares of stock of any class or any
other securities, rights or options, (iii) to effect any reclassification of its
Preferred Shares (other than a reclassification involving only the subdivision
of outstanding Preferred Shares), (iv) to effect any consolidation or merger
into or with, or to effect any sale or other transfer (or to permit one or more
of its Subsidiaries to effect any sale or other transfer), in one or more
transactions, of 50% or more of the assets or earning power of the Company and
its Subsidiaries (taken as a whole) to, any other Person, (v) to effect the
liquidation, dissolution or winding up of the Company, or (vi) to declare or pay
any dividend on the Common Shares payable in Common Shares or to effect a
subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares),
then, in each such case, the Company shall give to each holder of a Right
Certificate, in accordance with Section 26 hereof, a notice of such proposed
action, which specifies the record date for the purposes of such stock dividend,
or distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the Common Shares and/or Preferred Shares, if any such
date is to be fixed. In the case of any action covered by clause (i) or (ii)
above the Company shall give such notice at least 10 days prior to the record
date for determining holders


                                      (39)
<PAGE>   44

of the Preferred Shares for purposes of such action. In the case of any other
action covered by clauses (iii) through (iv) above, the Company shall give
notice, at least 10 days prior to the date of the taking of such proposed action
or the date of participation therein by the holders of the Common Shares and/or
Preferred Shares, whichever is earlier.

         (b) If the event set forth in Section 11(a)(ii) hereof occurs, then the
Company shall give to each holder of a Right Certificate, in accordance with
Section 26 hereof, a notice of the occurrence of such event as soon as
practicable thereafter, describing such event and the consequences of such event
to holders of Rights under Section 11(a)(ii) hereof.

         Section 26. NOTICES. Notices or demands authorized by this Agreement to
be given or made by the Rights Agent or by the holder of any Right Certificate
to or on the Company are sufficiently given or made if sent by first-class mail,
postage prepaid, addressed (until another address is filed in writing with the
Rights Agent) as follows:

                Collaborative Clinical Research, Inc.
                20600 Chagrin Boulevard
                Cleveland, Ohio  44122
                Attention: President

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Right Certificate to or on the Rights Agent is 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:

                 National City Bank
                 1900 East Ninth Street
                 Cleveland, Ohio 44114
                 Attention:  Corporate Trust Department

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate are
sufficiently given or made if sent by 


                                      (40)
<PAGE>   45

first-class mail, postage prepaid, addressed to such holder at the address of
such holder as shown on the registry books of the Company.

         Section 27. SUPPLEMENTS AND AMENDMENTS. The Company may from time to
time supplement or amend this Agreement without the approval of any holders of
Right Certificates in order to cure any ambiguity, to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provisions herein, or to make any other provisions with respect to the Rights
which the Company may deem necessary or desirable, any such supplement or
amendment to be evidenced by a writing signed by the Company and the Rights
Agent; PROVIDED, HOWEVER, that from and after such time as any Person becomes an
Acquiring Person, this Agreement must not be amended in any manner that would
adversely affect the interests of the holders of Rights. Without limiting the
foregoing sentence, the Company may at any time prior to such time as any Person
becomes an Acquiring Person amend this Agreement to lower the thresholds set
forth in Sections 1(a) and 3(a) to not less than the greater of (i) the sum of
 .001% and the largest percentage of the outstanding Common Shares then known by
the Company to be beneficially owned by any Person (other than the Company, any
Subsidiary of the Company, any employee benefit plan of the Company or any
Subsidiary of the Company, or any entity holding Common Shares for or pursuant
to the terms of any such plan) and (ii) 10%.

         Section 28. SUCCESSORS. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Rights Agent bind and
inure to the benefit of their respective successors and assigns hereunder.

         Section 29. BENEFITS OF THIS AGREEMENT. Nothing in this Agreement
should be construed to give to any person or corporation other than the Company,
the Rights Agent and the 



                                      (41)
<PAGE>   46

registered holders of the Right Certificates (and, prior to the Distribution
Date, the Common Shares) any legal or equitable right, remedy or claim under
this Agreement; but this Agreement is for the sole and exclusive benefit of the
Company, the Rights Agent and the registered holders of the Right Certificates
(and, prior to the Distribution Date, the Common Shares).

         Section 30. SEVERABILITY. If any term, provision, covenant or
restriction of this 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 Agreement will remain in
full force and effect and shall in no way be affected, impaired or invalidated.

