WAI INC
8-A12B, 1997-11-28
NATURAL GAS TRANSMISISON & DISTRIBUTION
Previous: WAI INC, 8-K, 1997-11-28
Next: ONEOK INC /NEW/, S-8, 1997-11-28



<PAGE>

                       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


                                  ONEOK, INC.
                                  -----------
             (Exact name of registrant as specified in its charter)
                                        

              OKLAHOMA                                  783-1520922
- ----------------------------------------                -----------
(State of incorporation or organization)    (I.R.S. Employer Identification No.)


100 WEST FIFTH STREET                                   74103-0871
TULSA, OKLAHOMA                                         ----------
- ----------------------------------------                 (Zip Code)
(Address of principle executive offices)

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

                                              Name of each exchange on which
Title of each class to be so registered          class is to be registered
- ---------------------------------------       ------------------------------
SERIES C PARTICIPATING PREFERRED STOCK,           New York Stock Exchange
PAR VALUE $0.01 PER SHARE
                                        
  If this Form relates to the registration of a class of securities pursuant to
Section 12(b) of the Exchange Act and is effective pursuant to General
Instruction A.(c), check the following box.  [X]

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

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

                                      None
<PAGE>
 
ITEM 1.  DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED

          ONEOK Inc., a Delaware corporation ("ONEOK"), Western Resources, Inc.,
                                               -----                            
a Kansas corporation ("WRI") and WAI, Inc. ("WAI"), a newly formed Oklahoma
                       ---                   ---                           
corporation and a wholly-owned subsidiary of WRI, entered into an Agreement,
dated as of December 12, 1996, as amended and restated as of May 19, 1997,
pursuant to which: (A) immediately prior to the effective time of the Merger (as
defined below) (the "Merger Effective Time"), WRI contributed, or caused
to be contributed, certain assets and all of the outstanding capital stock of
WRI's direct and indirect wholly-owned subsidiaries, Westar Gas Marketing, Inc.
and Mid Continent Market Center, Inc. to WAI, where upon WAI assumed certain
liabilities and debt of WRI and (B) ONEOK was merged (the "Merger") with and
                                                           ------           
into WAI, with WAI as the surviving corporation and whereupon WAI's name was
changed to "ONEOK, Inc." (WAI being referred to herein, after the Merger
Effective Time, as "New ONEOK").  On November 26, 1997, the Merger was
                    ---------                                         
consummated.  In addition, immediately prior to the Merger Effective Time on
November 26, 1997, WRI and WAI entered into a Shareholder Agreement (the
"Shareholder Agreement") pursuant to which, among other things, there were
established certain terms and conditions concerning the acquisition and
disposition of securities of WAI by WRI, and related provisions concerning the
WRI's relationship with and investment in New ONEOK.  All capitalized terms not
defined herein have the meanings ascribed to such term in the Rights Agreement
(as defined herein).

          On November 26, 1997, the Board of Directors of New ONEOK, declared a
dividend distribution of one preferred share purchase right (a "Right") for each
                                                                -----           
outstanding share of Common Stock, par value $0.01 per share (the "Common
                                                                   ------
Shares"), of New ONEOK.  The dividend is payable to the stockholders of record
as of 5:00 P.M., Eastern Standard Time, on November 26, 1997 (the "Record
                                                                   ------
Date"), and with respect to Common Shares issued thereafter until the
Distribution Date (as defined below) and, in certain circumstances, with respect
to Common Shares issued after the Distribution Date.  Except as set forth below,
each Right, when it becomes exercisable, entitles the registered holder to
purchase from New ONEOK one one-hundredth of a share of Series C Participating
Preferred Stock, par value $0.01 per share (the "Preferred Shares") at a price
                                                 ----------------             
of $80.00 per one one-hundredth of a Preferred Share (the "Purchase Price"),
                                                           --------------   
subject to adjustment.  The description and terms of the Rights are set forth in
a Rights Agreement, dated as of November 26, 1997 (the "Rights Agreement"),
                                                        ----------------   
between New ONEOK and Liberty Bank and Trust Company of Oklahoma City, N.A. (the
"Rights Agent").
 ------------   

          Initially, the Rights will be attached to all certificates
representing Common Shares then outstanding, and no separate Right Certificates
(as hereinafter defined) will be distributed.  The Rights will separate from the
Common Shares on the earliest to occur of (i) the first date of public
announcement that a person or "group" has acquired beneficial ownership of 15%
or more of the outstanding Common Shares (except

