COMERICA INC /NEW/
8-A12B, 1996-06-19
STATE COMMERCIAL BANKS
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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 (g) OF THE
                        SECURITIES EXCHANGE ACT OF 1934


                            COMERICA INCORPORATED                          
             (Exact name of registrant as specified in its charter)


        Delaware                                          38-1998421          
(State of Incorporation or                    (IRS Employer Identification No.)
    Organization)          

Comerica Tower of Detroit Center, Detroit, Michigan           48226       
     (Address of principal executive offices)               (Zip Code)


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



                                                Name of each exchange
     Title of each class                        on which each class is
     to be so registered                        to be registered      
     -------------------                        ----------------------

       Preferred Stock                          New York Stock Exchange
       Purchase Rights                                                   


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


             None                                 
- ----------------------------------
       (Title of Class)

<PAGE>   2

ITEM 1.  DESCRIPTION OF SECURITIES TO BE REGISTERED.

                  On May 17, 1996, the Board of Directors of Comerica
Incorporated (the "Company") authorized the issuance and distribution of one
Right for each outstanding share of common stock, par value $5.00 per share, of
the Company (the "Common Stock") to shareholders of record at the close of
business on the expiration date of the Rights issued and distributed to
shareholders in 1988 (the "Record Date"), which is expected to occur on July 1,
1996.  Each Right entitles the registered holder to purchase from the Company a
unit (a "Unit") consisting of one one-thousandth of a share of Series D
Participating Preferred Stock, without par value (the "Preferred Stock"), at a
Purchase Price of $125 per one one-thousandth of a share, subject to
adjustment.  The terms of the Rights are set forth in a Rights Agreement (the
"Rights Agreement") between the Company and Comerica Bank, as Rights Agent.

                 Initially, the Rights will be attached to all Common Stock
certificates representing shares then outstanding, and no separate Rights
Certificates will be distributed.  The Rights will be separate from the Common
Stock and a Distribution Date will occur upon the earlier of (i) 10 days
following a public announcement that a person or group of affiliated or
associated persons (an "Acquiring Person") has acquired, or obtained the right
to acquire, beneficial ownership of 10% or more of the outstanding shares of
Common Stock (the "Stock Acquisition Date"), or (ii) 10 business days (or such
later date as the Board of Directors shall determine) following the
commencement of a tender offer or exchange offer that would result in a person
or group beneficially owning 10% or more of such outstanding shares of Common
Stock.  Until the Distribution Date, (i) the Rights will be evidenced by the
Common Stock certificates and will be transferred with and only with such
Common Stock certificates, (ii) new Common Stock certificates issued after the
Record Date will contain a notation incorporating the Rights Agreement by
reference and (iii) the surrender for transfer of any certificates for Common
Stock outstanding will also constitute the transfer of the Rights associated
with the Common Stock represented by such certificate.

                 The Rights are not exercisable until the Distribution Date and
will expire at the close of business on July 1, 2006, unless earlier redeemed
by the Company as described below.

                 As soon as practicable after the Distribution Date, Rights
Certificates will be mailed to holders of record of the Common Stock as of the
close of business on the Distribution Date and, thereafter, the separate Rights
Certificates alone will represent the Rights.  Except as otherwise determined
by the Board of Directors and except in certain





                                       2

<PAGE>   3

circumstances set forth in the Rights Agreement, only shares of Common Stock
issued prior to the Distribution Date will be issued with Rights.

          In the event that, subject to certain exceptions, a Person becomes
the beneficial owner of 10% or more of the then outstanding shares of Common
Stock (except pursuant to an offer for all outstanding shares of Common Stock
which the independent directors determine to be fair to and otherwise in the
best interests of the Company and its shareholders), each holder of a Right
will thereafter have the right to receive, upon exercise, Common Stock (or, in
certain circumstances, other consideration of the Company) having a value equal
to two times the exercise price of the Right.  Notwithstanding any of the
foregoing, following the occurrence of the event set forth in this paragraph,
all Rights that are, or (under certain circumstances specified in the Rights
Agreement) were, beneficially owned by any Acquiring Person will be null and
void.


          For example, at an exercise price of $125 per Right, each Right not
owned by an Acquiring Person (or by certain related parties) following an event
set forth in the preceding paragraph would entitle its holder to purchase $250
worth of Common Stock (or other consideration, as noted above) for $125.
Assuming that the Common Stock had a per share value of $50 at such time, the
holder of each valid Right would be entitled to purchase 5 shares of Common
Stock for $125.

          In the event that, at any time following the Stock Acquisition Date,
(i) the Company is acquired in a merger or other business combination
transaction in which the Company is not the surviving corporation or its Common
Stock is changed or exchanged (other than a merger which follows an offer
described in the second preceding paragraph) or (ii) 50% or more of the
Company's assets or earning power is sold or transferred, each holder of a
Right (except Rights which previously have been voided as set forth above)
shall thereafter have the right to receive, upon exercise, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right.  The events set forth in this paragraph and in the second preceding
paragraph are referred to as the "Triggering Events."

                 The Purchase Price payable, and the number of units of
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 of
reclassification of, the Preferred Stock, (ii) if holders of the Preferred
Stock are granted certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the
Preferred Stock, or (iii) upon the distribution to holders of the Preferred
Stock of evidences of indebtedness or





                                       3

<PAGE>   4

assets (excluding regular quarterly cash dividends) or of subscription rights
or warrants (other than those referred to above).

                 With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments amount to at least 1% of the
Purchase Price.  No fractional Units will be issued and, in lieu thereof, an
adjustment in cash will be made based on the market price of the Preferred
Stock on the last trading date prior to the date of exercise.

                 At any time until a Person becomes an Acquiring Person, the
Company may redeem the Rights in whole, but not in part, at a price of $.01 per
Right.  Immediately upon the action of the Board ordering redemption of the
Rights, the Rights will terminate and the only right of the holders of Rights
will be to receive the $.01 redemption price.

                 Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.  While the distribution of the
Rights will not be taxable to stockholders or to the Company, stockholders may,
depending upon the circumstances, recognize taxable income in the event that
the Rights become exercisable for Common Stock (or other consideration) of the
Company or for common stock of the acquiring company as set forth above.

                 Any of the provisions of the Rights Agreement may be amended
by the Board prior to the Distribution Date.  After the Distribution Date, the
provisions of the Rights Agreement may be amended by the Board in order to cure
any ambiguity, to correct any inconsistency, to conform to applicable law or to
make changes which do not adversely affect in any material respect the
interests of holders of Rights.

                 As of June 14, 1996, there were 115,743,806 shares of Common
Stock outstanding and 3,550,611 shares of Common Stock in the treasury.  As of
May 31, 1996, there were 2,691,456 shares of Common Stock reserved for issuance
pursuant to options outstanding and under employee plans.  Each share of Common
Stock outstanding at the close of business on the Record Date will receive one
Right.  So long as the Rights are attached to the Common Stock, one additional
Right (as such number may be adjusted pursuant to the provisions of the Rights
Agreement) shall be deemed to be delivered for each share of Common Stock
issued or transferred by the Company in the future.  In addition, following the
Distribution Date and prior to the expiration or redemption of the Rights, the
Company may issue Rights when it issues Common Stock only if the Board





                                       4
<PAGE>   5
deems it to be necessary or appropriate, or in connection with the issuance of
shares of Common Stock pursuant to the exercise of stock options or under
employee plans or upon the exercise, conversion or exchange of certain
securities of the Company.

                 The Rights may have certain anti-takeover effects.  The Rights
will cause substantial dilution to a person or group that attempts to acquire
the Company in a manner which causes the Rights to become discount Rights
unless the offer is conditional on a substantial number of Rights being
acquired.  The Rights, however, should not affect any prospective offeror
willing to make an offer at a fair price and otherwise in the best interests of
the Company and its stockholders as determined by a majority of the Board of
Directors who are not affiliated with the person making the offer, or willing
to negotiate with the Board of Directors.  The Rights should not interfere with
any merger or other business combination approved by the Board of Directors
since the Board of Directors may, at its option, at any time until a person
becomes an Acquiring Person redeem all but not less than all the then
outstanding Rights at the $.01 redemption price per right.

                 The Rights Agreement, dated as of June 18, 1996, between the
Company and Comerica Bank, as Rights Agent, specifying the terms of the Rights
and including the exhibits thereto, is attached hereto as an exhibit and is
incorporated herein by reference.  The foregoing description of the Rights is
qualified in its entirety by reference to such exhibit.


ITEM 2.          EXHIBITS.

      99.1       Rights Agreement, dated as of June 18, 1996, between Comerica
                 Incorporated and Comerica Bank, as Rights Agent, including the
                 form of Rights Certificate as Exhibit A and the Summary of
                 Rights as Exhibit B.  Pursuant to the Rights Agreement,
                 printed Rights Certificates will not be mailed until after the
                 Distribution Date (as such term is defined in the Rights
                 Agreement).





                                       5

<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, thereunto duly
authorized.

Dated:  June 19, 1996             Comerica Incorporated



                                  By: /s/ Mark W. Yonkman
                                     -------------------------------
                                  Name:   Mark W. Yonkman
                                  Title:  Vice President and Assistant Secretary





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<PAGE>   7
                                EXHIBIT INDEX


Exhibit 
  No.                     Description                                     Page
- -------                   -----------                                     ----

 99.1                     Rights Agreement, dated as of June 18, 1996, 
                          between Comerica Incorporated and Comerica 
                          Bank, which includes as Exhibit A thereto, 
                          the Form of Rights Certificate.



<PAGE>   1
                                                                   EXHIBIT 99.1

  __________________________________________________________________________


                             COMERICA INCORPORATED


                                      and


                                 COMERICA BANK

                                  Rights Agent




                             _____________________



                                Rights Agreement

                           Dated as of June 18, 1996



  __________________________________________________________________________



 
<PAGE>   2

                               Table of Contents

<TABLE>
<CAPTION>

Section                                                                                                          Page
- -------                                                                                                          ----
   <S>  <C>                                                                                                    <C>
   1.   Certain Definitions .................................................................................      3
   2.   Appointment of Rights Agent .........................................................................     12
   3.   Issue of Rights Certificates ........................................................................     12
   4.   Form of Rights Certificates .........................................................................     16
   5.   Countersignature and Registration ...................................................................     18
   6.   Transfer, Split Up, Combination and Exchange of Rights 
           Certificates; Mutilated, Destroyed, Lost or Stolen Rights 
           Certificates .....................................................................................     20
   7.   Exercise of Rights; Purchase Price; Expiration Date of Rights .......................................     22
   8.   Cancellation and Destruction of Rights Certificates .................................................     27
   9.   Reservation and Availability of Capital Stock .......................................................     28
   10.  Preferred Stock Record Date .........................................................................     32
   11.  Adjustment of Purchase Price, Number and Kind of Shares or 
           Number of Rights .................................................................................     34
   12.  Certificate of Adjusted Purchase Price or Number of Shares ..........................................     56
   13.  Consolidation, Merger or Sale or Transfer of Assets or 
           Earning Power ....................................................................................     57
   14.  Fractional Rights and Fractional Shares .............................................................     64
   15.  Rights of Action ....................................................................................     67
   16.  Agreement of Rights Holders .........................................................................     68
   17.  Rights Certificate Holder Not Deemed a Stockholder ..................................................     70
   18.  Concerning the Rights Agent .........................................................................     71
   19.  Merger or Consolidation or Change of Name of Rights Agent ...........................................     72
   20.  Duties of Rights Agent ..............................................................................     73
   21.  Change of Rights Agent ..............................................................................     78
   22.  Issuance of New Rights Certificates .................................................................     81
   23.  Redemption and Termination ..........................................................................     82
   24.  Notice of Certain Events ............................................................................     84
   25.  Notices .............................................................................................     86
   26.  Supplements and Amendments ..........................................................................     87
   27.  Successors ..........................................................................................     89
   28.  Determinations and Actions by the Board of Directors, etc.  .........................................     89
   29.  Benefits of this Agreement ..........................................................................     90
   30.  Severability ........................................................................................     91
   31.  Governing Law .......................................................................................     92
</TABLE>



                                      i

                                        
<PAGE>   3

<TABLE>
   <S>  <C>                                                                                                      <C>
   32.  Counterparts ........................................................................................     92
   33.  Descriptive Headings ................................................................................     92
</TABLE>

Exhibit A --     Form of Certificate of Designation, Preferences and Rights of
                 Series D Participating Preferred Stock

Exhibit B --     Form of Rights Certificate

Exhibit C --     Form of Summary of Rights




                                      ii
                                        
<PAGE>   4


                                RIGHTS AGREEMENT


RIGHTS AGREEMENT, dated as of June 18, 1996 (the "Agreement"), between
Comerica Incorporated, a Delaware corporation (the "Company"), and Comerica
Bank, a Michigan corporation (the "Rights Agent").

                              W I T N E S S E T H

WHEREAS, on January 26, 1988, the Board of Directors of the Company (the
"Board") (i) approved and adopted a Rights Agreement (which Rights Agreement is
referred to herein as the "1988 Rights Agreement") between the Company and the
Rights Agent, (ii) authorized and declared a dividend distribution of one right
(a "1988 Right") for each share of Common Stock (as hereinafter defined) of the
Company outstanding at the close of business on February 8, 1988 (the "1988
Record Date"), and (iii) authorized the issuance of one 1988 Right (as such
number was adjusted pursuant to the provisions of Section 11(p) of the 1988
Rights Agreement) for each share of Common Stock of the Company issued between
the 1988 Record Date (whether originally issued or delivered from the Company's
treasury) and the Distribution Date (specified in the 1988 Rights Agreement);

WHEREAS, pursuant to the 1988 Rights Agreement, the 1988 Rights will
expire no later than July 1, 1996;

WHEREAS, on May 17, 1996, the Board determined it desirable and in the
best interests of the Company and its stockholders for the Company to extend
the benefits afforded by the 1988 Rights Agreement and to implement such
extension by executing this Agreement;

WHEREAS, on May 17, 1996 (the "Rights Dividend Declaration Date"), the
Board authorized and declared a dividend distribution of one Right for each
share of Common Stock outstanding at the close of business on the "Expiration
Date" specified in the 1988 Rights Agreement (the "Record Date"), and has
authorized the issuance of one Right (as such number may hereinafter be
adjusted pursuant to the provisions of Section 11(p) hereof) for each share of
Common Stock of the Company issued between the Record Date (whether originally
issued or delivered from the Company's treasury) and Distribution Date (as
hereinafter defined), each Right initially representing the right to purchase
one one-thousandth of a share of Series D Participating Preferred Stock of the
Company having the rights, powers and pref-





                                        
<PAGE>   5

erences set forth in the form of Certificate of Designation, Preferences and
Rights attached hereto as Exhibit A, upon the terms and subject to the
conditions hereinafter set forth (the "Rights");

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

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

                        (a)  "Acquiring Person" shall mean any Person who or
which, together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of 10% or more of the shares of Common Stock then outstanding,
but shall not include (i) the Company, (ii) any Subsidiary of the Company,
(iii) any employee benefit plan of the Company or of any Subsidiary of the
Company, (iv) any Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan, (v) any Person who has
reported or is required to report such ownership (but less than 15%) on
Schedule 13G under the Exchange Act (or any comparable or successor report) or
on Schedule 13D under the Exchange Act (or any comparable or successor report)
which Schedule 13D does not state any intention to, or reserve the right to,
control or influence the management or policies of the Company or engage in any
of the actions specified in Item 4 of such Schedule (other than the disposition
of the Common Stock) and who, within 10 Business Days of being requested by the
Company to advise it regarding the same, certifies to the Company that such
Person acquired shares of Common Stock in excess of 9.9% inadvertently or
without knowledge of the terms of the Rights and who, together with all
Affiliates and Associates, thereafter does not acquire additional shares of
Common Stock while the Beneficial Owner of 10% or more of the shares of Common
Stock then outstanding; provided, however, that if the Person requested to so
certify fails to do so within 10 Business Days, then such Person shall become
an Acquiring Person immediately after such 10 Business Day period or (vi) any
Person who becomes the Beneficial Owner of ten percent (10%) or more of the
shares of Common Stock then outstanding as a result of a reduction in the
number of shares of Common Stock outstanding due to the repurchase of shares of
Common Stock by the Company unless and until such Person, after becoming aware
that such Person has become the Beneficial Owner of 10% or more of the then
outstanding shares of Common Stock, acquires beneficial ownership of additional
shares of Common Stock representing one percent (1%) or more of the shares of
Common Stock then outstanding.