         Section 31. GOVERNING LAW. This Agreement and each Right Certificate
issued hereunder shall be deemed to be a contract made under the laws of the
State of Ohio and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts to be made and
performed entirely within such State.

         Section 32. COUNTERPARTS. This Agreement may be executed in any number
of counterparts and each of such counterparts should for all purposes be deemed
to be an original, and all such counterparts together constitute but one and the
same instrument.

         Section 33. DESCRIPTIVE HEADINGS. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and should not
control or affect the meaning or construction of any of the provisions hereof.

                                      (42)
<PAGE>   47

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

                                           COLLABORATIVE CLINICAL RESEARCH, INC.

Attest:

By /s/ Terry C. Black                      By /s/  Jeffrey A. Green
   ------------------------------------       ---------------------------------
    Title: Terry C. Black, Vice               Title:   President and
           President of Finance, Chief                 Chief Executive Officer
           Financial Officer, Treasurer
           and Assistant Secretary

Attest:                                    NATIONAL CITY BANK


By /s/                                     By  /s/  Sherry L. Damore
   --------------------------------           ---------------------------------
         Title:                                   Title:   Vice President





                                      (43)

<PAGE>   48
                                                                     Exhibit A
                                                                   ------------
                                                                    to Exhibit 1

                            CERTIFICATE OF AMENDMENT

                                       to

                                   ARTICLE IV

                                       of

              FIFTH AMENDED AND RESTATED ARTICLES OF INCORPORATION

                                       of

                      COLLABORATIVE CLINICAL RESEARCH, INC.

             (Pursuant to Sections 1701.06(A)(12) and 1701.70 of the
                          Ohio General Corporation Law)

           Collaborative Clinical Research, Inc., a corporation organized and
existing under the General Corporation Law of the State of Ohio (hereinafter
called the "Corporation"), hereby certifies that the following resolution was
adopted by the Board of Directors of the Corporation pursuant to Sections
1701.06(A)(12) and 1701.70 of the General Corporation Law at a meeting duly
called and held on September 2, 1997:

           RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Corporation (hereinafter called the "Board of
Directors" or the "Board") in accordance with the provisions of the Fifth
Amended and Restated Articles of Incorporation, the Board of Directors hereby
creates a series of Serial Preferred Shares, without par value, of the
Corporation and hereby states the designation and number of shares, and fixes
the relative rights, preferences, and limitations thereof as follows:

<PAGE>   49

                                  Subdivision D

           Series A Junior Participating Preferred Stock:

           Section 1. DESIGNATION AND AMOUNT. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock" (the "Series A
Preferred Stock") and the number of shares constituting the Series A Preferred
Stock shall be 500,000. Such number of shares may be increased or decreased by
resolution of the Board of Directors; PROVIDED, that no decrease shall reduce
the number of shares of Series A Preferred Stock to a number less than the
number of shares then outstanding plus the number of shares reserved for
issuance upon the exercise of outstanding options, rights or warrants or upon
the conversion of any outstanding securities issued by the Corporation
convertible into Series A Preferred Stock.

           Section 2. DIVIDENDS AND DISTRIBUTIONS.

           (A) Subject to the rights of the holders of any shares of any series
of Serial Preferred Shares (or any similar stock) ranking prior and superior to
the Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock, in preference to the holders of Common Shares, of the
Corporation, and of any other junior stock, shall be entitled to receive, when,
as and if declared by the Board of Directors out of funds legally available for
the purpose, quarterly dividends payable in cash on the first day of March,
June, September and December in each year (each such date being referred to
herein as a "Quarterly Dividend Payment Date"), commencing on the first
Quarterly Dividend Payment Date after the first

                                      (2)

<PAGE>   50

issuance of a share or fraction of a share of Series A Preferred Stock, in an
amount per share (rounded to the nearest cent) equal to the greater of (a) $1 or
(b) subject to the provision for adjustment hereinafter set forth, 100 times the
aggregate per share amount of all cash dividends, and 100 times the aggregate
per share amount (payable in kind) of all non-cash dividends or other
distributions, other than a dividend payable in shares of Common Shares or a
subdivision of the outstanding shares of Common Shares (by reclassification or
otherwise), declared on the Common Shares 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. In the event the Corporation shall at any time declare
or pay any dividend on the Common Shares payable in shares of Common Shares, or
effect a subdivision or combination or consolidation of the outstanding shares
of Common Shares (by reclassification or otherwise than by payment of a dividend
in shares of Common Shares) into a greater or lesser number of shares of Common
Shares, then in each such case the amount to which holders of shares of Series A
Preferred Stock were entitled immediately prior to such event under clause (b)
of the preceding sentence shall be adjusted by multiplying such amount by a
fraction, the numerator of which is the number of shares of Common Shares
outstanding immediately after such event and the denominator of which is the
number of shares of Common Shares that were outstanding immediately prior to
such event.