                                      -2-
<PAGE>
 
pursuant to a Permitted Offer, as hereinafter defined); or (ii) 10 business days
(or such later date as the Board may determine) following the commencement of,
or announcement of an intention to commence, a tender offer or exchange offer
the consummation of which would result in a person or group becoming an
Acquiring Person (as hereinafter defined) (the earliest of such dates being
called the "Distribution Date").  A person or group whose acquisition of Common
            -----------------                                                  
Shares causes a Distribution Date pursuant to clause (i) above is an "Acquiring
                                                                      ---------
Person."  The first date of public announcement that a person or group has
- ------                                                                    
become an Acquiring Person is the "Shares Acquisition Date."  "Disinterested
                                   -----------------------     -------------
Directors" are directors who are not officers of New ONEOK and who are not
- ---------                                                                 
Acquiring Persons or their affiliates, associates or representatives of any of
them, or any Person who directly or indirectly proposed or nominated as a
director of New ONEOK by a Transaction Person. "Transaction Person" with respect
                                                ------------------              
to a Transaction means (x) any Person who (i) is or will become an Acquiring
Person if the Transaction were to be consummated and (ii) directly or indirectly
proposed or nominated a director of New ONEOK which director is in office at the
time of consideration of the Transaction or (y) an Affiliate or Associate of
such a Person. A "Permitted Offer" is a tender or exchange offer for all
                  ---------------                                       
outstanding Common Shares which is at a price and on terms determined, prior to
the purchase of shares under such tender or exchange offer, by a Majority of
Disinterested Directors to be adequate (taking into account all factors that
such Disinterested Directors deem relevant) and otherwise in the best interests
of New ONEOK, its stockholders and its other relevant constituencies (other than
the person or any affiliate or associate thereof on whose basis the offer is
being made) taking into account all factors that such directors may deem
relevant and (ii) any tender or exchange offer required or permitted to be made
by the Shareholder Group (as defined in the Shareholder Agreement) pursuant to,
and in accordance with, the Shareholder Agreement.

          Notwithstanding the foregoing, an Acquiring Person does not include
(i) any member of the Shareholder Group, but only to the extent of Common Shares
held or acquired by such Shareholder Group member in accordance with the terms
of the Shareholder Agreement, and provided that the exemption provided under
this clause (i) shall permanently expire at such time as the Total Ownership
Percentage of WRI and its affiliates first falls below 10% or (ii) any
Transferee who acquires Beneficial Ownership of Common Shares from the
Shareholder Group pursuant to Sections 3.4(a) or 3.4(b) of the Shareholder
Agreement or who acquires Beneficial Ownership of less than 5% of the Common
Shares in a public offering pursuant to Section 3.4(c) of the Shareholder
Agreement, but only to the extent of Common Shares acquired in accordance with
the terms of the Shareholder Agreement (it being understood that, any such
Transferee shall become an Acquiring Person upon the concurrent or subsequent
acquisition by such Transferee, or its Affiliates or Associates, of any
additional Common Shares if, after giving effect to such acquisition, and taking
into account all shares Beneficially Owned 

                                      -3-
<PAGE>
 
by the Transferee including the shares acquired from the Shareholder Group, such
Transferee would be an Acquiring Person but for the provisions of this clause
(ii)). "Shareholder Group" means WRI, any Affiliate of WRI and any Person with
       -----------------                                                     
whom WRI or any Affiliate of WRI is part of a 13D Group.  (Defined terms used in
clauses (i) and (ii) above which are defined in the Shareholder Agreement and
not otherwise defined herein shall have the same respective meanings as such
terms have in the Shareholder Agreement).

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

          The Rights are not exercisable until the Distribution Date and will
expire at 5:00 P.M., New York City time, on November 26, 2007, unless earlier
redeemed by New ONEOK as described below.

          In the event that any person becomes an Acquiring Person (except
pursuant to a Permitted Offer as defined above), each holder of a Right will
have (subject to the terms of the Rights Agreement) the right (the "Flip-In
                                                                    -------
Right") to receive upon exercise the number of Common Shares, or, in the
- -----                                                                   
discretion of the Board of Directors, of one one-hundredth of a Preferred Share
(or, in certain circumstances, other securities of New ONEOK) having a value
(immediately prior to such triggering event) equal to two times the exercise
price of the Right.  Notwithstanding the foregoing, following the occurrence of
the event described above, all Rights that are, or (under certain circumstances
specified in the Rights Agreement) were, beneficially owned by any Acquiring
Person or any affiliate or associate thereof will be null and void.

          In the event that, at any time following the Shares Acquisition Date,
(i) New ONEOK is acquired in a merger or other business combination transaction
in which the holders of all of the outstanding Common Shares immediately prior
to the consummation of the transaction are not the holders of all of the
surviving corporation's 

                                      -4-
<PAGE>
 
voting power, or (ii) more than 50% of New ONEOK's assets or earning power is
sold or transferred, in either case with or to an Acquiring Person or any
affiliate or associate or any other person in which such Acquiring Person,
affiliate or associate has an interest or any person acting on behalf of or in
concert with such Acquiring Person, affiliate or associate, or, if in such
transaction all holders of Common Shares are not treated alike, any other
person, then each holder of a Right (except Rights which are voided as set forth
above) shall thereafter have the right (the "Flip-Over Right") to receive, upon
                                            -----------------
exercise, common shares of the acquiring company having a value
equal to two times the exercise price of the Right.