                                      2
                                        
<PAGE>   6


                          (b)     "Act" shall mean the Securities Act of 1933.

                          (c)  "Affiliate" and "Associate" shall 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 and in
effect on the date of this Agreement (the "Exchange Act").

                          (d)  A Person shall be deemed the "Beneficial Owner"
of, and shall be deemed to "beneficially own," any securities:

                                  (i)  which such Person or any of such
         Person's Affiliates or Associates, directly or indirectly, has the
         right to acquire (whether such right is exercisable immediately or
         only after the passage of time) pursuant to any agreement, arrangement
         or understanding (whether or not in writing) or upon the exercise of
         conversion rights, exchange rights, rights, warrants or options, or
         otherwise; provided, however, that a Person shall not be deemed the
         "Beneficial Owner" of, or to "beneficially own," (A) securities
         tendered pursuant to a tender or exchange offer made by such Person or
         any of such Person's Affiliates or Associates until such tendered
         securities are accepted for purchase or exchange, or (B) securities
         issuable upon exercise of Rights at any time prior to the occurrence
         of a Triggering Event, or (C) securities issuable upon exercise of
         Rights from and after the occurrence of a Triggering Event which
         Rights were acquired by such Person or any of such Person's Affiliates
         or Associates prior to the Distribution Date or pursuant to Section
         3(a) or Section 22 hereof (the "Original Rights") or pursuant to
         Section 11(i) hereof in connection with an adjustment made with
         respect to any Original Rights;

                          (ii)  which such Person or any of such Person's
         Affiliates or Associates, directly or indirectly, has the right to
         vote or dispose of or has "beneficial ownership" of (as determined
         pursuant to Rule 13d-3 of the General Rules and Regulations under the
         Exchange Act), including pursuant to any agreement, arrangement or
         understanding, whether or not in writing; provided, however, that a
         Person shall not be deemed the "Beneficial Owner" of, or to
         "beneficially own," any security under this subparagraph (ii) as a
         result of an agreement, arrangement or understanding to vote such
         security if such




                                      3
                                        
<PAGE>   7

         agreement, arrangement or understanding:  (A) arises solely from a
         revocable proxy given in response to a public proxy or consent
         solicitation made pursuant to, and in accordance with, the applicable
         provisions of the General Rules and Regulations under the Exchange Act
         and (B) is not also then reportable by such Person 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 (or any Affiliate or Associate
         thereof) with which such Person (or any of such Person's Affiliates or
         Associates) has any agreement, arrangement or understanding (whether
         or not in writing), for the purpose of acquiring, holding, voting
         (except pursuant to a revocable proxy as described in the proviso to
         subparagraph (ii) of this paragraph (d)) or disposing of any voting
         securities of the Company;

provided, however, that nothing in this paragraph (d) shall cause a Person
engaged in business as an underwriter of securities to be the "Beneficial
Owner" of, or to "beneficially own," any securities acquired through such
person's participation in good faith in a firm commitment underwriting until
the expiration of forty days after the date of such acquisition.

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

                          (f)  "Close of business" on any given date shall mean
5:00 P.M., Detroit time, on such date; provided, however, that if such date is
not a Business Day it shall mean 5:00 P.M., Detroit time, on the next
succeeding Business Day.

                          (g)  "Common Stock" shall mean the common stock,
$5.00 par value, of the Company, except that "Common Stock" when used with
reference to any Person other than the Company shall mean the capital stock of
such Person with the greatest voting power, or the equity securities or other
equity interest having power to control or direct the management, of such
Person.




                                      4
                                        
<PAGE>   8


                          (h)     "Common Stock Equivalents" shall have the
meaning set forth in Section 11(a)(iii) hereof.

                          (i)     "Current Market Price" shall have the meaning
set forth in Section 11(d)(i) hereof.

                          (j)     "Current Value" shall have the meaning set in
Section 11(a)(iii) hereof.

                          (k)     "Distribution Date" shall have the meaning
set forth in Section 3(a) hereof.

                          (l)     "Exchange Act" shall have the meaning set
forth in Section 1(c) hereof.

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

                          (n)     "Final Expiration Date" shall mean the close
of business on July 1, 2006.

                          (o)     "Person" shall mean any individual, firm,
corporation, partnership or other entity.

                          (p)     "Preferred Stock" shall mean shares of 
Series D Participating Preferred Stock, no par value, of the Company,
and, to the extent that there is not a sufficient number of shares of Series D
Participating Preferred Stock authorized to permit the full exercise of the
Rights, any other series of Preferred Stock, no par value, of the Company
designated for such purpose containing terms substantially similar to the terms
of the Series D Participating Preferred Stock.

                          (q)     "Principal Party" shall have the meaning set
forth in Section 13(b) hereof.

                          (r)     "Purchase Price" shall have the meaning set
forth in Section 4(a) hereof.

                          (s)     "Redemption Price" shall have the meaning set
forth in Section 23(a) hereof.



                                      5

                                        
<PAGE>   9


                          (t)     "Record Date" shall have the meaning set
forth in the WHEREAS clause at the beginning of the Agreement.

                          (u)     "Rights" shall have the meaning set forth in
the WHEREAS clause at the beginning of the Agreement.

                          (v)     "Rights Certificates" shall have the meaning
set forth in Section 3(a) hereof.

                          (w)     "Section 11(a)(ii) Event" shall mean any event
described in Section 11(a)(ii) hereof.

                          (x)     "Section 11(a)(ii) Trigger Date" shall have
the meaning set forth in Section 11(a)(iii) hereof.

                          (y)     "Section 13 Event" shall mean any event
described in clauses (x), (y) or (z) of Section 13(a) hereof.

                          (z)     "Spread" shall have the meaning set forth in
Section 11(a)(iii) hereof.

                          (aa)    "Stock Acquisition Date" shall mean the first
date of public announcement (which, for purposes of this definition, shall
include, without limitation, a report filed pursuant to Section 13(d) under the
Exchange Act) by the Company or an Acquiring Person that an Acquiring Person
has become such.

                          (bb)    "Subsidiary" shall mean, with reference to any
Person, any corporation of which an amount of voting securities sufficient to
elect at least a majority of the directors of such corporation is beneficially
owned, directly or indirectly, by such Person, or otherwise controlled by such
Person.

                          (cc)    "Substitution Period" shall have the meaning
set forth in Section 11(a)(iii) hereof.

                          (dd)    "Trading Day" shall have the meaning set forth
in Section 11(d)(i) hereof.

                          (ee)    "Triggering Event" shall mean any Section
11(a)(ii) Event or any Section 13 Event.




                                      6
                                        
<PAGE>   10


                 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, shall prior to the
Distribution Date also be the holders of the Common Stock) 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 may deem necessary or desirable.

                 Section 3.  Issue of Rights Certificates.

                        (a)  Until the earlier of (i) the close of business
on the tenth day after the Stock Acquisition Date (or, if the tenth day after
the Stock Acquisition Date occurs before the Record Date, the close of business
on the Record Date), or (ii) the close of business on the tenth Business Day
(or such later date as the Board shall determine) after the date that a tender
or exchange offer 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 Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan) is first published or
sent or given within the meaning of Rule 14d-2(a) of the General Rules and
Regulations under the Exchange Act, if upon consummation thereof, such Person
would be the Beneficial Owner of 10% or more of the shares of Common Stock then
outstanding (the earlier of (i) and (ii) being herein referred to as the
"Distribution Date"), (x) the Rights will be evidenced (subject to the
provisions of paragraph (b) of this Section 3) by the certificates for the
Common Stock registered in the names of the holders of the Common Stock (which
certificates for Common Stock shall be deemed also to be certificates for
Rights) and not by separate certificates, and (y) the Rights will be
transferable only in connection with the transfer of the underlying shares of
Common Stock (including a transfer to the Company).  As soon as practicable
after the Distribution Date, the Rights Agent will send by first-class,
insured, postage prepaid mail, to each record holder of the Common Stock as of
the close of business on the Distribution Date, at the address of such holder
shown on the records of the Company, one or more rights certificates, in
substantially the form of Exhibit B hereto (the "Rights Certificates"),
evidencing one Right for each share of Common Stock so held, subject to
adjustment as provided herein.  In the event that an adjustment in the number
of Rights per share of Common Stock has been made pursuant to Section 11(p)
hereof, at the time of distribution of the Rights Certificates, the Company
shall make the necessary and appropriate rounding adjustments (in accordance
with Section 14(a) hereof) so that Rights Certificates representing only whole
numbers of Rights are distributed and



                                      7

                                        
<PAGE>   11

cash is paid in lieu of any fractional Rights.  As of and after the
Distribution Date, the Rights will be evidenced solely by such Rights
Certificates.

                        (b)  The Company will make available a copy of a
Summary of Rights, in substantially the form attached hereto as Exhibit C, to
any holder of Rights who may so request from time to time.  With respect to
certificates for the Common Stock outstanding as of the Record Date, until the
Distribution Date, the Rights will be evidenced by such certificates for the
Common Stock and the registered holders of the Common Stock shall also be the
registered holders of the associated Rights.  Until the earlier of the
Distribution Date or the Expiration Date (as such term is defined in Section 7
hereof), the transfer of any certificates representing shares of Common Stock
in respect of which Rights have been issued shall also constitute the transfer
of the Rights associated with such shares of Common Stock.

                        (c)  Rights shall be issued in respect of all shares
of Common Stock which are issued (whether originally issued or from the
Company's treasury) after the Record Date but prior to the earlier of the
Distribution Date or the Expiration Date.  Certificates representing such
shares of Common Stock shall also be deemed to be certificates for Rights, and
shall bear the following legend (or the legend required under the 1988 Rights
Agreement):

                 This certificate also evidences and entitles the holder hereof
         to certain Rights as set forth in the Rights Agreement (the "Rights
         Agreement") between Comerica Incorporated (the "Company") and Comerica
         Bank (the "Rights Agent"), the terms of which are hereby incorporated
         herein by reference and a copy of which is on file at the principal
         offices of the Company.  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.  The
         Company will mail to the holder of this certificate a copy of the
         Rights Agreement, as in effect on the date of mailing, without charge
         promptly after receipt of a written request therefor.  Under certain
         circumstances set forth in the Rights Agreement, Rights issued to, or
         held by, any Person who is, was or becomes an Acquiring Person or any
         Affiliate or Associates thereof (as such terms are defined in the
         Rights Agreement), whether currently held by or on behalf of such
         Person or by any subsequent holder, may become null and void.



                                      8

                                        
<PAGE>   12


With respect to such certificates containing the foregoing legend (or the
legend required under the 1988 Rights Agreement), until the earlier of (i) the
Distribution Date or (ii) the Expiration Date, the Rights associated with the
Common Stock represented by such certificates shall be evidenced by such
certificates alone and registered holders of Common Stock shall also be the
registered holders of the associated Rights, and the transfer of any of such
certificates shall also constitute the transfer of the Rights associated with
the Common Stock represented by such certificates.

                 Section 4.  Form of Rights Certificates.

                        (a)  The Rights Certificates (and the forms of
election to purchase and of assignment to be printed on the reverse thereof)
shall each be substantially in the form set forth in Exhibit B hereto and may
have such marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Company may deem appropriate and as are not
inconsistent with the provisions of this 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 11 and Section 22 hereof, the Rights Certificates,
whenever distributed, shall be dated as of the Record Date and on their face
shall entitle the holders thereof to purchase such number of one
one-thousandths of a share of Preferred Stock as shall be set forth therein at
the price set forth therein (such exercise price per one one-thousandth of a
share, the "Purchase Price"), but the amount and type of securities purchasable
upon the exercise of each Right and the Purchase Price thereof shall be subject
to adjustment as provided herein.

                        (b)  Any Rights Certificate issued pursuant to
Section 3(a) or Section 22 hereof that represents Rights beneficially owned by:
(i) an Acquiring Person or any Associate or Affiliate of an Acquiring Person,
(ii) a transferee of an Acquiring Person (or of any such Associate or
Affiliate) who becomes a transferee after the Acquiring Person becomes such, or
(iii) a transferee of an Acquiring Person (or of any such Associate or
Affiliate) who becomes a transferee prior to or concurrently with the Acquiring
Person becoming such and receives such Rights pursuant to either (A) a transfer
(whether or not for consideration) from the Acquiring Person to holders of
equity interests in such Acquiring Person or to any Person with whom such
Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board has
determined is part of a plan, arrangement or understanding




                                      9
                                        
<PAGE>   13

which has as a primary purpose or effect avoidance of Section 7(e) hereof, and
any Rights Certificate issued pursuant to Section 6 or Section 11 hereof upon
transfer, exchange, replacement or adjustment of any other Rights Certificate
referred to in this sentence, shall contain (to the extent feasible) the
following legend:

         The Rights represented by this Rights Certificate are or were
         beneficially owned by a Person who was or became an Acquiring Person
         or an Affiliate or Associate of an Acquiring Person (as such terms are
         defined in the Rights Agreement).  Accordingly, this Rights Cer
         tificate and the Rights represented hereby may become null and void in
         the circumstances specified in Section 7(e) of such Agreement.

                 Section 5.  Countersignature and Registration.

                        (a)  The Rights Certificates shall be executed on
behalf of the Company by its Chairman of the Board, its Vice Chairman, its
President or any Vice President, either manually or by facsimile signature, and
shall have affixed thereto the Company's seal or a facsimile thereof which
shall be attested by the Secretary or an Assistant Secretary of the Company,
either manually or by facsimile signature.  The Rights Certificates shall be
countersigned by the Rights Agent, either manually or by facsimile signature,
and shall not be valid for any purpose unless so countersigned.  In case any
officer of the Company who shall have signed any of the Rights Certificates
shall cease to be such officer of the Company before countersignature by the
Rights Agent and issuance and delivery by the Company, such Rights
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 Rights Certificates had not ceased to be such officer of
the Company; and any Rights Certificates may be signed on behalf of the Company
by any person who, at the actual date of the execution of such Rights
Certificate, shall be a proper officer of the Company to sign such Rights
Certificate, although at the date of the execution of this Rights Agreement any
such person was not such an officer.