           (B) The Corporation shall declare a dividend or distribution on the
Series A Preferred Stock as provided in paragraph (A) of this Section
immediately after it declares a dividend or distribution on the Common Shares
(other than a dividend payable in shares of Common Shares); provided that, in
the event no dividend or distribution shall have been declared

                                      (3)

<PAGE>   51

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.

           (C) Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Preferred Stock from the Quarterly Dividend Payment Date next
preceding the date of issue of such shares, unless the date of issue of such
shares is prior to the record date for the first Quarterly Dividend Payment
Date, in which case dividends on such shares shall begin to accrue from the date
of issue of such shares, or unless the date of issue is a Quarterly Dividend
Payment Date or is a date after the record date for the determination of holders
of shares of Series A Preferred Stock entitled to receive a quarterly dividend
and before such Quarterly Dividend Payment Date, in either of which events such
dividends shall begin to accrue and be cumulative from such Quarterly Dividend
Payment Date. 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. The Board of Directors may fix a record date for the determination
of holders of shares of Series A Preferred Stock entitled to receive payment of
a dividend or distribution declared thereon, which record date shall be not more
than 60 days prior to the date fixed for the payment thereof.

                                      (4)

<PAGE>   52

           Section 3. 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 Corporation shall not:

           (i) declare or pay dividends, or make any other distributions, on 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, 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 junior (either as to dividends or upon liquidation,
dissolution or winding up) to the Series A Preferred Stock, provided that the
Corporation may at any time redeem, purchase or otherwise acquire shares of any
such junior stock in exchange for shares of any stock of the Corporation ranking
junior (either as to dividends or upon dissolution, liquidation or winding up)
to the Series A Preferred Stock; or

                                      (5)

<PAGE>   53

           (iv) redeem or purchase or otherwise acquire for consideration any
shares of Series A Preferred Stock, or any shares of 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 Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under paragraph (A) of
this Section 3, purchase or otherwise acquire such shares at such time and in
such manner.

           Section 4. REACQUIRED SHARES. Any shares of Series A Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof. All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
subject to the conditions and restrictions on issuance set forth herein, in the
Articles of Incorporation, or in any other Certificate of Designations creating
a series of Preferred Stock or any similar stock or as otherwise required by
law.

                                      (6)

<PAGE>   54

           Section 5. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any
liquidation, dissolution or winding up of the Corporation, 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 $100 per share, plus an amount equal to
accrued and unpaid dividends and distributions thereon, whether or not declared,
to the date of such payment, provided that the holders of shares of Series A
Preferred Stock shall be entitled to receive an aggregate amount per share,
subject to the provision for adjustment hereinafter set forth, equal to 100
times the aggregate amount to be distributed per share to holders of shares of
Common Shares, or (2) to the holders of 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 distributions made ratably on the Series A
Preferred Stock and all 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. In the event the Corporation shall at any time
declare or pay any dividend on the Common Shares payable in shares of Common
Shares, or effect a subdivision or combination or consolidation of the
outstanding shares of Common Shares (by reclassification or otherwise than by
payment of a dividend in shares of Common Shares) into a greater or lesser
number of shares of Common Shares, then in each such case the aggregate amount
to which holders of shares of Series A Preferred Stock were entitled immediately
prior to such event under the proviso in clause (1) of the preceding sentence
shall be adjusted by multiplying such amount by a fraction the numerator of
which is the number of shares of Common Shares outstanding immediately after
such event and the denominator of which is the number of shares of Common Shares
that were outstanding immediately prior to such event.

                                      (7)

<PAGE>   55

           Section 6. CONSOLIDATION MERGER, ETC. In case the Corporation shall
enter into any consolidation, merger, combination or other transaction in which
the shares of Common Shares are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case each share of
Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 100 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Shares is changed or exchanged.
In the event the Corporation shall at any time declare or pay any dividend on
the Common Shares payable in shares of Common Shares, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Shares (by
reclassification or otherwise than by payment of a dividend in shares of Common
Shares) into a greater or lesser number of shares of Common Shares, then in each
such case the amount set forth in the preceding sentence with respect to the
exchange or change of shares of Series A Preferred Stock shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Shares outstanding immediately after such event and the
denominator of which is the number of shares of Common Shares that were
outstanding immediately prior to such event.