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

          The Purchase Price is also subject to adjustment in the event of a
stock split of the Common Shares or a stock dividend on the Common Shares
payable in Common Shares or subdivisions, consolidations or combinations of the
Common Shares occurring, in any such case, prior to the Distribution Date.

          With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractional one-hundredths of a Preferred Share will be
issued and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day price to the date
of exercise.

          Preferred Shares purchasable upon exercise of the Rights will not be
redeemable.  Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $1.00 per share but, if greater, will be entitled
to an aggregate dividend per share of 100 times the dividend declared per Common
Share.  In the event of liquidation, the holders of the Preferred Shares will be
entitled to a minimum preferential liquidation payment of $1.00 per share;
thereafter, and after the holders of the Common Shares receive a liquidation
payment of $0.01 per share, the holders of the Preferred Shares and the holders
of the Common Shares will share the remaining assets in the ratio of one hundred
to 1 (as adjusted) for each Preferred Share and Common Share so held,
respectively.  Finally, in the event of any merger, consolidation or other
transaction in 

                                      -5-
<PAGE>
 
which Common Shares are exchanged, each Preferred Share will be entitled to
receive one hundred times the amount received per Common Share. These rights are
protected by customary antidilution provisions. In the event that the amount of
accrued and unpaid dividends on the Preferred Shares is equivalent to at least
six full quarterly dividends, the holders of the Preferred Shares shall have the
right, voting as a class, to elect two directors in addition to the directors
elected by the holders of the Common Shares until all cumulative dividends on
the Preferred Shares have been paid through the last quarterly dividend payment
date or until non-cumulative dividends have been paid regularly for at least one
year.

          At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, New ONEOK may redeem the
rights in whole, but not in part, at a price of $0.01 per Right (the "Redemption
                                                                      ----------
Price"), which redemption shall be effective upon the action of the Board of
- -----                                                                       
Directors.  Additionally, New ONEOK may redeem the then outstanding Rights in
whole but not in part, at the Redemption Price after the triggering of the Flip-
in Right and before the expiration of any period during which the Flip-in Right
may be exercised in connection with a merger or other business combination
transaction or series of transactions involving New ONEOK in which all holders
of Common Shares are treated alike but not involving a Transaction Person.  Upon
the effective date of the redemption of the Rights, the right to exercise the
Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

          Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of New ONEOK, including, without limitation, the right
to vote or to receive dividends.  While the distribution of the Rights will not
be taxable to stockholders of New ONEOK, stockholders may, depending upon the
circumstances, recognize taxable income should the Rights become exercisable or
upon the occurrence of certain events thereafter.

ITEM 2.  EXHIBITS.

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

   1         Rights Agreement, dated as of November 26, 1997 between ONEOK, Inc.
             and Liberty Bank and Trust Company of Oklahoma City, N.A., as
             Rights Agent.


                                      -6-
<PAGE>
 
                                   SIGNATURE

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

                         ONEOK, INC.

                         By: /s/ Jerry D. Neal
                            --------------------------------------
                                 Vice President

Date:  November 26, 1997

                                      -7-
<PAGE>
 
                                 EXHIBIT INDEX

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

   1           Rights Agreement, dated as of November 26, 1997 between ONEOK,
               Inc. and Liberty Bank and Trust Company of Oklahoma City, N.A.,
               as Rights Agent.