                        (b)  Following the Distribution Date, the Rights
Agent will keep or cause to be kept, at its principal office or offices
designated as the appropriate place for surrender of Rights Certificates upon
exercise or transfer, books for registration and transfer of the Rights
Certificates issued hereunder.  Such books shall show the names and addresses
of the respective holders of the Rights Certificates, the number of Rights
evidenced on its face by each of the Rights Certificates, the Certificate
number and the date of each of the Rights Certificates.



                                      10

                                        
<PAGE>   14


                 Section 6.  Transfer, Split Up, Combination and Exchange of
Rights Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates.
(a)  Subject to the provisions of Section 4(b), Section 7(e) and 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 Expiration Date, any Rights
Certificate or Certificates may be transferred, split up, combined or exchanged
for another Rights Certificate or Certificates, entitling the registered holder
to purchase a like number of one one-thousandths of a share of Preferred Stock
(or, following a Triggering Event, Common Stock, other securities, cash or
other assets, as the case may be) as the Rights Certificate or Certificates
surrendered then entitled such holder (or former holder in the case of a
transfer) to purchase.  Any registered holder desiring to transfer, split up,
combine or exchange any Rights Certificate or Certificates shall make such
request in writing delivered to the Rights Agent, and shall surrender the
Rights Certificate or Certificates to be transferred, split up, combined or
exchanged at the principal office or offices of the Rights Agent designated for
such purpose.  Neither the Rights Agent nor the Company shall be obligated to
take any action whatsoever with respect to the transfer of any such surrendered
Rights Certificate until the registered holder shall have completed and signed
the certificate contained in the form of assignment on the reverse side of such
Rights Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company shall reasonably request.  Thereupon the
Rights Agent shall, subject to Section 4(b), Section 7(e) and Section 14
hereof, countersign and deliver to the Person entitled thereto a Rights
Certificate or Rights Certificates, as the case may be, as so requested.  The
Company may require payment of a sum sufficient to cover any tax or
governmental charge that may be imposed in connection with any transfer, split
up, combination or exchange of Rights Certificates.

                (b)  Upon receipt by the Company and the Rights Agent
of evidence reasonably satisfactory to them of the loss, theft, destruction or
mutilation of a Rights Certificate, and, in case of loss, theft or destruction,
of indemnity or security reasonably satisfactory to them, and 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 Rights
Certificate if mutilated, the Company will execute and deliver a new Rights
Certificate of like tenor to the Rights Agent for countersignature and delivery
to the registered owner in lieu of the Rights Certificate so lost, stolen,
destroyed or mutilated.



                                      11

                                        
<PAGE>   15


                 Section 7.  Exercise of Rights; Purchase Price; Expiration
Date of Rights.  (a)  Subject to Section 7(e) hereof, the registered holder of
any Rights Certificate may exercise the Rights evidenced thereby (except as
otherwise provided herein including, without limitation, the restrictions on
exercisability set forth in Section 9(c) and Section 11(a)(iii)) in whole or in
part at any time after the Distribution Date upon surrender of the Rights
Certificate, with the form of election to purchase and the certificate on the
reverse side thereof duly executed, to the Rights Agent at the principal office
or offices of the Rights Agent designated for such purpose, together with
payment of the aggregate Purchase Price with respect to the total number of one
one-thousandths of a share (or other securities, cash or other assets, as the
case may be) as to which such surrendered Rights are then exercisable, at or
prior to the earlier of (i) July 1, 2006 (the "Final Expiration Date"), or (ii)
the time at which the Rights are redeemed as provided in Section 23 hereof (the
earlier of (i) and (ii) being herein referred to as the "Expiration Date").

                (b)  The Purchase Price for each one one-thousandth
of a share of Preferred Stock pursuant to the exercise of a Right shall
initially be $125, and shall be subject to adjustment from time to time as
provided in Sections 11 and 13(a) hereof and shall be payable in accordance
with paragraph (c) below.

                (c)  Upon receipt of a Rights Certificate representing 
execisable Rights, with the form of election to purchase and the
certificate duly executed, accompanied by payment, with respect to each Right
so exercised, of the Purchase Price per one one-thousandth of a share of
Preferred Stock (or other shares, securities, cash or other assets, as the case
may be) to be purchased as set forth below and an amount equal to any
applicable transfer tax, the Rights Agent shall, subject to Section 20(k)
hereof, thereupon promptly (i) (A) requisition from any transfer agent of the
shares of Preferred Stock (or make available, if the Rights Agent is the
transfer agent for such shares) certificates for the total number of one
one-thousandths of a share of Preferred Stock to be purchased and the Company
hereby irrevocably authorizes its transfer agent to comply with all such
requests, or (B) if the Company shall have elected to deposit the total number
of shares of Preferred Stock issuable upon exercise of the Rights hereunder
with a depositary agent, requisition from the depositary agent depositary
receipts representing such number of one one-thousandths of a share of
Preferred Stock as are to be purchased (in which case certificates for the
shares of Preferred Stock represented by such receipts shall be deposited by
the transfer agent with the depositary agent) and the Company will direct the
depositary agent to comply with such request, (ii) requisition from the Company
the amount of cash, if any, to be paid in lieu of fractional shares in
accordance with Section 14 here-



                                      12

                                        
<PAGE>   16

of, (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
Rights Certificate, registered in such name or names as may be designated by
such holder, and (iv) after receipt thereof, deliver such cash, if any, to or
upon the order of the registered holder of such Rights Certificate.  The
payment of the Purchase Price (as such amount may be reduced pursuant to
Section 11(a)(iii) hereof) shall be made in cash or by certified bank check,
bank draft or money order payable to the order of the Company.  In the event
that the Company is obligated to issue other securities (including Common
Stock) of the Company, pay cash and/or distribute other property pursuant to
Section 11(a) hereof, the Company will make all arrangements necessary so that
such other securities, cash and/or other property are available for
distribution by the Rights Agent, if and when appropriate.  The Company
reserves the right to require prior to the occurrence of a Triggering Event
that, upon any exercise of Rights, a number of Rights be exercised so that only
whole shares of Preferred Stock would be issued.

                (d)  In case the registered holder of any Rights
Certificate shall exercise less than all the Rights evidenced thereby, a new
Rights Certificate evidencing Rights equivalent to the Rights remaining
unexercised shall be issued by the Rights Agent and delivered to, or upon the
order of, the registered holder of such Rights Certificate, registered in such
name or names as may be designated by such holder, subject to the provisions of
Section 14 hereof.

                (e)  Notwithstanding anything in this Agreement to
the contrary, from and after the first occurrence of a Section 11(a)(ii) Event,
any Rights beneficially owned by (i) an Acquiring Person or an Associate or
Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee after the
Acquiring Person becomes such, or (iii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee prior to or
concurrently with the Acquiring Person becoming such and receives such Rights
pursuant to either (A) a transfer (whether or not for consideration) from the
Acquiring Person to holders of equity interests in such Acquiring Person or to
any Person with whom the Acquiring Person has any continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a transfer
which the Board of Directors of the Company has determined is part of a plan,
arrangement or understanding which has as a primary purpose or effect the
avoidance of this Section 7(e), shall become null and void without any further
action and no holder of such Rights shall have any rights whatsoever with
respect to such Rights, whether under any provision of this Agreement or
otherwise.  The Company shall use all reasonable efforts to insure that the
provisions of this Section 7(e) and



                                      13

                                        
<PAGE>   17

Section 4(b) hereof are complied with, but shall have no liability to any
holder of Rights Certificates or other Person as a result of its failure to
make any determinations with respect to an Acquiring Person or its Affiliates,
Associates or transferees hereunder.

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

                 Section 8.  Cancellation and Destruction of Rights
Certificates.  All Rights Certificates surrendered for the purpose of exercise,
transfer, split up, combination or exchange shall, if surrendered to the
Company or any of its agents, be delivered to the Rights Agent for cancellation
or in cancelled form, or, if surrendered to the Rights Agent, shall be
cancelled by it, and no Rights Certificates shall be issued in lieu thereof
except as expressly permitted by any of the provisions of this Agreement.  The
Company shall deliver to the Rights Agent for cancellation and retirement, and
the Rights Agent shall so cancel and retire, any other Rights Certificate
purchased or acquired by the Company otherwise than upon the exercise thereof.
The Rights Agent shall deliver all cancelled Rights Certificates to the
Company, or shall, at the written request of the Company, destroy such
cancelled Rights Certificates, and in such case shall deliver a certificate of
destruction thereof to the Company.

                 Section 9.  Reservation and Availability of Capital Stock.
(a)  The Company covenants and agrees that it will cause to be reserved and
kept available out of its authorized and unissued shares of Preferred Stock
(and, following the occurrence of a Triggering Event, out of its authorized and
unissued shares of Common Stock and/or other securities or out of its
authorized and issued shares held in its treasury), the number of shares of
Preferred Stock (and, following the occurrence of a Triggering Event, Common
Stock and/or other securities) that, as provided in this Agreement including
Section 11(a)(iii) hereof, will be sufficient to permit the exercise in full of
all outstanding Rights.



                                      14

                                        
<PAGE>   18


                          (b)  So long as the shares of Preferred Stock (and,
following the occurrence of a Triggering Event, Common Stock and/or other
securities) issuable and deliverable upon the exercise of the Rights may be
listed on any national securities exchange, the Company shall use its best
efforts to cause, from and after such time as the Rights become exercisable,
all shares reserved for such issuance to be listed on such exchange upon
official notice of issuance upon such exercise.

                          (c)  The Company shall use its best efforts to (i)
file, as soon as practicable following the earliest date after the first
occurrence of a Section 11(a)(ii) Event on which the consideration to be
delivered by the Company upon exercise of the Rights has been determined in
accordance with Section 11(a)(iii) hereof, or as soon as is required by law
following the Distribution Date, as the case may be, a registration statement
under the Act, with respect to the securities purchasable upon exercise of the
Rights on an appropriate form, (ii) cause such registration statement to become
effective as soon as practicable after such filing, and (iii) cause such
registration statement to remain effective (with a prospectus at all times
meeting the requirements of the Act) until the earlier of (A) the date as of
which the Rights are no longer exercisable for such securities, and (B) the
date of the expiration of the Rights.  The Company will also take such action
as may be appropriate under, or to ensure compliance with, the securities or
"blue sky" laws of the various states in connection with the exercisability of
the Rights.  The Company may temporarily suspend, for a period of time not to
exceed ninety (90) days after the date set forth in clause (i) of the first
sentence of this Section 9(c), the exercisability of the Rights in order to
prepare and file such registration statement and permit it to become effective.
Upon any such suspension, the Company shall issue a public announcement stating
that the exercisability of the Rights has been temporarily suspended, as well
as a public announcement at such time as the suspension is no longer in effect.
In addition, if the Company shall determine that a registration statement is
required following the Distribution Date, the Company may temporarily suspend
the exercisability of the Rights until such time as a registration statement
has been declared effective.  Notwithstanding any provision of this Agreement
to the contrary, the Rights shall not be exercisable in any jurisdiction if the
requisite qualification in such jurisdiction shall not have been obtained, the
exercise thereof shall not be permitted under applicable law or a registration
statement shall not have been declared effective.

                          (d)  The Company covenants and agrees that it will
take all such action as may be necessary to ensure that all one one-thousandths
of a share of Preferred Stock (and, following the occurrence of a Triggering
Event, Common Stock and/or other securities) delivered upon exercise of Rights
shall, at the time of delivery




                                      15
                                        
<PAGE>   19

of the certificates for such shares (subject to payment of the Purchase Price),
be duly and validly authorized and issued and fully paid and nonassessable.

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

                 Section 10.  Preferred Stock Record Date.  Each person in
whose name any certificate for a number of one one-thousandths of a share of
Preferred Stock (or Common Stock and/or other securities, as the case may be)
is issued upon the exercise of Rights shall for all purposes be deemed to have
become the holder of record of such fractional shares of Preferred Stock (or
Common Stock and/or other securities, as the case may be) represented thereby
on, and such certificate shall be dated the date upon which the Rights
Certificate evidencing such Rights was duly surrendered and payment of the
Purchase Price (and all applicable transfer taxes) was made; provided, however,
that if the date of such surrender and payment is a date upon which the
Preferred Stock (or Common Stock and/or other securities, as the case may be)
transfer books of the Company are closed, such Person shall be deemed to have
become the record holder of such shares (fractional or otherwise) on, and such
certificate shall be dated, the next succeeding Business Day on which the
Preferred Stock (or Common Stock and/or other securities, as the case may be)
transfer books of the Company are open.  Prior to the exercise of the Rights
evidenced thereby, the holder of a Rights Certificate shall not be entitled to
any rights of a stockholder of the Company with respect to shares for which the
Rights shall be exercisable, including, without limitation, the right to vote,
to receive dividends or other distributions or to




                                      16
                                        
<PAGE>   20

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

                 Section 11.  Adjustment of Purchase Price, Number and Kind of
Shares or Number of Rights.  The Purchase Price, the number and kind of 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)  In the event the Company shall at any time
after the date of this Agreement (A) declare a dividend on the Preferred Stock
payable in shares of Preferred Stock, (B) subdivide the outstanding Preferred
Stock, (C) combine the outstanding Preferred Stock into a smaller number of
shares, or (D) issue any shares of its capital stock in a reclassification of
the Preferred Stock (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) and Section
7(e) hereof, 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 Preferred Stock or
capital stock, as the case may be, issuable on such date, shall be
proportionately adjusted so that the holder of any Right exercised after such
time shall be entitled to receive, upon payment of the Purchase Price then in
effect, the aggregate number and kind of shares of Preferred Stock or capital
stock, as the case may be, which, if such Right had been exercised immediately
prior to such date and at a time when the Preferred Stock transfer books of the
Company were open, the holder would have owned upon such exercise and been
entitled to receive by virtue of such dividend, subdivision, combination or
reclassification.  If an event occurs which would require an adjustment under
both this Section 11(a)(i) and Section 11(a)(ii) hereof, the adjustment
provided for in this Section 11(a)(i) shall be in addition to, and shall be
made prior to, any adjustment required pursuant to Section 11(a)(ii) hereof.

                          (ii)    In the event that 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 Person or entity organized,
appointed or established by the Company for or pursuant to the terms of any
such plan), alone or together with its Affiliates and Associates, shall, at any
time after the Rights Dividend Declaration Date, become an Acquiring Person
unless the event causing such person to become an Acquiring Person is an
acquisition of shares of Common Stock pursuant to a tender offer or an exchange
offer for all outstanding shares of Common Stock at a price and on terms
determined by at least a majority of the members of the Board who




                                      17
                                        
<PAGE>   21

are not officers of the Company and who are not representatives, nominees,
Affiliates or Associates of an Acquiring Person, after receiving advice from
one or more investment banking firms, to be (a) at a price which is fair to
stockholders (taking into account all factors which such members of the Board
deem relevant including, without limitation, prices which could reasonably be
achieved if the Company or its assets were sold on an orderly basis designed to
realize maximum value) and (b) otherwise in the best interests of the Company
and its stockholders then, promptly following the occurrence of any such event,
proper provision shall be made so that each holder of a Right (except as
provided below and in Section 7(e) hereof) shall thereafter have the right to
receive, upon exercise thereof at the then current Purchase Price in accordance
with the terms of this Agreement, in lieu of a number of one one-thousandths of
a share of Preferred Stock, such number of shares of Common Stock of the
Company as shall equal the result obtained by (x) multiplying the then current
Purchase Price by the then number of one one-thousandths of a share of
Preferred Stock for which a Right was exercisable immediately prior to the
first occurrence of a Section 11(a)(ii) Event, and (y) dividing that product
(which, following such first occurrence, shall thereafter be referred to as the
"Purchase Price" for each Right and for all purposes of this Agreement) by 50%
of the Current Market Price (determined pursuant to Section 11(d) hereof) per
share of Common Stock on the date of such first occurrence (such number of
shares, the "Adjustment Shares").