           Section 7. NO REDEMPTION. The shares of Series A Preferred Stock
shall not be redeemable.

                                      (8)

<PAGE>   56

           Section 8. RANK. The Series A Preferred Stock shall rank, with
respect to the payment of dividends and the distribution of assets, junior to
all series of any other class of the Corporation's Preferred Stock.

           Section 9. AMENDMENT. The Fifth Amendment and Restated Articles of
Incorporation of the Corporation shall not be amended in any manner which would
materially alter or change the powers, preferences or special rights of the
Series A Preferred Stock so as to affect them adversely without the affirmative
vote of the holders of at least two-thirds of the outstanding shares of Series A
Preferred Stock, voting together as a single class.

           IN WITNESS WHEREOF, this Certificate of Amendment is executed on
behalf of the Corporation by its President and attested by its Secretary this
_____ day of September, 1997.

                                             /s/   Jeffrey A. Green

                                             ----------------------------
                                             President

Attest:

/S/  Terry C. Black

- ------------------------------
Terry C. Black,
Assistant Secretary

                                      (9)

<PAGE>   57

                             EXHIBIT B to Exhibit 1
                             ----------------------

                            Form of Right Certificate

Certificate No. R-   _____ Rights

         NOT EXERCISABLE AFTER SEPTEMBER 2, 2007 OR EARLIER IF REDEMPTION OR
EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT AND TO
EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.

                                Right Certificate

                      COLLABORATIVE CLINICAL RESEARCH, INC.

                  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 September 2, 1997 (the "Rights
Agreement"), between Collaborative Clinical Research, Inc., an Ohio corporation
(the "Company"), and National City Bank (the "Rights Agent"), to purchase from
the Company at any time after the Distribution Date (as such term is defined in
the Rights Agreement) and prior to 5:00 P.M., Cleveland time, on September 2,
2007 at the principal office of the Rights Agent, or at the office of its
successor as Rights Agent, one one-hundredth of a fully paid non-

<PAGE>   58

assessable share of Series A Junior Participating Preferred Stock, without par
value (the "Preferred Shares"), of the Company, at a purchase price of $30 per
one one-hundredth of a Preferred Share (the "Purchase Price"), upon presentation
and surrender of this Right Certificate with the Form of Election to Purchase
duly executed. The number of Rights evidenced by this Right Certificate (and the
number of one one-hundredths of a Preferred Share which may be purchased upon
exercise hereof) set forth above, and the Purchase Price set forth above, are
the number and Purchase Price as of September 2, 1997, based on the Preferred
Shares as constituted at such date. As provided in the Rights Agreement, the
Purchase Price and the number of one one-hundredths of a Preferred Share which
may be purchased upon the exercise of the Rights evidenced by this Right
Certificate are subject to modification and adjustment upon the happening of
certain events.

                  This Right Certificate is subject to all of 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 Rights Agreement reference 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 principal executive offices of
the Company and the above-mentioned offices of the Rights Agent.

                  This Right Certificate, with or without other Right
Certificates, upon surrender at the principal 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

                                       2

<PAGE>   59

aggregate number of Preferred 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 Certificate (i) may be redeemed by the Company at a redemption
price of $.01 per Right or (ii) may be exchanged in whole or in part for
Preferred Shares or shares of the Company's Common Stock, without par value.

                  No fractional Preferred Shares will be issued upon the
exercise of any Right or Rights evidenced hereby (other than fractions which are
integral multiples of one one-hundredth of a Preferred Share, which may, at the
election of the Company, be evidenced by depositary receipts), but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

                  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 shareholder of the Company or any right to vote for the
election of directors or upon any matter submitted to shareholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting shareholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or

                                       3

<PAGE>   60

otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Rights Agreement.

                  This Right Certificate shall not be valid or obligatory for
any purpose until it shall have been countersigned by the Rights Agent.

                  WITNESS the facsimile signature of the proper officers of the
Company and its corporate seal. Dated as of _____________, 1997.

ATTEST:                                COLLABORATIVE CLINICAL RESEARCH, INC.