                                      -8-

<PAGE>
 
                                                                      APPENDIX D
 
 
                                  ONEOK, INC.
                                      AND
                       LIBERTY BANK AND TRUST COMPANY OF
                            OKLAHOMA CITY, N.A., AS
                                  RIGHTS AGENT
                            FORM OF RIGHTS AGREEMENT
                         DATED AS OF NOVEMBER 26, 1997
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
 <C>         <S>                                                            <C>
 Section  1. Certain Definitions..........................................    1
 Section  2. Appointment of Rights Agent..................................    4
 Section  3. Issue of Right Certificates..................................    4
 Section  4. Form of Right Certificate....................................    5
 Section  5. Countersignature and Registration............................    5
 Section  6. Transfer, Split-Up, Combination and Exchange of Right
              Certificates; Mutilated, Destroyed, Lost or Stolen Right
              Certificate.................................................    6
 Section  7. Exercise of Rights; Purchase Price; Expiration Date of
              Rights......................................................    6
 Section  8. Cancellation and Destruction of Right Certificates...........    8
 Section  9. Reservation and Availability of Capital Stock................    8
 Section 10. Preferred Shares Record Date.................................    9
             Adjustment of Purchase Price, Number and Kind of Shares or
 Section 11.  Number of Rights............................................    9
 Section 12. Certificate of Adjusted Purchase Price or Number of Shares...   14
             Consolidation, Merger or Sale or Transfer of Assets or
 Section 13.  Earning Power...............................................   14
 Section 14. Fractional Rights and Fractional Shares......................   16
 Section 15. Rights of Action.............................................   17
 Section 16. Agreement of Right Holders...................................   17
 Section 17. Right Certificate Holder Not Deemed a Stockholder............   18
 Section 18. Concerning the Rights Agent..................................   18
 Section 19. Merger or Consolidation or Change of Name of Rights Agent....   18
 Section 20. Duties of Rights Agent.......................................   19
 Section 21. Change of Rights Agent.......................................   20
 Section 22. Issuance of New Right Certificates...........................   21
 Section 23. Redemption and Termination...................................   21
 Section 24. Exchange.....................................................   22
 Section 25. Notice of Certain Events.....................................   23
 Section 26. Notices......................................................   23
 Section 27. Supplements and Amendments...................................   24
 Section 28. Determination and Actions by the Board of Directors, etc.....   24
 Section 29. Successors...................................................   24
 Section 30. Benefits of this Agreement...................................   24
 Section 31. Severability.................................................   24
 Section 32. Governing Law................................................   25
 Section 33. Counterparts.................................................   25
 Section 34. Descriptive Headings.........................................   25
 Signatures  .............................................................   26
 Exhibit A   --Certificate of Designation, Preferences and Rights of
              Series C Participating Preferred Stock of ONEOK, Inc.
 Exhibit B   --Form of Right Certificate
 Exhibit C   --Summary of Rights to Purchase Preferred Shares
</TABLE>
 
                                      D-i
<PAGE>
 
                       DEFINED TERM CROSS REFERENCE SHEET
 
<TABLE>
<S>                                                           <C>
Acquiring Person............................................. Section 1(a)
Act.......................................................... Section 1(b)
Adjusted Number of Shares.................................... Section 11(a)(iii)
Adjusted Purchase Price...................................... Section 11(a)(iii)
Adjustment Shares............................................ Section 11(a)(ii)
Affiliate.................................................... Section 1(c)
Agreement.................................................... Preface
Associate.................................................... Section 1(c)
beneficially own............................................. Section 1(d)
Beneficial Owner............................................. Section 1(d)
Business Day................................................. Section 1(e)
capital stock equivalent..................................... Section 11(a)(iii)
Close of Business............................................ Section 1(f)
Common Shares................................................ Section 1(g)
Corporation.................................................. Preface
current per share market price............................... Section 11(d)(i)
Disinterested Directors...................................... Section 1(h)
Distribution Date............................................ Section 1(i)
equivalent preferred shares.................................. Section 11(b)
Exchange Act................................................. Section 1(c)
Exchange Ratio............................................... Section 24(a)
Final Expiration Date........................................ Section 1(j)
Interested Stockholder....................................... Section 1(k)
NASDAQ....................................................... Section 11(d)(i)
Permitted Offer.............................................. Section 1(l)
Person....................................................... Section 1(m)
Preferred Shares............................................. Section 1(n)
Principal Party.............................................. Section 13(b)
Proration Factor............................................. Section 11(a)(iii)
Purchase Price............................................... Section 4(a)
Record Date.................................................. Preface
Redemption Date.............................................. Section 1(o)
Redemption Price............................................. Section 23(a)(i)
Right........................................................ Preface
Right Certificate............................................ Section 3(a)
Rights Agent................................................. Preface
Section 11(a)(ii) Event...................................... Section 1(p)
Section 13 Event............................................. Section 1(q)
Security..................................................... Section 11(d)(i)
Shareholder Agreement........................................ Section 1(r)
Shares Acquisition Date...................................... Section 1(s)
Subsidiary................................................... Section 1(t)
Summary of Rights............................................ Section 3(b)
then outstanding............................................. Section 1(d)
Trading Day.................................................. Section 11(d)(i)
Transaction.................................................. Section 1(u)
Transaction Person........................................... Section 1(v)
Triggering Event............................................. Section 1(w)
voting securities............................................ Section 13(a)
</TABLE>
 
                                      D-ii
<PAGE>
 
                               RIGHTS AGREEMENT
 
  RIGHTS AGREEMENT, dated as of November 26, 1997 (the "Agreement"), between
ONEOK, Inc., an Oklahoma corporation (the "Corporation"), and LIBERTY BANK AND
TRUST COMPANY OF OKLAHOMA CITY, N.A. (the "Rights Agent").
 