                          (iii)  In the event that the number of shares of
Common Stock which are authorized by the Company's Restated Certificate of
Incorporation but not outstanding or reserved for issuance for purposes other
than upon exercise of the Rights are not sufficient to permit the exercise in
full of the Rights in accordance with the foregoing subparagraph (ii) of this
Section 11(a), the Company shall:  (A) determine the value of the Adjustment
Shares issuable upon the exercise of a Right (the "Current Value") and (B) with
respect to each Right (subject to Section 7(e) hereof), make adequate provision
to substitute for the Adjustment Shares, upon the exercise of a Right and
payment of the applicable Purchase Price, (1) cash, (2) a reduction in the
Purchase Price, (3) Common Stock or other equity securities of the Company
(including, without limitation, shares, or units of shares, of preferred stock,
such as the Preferred Stock which the Board has deemed to have essentially the
same value or economic rights as shares of Common Stock (such shares of
preferred stock, being referred to as "Common Stock Equivalents")), (4) debt
securities of the Company, (5) other assets, or (6) any combination of the
foregoing, having an aggregate value equal to the Current Value (less the
amount of any reduction in the Purchase Price), where such aggregate value has
been determined by the Board, based upon the advice of a nationally recognized
investment banking firm selected by the Board; provided, how-




                                      18
                                        
<PAGE>   22

ever, that if the Company shall not have made adequate provision to deliver
value pursuant to clause (B) above within thirty (30) days following the first
occurrence of a Section 11(a)(ii) Event (such date being referred to herein as
the "Section 11(a)(ii) Trigger Date"), then the Company shall be obligated to
deliver, upon the surrender for exercise of a Right and without requiring
payment of the Purchase Price, shares of Common Stock (to the extent available)
and then, if necessary, cash, which shares and/or cash have an aggregate value
equal to the Spread.  For purposes of the preceding sentence, the term "Spread"
shall mean the excess of (i) the Current Value over (ii) the Purchase Price.
If the Board determines in good faith that it is likely that sufficient
additional shares of Common Stock could be authorized for issuance upon
exercise in full of the Rights, the thirty (30) day period set forth above may
be extended to the extent necessary, but not more than ninety (90) days after
the Section 11(a)(ii) Trigger Date, in order that the Company may seek
stockholder approval for the authorization of such additional shares (such
thirty (30) day period, as it may be extended, is herein called the
"Substitution Period").  To the extent that action is to be taken pursuant to
the first and/or third sentences of this Section 11(a)(iii), the Company (1)
shall provide, subject to Section 7(e) hereof, that such action shall apply
uniformly to all outstanding Rights, and (2) may suspend the exercisability of
the Rights until the expiration of the Substitution Period in order to seek
such stockholder approval for such authorization of additional shares and/or to
decide the appropriate form of distribution to be made pursuant to such first
sentence and to determine the value thereof.  In the event of any such
suspension, the Company shall issue a public announcement stating that the
exercisability of the Rights has been temporarily suspended, as well as a
public announcement at such time as the suspension is no longer in effect.  For
purposes of this Section 11(a)(iii), the value of each Adjustment Share shall
be the Current Market Price per share of the Common Stock on the Section
11(a)(ii) Trigger Date and the per share or per unit value of any Common Stock
Equivalent shall be deemed to equal to Current Market Price per share of the
Common Stock on such date.  Notwithstanding the foregoing provisions of this
subparagraph (iii), in the event that, pursuant to this subparagraph (iii),
upon the exercise of the Rights of Company shall be required to deliver value
in any form other than shares of Common Stock, such value shall be delivered
only to the extent and at the time that, if required, the approval by
appropriate financial regulatory authorities with supervisory jurisdiction over
the Company of such delivery of such value shall have been obtained.

                          (b)  In case the Company shall fix a record date for
the issuance of rights, options or warrants to all holders of Preferred Stock
entitling them to subscribe for or purchase (for a period expiring within
forty-five (45) calendar days after




                                      19
                                        
<PAGE>   23

such record date) Preferred Stock (or shares having the same rights, privileges
and preferences as the shares of Preferred Stock ("equivalent preferred
stock")) or securities convertible into Preferred Stock or equivalent preferred
stock at a price per share of Preferred Stock or per share of equivalent
preferred stock (or having a conversion price per share, if a security
convertible into Preferred Stock or equivalent preferred stock) less than the
Current Market Price (as determined pursuant to Section 11(d) hereof) per share
of Preferred Stock on such record date, the Purchase Price to be in effect
after such record date shall be determined by multiplying the Purchase Price in
effect immediately prior to such record date by a fraction, the numerator of
which shall be the number of shares of Preferred Stock outstanding on such
record date, plus the number of shares of Preferred Stock which the aggregate
offering price of the total number of shares of Preferred Stock and/or
equivalent preferred stock so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such Current Market Price, and the denominator of which shall be the number
of shares of Preferred Stock outstanding on such record date, plus the number
of additional shares of Preferred Stock and/or equivalent preferred stock to be
offered for subscription or purchase (or into which the convertible securities
so to be offered are initially convertible).  In case such subscription price
may be paid by delivery of consideration part or all of which may be 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 and shall be binding on the Rights Agent and the holders
of the Rights.  Shares of Preferred Stock owned by or held for the account of
the Company shall not be deemed outstanding for the purpose of any such
computation.  Such adjustment shall be made successively whenever such a record
date is fixed, and in the event that such rights or warrants are not so issued,
the Purchase Price shall be adjusted to be the Purchase Price which would then
be in effect if such record date had not been fixed.

                          (c)  In case the Company shall fix a record date for
a distribution to all holders of Preferred Stock (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing corporation) of evidences of indebtedness, cash
(other than a regular quarterly cash dividend out of the earnings or retained
earnings of the Company), assets (other than a dividend payable in Preferred
Stock, but including any dividend payable in stock other than Preferred Stock)
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 shall
be determined by multiplying the Purchase Price in effect immediately prior to
such record date by a fraction, the numerator of which shall be the




                                      20
                                        
<PAGE>   24

Current Market Price (as determined pursuant to Section 11(d) hereof) per share
of Preferred Stock on such record date, less the fair market value (as
determined in good faith by the Board, whose determination shall be described
in a statement filed with the Rights Agent) of the portion of the cash, assets
or evidences of indebtedness so to be distributed or of such subscription
rights or warrants applicable to a share of Preferred Stock and the denominator
of which shall be such Current Market Price (as determined pursuant to Section
11(d) hereof) per share of Preferred Stock.  Such adjustments shall be made
successively whenever such a record date is fixed, and in the event that such
distribution is not so made, the Purchase Price shall be adjusted to be the
Purchase Price which would have been in effect if such record date had not been
fixed.

                          (d)  (i)  For the purpose of any computation
hereunder, other than computations made pursuant to Section 11(a)(iii) hereof,
the "Current Market Price" per share of Common Stock on any date shall be
deemed to be the average of the daily closing prices per share of such Common
Stock for the thirty (30) consecutive Trading Days (as such term is hereinafter
defined) immediately prior to such date, and for purposes of computations made
pursuant to Section 11(a)(iii) hereof, the "Current Market Price" per share of
Common Stock on any date shall be deemed to be the average of the daily closing
prices per share of such Common Stock for the ten (10) consecutive Trading Days
immediately following such date; provided, however, that in the event that the
Current Market Price per share of the Common Stock is determined during a
period following the announcement by the issuer of such Common Stock of (A) a
dividend or distribution on such Common Stock payable in shares of such Common
Stock or securities convertible into shares of such Common Stock (other than
the Rights), or (B) any subdivision, combination or reclassification of such
Common Stock, and the ex-dividend date for such dividend or distribution, or
the record date for such subdivision, combination or reclassification shall not
have occurred prior to the commencement of the requisite thirty (30) Trading
Day or ten (10) Trading Day period, as set forth above, then, and in each such
case, the Current Market Price shall be properly adjusted to take into account
ex-dividend trading.  The closing price for each day shall be 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 (the "NYSE") or, if the




                                      21
                                        
<PAGE>   25

shares of Common Stock are not listed or admitted to trading on the NYSE, as
reported in the principal consolidated transaction reporting system with
respect to securities listed on the principal national securities exchange on
which the shares of Common Stock are listed or admitted to trading or, if the
shares of Common Stock 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 over-the-counter market, as reported
by the National Association of Securities Dealers, Inc. Automated Quotation
System ("NASDAQ") or such other system then in use, or, if on any such date the
shares of Common Stock 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 Common Stock selected by the Board.  If on any such date
no market maker is making a market in the Common Stock, the fair value of such
shares on such date as determined in good faith by the Board shall be used.
The term "Trading Day" shall mean a day on which the principal national
securities exchange on which the shares of Common Stock are listed or admitted
to trading is open for the transaction of business or, if the shares of Common
Stock are not listed or admitted to trading on any national securities
exchange, a Business Day.  If the Common Stock is not publicly held or not so
listed or traded, Current Market Price per share shall mean the fair value per
share as determined in good faith by the Board, whose determination shall be
described in a statement filed with the Rights Agent and shall be conclusive
for all purposes.

                          (ii)  For the purpose of any computation hereunder,
the Current Market Price per share of Preferred Stock shall be determined in
the same manner as set forth above for the Common Stock in clause (i) of this
Section 11(d) (other than the last sentence thereof).  If the Current Market
Price per share of Preferred Stock cannot be determined in the manner provided
above or if the Preferred Stock is not publicly held or listed or traded in a
manner described in clause (i) of this Section 11(d), the Current Market Price
per share of Preferred Stock shall be conclusively deemed to be an amount equal
to 1,000 (as such number may be appropriately adjusted for such events as stock
splits, stock dividends and recapitalizations with respect to the Common Stock
occurring after the date of this Agreement) multiplied by the Current Market
Price per share of the Common Stock.  If neither the Common Stock nor the
Preferred Stock is publicly held or so listed or traded, Current Market Price
per share of the Preferred Stock shall mean the fair value per share as
determined in good faith by the Board, whose determination shall be described
in a statement filed with the Rights Agent and shall be conclusive for all
purposes.  For all purposes of this Agreement, the Current Market Price of one
one-thousandth of a share of Preferred Stock shall be equal to the Current
Market Price of one share of Preferred Stock divided by 1,000.

                          (e)  Anything herein to the contrary notwithstanding,
no adjustment in the Purchase Price shall be required unless such adjustment
would



                                      22

                                        
<PAGE>   26

require an increase or decrease of at least one percent (1%) in the Purchase
Price; provided, however, that any adjustments which by reason of this Section
11(e) are not required to be made shall be carried forward and taken into
account in any subsequent adjustment.  All calculations under this Section 11
shall be made to the nearest cent or to the nearest ten-thousandth of a share
of Common Stock or other share or one ten-millionth of a share of Preferred
Stock, as the case may be.  Notwithstanding the first sentence of this Section
11(e), any adjustment required by this Section 11 shall be made no later than
the earlier of (i) three (3) years from the date of the transaction which
mandates such adjustment, or (ii) the Expiration Date.

                          (f)  If as a result of an adjustment made pursuant to
Section 11(a)(ii) or Section 13(a) hereof, the holder of any Right thereafter
exercised shall become entitled to receive any shares of capital stock other
than Preferred Stock, thereafter the number of such other shares so receivable
upon exercise of any Right and the Purchase Price thereof shall 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 Stock contained in
Sections 11(a), (b), (c), (e), (g), (h), (i), (j), (k) and (m), and the
provisions of Sections 7, 9, 10, 13 and 14 hereof with respect to the Preferred
Stock shall 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 shall
evidence the right to purchase, at the adjusted Purchase Price, the number of
one one-thousandths of a share of Preferred Stock purchasable from time to time
hereunder upon exercise of the Rights, all subject to further adjustment as
provided herein.

                          (h)  Unless the Company shall have 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 shall
thereafter evidence the right to purchase, at the adjusted Purchase Price, that
number of one one-thousandths of a share of Preferred Stock (calculated to the
nearest one ten-millionth) obtained by (i) multiplying (x) the number of one
one-thousandths 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 lieu of
any




                                      23
                                        
<PAGE>   27

adjustment in the number of one one-thousandths of a share of Preferred Stock
purchasable upon the exercise of a Right.  Each of the Rights outstanding after
the adjustment in the number of Rights shall be exercisable for the number of
one one-thousandths of a share of Preferred Stock 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 shall 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 Price is adjusted or any day thereafter,
but, if the Rights Certificates have been issued, shall be at least ten (10)
days later than the date of the public announcement.  If Rights 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 Rights Certificates on such record date
Rights Certificates evidencing, subject to Section 14 hereof, the additional
Rights to which such holders shall 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 Rights Certificates held by
such holders prior to the date of adjustment, and upon surrender thereof, if
required by the Company, new Rights Certificates evidencing all the Rights to
which such holders shall be entitled after such adjustment.  Rights
Certificates so to be distributed shall be issued, executed and countersigned
in the manner provided for herein (and may bear, at the option of the Company,
the adjusted Purchase Price) and shall be registered in the names of the
holders of record of Rights 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-thousandths of a share of Preferred
Stock issuable upon the exercise of the Rights, the Rights Certificates
theretofore and thereafter issued may continue to express the Purchase Price
per one one-thousandth of a share and the number of one one-thousandths of a
share which were expressed in the initial Rights Certificates issued hereunder.

                          (k)  Before taking any action that would cause an
adjustment reducing the Purchase Price below the then stated value, if any, of
the number of one one-thousandths of a share of Preferred Stock issuable upon
exercise of the Rights,



                                      24

                                        
<PAGE>   28

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 such number of one one-thousandths of a share of
Preferred Stock at such adjusted Purchase Price.

                          (l)  In any case in which this Section 11 shall
require 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 issuance to the holder of any Right exercised
after such record date the number of one one-thousandths of a share of
Preferred Stock and other capital stock or securities of the Company, if any,
issuable upon such exercise over and above the number of one one-thousandths of
a share of Preferred Stock 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 (fractional or otherwise)
or securities upon the occurrence of the event requiring such adjustment.

                          (m)  Anything in this Section 11 to the contrary
notwithstanding, the Company shall be 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 in their good faith judgment the Board
shall determine to be advisable in order that any (i) consolidation or
subdivision of the Preferred Stock, (ii) issuance wholly for cash of any shares
of Preferred Stock at less than the Current Market Price, (iii) issuance wholly
for cash of shares of Preferred Stock or securities which by their terms are
convertible into or exchangeable for shares of Preferred Stock, (iv) stock
dividends or (v) issuance of rights, options or warrants referred to in this
Section 11, hereafter made by the Company to holders of its Preferred Stock
shall not be taxable to such stockholders.