_______________________________        By______________________________________

Countersigned:

NATIONAL CITY BANK

By_______________________________
         Authorized Signature

                                       4

<PAGE>   61

         Form of Reverse Side of Right Certificate

                               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 Company,
with full power of substitution.

Dated:  _______________, 1997

                                            ------------------------------------
                                            Signature

Signature Guaranteed:

                  Signatures must be guaranteed by a member firm of a registered
national securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank or trust company having an office or
correspondent in the United States.

- -----------------------------------

                                       5

<PAGE>   62

                  The undersigned hereby certifies that the Rights evidenced by
this Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).

                                           ------------------------------------
                                           Signature

- -------------------------------------------



                                       6

<PAGE>   63

             Form of Reverse Side of Right Certificate -- continued

                          FORM OF ELECTION TO PURCHASE

                          ----------------------------

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

To:  COLLABORATIVE CLINICAL RESEARCH, INC.

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

Please insert social security
or other identifying number

- -------------------------------------------------------------------------------
                         (Please print name and address)

- --------------------------------------------------------------------------------

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:  _______________, 1997

                                       7

<PAGE>   64

                                            ------------------------------------
                                            Signature

Signature Guaranteed:

                  Signatures must be guaranteed by a member firm of a registered
national securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank or trust company having an office or
correspondent in the United States.

                                       8

<PAGE>   65

             Form of Reverse Side of Right Certificate -- continued

- -----------------------------------------------------------------

                  The undersigned hereby certifies that the Rights evidenced by
this Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).

                                           ------------------------------------
                                           Signature

- -------------------------------------------


                                     NOTICE

                                     ------

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

                  In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Company and the Rights Agent will deem the beneficial owner of
the Rights evidenced by this Right Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and such
Assignment or Election to Purchase will not be honored.

                                       9

<PAGE>   66

                             Exhibit C to Exhibit 1
                             ----------------------

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

                  On September 2, 1997, the Board of Directors of Collaborative
Clinical Research, Inc. (the "Company") declared a dividend of one preferred
share purchase right (a "Right") for each outstanding share of common stock,
without par value (the "Common Shares"), of the Company. The dividend is payable
on September 15, 1997 (the "Record Date") to the shareholders of record on that
date. Each Right entitles the registered holder to purchase from the Company one
one-hundredth of a share of Series A Junior Participating Preferred Stock,
without par value (the "Preferred Shares"), of the Company at a price of $30 per
one one-hundredth of a Preferred Share (the "Purchase Price"), subject to
adjustment. The description and terms of the Rights are set forth in a Rights
Agreement (the "Rights Agreement") between the Company and National City Bank,
as Rights Agent (the "Rights Agent").

                  Until the earlier to occur of (i) 10 days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") have acquired beneficial ownership of 20% or more of the
outstanding Common Shares or (ii) 10 business days (or such later date as may be
determined by action of the Board of Directors prior to such time as any person
or group of affiliated persons becomes an Acquiring Person) following the
commencement of, or announcement of an intention to make, a tender offer or
exchange offer the consummation of which would result in the beneficial
ownership by a person or group of 20% or more of the outstanding Common Shares
(the earlier of such dates being called the "Distribution Date"), the Rights
will be evidenced, with respect to any of the Common Share certificates
outstanding as of the Record Date, by such Common Share certificate with a copy
of this Summary of Rights attached thereto.

                  The Rights Agreement provides that, until the Distribution
Date (or earlier redemption or expiration of the Rights), the Rights will be
transferred with, and only with, the Common Shares. Until the Distribution Date
(or earlier redemption or expiration of the Rights), new Common Share
certificates issued after the Record Date upon transfer or new issuance of
Common Shares will contain a notation incorporating the Rights Agreement by
reference. Until the Distribution Date (or earlier redemption or expiration of
the Rights), the surrender for transfer of any certificates for Common Shares
outstanding as of the Record Date, with or without such notation or a copy of
this Summary of Rights being attached thereto, will also constitute the transfer
of the Rights associated with the Common Shares represented by such certificate.
As soon as practicable following the Distribution Date, separate certificates
evidencing the Rights ("Right Certificates") will be mailed to holders of record
of the Common Shares as of the close of business on the Distribution Date and
such separate Right Certificates alone will evidence the Rights.

                                       
<PAGE>   67

                  The Rights are not exercisable until the Distribution Date.
The Rights will expire on September 2, 2007 (the "Final Expiration Date") unless
the Final Expiration Date is extended or unless the Rights are earlier redeemed
or exchanged by the Company, in each case, as described below.