  The Board of Directors of the Corporation has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common
Share (as hereinafter defined) of the Corporation outstanding at 5:00 P.M.,
Eastern Standard Time, on November 26, 1997 (the "Record Date"), each Right
representing the right to purchase one one-hundredth (subject to adjustment as
provided herein) of a Preferred Share (as hereinafter defined), upon the terms
and subject to the conditions herein set forth, and has further authorized and
directed the issuance of one Right with respect to each Common Share that
shall become outstanding between the Record Date and the earliest of the
Distribution Date, the Redemption Date or the Final Expiration Date (as such
terms are hereinafter defined); provided, however, that Rights may be issued
with respect to Common Shares that shall become outstanding after the
Distribution Date and prior to the earlier of the Redemption Date and the
Final Expiration Date in accordance with the provisions of Section 22 of this
Agreement.
 
  Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:
 
  Section 1. Certain Definitions. For purposes of this Agreement, the
following terms have the meanings indicated:
 
  (a) "Acquiring Person" shall mean any Person who or which, together with all
Affiliates and Associates of such Person, shall be the Beneficial Owner of 15%
or more of the then outstanding Common Shares (other than as a result of a
Permitted Offer) or was such a Beneficial Owner at any time after the date
hereof, whether or not such person continues to be the Beneficial Owner of 15%
or more of the then outstanding Common Shares. Notwithstanding the foregoing,
(A) the term "Acquiring Person" shall not include (i) the Corporation, (ii)
any Subsidiary of the Corporation, (iii) any employee benefit plan of the
Corporation or of any Subsidiary of the Corporation, (iv) any Person or entity
organized, appointed or established by the Corporation for or pursuant to the
terms of any such plan acting in such capacity, (v) any member of the
Shareholder Group, but only to the extent of Common Shares held or acquired by
such Shareholder Group member in accordance with the terms of the Shareholder
Agreement (as hereinafter defined), and provided that the exemption provided
under this clause (v) shall permanently expire at such time as the Total
Ownership Percentage of WRI and its affiliates first falls below 10% or (vi)
any Transferee who acquires Beneficial Ownership of Common Shares from the
Shareholder Group pursuant to Sections 3.4(a) or 3.4(b) of the Shareholder
Agreement or who acquires Beneficial Ownership of less than 5% of the Common
Shares in a public offering pursuant to Section 3.4(c) of the Shareholder
Agreement, but only to the extent of Common Shares acquired in accordance with
the terms of the Shareholder Agreement (it being understood that, any such
Transferee shall become an Acquiring Person upon the concurrent or subsequent
acquisition by such Transferee, or its Affiliates or Associates, of any
additional Common Shares if, after giving effect to such acquisition, and
taking into account all shares Beneficially Owned by the Transferee including
the shares acquired from the Shareholder Group, such Transferee would be an
Acquiring Person but for the provisions of this clause (vi)) (Defined terms
used in clauses (v) and (vi) above which are defined in the Shareholder
Agreement shall have the same respective meanings as such terms have in the
Shareholder Agreement), and (B) no Person shall become an "Acquiring Person"
(i) as a result of the acquisition of Common Shares by the Corporation which,
by reducing the number of Common Shares outstanding, increases the
proportional number of shares beneficially owned by such Person together with
all Affiliates and Associates of such Person, provided, that if (1) a Person
would become an Acquiring Person (but for the operation of this subclause (i))
as a result of the acquisition of Common Shares by the Corporation, and (2)
after such share acquisition by the Corporation, such Person, or an Affiliate
or Associate of such Person, becomes the Beneficial Owner of any additional
Common Shares, then such Person shall be deemed an Acquiring Person; or (ii)
if (1) within five Business Days after such Person would otherwise have become
or, if such Person did so inadvertently, after such Person discovers that such
Person would otherwise have become, an Acquiring Person
 
                                      D-1
<PAGE>
 
(but for the operation of this subclause (ii)), such Person notifies the Board
of Directors that such Person did so inadvertently, and (2) within two
Business Days after such notification, such Person divests itself of a
sufficient number of Common Shares so that such Person is the Beneficial Owner
of such number of Common Shares that such Person no longer would be an
Acquiring Person.
 
  (b) "Act" shall mean the Securities Act of 1933, as amended and as in effect
on the date of this Agreement.
 