                          (n)  The Company covenants and agrees that it shall
not, at any time after the Distribution Date, (i) consolidate with any other
Person (other than a Subsidiary of the Company in a transaction which complies
with Section 11(o) hereof), (ii) merge with or into any other Person (other
than a Subsidiary of the Company in a transaction which complies with Section
11(o) hereof), or (iii) sell or transfer (or permit any Subsidiary to sell or
transfer), in one transaction, or a series of related transactions, assets or
earning power aggregating more than 50% of the assets or earning power of the
Company and its Subsidiaries (taken as a whole) to any other Person or Persons
(other than the Company and/or any of its Subsidiaries in one or




                                      25
                                        
<PAGE>   29

more transactions each of which complies with Section 11(o) hereof), if (x) at
the time of or immediately after such consolidation, merger or sale there are
any rights, warrants or other instruments or securities outstanding or
agreements in effect which would substantially diminish or otherwise eliminate
the benefits intended to be afforded by the Rights or (y) prior to,
simultaneously with or immediately after such consolidation, merger or sale,
the stockholders of the Person who constitutes, or would constitute, the
"Principal Party" for purposes of Section 13(a) hereof shall have received a
distribution of Rights previously owned by such Person or any of its Affiliates
and Associates.

                          (o)  The Company covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23 or Section 26
hereof, take (or permit any Subsidiary to take) any action if at the time such
action is taken it is reasonably foreseeable that such action will diminish
substantially or otherwise eliminate the benefits intended to be afforded by
the Rights.

                          (p)  Anything in this Agreement to the contrary
notwithstanding, in the event that the Company shall at any time after the
Rights Dividend Declaration Date and prior to the Distribution Date (i) declare
a dividend on the outstanding shares of Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding shares of Common Stock, or (iii)
combine the outstanding shares of Common Stock into a smaller number of shares,
the number of Rights associated with each share of Common Stock then
outstanding, or issued or delivered thereafter but prior to the Distribution
Date, shall be proportionately adjusted so that the number of Rights thereafter
associated with each share of Common Stock following any such event shall equal
the result obtained by multiplying the number of Rights associated with each
share of Common Stock immediately prior to such event by a fraction the
numerator which shall be the total number of shares of Common Stock outstanding
immediately prior to the occurrence of the event and the denominator of which
shall be the total number of shares of Common Stock outstanding immediately
following the occurrence of such event.

                 Section 12.  Certificate of Adjusted Purchase Price or Number
of Shares.  Whenever an adjustment is made as provided in Section 11 and
Section 13 hereof, the Company shall (a) promptly prepare a certificate setting
forth such adjustment and a brief statement of the facts accounting for such
adjustment, (b) promptly file with the Rights Agent, and with each transfer
agent for the Preferred Stock and the Common Stock, a copy of such certificate,
and (c) if a Distribution Date has occurred, mail a brief summary thereof to
each holder of a Rights Certificate



                                      26

                                        
<PAGE>   30

in accordance with Section 25 hereof.  The Rights Agent shall be fully
protected in relying on any such certificate and on any adjustment therein
contained.

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

                          (a)  In the event that, following the Stock
Acquisition Date, directly or indirectly, (x) the Company shall consolidate
with, or merge with and into, any other Person (other than a Subsidiary of the
Company in a transaction which complies with Section 11(o) hereof), and the
Company shall not be the continuing or surviving corporation of such
consolidation or merger, (y) any Person (other than a Subsidiary of the Company
in a transaction which complies with Section 11(o) hereof) shall consolidate
with, or merge with or into, the Company, and the Company shall be the
continuing or surviving corporation of such consolidation or merger and, in
connection with such consolidation or merger, all or part of the outstanding
shares of Common Stock shall be changed into or exchanged for stock or other
securities of any other Person or cash or any other property, or (z) the
Company shall sell or otherwise transfer (or one or more of its Subsidiaries
shall sell or otherwise transfer), in one transaction or a series of related
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
Person or Persons (other than the Company or any Subsidiary of the Company in
one or more transactions each of which complies with Section 11(o) hereof),
then, and in each such case (except as may be contemplated by Section 13(d)
hereof), proper provision shall be made so that:  (i) each holder of a Right,
except as provided in Section 7(e) hereof, shall thereafter have the right to
receive, upon the exercise thereof at the then current Purchase Price in
accordance with the terms of this Agreement, such number of validly authorized
and issued, fully paid, non-assessable and freely tradeable shares of Common
Stock of the Principal Party (as such term is hereinafter defined), not subject
to any liens, encumbrances, rights of first refusal or other adverse claims, as
shall be equal to the result obtained by (1) multiplying the then current
Purchase Price by the number of one one-thousandths of a share of Preferred
Stock for which a Right is exercisable immediately prior to the first
occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has occurred
prior to the first occurrence of a Section 13 Event, multiplying the number of
such one one-thousandths of a share for which a Right was exercisable
immediately prior to the first occurrence of a Section 11(a)(ii) Event by the
Purchase Price in effect immediately prior to such first occurrence), and
dividing that product (which, following the first occurrence of a Section 13
Event, shall be referred to as the "Purchase Price" for each Right and for all
purposes of this Agreement) by (2) 50% of the current market price (determined
pursuant to Section 11(d)(i)




                                      27
                                        
<PAGE>   31

hereof) per share of the Common Stock of such Principal Party on the date of
consummation of such Section 13 Event; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such Section 13 Event,
all the obligations and duties of the Company pursuant to this Agreement; (iii)
the term "Company" shall thereafter be deemed to refer to such Principal Party,
it being specifically intended that the provisions of Section 11 hereof shall
apply only to such Principal Party following the first occurrence of a Section
13 Event; (iv) such Principal Party shall take such steps (including, but not
limited to, the reservation of a sufficient number of shares of its Common
Stock) in connection with the consummation of any such transaction as may be
necessary to assure that the provisions hereof shall thereafter be applicable,
as nearly as reasonably may be, in relation to its shares of Common Stock
thereafter deliverable upon the exercise of the Rights; and (v) the provisions
of Section 11(a)(ii) hereof shall be of no effect following the first
occurrence of any Section 13 Event.

                          (b)  "Principal Party" shall mean

                                  (i)  in the case of any transaction described
         in clause (x) or (y) of the first sentence of Section 13(a), the
         Person that is the issuer of any securities into which shares of
         Common Stock of the Company are converted in such merger or
         consolidation, and if no securities are so issued, the Person that is
         the other party to such merger or consolidation; and

                                  (ii)  in the case of any transaction
         described in clause (z) of the first sentence of Section 13(a), the
         Person that is the party receiving the greatest portion of the assets
         or earning power transferred pursuant to such transaction or
         transactions;

provided, however, that in any such case, (1) if the Common Stock of such Person
is not at such time and has not been continuously over the preceding twelve (12)
month period registered under Section 12 of the Exchange Act, and such Person is
a direct or indirect Subsidiary of another Person the Common Stock of which is
and has been so registered, "Principal Party" shall refer to such other Person;
and (2) in case such Person is a Subsidiary, directly or indirectly, of more
than one Person, the Common Stocks of two or more of which are and have been so
registered, "Principal Party" shall refer to whichever of such Persons is the
issuer of the Common Stock having the greatest aggregate market value.



                                      28

 
<PAGE>   32


                          (c)  The Company shall not consummate any such
consolidation, merger, sale or transfer unless the Principal Party shall have a
sufficient number of authorized shares of its Common Stock which have not been
issued or reserved for issuance to permit the exercise in full of the Rights in
accordance with this Section 13 and unless prior thereto the Company and such
Principal Party shall have executed and delivered to the Rights Agent a
supplemental agreement providing for the terms set forth in paragraphs (a) and
(b) of this Section 13 and further providing that, as soon as practicable after
the date of any consolidation, merger or sale of assets mentioned in paragraph
(a) of this Section 13, the Principal Party will

                                  (i)  prepare and file a registration
         statement under the Act, with respect to the Rights and the securities
         purchasable upon exercise of the Rights on an appropriate form, and
         will use its best efforts to cause such registration statement to (A)
         become effective as soon as practicable after such filing and (B)
         remain effective (with a prospectus at all times meeting the
         requirements of the Act) until the Expiration Date; and

                                  (ii)  will deliver to holders of the Rights
         historical financial statements for the Principal Party and each of
         its Affiliates which comply in all respects with the requirements for
         registration on Form 10 under the Exchange Act.

The provisions of this Section 13 shall similarly apply to successive mergers
or consolidations or sales or other transfers.  In the event that a Section 13
Event shall occur at any time after the occurrence of a Section 11(a)(ii)
Event, the Rights which have not theretofore been exercised shall thereafter
become exercisable in the manner described in Section 13(a).

                          (d)  Notwithstanding anything in this Agreement to
the contrary, Section 13 shall not be applicable to a transaction described in
subparagraphs (x) and (y) of Section 13(a) if (i) such transaction is
consummated with a Person or Persons who acquired shares of Common Stock
pursuant to a tender offer or exchange offer for all outstanding shares of
Common Stock which complies with the provisions of Section 11(a)(ii) hereof (or
a wholly owned subsidiary of any such Person or Persons), (ii) the price per
share of Common Stock offered in such transac tion is not less than the price
per share of Common Stock paid to all holders of shares of Common Stock whose
shares were purchased pursuant to such tender offer or



                                      29

                                        
<PAGE>   33

exchange offer, and (iii) the form of consideration being offered to the
remaining holders of shares of Common Stock pursuant to such transaction is the
same as the form of consideration paid pursuant to such tender offer or
exchange offer.  Upon consummation of any such transaction contemplated by this
Section 13(d), all Rights hereunder shall expire.

                 Section 14.  Fractional Rights and Fractional Shares.

                          (a)  The Company shall not be required to issue
fractions of Rights, except prior to the Distribution Date as provided in
Section 11(p) hereof, or to distribute Rights Certificates which evidence
fractional Rights.  In lieu of such fractional Rights, there shall be paid to
the registered holders of the Rights Certificates with regard to which such
fractional Rights would otherwise be issuable, an amount in cash equal to the
same fraction of the current market value of a whole Right.  For purposes of
this Section 14(a), the current market value of a whole Right shall be 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 of the Rights for any day shall be 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 NYSE or, if the Rights are not listed or
admitted to trading on the NYSE, 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 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 fair value of the Rights on such date as
determined in good faith by the Board shall be used.

                          (b)  The Company shall not be required to issue
fractions of shares of Preferred Stock (other than fractions which are integral
multiples of one one-thousandth of a share of Preferred Stock) upon exercise of
the Rights or to distribute certificates which evidence fractional shares of
Preferred Stock (other than fractions which are integral multiples of one
one-thousandth of a share of Preferred Stock).  In lieu of fractional shares of
Preferred Stock that are not integral multiples of




                                      30
                                        
<PAGE>   34

one one-thousandth of a share of Preferred Stock, the Company may pay to the
registered holders of Rights Certificates at the time such Rights are exercised
as herein provided an amount in cash equal to the same fraction of the current
market value of one one-thousandth of a share of Preferred Stock.  For purposes
of this Section 14(b), the current market value of one one-thousandth of a
share of Preferred Stock shall be one one-thousandth of the closing price of a
share of Preferred Stock (as determined pursuant to Section 11(d)(ii) hereof)
for the Trading Day immediately prior to the date of such exercise.

                          (c)  Following the occurrence of a Triggering Event,
the Company shall not be required to issue fractions of shares of Common Stock
upon exercise of the Rights or to distribute certificates which evidence
fractional shares of Common Stock.  In lieu of fractional shares of Common
Stock, the Company may pay to the registered holders of Rights Certificates at
the time such Rights are exercised as herein provided an amount in cash equal
to the same fraction of the current market value of one (1) share of Common
Stock.  For purposes of this Section 14(c), the current market value of one
share of Common Stock shall be the closing price of one share of Common Stock
(as determined pursuant to Section 11(d)(i) hereof) for the Trading Day
immediately prior to the date of such exercise.

                          (d)  The holder of a Right by the acceptance of the
Rights expressly waives his right to receive any fractional Rights or any
fractional shares upon exercise of a Right, except as permitted by this Section
14.

                 Section 15.  Rights of Action.  All rights of action in
respect of this Agreement are vested in the respective registered holders of
the Rights Certificates (and, prior to the Distribution Date, the registered
holders of the Common Stock); and any registered holder of any Rights
Certificate (or, prior to the Distribution Date, of the Common Stock), without
the consent of the Rights Agent or of the holder of any other Rights
Certificate (or, prior to the Distribution Date, of the Common Stock), may, in
the holder's own behalf and for the holder's own benefit, 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 Rights Certificate in the manner provided in such
Rights 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 shall be entitled to specific
performance of the obligations hereunder and injunctive relief against actual



                                      31

                                        
<PAGE>   35

or threatened violations of the obligations hereunder of any Person subject to
this Agreement.

                 Section 16.  Agreement of Rights 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 Common Stock;

                          (b)  after the Distribution Date, the Rights
Certificates are transferable only on the registry books of the Rights Agent if
surrendered at the principal office or offices of the Rights Agent designated
for such purposes, duly endorsed or accompanied by a proper instrument of
transfer and with the appropriate forms and certificates fully executed;

                          (c)  subject to Section 6(a) and Section 7(f) hereof,
the Company and the Rights Agent may deem and treat the person in whose name a
Rights Certificate (or, prior to the Distribution Date, the associated Common
Stock certificate) is registered as the absolute owner thereof and of the
Rights evidenced thereby (notwithstanding any notations of ownership or writing
on the Rights Certificates or the associated Common Stock certificate made by
anyone other than the Company or the Rights Agent) for all purposes whatsoever,
and neither the Company nor the Rights Agent, subject to the last sentence of
Section 7(e) hereof, shall be required to be affected by any notice to the
contrary; and

                          (d)  notwithstanding anything in this Agreement to
the contrary, neither the Company nor the Rights Agent shall have any liability
to any holder of a Right or other Person as a result of its inability to
perform any of its obligations under this Agreement by reason of any
preliminary or permanent injunction or other order, decree or ruling issued by
a court of competent jurisdiction or by a governmental, regulatory or
administrative agency or commission, or any statute, rule, regulation or
executive order promulgated or enacted by any governmental authority,
prohibiting or otherwise restraining performance of such obligation; provided,
however, the Company must use its best efforts to have any such order, decree
or ruling lifted or otherwise overturned as soon as possible.

                 Section 17.  Rights Certificate Holder Not Deemed a
Stockholder.  No holder, as such, of any Rights Certificate shall be entitled
to vote, receive dividends or



                                      32

                                        
<PAGE>   36

be deemed for any purpose the holder of the number of one one-thousandths of a
share of Preferred Stock or any other securities of the Company which may at
any time be issuable on the exercise of the Rights represented thereby, nor
shall anything contained herein or in any Rights Certificate be construed to
confer upon the holder of any Rights Certificate, as such, any of the rights of
a stockholder of the Company or any right to vote for the election of directors
or upon any matter submitted to stockholders at any meeting thereof, or to give
or withhold consent to any corporate action, or to receive notice of meetings
or other actions affecting stockholders (except as provided in Section 24
hereof), or to receive dividends or subscription rights, or otherwise, until
the Right or Rights evidenced by such Rights Certificate shall have been
exercised in accordance with the provisions hereof.

                 Section 18.  Concerning the Rights Agent.