                  The Purchase Price payable, and the number of Preferred Shares
or other securities or property issuable, upon exercise of the Rights are
subject to adjustment from time to time to prevent dilution (i) in the event of
a stock dividend on, or a subdivision, combination or reclassification of, the
Preferred Shares, (ii) upon the grant to holders of the Preferred Shares of
certain rights or warrants to subscribe for or purchase Preferred Shares at a
price, or securities convertible into Preferred Shares with a conversion price,
less than the then-current market price of the Preferred Shares, or (iii) upon
the distribution to holders of the Preferred Shares of evidences of indebtedness
or assets (excluding regular periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).

                  The number of outstanding Rights and the number of one
one-hundredths of a Preferred Share issuable upon exercise of each Right are
also subject to adjustment in the event of a stock split of the Common Shares or
a stock dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

                  Preferred Shares purchasable upon exercise of the Rights will
not be redeemable. Each Preferred Share will be entitled to a minimum
preferential quarterly dividend payment of $1.00 per share but will be entitled
to an aggregate dividend of 100 times the dividend declared per Common Share. In
the event of liquidation, the holders of the Preferred Shares will be entitled
to a minimum preferential liquidation payment of $100.00 per share but will be
entitled to an aggregate payment of 100 times the payment made per Common Share.
Each Preferred Share will have 1 vote, voting together with the Common Shares.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
100 times the amount received per Common Share. These rights are protected by
customary antidilution provisions.

                  Because of the nature of the Preferred Shares' dividend, and
liquidation rights, the value of the one one-hundredth interest in a Preferred
Share purchasable upon exercise of each Right should approximate the value of
one Common Share.

                  In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold after a person or group has become an Acquiring Person,
proper provision will be made so that each holder of a Right will thereafter
have the right to receive, upon the exercise thereof at the then current
exercise price of the Right, that number of shares of common stock of the
acquiring company which at the time of such transaction will have a market value
of two times the exercise price of the Right. In the event that any person or
group of affiliated or associated persons becomes an Acquiring Person, proper
provision shall be made so that each holder of a Right,


                                      2
<PAGE>   68

other than Rights beneficially owned by the Acquiring Person (which will
thereafter be void), will thereafter have the right to receive upon exercise
that number of Common Shares having a market value of two times the exercise
price of the Right.

                  At any time after any person or group becomes an Acquiring
Person and prior to the acquisition by such person or group of 50% or more of
the outstanding Common Shares, the Board of Directors of the Company may
exchange the Rights (other than Rights owned by such person or group which will
have become void), in whole or in part, at an exchange ratio of one Common
Share, or one one-hundredth of a Preferred Share (or of a share of a class or
series of the Company's preferred stock having equivalent rights, preferences
and privileges), per Right (subject to adjustment).

                  With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments require an adjustment of at least
1% in such Purchase Price.

                  No fractional Preferred Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share, which may, at the election of the Company, be evidenced by depositary
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day prior to the date
of exercise.

                  At any time prior to the acquisition by a person or group of
affiliated or associated persons of beneficial ownership of 20% or more of the
outstanding Common Shares, the Board of Directors of the Company may redeem the
Rights in whole, but not in part, at a price of $0.01 per Right (the "Redemption
Price"). The redemption of the Rights may be made effective at such time on such
basis with such conditions as the Board of Directors in its sole discretion may
establish. Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

                  The terms of the Rights may be amended by the Board of
Directors of the Company without the consent of the holders of the Rights,
including an amendment to lower certain thresholds described above to not less
than the greater of (i) the sum of 0.001% and the largest percentage of the
outstanding Common Shares then known to the Company to be beneficially owned by
any person or group of affiliated or associated persons and (ii) 10.0%, except
that from and after such time as any person or group of affiliated or associated
persons becomes an Acquiring Person no such amendment may adversely affect the
interests of the holders of the Rights.

                  Until a Right is exercised, the holder thereof, as such, will
have no rights as a shareholder of the Company, including, without limitation,
the right to vote or to receive dividends.

                  A copy of the Rights Agreement has been filed with the
Securities and Exchange Commission as an Exhibit to a Registration Statement on
Form 8-A dated September 15, 1997. A copy of the Rights Agreement is available
free of charge from the Company. This summary 



                                       3
<PAGE>   69

description of the Rights does not purport to be complete and is qualified in
its entirety by reference to the Rights Agreement, which is hereby incorporated
herein by reference.

                                       4



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