  (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 as 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
  beneficially owns, directly or indirectly;
 
    (ii) which such Person or any of such Person's Affiliates or Associates
  has (A) the right to acquire (whether such right is exercisable immediately
  or only after the passage of time) pursuant to any agreement, arrangement
  or understanding, or upon the exercise of conversion rights, exchange
  rights, rights (other than the Rights), warrants or options, or otherwise;
  provided, however, that a Person shall not be deemed the Beneficial Owner
  of, or to beneficially own, securities tendered pursuant to a tender or
  exchange offer made by or on behalf of such Person or any of such Person's
  Affiliates or Associates until such tendered securities are accepted for
  purchase or exchange; or (B) the right to vote pursuant to any agreement,
  arrangement or understanding; provided, however, that a Person shall not be
  deemed the Beneficial Owner of, or to beneficially own, any security if the
  agreement, arrangement or understanding to vote such security (1) arises
  solely from a revocable proxy or consent given to such Person in response
  to a public proxy or consent solicitation made pursuant to, and in
  accordance with, the applicable rules and regulations promulgated under the
  Exchange Act and (2) is not also then reportable on Schedule 13D under the
  Exchange Act (or any comparable or successor report); or
 
    (iii) which are beneficially owned, directly or indirectly, by any other
  Person (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 (other than customary agreements with and
  between underwriters and selling group members with respect to a bona fide
  public offering of securities) relating to the acquisition, holding, voting
  (except to the extent contemplated by the proviso to Section l(d)(ii)(B))
  or disposing of any securities of the Corporation.
 
    Notwithstanding anything in this definition of Beneficial Ownership to
  the contrary, the phrase "then outstanding," when used with reference to a
  Person's Beneficial Ownership of securities of the Corporation, shall mean
  the number of such securities then issued and outstanding together with the
  number of such securities not then actually issued and outstanding which
  such Person would be deemed to own beneficially hereunder.
 
  (e) "Business Day" shall mean any day other than a Saturday, Sunday or
federal holiday.
 
  (f) "Close of Business" on any given date shall mean 5:00 P.M., New York
City time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 P.M., New York City time, on the next
succeeding Business Day.
 
  (g) "Common Shares" when used with reference to the Corporation shall mean
the shares of Common Stock, par value $0.01 per share, of the Corporation or,
in the event of a subdivision, combination or consolidation with respect to
such shares of Common Stock, the shares of Common Stock resulting from such
subdivision, combination or consolidation. "Common Shares" when used with
reference to any Person other than the Corporation shall mean the capital
stock (or equity interest) with the greatest combined economic and
 
                                      D-2
<PAGE>
 
voting power of such other Person or, if such other Person is a Subsidiary of
another Person, the Person or Persons which ultimately control such first-
mentioned Person.
 
  (h) "Disinterested Directors" shall mean the members of the Board of
Directors who are not (i) officers of the Corporation, (ii) Acquiring Persons
or their Affiliates or Associates or representatives of any of them, or (iii)
any Person who was directly or indirectly proposed or nominated as a director
of the Corporation by a Transaction Person.
 
  (i) "Distribution Date" shall have the meaning set forth in Section 3
hereof.
 
  (j) "Final Expiration Date" shall have the meaning set forth in Section 7
hereof.
 
  (k) "Interested Stockholder" shall mean any Acquiring Person or any
Affiliate or Associate of an Acquiring Person or any other Person in which any
such Acquiring Person, Affiliate or Associate has an interest which represents
in excess of 5% of the total combined economic or voting power of such person,
or any other Person acting directly or indirectly on behalf of or in concert
with any such Acquiring Person, Affiliate or Associate.
 
  (l) "Permitted Offer" shall mean (i) a tender or exchange offer for all
outstanding Common Shares which is at a price and on terms determined, prior
to the purchase of shares under such tender or exchange offer, by at least a
majority of the Disinterested Directors, to be adequate and otherwise in the
best interests of the Corporation, its stockholders and its other relevant
constituencies (other than the Person or any Affiliate or Associate thereof on
whose behalf the offer is being made) taking into account all factors that
such Disinterested Directors may deem relevant and (ii) any tender or exchange
offer required or permitted to be made by the Shareholder Group (as defined in
the Shareholder Agreement) pursuant to, and in accordance with, the
Shareholder Agreement.
 
  (m) "Person" shall mean any individual, firm, partnership, corporation,
limited liability company, trust, association, joint venture or other entity,
and shall include any successor (by merger or otherwise) of such entity.
 
  (n) "Preferred Shares" shall mean shares of Series C Participating Preferred
Stock, par value $0.01 per share, of the Corporation having the relative
rights, preferences and limitations set forth in the Form of Certificate of
Designation, Preferences and Rights attached to this Agreement as Exhibit A.
 
  (o) "Redemption Date" shall have the meaning set forth in Section 7 hereof.
 
  (p) "Section 11(a)(ii) Event" shall mean any event described in Section
11(a)(ii) hereof.
 
  (q) "Section 13 Event" shall mean any event described in clause (x), (y) or
(z) of Section 13(a) hereof.
 