                          (a)  The Company agrees to pay to the Rights Agent
reasonable compensation for all services rendered by it hereunder and, from
time to time, on demand of the Rights Agent, its reasonable expenses and
counsel fees and disbursements 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.

                          (b)  The Rights Agent shall be protected and shall
incur no liability for or in respect of any action taken, suffered or omitted
by it in connection with its administration of this Agreement in reliance upon
any Rights Certificate or certificate for Common Stock 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.



                                      33

                                        
<PAGE>   37


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

                        (a)  Any corporation into which the Rights Agent or
any successor Rights Agent may be merged or with which it may be consolidated,
or any corporation resulting from any merger or consolidation to which the
Rights Agent or any successor Rights Agent shall be a party, or any corporation
succeeding to the corporate trust or stock transfer business of the Rights
Agent or any successor Rights Agent, shall 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; provided, however, 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 shall succeed to the agency created by this Agreement, any of the
Rights Certificates shall have been countersigned but not delivered, any such
successor Rights Agent may adopt the countersignature of a predecessor Rights
Agent and deliver such Rights Certificates so countersigned; and in case at
that time any of the Rights Certificates shall not have been countersigned, any
successor Rights Agent may countersign such Rights Certificates either in the
name of the predecessor or in the name of the successor Rights Agent; and in
all such cases such Rights Certificates shall have the full force provided in
the Rights Certificates and in this Agreement.

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

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



                                      34

                                        
<PAGE>   38

and complete 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 shall deem it necessary or desirable that any
fact or matter (including, without limitation, the identity of any Acquiring
Person and the determination of Current Market Price) 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 the Chairman of the Board, the Vice Chairman, the
President, any Vice President, the Treasurer, any Assistant Treasurer, the
Secretary or any Assistant Secretary of the Company and delivered to the Rights
Agent; and such certificate shall be full authorization to the Rights Agent for
any action taken or suffered in good faith by it under the provisions of this
Agreement in reliance upon such certificate.

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

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

                          (e)  The Rights Agent shall not be under any
responsibility in respect of the validity of this Agreement or the execution
and delivery hereof (except the due execution hereof by the Rights Agent) or in
respect of the validity or execution of any Rights Certificate (except its
countersignature thereof); nor shall it be responsible for any breach by the
Company of any covenant or condition contained in this Agreement or in any
Rights Certificate; nor shall it be responsible for any adjustment required
under the provisions of Section 11 or Section 13 hereof or responsible for the
manner, method or amount of any such adjustment or the ascertaining of the
existence of facts that would require any such adjustment (except with respect
to the exercise of Rights evidenced by Rights Certificates after actual notice
of any such adjustment); nor shall it by any act hereunder be deemed to make
any representation or warranty as to the authorization or reservation of any
shares of Common Stock or Preferred Stock to be issued pursuant to this
Agreement or any



                                      35

                                        
<PAGE>   39

Rights Certificate or as to whether any shares of Common Stock or Preferred
Stock will, when so 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 the Chairman of the Board, the Vice Chairman, the President, any
Vice President, the Secretary, any Assistant Secretary, the Treasurer or any
Assistant Treasurer of the Company, and to apply to such officers for advice or
instructions in connection with its duties, and it shall not be liable for any
action taken or suffered to be taken by it in good faith in accordance with
instructions of any such officer.

                          (h)  The Rights Agent and any stockholder, director,
officer or employee of the Rights Agent may buy, sell or deal in any of the
Rights or other securities of the Company or become pecuniarily interested in
any transaction in which the Company may be interested, or contract with or
lend money to the Company or otherwise act as fully and freely as though it
were not 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 shall not
be answerable or accountable for any act, default, neglect or misconduct of any
such attorneys or agents or for any loss to the Company resulting from any such
act, default, neglect or misconduct; provided, however, reasonable care was
exercised in the selection and continued employment thereof.

                          (j)  No provision of this Agreement shall require the
Rights Agent to expend or risk its own funds or otherwise incur any financial
liability in the performance of any of its duties hereunder or in the exercise
of its rights if there shall be reasonable grounds for believing that repayment
of such funds or adequate indemnification against such risk or liability is not
reasonably assured to it.



                                      36

                                        
<PAGE>   40


                        (k)  If, with respect to any Right Certificate
surrendered to the Rights Agent for exercise or transfer, the certificate
attached to the form of assignment or form of election to purchase, as the case
may be, has either not been completed or indicates an affirmative response to
clause 1 and/or 2 thereof, the Rights Agent shall not take any further action
with respect to such requested exercise of transfer without first consulting
with the Company.

                 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 thirty (30) days' notice in writing mailed to the Company, and
to each transfer agent of the Common Stock and Preferred Stock, by registered
or certified mail, and to the holders of the Rights Certificates by first-class
mail.  The Company may remove the Rights Agent or any successor Rights Agent
upon thirty (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 Stock and Preferred Stock, by registered or certified mail, and to the
holders of the Rights Certificates by first-class mail.  If the Rights Agent
shall resign or be removed or shall otherwise become incapable of acting, the
Company shall appoint a successor to the Rights Agent.  If the Company shall
fail to make such appointment within a period of thirty (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 Rights Certificate (who shall, with such notice, submit his
Rights Certificate for inspection by the Company), then any registered holder
of any Rights Certificate may apply to any court of competent jurisdiction for
the appointment of a new Rights Agent.  Any successor Rights Agent, whether
appointed by the Company or by such a court, shall be (a) a legal business
entity organized and doing business under the laws of the United States or of
the State of Michigan (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 Michigan), in good standing, having a principal office in the State of
Michigan, 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 $100,000,000 or (b) an affiliate of
a legal business entity described in clause (a) of this sentence.  After
appointment, the successor Rights Agent shall be vested with the same powers,
rights, duties and responsibilities as if it had been originally named as
Rights Agent without further act or deed; but the predecessor Rights Agent
shall deliver and transfer to the successor Rights Agent any property at the
time held by it hereunder, and execute and deliver any further assurance,
conveyance, act or deed necessary for the purpose.  Not later



                                      37

                                        
<PAGE>   41

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 Stock and the Preferred Stock, and mail a notice thereof in writing
to the registered holders of the Rights Certificates.  Failure to give any
notice provided for in this Section 21, however, or any defect therein, shall
not affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

                 Section 22.  Issuance of New Rights Certificates.
Notwithstanding any of the provisions of this Agreement or of the Rights to the
contrary, the Company may, at its option, issue new Rights Certificates
evidencing Rights in such form as may be approved by its Board to reflect any
adjustment or change in the Purchase Price and the number or kind or class of
shares or other securities or property purchasable under the Rights
Certificates made in accordance with the provisions of this Agreement.  In
addition, in connection with the issuance or sale of shares of Common Stock
following the Distribution Date and prior to the redemption or expiration of
the Rights, the Company (a) shall, with respect to shares of Common Stock so
issued or sold pursuant to the exercise of stock options or under any employee
plan or arrangement or upon the exercise, conversion or exchange of securities
hereinafter issued by the Company, and (b) may, in any other case, if deemed
necessary or appropriate by the Board of Directors of the Company, issue Rights
Certificates representing the appropriate number of Rights in connection with
such issuance or sale; provided, however, that (i) no such Rights Certificate
shall be issued if, and to the extent that, the Company shall be advised by
counsel that such issuance would create a significant risk of material adverse
tax consequences to the Company or the Person to whom such Rights Certificate
would be issued, and (ii) no such Rights Certificate shall be issued if, and to
the extent that, appropriate adjustment shall otherwise have been made in lieu
of the issuance thereof.

                 Section 23.  Redemption and Termination.

                        (a)  The Board of Directors of the Company may, at
its option, at any time prior to the earlier of (i) the time that any Person
becomes an Acquiring Person, or (ii) the close of business on the Final
Expiration Date, redeem all but not less than all the then outstanding Rights
at a redemption price of $.01 per Right, as such amount may be 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 Company may, at its option, pay
the Redemption Price in cash, shares of Common Stock (based on the Current



                                      38

                                        
<PAGE>   42

Market Price, as defined in Section 11(d)(i) hereof, of the Common Stock at the
time of redemption) or any other form of consideration deemed appropriate by
the Board.

                        (b)  Immediately upon the action of the Board of
Directors of the Company ordering the redemption of the Rights, evidence of
which shall have been filed with the Rights Agent and without any further
action and without any notice, the right to exercise the Rights will terminate
and the only right thereafter of the holders of Rights shall be to receive the
Redemption Price for each Right so held.  Promptly after the action of the
Board ordering the redemption of the Rights, the Company shall give notice of
such redemption to the Rights Agent and the holders of the then outstanding
Rights by mailing such notice to all such holders at each holder's last address
as it appears 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
Stock.  Any notice which is mailed in the manner herein provided shall be
deemed given, whether or not the holder receives the notice.  Each such notice
of redemption will state the method by which the payment of the Redemption
Price will be made.

                 Section 24.  Notice of Certain Events.

                        (a)  In case the Company shall propose, at any time
after the Distribution Date, (i) to pay any dividend payable in stock of any
class to the holders of Preferred Stock or to make any other distribution to
the holders of Preferred Stock (other than a regular quarterly cash dividend
out of earnings or retained earnings of the Company), or (ii) to offer to the
holders of Preferred Stock rights or warrants to subscribe for or to purchase
any additional shares of Preferred Stock or shares of stock of any class or any
other securities, rights or options, or (iii) to effect any reclassification of
its Preferred Stock (other than a reclassification involving only the
subdivision of outstanding shares of Preferred Stock), or (iv) to effect any
consolidation or merger into or with any other Person (other than a Subsidiary
of the Company in a transaction which complies with Section 11(o) hereof), 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 transaction or a
series of related 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 or
Persons (other than the Company and/or any of its Subsidiaries in one or more
transactions each of which complies with Section 11(o) hereof), or (v) to
effect the liquidation, dissolution or winding up of the Company, then, in each
such case, the Company shall give to each holder of a Rights Certificate, to
the extent feasible and in accordance with Section 25 hereof, a notice of such
proposed action, which shall specify the record date for the purposes of such
stock dividend,



                                      39

                                        
<PAGE>   43

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
shares of Preferred Stock, if any such date is to be fixed, and such notice
shall be so given in the case of any action covered by clause (i) or (ii) above
at least twenty (20) days prior to the record date for determining holders of
the shares of Preferred Stock for purposes of such action, and in the case of
any such other action, at least twenty (20) days prior to the date of the
taking of such proposed action or the date of participation therein by the
holders of the shares of Preferred Stock whichever shall be the earlier.

                         (b)  In case any of the events set forth in Section
11(a)(ii) hereof shall occur, then, in any such case, (i) the Company shall as
soon as practicable thereafter give to each holder of a Rights Certificate, to
the extent feasible and in accordance with Section 25 hereof, a notice of the
occurrence of such event, which shall specify the event and the consequences of
the event to holders of Rights under Section 11(a)(ii) hereof, and (ii) all
references in the preceding paragraph to Preferred Stock shall be deemed
thereafter to refer to Common Stock and/or, if appropriate, other securities.

                 Section 25.  Notices.  Notices or demands authorized by this
Agreement to be given or made by the Rights Agent or by the holder of any
Rights Certificate to or on the Company shall be 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:

                          Comerica Incorporated
                          500 Woodward, 33d Floor
                          Detroit, Michigan  48226
                          Attention:  Corporate Secretary

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement to be given or made by the Company or by the holder of any Rights
Certificate to or on the Rights Agent shall be sufficiently given or made if
sent by first-class mail, postage prepaid, addressed (until another address is
filed in writing with the Company) as follows:

                          Comerica Bank
                          500 Woodward, 33d Floor
                          Detroit, Michigan  48226



                                      40
                                        
<PAGE>   44

                          Attention:  Corporate Secretary

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

                 Section 26.  Supplements and Amendments.  Prior to the
Distribution Date, the Company and the Rights Agent shall, if the Company so
directs, supplement or amend any provision of this Agreement without the
approval of any holders of certificates representing shares of Common Stock.
From and after the Distribution Date, the Company and the Rights Agent shall,
if the Company so directs, supplement or amend this Agreement without the
approval of any holders of Rights Certificates in order (i) to cure any
ambiguity, (ii) to correct or supplement any provision contained herein which
may be defective or inconsistent with any other provisions herein, (iii) to
shorten or lengthen any time period hereunder, or (iv) to change or supplement
the provisions hereunder in any manner which the Company may deem necessary or
desirable and which shall not adversely affect the interests of the holders of
Rights Certificates (other than an Acquiring Person or an Affiliate or
Associate of an Acquiring Person); provided, this Agreement may not be
supplemented or amended to lengthen, pursuant to clause (iii) of this sentence,
(A) a time period relating to when the Rights may be redeemed at such time as
the Rights are not then redeemable, or (B) any other time period unless such
lengthening is for the purpose of protecting, enhancing or clarifying the
rights of, and/or the benefits to, the holders of Rights.  Upon the delivery of
a certificate from an appropriate officer of the Company which states that the
proposed supplement or amendment is in compliance with the terms of this
Section 26, the Rights Agent shall execute such supplement or amendment.  Prior
to the Distribution Date, the interests of the holders of Rights shall be
deemed coincident with the interests of the holders of Common Stock.

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

                 Section 28.  Determinations and Actions by the Board of
Directors, etc.  For all purposes of this Agreement, any calculation of the
number of shares of Common Stock outstanding at any particular time, including
for purposes of



                                      41

                                        
<PAGE>   45

determining the particular percentage of such outstanding shares of Common
Stock of which any Person is the Beneficial Owner, shall be made in accordance
with the last sentence of Rule 13d 3(d)(1)(i) of the General Rules and
Regulations under the Exchange Act.  The Board shall have the exclusive power
and authority to administer this Agreement and to exercise all rights and
powers specifically granted to the Board or to the Company, or as may be
necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including a determination to redeem or
not redeem the Rights or to amend the Agreement).  All such actions,
calculations, interpretations and determinations (including, for purposes of
clause (y) below, all omissions with respect to the foregoing) which are done
or made by the Board in good faith, shall (x) be final, conclusive and binding
on the Company, the Rights Agent, the holders of the Rights and all other
parties, and (y) not subject the Board to any liability to the holders of the
Rights.

                 Section 29.  Benefits of this Agreement.  Nothing in this
Agreement shall be construed to give to any Person other than the Company, the
Rights Agent and the registered holders of the Rights Certificates (and, prior
to the Distribution Date, registered holders of the Common Stock) any legal or
equitable right, remedy or claim under this Agreement; but this Agreement shall
be for the sole and exclusive benefit of the Company, the Rights Agent and the
registered holders of the Rights Certificates (and, prior to the Distribution
Date, registered holders of the Common Stock).

                 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 shall remain in
full force and effect and shall in no way be affected, impaired or invalidated;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant or restriction is held by such
court or authority to be invalid, void or unenforceable and the Board
determines in its good faith judgment that severing the invalid language from
this Agreement would adversely affect the purpose or effect of this Agreement,
the right of redemption set forth in Section 23 hereof shall be reinstated and
shall not expire until the close of business on the tenth day following the
date of such determination by the Board.  Without limiting the foregoing, if
any provision requiring a determination to be made by (or with the concurrence
of) less than the entire Board is held by any court of competent jurisdiction
or other authority



                                      42

                                        
<PAGE>   46

to be invalid, void or unenforceable, such determination shall then be made by
the Board in accordance with applicable law and the Company's Restated
Certificate of Incorporation and Bylaws.

                 Section 31.  Governing Law.  This Agreement, each Right and
each Rights Certificate issued hereunder shall be deemed to be a contract made
under the laws of the State of Delaware and for all purposes shall be governed
by and construed in accordance with the laws of such State applicable to
contracts made and to be performed entirely within such State, except for
Sections 18, 19, 20 and 21 hereof which for all purposes shall be governed by
and construed under the laws of the State of Michigan.

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

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



                                      43

                                        
<PAGE>   47


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

     Attest:                                         COMERICA INCORPORATED


     By ________________________________             By _______________________
     Name: Kim Fulgenzi                              Name:  Mark W. Yonkman 
     Title: Assistant Vice President and             Title: Vice President and 
     Assistant Secretary                             Assistant Secretary

     Attest:                                         COMERICA BANK


     By ________________________________             By _______________________
     Name: Kim Fulgenzi                              Name:  Michael T. Monahan  
     Title: Assistant Vice President and             Title: President
     Assistant Secretary




                                      44
                                        
<PAGE>   48




                                                                       Exhibit A


                                    FORM OF
                    CERTIFICATE OF DESIGNATION, PREFERENCES
                             AND RIGHTS OF SERIES D
                         PARTICIPATING PREFERRED STOCK

                             COMERICA INCORPORATED


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


                 We, Eugene A. Miller, Chairman and Chief Executive Officer and
Mark W. Yonkman, Vice President and Assistant Secretary, of Comerica
Incorporated, a corporation organized and existing under the General
Corporation Law of the State of Delaware, in accordance with the provisions of
Section 103 thereof, DO HEREBY CERTIFY:

                 That pursuant to the authority conferred upon the Board of
Directors by the Restated Certificate of Incorporation of the said Corporation,
the said Board of Directors on May 17, 1996, adopted the following resolution
creating a series of 250,000 shares of Preferred Stock designated as Series D
Participating Preferred Stock:

                 RESOLVED, that pursuant to the authority vested in the Board
of Directors of this Corporation in accordance with the provisions of its
Restated Certificate of Incorporation, a series of Preferred Stock of the
Corporation be, and it hereby is, created and that the designation and amount
thereof and the voting powers, preferences and relative, participating,
optional and other special rights of the shares of such series and the
qualifications, limitations or restrictions thereof are as follows:





                                        
<PAGE>   49


                 Section 1.  Designation and Amount.  The shares of such series
shall be designated as "Series D Participating Preferred Stock" and the number
of shares constituting such series shall be 250,000.

                 Section 2.  Dividends and Distributions.

                 (A)  The dividend rate on the shares of Series D Participating
Preferred Stock for each quarterly dividend period (hereinafter referred to as
a "quarterly dividend period"), which quarterly dividend periods shall commence
on January 1, April 1, July 1 and October 1 in each year (each such date being
referred to herein as a "Quarterly Dividend Payment Date") (or in the case of
original issuance, from the date of original issuance) and shall end on and
include the day next preceding the first date of the next quarterly dividend
period, shall be equal (rounded to the nearest cent) to the greater of (a) $10
or (b) subject to the provision for adjustment hereinafter set forth, 1,000
times the aggregate per share amount of all cash dividends, and 1,000 times the
aggregate per share amount (payable in cash, based upon the fair market value
at the time the non-cash dividend or other distribution is declared as
determined in good faith by the Board of Directors) of all non-cash dividends
or other distributions other than a dividend payable in shares of Common Stock
or a subdivision of the outstanding shares of Common Stock (by reclassification
or otherwise), declared (but not withdrawn) on the common stock, $5.00 par
value, of this Corporation (the "Common Stock") during the immediately
preceding quarterly dividend period, or, with respect to the first quarterly
dividend period, since the first issuance of any share or fraction of a share
of Series D Participating Preferred Stock.  In the event the Corporation shall
at any time after May 17, 1996 (the "Rights Declaration Date") (i) declare any
dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the
outstanding Common Stock, or (iii) combine the outstanding Common Stock into a
smaller number of shares, then in each such case the amount to which holders of
shares of Series D Participating 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 Stock outstanding immediately after such event and
the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                 (B)  The Corporation shall declare a dividend or distribution
on the Series D Participating Preferred Stock as provided in Paragraph (A)
above immediately after it declares a dividend or distribution on the Common
Stock (other than a




                                      2
                                        
<PAGE>   50

dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common Stock during
the period between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $10 per share on the Series D
Participating 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 D Participating Preferred Stock from the Quarterly
Dividend Payment Date next preceding the date of issue of such shares of Series
D Participating Preferred Stock, 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 D Participating 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 D Participating
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 D Participating Preferred Stock entitled to receive payment of a
dividend or distribution declared thereon, which record date shall be no more
than 30 days prior to the date fixed for the payment thereof.

                 Section 3.  Voting Rights.  The holders of shares of Series D
Participating Preferred Stock shall have the following voting rights:

                 (A)  Subject to the provision for adjustment hereinafter set
forth, each share of Series D Participating Preferred Stock shall entitle the
holder thereof to one vote on all matters submitted to a vote of the
stockholders of the Corporation.  In the event the Corporation shall at any
time after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the number of votes per share to which holders of shares
of Series D Participating Preferred Stock were entitled immediately prior to
such event shall be adjusted by multiplying such number by a



                                      3

                                        
<PAGE>   51

fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to
such event.

                 (B)  Except as otherwise provided herein, by the Restated
Certificate of Incorporation or by law, the holders of shares of Series D
Participating Preferred Stock and the holders of shares of Common Stock shall
vote together as one class on all matters submitted to a vote of stockholders
of the Corporation.

                 (C)  (i)  If at any time dividends on any Series D
Participating Preferred Stock shall be in arrears in an amount equal to six (6)
quarterly dividends thereon, the occurrence of such contingency shall mark the
beginning of a period (herein called a "default period") which shall extend
until such time when all accrued and unpaid dividends for all previous
quarterly dividend periods and for the current quarterly dividend period on all
shares of Series D Participating Preferred Stock then outstanding shall have
been declared and paid or set apart for payment.  During each default period,
all holders of the Series D Participating Preferred Stock with dividends in
arrears in an amount equal to six (6) quarterly dividends thereon, voting as a
class, shall have the right to elect two (2) Directors.

                          (ii)  During any default period, such voting right of
the holders of Series D Participating Preferred Stock may be exercised
initially at a special meeting called pursuant to subparagraph (iii) of this
Section 3(C) or at any annual meeting of stockholders, and thereafter at annual
meetings of stockholders, provided that neither such voting right nor the right
of the holders of any other series of preferred stock, if any, to increase, in
certain cases, the authorized number of Directors shall be exercised unless the
holders of ten percent (10%) in number of shares of Series D Participating
Preferred Stock outstanding shall be present in person or by proxy.  The
absence of a quorum of the holders of Common Stock shall not affect the
exercise by the holders of Series D Participating Preferred Stock of such
voting right.  At any meeting at which the holders of Series D Participating
Preferred Stock shall exercise such voting right initially during an existing
default period, they shall have the right, voting as a class, to elect
Directors to fill such vacancies, if any, in the Board of Directors as may then
exist up to two (2) Directors or, if such right is exercised at an annual
meeting, to elect two (2) Directors.  If the number which may be so elected at
any special meeting does not amount to the required number, the holders of the
Series D Participating Preferred Stock shall have the right to make such
increase in the number of Directors as shall be necessary to permit the
election by them of the required number.  After the holders of the Series D
Participating Preferred Stock shall have exercised their right to elect
Directors in any



                                      4

                                        
<PAGE>   52

default period and during the continuance of such period, the number of
Directors shall not be increased or decreased except by vote of the holders of
Series D Participating Preferred Stock as herein provided or pursuant to the
rights of any equity securities ranking senior to or pari passu with the Series
D Participating Preferred Stock.

                          (iii)  Unless the holders of Series D Participating
Preferred Stock shall, during an existing default period, have previously
exercised their right to elect Directors, the Board of Directors may order, or
any stockholder or stockholders owning in the aggregate not less than ten
percent (10%) of the total number of shares of Series D Participating Preferred
Stock outstanding, irrespective of series, may request, the calling of special
meeting of the holders of Series D Participating Preferred Stock, which meeting
shall thereupon be called by the Chairman, the President or the Secretary of
the Corporation.  Notice of such meeting and of any annual meeting at which
holders of Series D Participating Preferred Stock are entitled to vote pursuant
to this Paragraph (C)(iii) shall be given to each holder of record of Series D
Participating Preferred Stock by mailing a copy of such notice to the holder at
the holder's last address as the same appears on the books of the Corporation.
Such meeting shall be called for a time not earlier than 20 days and not later
than 60 days after such order or request, or in default of the calling of such
meeting within 60 days after such order or request, such meeting may be called
on similar notice by any stockholder or stockholders owning in the aggregate
not less than ten percent (10%) of the total number of shares of Series D
Participating Preferred Stock outstanding.  Notwithstanding the provisions of
this Paragraph (C)(iii), no such special meeting shall be called during the
period within 60 days immediately preceding the date fixed for the next annual
meeting of the stockholders.

                          (iv)  In any default period, the holders of Common
Stock, and other classes of stock of the Corporation if applicable, shall
continue to be entitled to elect the whole number of Directors until the
holders of Series D Participating Preferred Stock shall have exercised their
right to elect two (2) Directors voting as a class, after the exercise of which
right (x) the Directors so elected by the holders of Series D Participating
Preferred Stock shall continue in office until their successors shall have been
elected by such holders or until the expiration of the default period, and (y)
any vacancy in the Board of Directors may (except as provided in Paragraph
(C)(ii) of this Section 3) be filled by vote of a majority of the remaining
Directors theretofore elected by the holders of the class of stock which
elected the Director whose office shall have become vacant.  References in this
Paragraph (C) to Directors elected by the holders of a particular class of
stock shall include Directors



                                      5

                                        
<PAGE>   53

elected by such Directors to fill vacancies as provided in clause (y) of the
foregoing sentence.

                          (v)  Immediately upon the expiration of a default
period, (x) the right of the holders of Series D Participating Preferred Stock
as a class to elect Directors shall cease, (y) the term of any Directors
elected by the holders of Series D Participating Preferred Stock as a class
shall terminate, and (z) the number of Directors shall be such number as may be
provided for in the Restated Certificate of Incorporation or by-laws
irrespective of any increase made pursuant to the provisions of paragraph
(C)(ii) of this Section 3 (such number being subject, however, to change
thereafter in any manner provided by law or in the Restated Certificate of
Incorporation or by-laws).  Any vacancies in the Board of Directors effected by
the provisions of clauses (y) and (z) in the preceding sentence may be filled
by a majority of the remaining directors.

                 (D)  Except as set forth herein, holders of Series D
Participating Preferred Stock shall have no special voting rights and their
consent shall not be required (except to the extent they are entitled to vote
with holders of Common Stock as set forth herein) for taking any corporate
action.

                 Section 4.  Certain Restrictions.

                 (A)  Whenever quarterly dividends or other dividends or
distributions payable on the Series D Participating 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 D
Participating Preferred Stock outstanding shall have been paid in full, the
Corporation shall not

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

                 (ii)  declare or pay dividends on or make any other
         distributions on, any shares of stock ranking on a parity (either as
         to dividends or upon liquidation, dissolution or winding up) with the
         Series D Participating Preferred Stock, except dividends paid ratably
         on the Series D Participating Preferred Stock and all such parity
         stock



                                      6

                                        
<PAGE>   54

         on which dividends are payable or in arrears in proportion to the
         total amounts to which the holders of all such shares are then
         entitled;

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

                 (iv)  purchase or otherwise acquire for consideration any
         shares of Series D Participating Preferred Stock, or any shares of
         stock ranking on a parity with the Series D Participating 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 4, purchase or otherwise acquire such shares at such time and in
such manner.

                 Section 5.  Reacquired Shares.  Any shares of Series D
Participating 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 to be created by resolution or
resolutions of the Board of Directors, subject to the conditions and
restrictions on issuance set forth herein.

                 Section 6.  Liquidation, Dissolution or Winding Up.

                 (A)  In the event of any voluntary or involuntary liquidation,
dissolution or winding up of the Corporation, no distribution shall be made to
the holders of



                                      7

                                        
<PAGE>   55

stock ranking junior (either as to dividends or upon liquidation, dissolution
or winding up) to the Series D Participating Preferred Stock unless, prior
thereto, the holders of shares of Series D Participating Preferred Stock shall
have received $1,000 per share, plus accrued and unpaid dividends to the date
of distribution, whether or not earned or declared to the date of such payment
(the "Series D Liquidation Preference").  Following the payment of the full
amount of the Series D Liquidation Preference, no additional distributions
shall be made to the holders of shares of Series D Participating Preferred
Stock unless, prior thereto, the holders of shares of Common Stock shall have
received an amount per share (the "Common Adjustment") equal to the quotient
obtained by dividing (i) the Series D Liquidation Preference by (ii) 1,000 (as
appropriately adjusted as set forth in subparagraph C below to reflect such
events as stock splits, stock dividends and recapitalizations with respect to
the Common Stock) (such number in clause (ii), the "Adjustment Number").
Following the payment of the full amount of the Series D Liquidation Preference
and the Common Adjustment in respect of all outstanding shares of Series D
Participating Preferred Stock and Common Stock, respectively, holders of Series
D Participating Preferred Stock and holders of shares of Common Stock shall
receive their ratable and proportionate share of the remaining assets to be
distributed in the ratio of the Adjustment Number to 1 with respect to such
Preferred Stock and Common Stock, on a per share basis, respectively.

                 (B)  In the event, however, that there are not sufficient
assets available to permit payment in full of the Series D Liquidation
Preference and the liquidation preferences of all other series of preferred
stock, if any, which rank on a parity with the Series D Participating Preferred
Stock, then such remaining assets shall be distributed ratably to the holders
of such parity shares in proportion to their respective liquidation
preferences.  In the event, however, that there are not sufficient assets
available to permit payment in full of the Common Adjustment, then such
remaining assets shall be distributed ratably to the holders of Common Stock.

                 (C)  In the event the Corporation shall at any time after the
Rights Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the amount to which holders of Series D Participating Preferred
Stock were entitled immediately prior to such event pursuant to 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 Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to
such event.



                                      8

                                        
<PAGE>   56


                 Section 7.  Consolidation, Merger, etc.  In case the
Corporation shall enter into any consolidation, merger, combination or other
transaction in which the shares of Common Stock are exchanged for or changed
into other stock or securities, cash and/or any other property, then in any
such case the shares of Series D Participating Preferred Stock shall at the
same time be similarly exchanged or changed in an amount per share (subject to
the provision for adjustment hereinafter set forth) equal to 1,000 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
Stock is changed or exchanged.  In the event the Corporation shall at any time
after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of 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 D Participating Preferred
Stock shall be adjusted by multiplying such amount by a fraction the numerator
of which is the number of shares of Common Stock outstanding immediately after
such event and the denominator of which is the number of shares of Common Stock
that were outstanding immediately prior to such event.

                 Section 8.  No Redemption.  The shares of Series D
Participating Preferred Stock shall not be redeemable.

                 Section 9.  Ranking.  The Series D Participating Preferred
Stock shall rank junior to all other series of the Corporation's Preferred
Stock as to the payment of dividends and as regards liquidation, dissolution
and winding up, unless the terms of any such series shall provide otherwise.