  (r) "Shareholder Agreement" shall mean the Shareholder Agreement between
WAI, Inc., an Oklahoma corporation and Western Resources, Inc. a Kansas
corporation, to be entered immediately prior to the closing of the
transactions contemplated in the Agreement among WAI, Inc., Western Resources
Inc. and ONEOK Inc., dated as of December 12, 1996, as amended and restated,
dated as of May 19, 1997.
 
  (s) "Shares 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 the Exchange Act) by the Corporation or
an Acquiring Person that an Acquiring Person has become such.
 
  (t) "Subsidiary" of any Person shall mean any corporation or other Person of
which a majority of the voting power of the voting equity securities or equity
interest is owned, directly or indirectly, by such Person.
 
  (u) "Transaction" shall mean any merger, consolidation or sale of assets
described in Section 13(a) hereof or any acquisition of Common Shares of the
Corporation which would result in a Person becoming a Transaction Person.
 
                                      D-3
<PAGE>
 
  (v) "Transaction Person" with respect to a Transaction shall mean (x) any
Person who (i) is or will become an Acquiring Person if the Transaction were
to be consummated and (ii) directly or indirectly proposed or nominated a
director of the Corporation which director is in office at the time of
consideration of the Transaction, or (y) an Affiliate or Associate of such a
Person.
 
  (w) "Triggering Event" shall mean any Section 11(a)(ii) Event or any Section
13 Event.
 
  Section 2. Appointment of Rights Agent. The Corporation hereby appoints the
Rights Agent to act as agent for the Corporation and the holders of the Rights
(who, in accordance with Section 3 hereof, shall prior to the Distribution
Date also be the holders of Common Shares) in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Corporation may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable.
 
  Section 3. Issue of Right Certificates. (a) Until the earlier to occur of
(i) the Shares Acquisition Date or (ii) the Close of Business on the tenth
Business Day (or such later date as may be determined by action of the
Corporation's Board of Directors) after the date of the commencement by any
Person (other than the Corporation, any Subsidiary of the Corporation, any
employee benefit plan of the Corporation or of any Subsidiary of the
Corporation or any Person or entity organized, appointed or established by the
Corporation for or pursuant to the terms of any such plan) of, or of the first
public announcement of the intention of any Person (other than the
Corporation, any Subsidiary of the Corporation, any employee benefit plan of
the Corporation or of any Subsidiary of the Corporation or any Person or
entity organized, appointed or established by the Corporation for or pursuant
to the terms of any such plan) to commence (which intention to commence
remains in effect for five Business Days after such announcement), a tender or
exchange offer the consummation of which would result in any Person becoming
an Acquiring Person (including, in the case of both (i) and (ii), any such
date which is after the date of this Agreement and prior to the issuance of
the Rights), the earlier of such dates being herein referred to as the
"Distribution Date," (x) the Rights will be evidenced (subject to the
provisions of Section 3(b) hereof) by the certificates for Common Shares
registered in the names of the holders thereof (which certificates shall also
be deemed to be Right Certificates) and not by separate Right Certificates,
and (y) the right to receive Right Certificates will be transferable only in
connection with the transfer of the underlying Common Shares (including a
transfer to the Corporation); provided, however, that if the tender offer is
terminated prior to the occurrence of a Distribution Date, then no
Distribution Date shall occur as a result of such tender offer. As soon as
practicable after the Distribution Date, the Corporation will prepare and
execute, the Rights Agent will countersign, and the Corporation will send or
cause to be sent by first-class, postage-prepaid mail, to each record holder
of Common Shares as of the close of business on the Distribution Date, at the
address of such holder shown on the records of the Corporation, a Right
Certificate, substantially in the form of Exhibit B hereto (a "Right
Certificate"), evidencing one Right for each Common Share so held. As of and
after the Distribution Date, the Rights will be evidenced solely by such Right
Certificates.
 
  (b) As promptly as practicable following the Record Date, the Corporation
will send a copy of a Summary of Rights to Purchase Preferred Shares, in
substantially the form of Exhibit C hereto (the "Summary of Rights"), by
first-class, postage-prepaid mail, to each record holder of Common Shares as
of the close of business on the Record Date, at the address of such holder
shown on the records of the Corporation. With respect to certificates for
Common Shares outstanding as of the Record Date, until the Distribution Date,
the Rights will be evidenced by such certificates registered in the names of
the holders thereof together with a copy of the Summary of Rights attached
thereto. Until the Distribution Date (or the earlier of the Redemption Date or
the Final Expiration Date), the surrender for transfer of any certificate for
Common Shares outstanding on the Record Date, with or without a copy of the
Summary of Rights attached thereto, shall also constitute the transfer of the
Rights associated with such Common Shares.
 