                 Section 10.  Amendment.  The Restated Certificate of
Incorporation of the Corporation shall not be further amended in any manner
which would materially alter or change the powers, preferences or special
rights of the Series D Participating Preferred Stock so as to affect them
adversely without the affirmative vote of the holders of a majority or more of
the outstanding shares of Series D Participating Preferred Stock, voting
separately as a class.

                 Section 11.  Fractional Shares.  Series D Participating
Preferred Stock may be issued in fractions of a share which shall entitle the
holder, in proportion to such holders fractional shares, to exercise voting
rights, receive dividends, participate in distributions and to have the benefit
of all other rights of holders of Series D Participating Preferred Stock.




                                      9
                                        
<PAGE>   57


                 IN WITNESS WHEREOF, we have executed and subscribed this
Certificate and do affirm the foregoing as true under the penalties of perjury
this 18th day of June, 1996.





                                        By: ________________________________
                                        Name:
                                        Its:
     Attest:

     _________________________
     Name:  Mark W. Yonkman
     Is:  Vice President and Assistant Secretary




                                      10
                                        
<PAGE>   58


                                                                       Exhibit B

                          [Form of Rights Certificate]

     Certificate No. R-                                          ________ Rights


     NOT EXERCISABLE AFTER JULY 1, 2006 OR EARLIER IF REDEEMED BY THE COMPANY.
THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE COMPANY, AT $0.01
PER RIGHT ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.  UNDER CERTAIN
CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON (AS SUCH TERM
IS DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS
MAY BECOME NULL AND VOID.  [THE RIGHTS REPRESENTED BY THIS RIGHTS CERTIFICATE
ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS OR BECAME AN ACQUIRING
PERSON OR AN AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE
DEFINED IN THE RIGHTS AGREEMENT).  ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE
RIGHTS REPRESENTED HEREBY MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES
SPECIFIED IN SECTION 7(e) OF SUCH AGREEMENT.]*

                               Rights Certificate

                             COMERICA INCORPORATED


                 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 June 18, 1996 (the "Rights
Agreement"), between Comerica Incorporated, a Delaware corporation (the
"Company"), and Comerica Bank, a Michigan corporation (the "Rights Agent"), to
purchase from the Company at any time prior to 5:00 P.M. (Detroit time) on July
1, 2006 at the office or offices of the Rights Agent

_________________________

*   The portion of the legend in brackets shall be inserted only if applicable
    and shall replace the preceding sentence.

                                        
<PAGE>   59

designated for such purpose, or its successors as Rights Agent, one
one-thousandth of a fully paid, non-assessable share of Series D Participating
Preferred Stock (the "Preferred Stock") of the Company, at a purchase price of
$125 in cash per one one-thousandth of a share (the "Purchase Price"), upon
presentation and surrender of this Rights Certificate with the Form of Election
to Purchase and related Certificate duly executed.  The number of Rights
evidenced by this Rights Certificate (and the number of shares which may be
purchased upon exercise thereof) set forth above, and the Purchase Price per
share set forth above, are the number and Purchase Price as of June ___, 1996,
based on the Preferred Stock as constituted at such date.  Pursuant to the
Rights Agreement, the Company reserves the right to require prior to the
occurrence of a Triggering Event (as defined below) that, upon any exercise of
Rights, a number of Rights be exercised so that only whole shares of Preferred
Stock will be issued.

                 Upon the occurrence of a Section 11(a)(ii) Event (as such term
is defined in the Rights Agreement), if the Rights evidenced by this Rights
Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate
or Associate of any such Acquiring Person (as such terms are defined in the
Rights Agreement), (ii) a transferee of any such Acquiring Person, Associate or
Affiliate, or (iii) under certain circumstances specified in the Rights
Agreement, a transferee of a person who, after such transfer, became an
Acquiring Person, or an Affiliate or Associate of an Acquiring Person, such
Rights shall become null and void and no holder hereof shall have any right
with respect to such Rights from and after the occurrence of such Section
11(a)(ii) Event.

                 As provided in the Rights Agreement, the Purchase Price and
the number and kind of shares of Preferred Stock or other securities, which may
be purchased upon the exercise of the Rights evidenced by this Rights
Certificate are subject to modification and adjustment upon the happening of
certain events, including Triggering Events.

                 This Rights 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 Rights
Certificates, which limitations of rights include the temporary suspension of
the exercisability of such Rights under the specific circumstances set forth in
the Rights Agreement.  Copies of the Rights



                                      2

                                        
<PAGE>   60

Agreement are on file at the above-mentioned office of the Rights Agent and are
also available upon written request to the Rights Agent.

                 This Rights Certificate, with or without other Rights
Certificates, upon surrender at the principal office or offices of the Rights
Agent designated for such purpose, may be exchanged for another Rights
Certificate or Rights Certificates of like tenor and date evidencing Rights
entitling the holder to purchase a like aggregate number of one one-thousandths
of a share of Preferred Stock as the Rights evidenced by the Rights Certificate
or Rights Certificates surrendered shall have entitled such holder to purchase.
If this Rights Certificate shall be exercised in part, the holder shall be
entitled to receive upon surrender hereof another Rights Certificate or Rights
Certificates for the number of whole Rights not exercised.

                 Subject to the provisions of the Rights Agreement, the Rights
evidenced by this Certificate may be redeemed by the Company at its option at a
redemption price of $0.01 per Right at any time prior to the earlier of (i) the
time that any Person becomes an Acquiring Person and (ii) the close of business
on Final Expiration Date.

                 No fractional shares of Preferred Stock will be issued upon
the exercise of any Right or Rights evidenced hereby (other than fractions
which are integral multiples of one one-thousandth of a share of Preferred
Stock, 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 Rights Certificate shall be entitled to vote
or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock or of any other securities of the Company which may at any time
be issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or, to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Rights
Certificate shall have been exercised as provided in the Rights Agreement.

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



                                      3

                                        
<PAGE>   61


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

     Dated as of ________  ___, 19__


     ATTEST:                                       COMERICA INCORPORATED


     ____________________                  By_______________________ 
       Secretary                            Title:

     Countersigned:


     COMERICA BANK


     By______________________
      Authorized Signature




                                      4
                                        
<PAGE>   62

                  [Form of Reverse Side of Rights Certificate]

                               FORM OF ASSIGNMENT

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


     FOR VALUE RECEIVED ________________________________________________
     hereby sells, assigns and transfer unto____________________________
     ___________________________________________________________________
                 (Please print name and address of transferee)

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


     Dated: ________ ________, 19__


                                                     ___________________________
                                               Signature

     Signature Guaranteed:

                                  Certificate

                 The undersigned hereby certifies by checking the appropriate
     boxes that:

                 (1)      this Rights Certificate [  ] is [  ] is not being
     sold, assigned and transferred by or on behalf of a Person who is or was
     an Acquiring Person or an Affiliate or Associate of any such Acquiring
     Person (as such terms are defined pursuant to the Rights Agreement);

                 (2)      after due inquiry and to the best knowledge of the
     undersigned, it [  ] did [  ] did not acquire the Rights evidenced by
     this Rights Certificate from any Person who is, was or subsequently became
     an Acquiring Person or an Affiliate or Associate of an Acquiring Person.

     Dated: __________________, 19__                    ______________________





                                        
<PAGE>   63

                                                                       Signature

     Signature Guaranteed:

                                     NOTICE

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





                                        
<PAGE>   64

                          FORM OF ELECTION TO PURCHASE
                      (To be executed if holder desires to
                       exercise Rights represented by the
                              Rights Certificate.)

To:  COMERICA INCORPORATED:

                 The undersigned hereby irrevocably elects to exercise
__________ Rights represented by this Rights Certificate to purchase the shares
of Preferred Stock issuable upon the exercise of the Rights (or such other
securities of the Company or of any other person which may be issuable upon the
exercise of the Rights) and requests that certificates for such shares be
issued in the name of and delivered to:

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 Rights Certificate, a new Rights Certificate for the balance of such
Rights shall be registered in the name of and delivered to:

Please insert social security
or other identifying number


______________________________________________________________________________
                        (Please print name and address)

______________________________________________________________________________

______________________________________________________________________________


Dated: __________________, 19__                       ________________________
                                                  Signature

Signature Guaranteed:





                                        
<PAGE>   65

                                  Certificate

                 The undersigned hereby certifies by checking the appropriate
boxes that:

                 (1)  the Rights evidenced by this Rights Certificate [ ] are 
[ ] are not being exercised by or on behalf of a Person who is or was an
Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as
such terms are defined pursuant to the Rights Agreement);

                 (2)  after due inquiry and to the best knowledge of the
undersigned, it [ ] did [ ] did not acquire the Rights evidenced by this Rights
Certificate from any Person who is, was or became an Acquiring Person or an
Affiliate or Associate of an Acquiring Person.

Dated: ___________, 19__                           ___________________________
                                             Signature


Signature Guaranteed:

                                     NOTICE

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





                                        
<PAGE>   66


                                                                       Exhibit C

                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED STOCK


                 On May 17, 1996, the Board of Directors (the "Board") of
Comerica Incorporated (the "Company") declared a dividend distribution of one
Right for each outstanding share of Comerica Common Stock to stockholders of
record at the close of business on the Expiration Date of the Rights Agreement
adopted by the Board on January 26, 1988 (the "Record Date"), which is expected
to occur on July 1, 1996.  Each Right entitles the registered holder to
purchase from the Company a unit consisting of one one-thousandth of a share (a
"Unit") of Series D Participating Preferred Stock, no par value (the "Preferred
Stock"), at a Purchase Price of $125 in cash per Unit, subject to adjustment.
The description and terms of the Rights are set forth in a Rights Agreement
(the "Rights Agreement") between the Company and Comerica Bank, as Rights
Agent.

                 Initially, the Rights will be attached to all Common Stock
certificates representing shares then outstanding, and no separate Rights
Certificate will be distributed.  The Rights will separate from the Common
Stock and a Distribution Date will occur upon the earlier of (i) 10 days
following a public announcement that a person or group of affiliated or
associated persons (an "Acquiring Person") has acquired, or obtained the right
to acquire, beneficial ownership of 10% or more of the outstanding shares of
Common Stock (the "Stock Acquisition Date"), or (ii) 10 business days (or such
later date as the Board of Directors shall determine) following the
commencement of a tender offer or exchange offer that would result in a person
or group beneficially owning 10% or more of such outstanding shares of Common
Stock.  Until the Distribution Date, (i) the Rights will be evidenced by the
Common Stock certificates and will be transferred with and only with such
Common Stock certificates, (ii) new Common Stock certificates issued after the
Record Date will contain a notation incorporating the Rights Agreement by
reference and (iii) the surrender for transfer of any certificates for Common
Stock outstanding will also constitute the transfer of the Rights associated
with the Common Stock represented by such certificate.

                 The Rights are not exercisable until the Distribution Date and
will expire at the close of business on July 1, 2006, unless earlier redeemed
by the Company as described below.  Pursuant to the Rights Agreement, the
Company reserves the right to require prior to the occurrence of a Triggering
Event (as defined below) that, upon any exercise of Rights, a number of Rights
be exercised so that only whole shares of Preferred Stock will be issued.





                                        
<PAGE>   67


                 As soon as practicable after the Distribution Date, Rights
Certificates will be mailed to holders of record of the Common Stock as of the
close of business on the Distribution Date and, thereafter, the separate Rights
Certificates alone will represent the Rights.  Except as otherwise determined
by the Board of Directors and except in connection with shares of Common Stock
issued upon the exercise of employee stock options or the conversion of
convertible securities, only shares of Common Stock issued prior to the
Distribution Date will be issued with Rights.

                 In the event that, at any time following the Distribution
Date, any Person (subject to certain exceptions) becomes an Acquiring Person
except pursuant to an offer for all outstanding shares of Common Stock which
the independent directors determine to be fair to, and otherwise in the best
interests of, stockholders, each holder of a Right will thereafter have the
right to receive, upon exercise, Common Stock (or, in certain circumstances,
cash, property or other securities of the Company) having a value equal to two
times the exercise price of the Right.  Notwithstanding any of the foregoing,
following the occurrence of any event set forth in this paragraph, all Rights
that are, or (under certain circumstances specified in the Rights Agreement)
were, beneficially owned by any Acquiring Person will be null and void.

                 For example, at an exercise price of $125 per Right, each
Right not owned by an Acquiring Person (or by certain related parties)
following an event set forth in the preceding paragraph would entitle its
holder to purchase $250 worth of Common Stock (or other consideration, as noted
above) for $125.  Assuming that the Common Stock had a per share value of $50
at such time, the holder of each valid Right would be entitled to purchase 5
shares of Common Stock for $250.

                 In the event that, at any time following the Stock Acquisition
Date, (i) the Company is acquired in a merger or other business combination
transaction in which the Company is not the surviving corporation or its Common
Stock is changed or exchanged (other than a merger which follows an offer
described in the second preceding paragraph), or (ii) 50% or more of the
Company's assets or earning power is sold or transferred, each holder of a
Right (except Rights which previously have been voided as set forth above)
shall thereafter have the right to receive, upon exercise, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right.  The events set forth in this paragraph and in the second preceding
paragraph are referred to as the "Triggering Events."

                 The Purchase Price payable, and the number of Units of
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
reclassification of, the Preferred Stock, (ii) if holders of the Preferred
Stock are granted certain rights or warrants to subscribe for Preferred Stock
or convertible securities at less than the current market price of the
Preferred





                                        
<PAGE>   68

Stock, or (iii) upon the distribution to holders of the Preferred Stock of
evidences of indebtedness or assets (excluding regular quarterly cash
dividends) or of subscription rights or warrants (other than those referred to
above).

                 With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments amount to at least 1% of the
Purchase Price.  No fractional Units will be issued and, in lieu thereof, an
adjustment in cash will be made based on the market price of the Preferred
Stock on the last trading date prior to the date of exercise.

                 At any time until the time a Person becomes an Acquiring
Person, the Company may redeem the Rights in whole, but not in part, at a price
of $.01 per Right (payable in cash, stock or other consideration deemed
appropriate by the Board).  Immediately upon the action of the Board of
Directors ordering redemption of the Rights, the Rights will terminate and the
only right of the holders of Rights will be to receive the $.01 redemption
price.

                 Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.  While the distribution of the
Rights will not be taxable to stockholders or to the Company, stockholders may,
depending upon the circumstances, recognize taxable income in the event that
the Rights become exercisable for Common Stock (or other consideration) of the
Company or for common stock of the acquiring company as set forth above.

                 Any of the provisions of the Rights Agreement may be amended
by the Board of Directors of the Company prior to the Distribution Date.  After
the Distribution Date, the provisions of the Rights Agreement may be amended by
the Board in order to cure any ambiguity, to make changes which do not
adversely affect the interests of holders of Rights (excluding the interests of
any Acquiring Person), or to shorten or lengthen any time period under the
Rights Agreement; provided, however, that no amendment to adjust the time
period governing redemption shall be made at such time as the Rights are not
redeemable.

                 A copy of the Rights Agreement is being filed with the
Securities and Exchange Commission as an Exhibit to a Registration Statement on
Form 8-A.  A copy of the Rights Agreement is available free of charge from the
Company.  This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is incorporated herein by reference.







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