  (c) Certificates for Common Shares which become outstanding (including,
without limitation, reacquired Common Shares referred to in the last sentence
of this paragraph (c)) after the Record Date but prior to the
 
                                      D-4
<PAGE>
 
earliest of the Distribution Date, the Redemption Date or the Final Expiration
Date shall be deemed also to be certificates for Rights and shall bear the
following legend:
 
    This certificate also evidences and entitles the holder hereof to certain
  rights as set forth in a Rights Agreement between WAI, Inc. and Liberty
  Bank and Trust Company of Oklahoma City, N.A., dated as of    , 1997 (the
  "Rights Agreement"), the terms of which are hereby incorporated herein by
  reference and a copy of which is on file at the principal executive offices
  of WAI, Inc. Under certain circumstances, as set forth in the Rights
  Agreement, such Rights will be evidenced by separate certificates and will
  no longer be evidenced by this certificate. WAI, Inc. will mail to the
  holder of this certificate a copy of the Rights Agreement without charge
  after receipt of a written request therefor from such holder. 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 an Affiliate
  or Associate thereof (as defined in the Rights Agreement) and certain
  related persons, whether currently held by or on behalf of such Person or
  by any subsequent holder, may become null and void.
 
With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby.
In the event that the Corporation purchases or acquires any Common Shares
after the Record Date but prior to the Distribution Date, any Rights
associated with such Common Shares shall be deemed cancelled and retired so
that the Corporation shall not be entitled to exercise any Rights associated
with the Common Shares which are no longer outstanding.
 
  Section 4. Form of Right Certificate. (a) The Right Certificates (and the
forms of election to purchase and of assignment to be printed on the reverse
thereof) shall 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 Corporation 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
Right Certificates shall entitle the holders thereof to purchase such number
of one one-hundredths of a Preferred Share as shall be set forth therein at
the price per one one-hundredth of a Preferred Share set forth therein (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 Right Certificate issued pursuant to Section 3(a) or Section 22
hereof that represents Rights which are null and void pursuant to Section 7(e)
of this Agreement and any Right Certificate issued pursuant to Section 6 or
Section 11 hereof upon transfer, exchange, replacement or adjustment of any
other Right Certificate referred to in this sentence, shall contain (to the
extent feasible) the following legend:
 
    The Rights represented by this Right 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 Right Certificate and the Rights represented
  hereby are null and void.
 
Provisions of Section 7(e) of this Rights Agreement shall be operative whether
or not the foregoing legend is contained on any such Right Certificate.
 
  Section 5. Countersignature and Registration. The Right Certificates shall
be executed on behalf of the Corporation by its Chairman of the Board, its
Chief Executive Officer, its President, any of its Vice Presidents, or its
Treasurer, either manually or by facsimile signature, shall have affixed
thereto the Corporation's seal or a facsimile thereof, and shall be attested
by the Secretary or an Assistant Secretary of the Corporation, either manually
or by facsimile signature. The Right Certificates shall be countersigned by
the Rights Agent and shall not be valid for any purpose unless so
countersigned. In case any officer of the Corporation who shall have signed
 
                                      D-5
<PAGE>
 
any of the Right Certificates shall cease to be such officer of the
Corporation before countersignature by the Rights Agent and issuance and
delivery by the Corporation, such Right Certificates may nevertheless be
countersigned by the Rights Agent and issued and delivered by the Corporation
with the same force and effect as though the person who signed such Right
Certificates had not ceased to be such officer of the Corporation; and any
Right Certificate may be signed on behalf of the Corporation by any person
who, at the actual date of the execution of such Right Certificate, shall be a
proper officer of the Corporation to sign such Right Certificate, although at
the date of the execution of this Rights Agreement any such person was not
such an officer.
 
  Following the Distribution Date, the Rights Agent will keep or cause to be
kept, at its office designated as the appropriate place for surrender of such
Right Certificate for transfer, books for registration and transfer of the
Right Certificates issued hereunder. Such books shall show the names and
addresses of the respective holders of the Right Certificates, the number of
Rights evidenced on its face by each of the Right Certificates and the
certificate number and the date of each of the Right Certificates.
 
  Section 6. Transfer, Split-Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificate. 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 earlier of the Redemption Date or the Final
Expiration Date, any Right Certificate or Right Certificates may be
transferred, split up, combined or exchanged for another Right Certificate or
Right Certificates, entitling the registered holder to purchase a like number
of one one-hundredths of a Preferred Share (or, following a Triggering Event,
other securities, as the case may be) as the Right Certificate or Right
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 Right Certificate or Right Certificates
shall make such request in writing delivered to the Rights Agent, and shall
surrender the Right Certificate or Right Certificates to be transferred, split
up, combined or exchanged at the principal office or offices of the Rights
Agent designated for such purpose. Neither the Rights Agent nor the
Corporation shall be obligated to take any action whatsoever with respect to
the transfer of any such surrendered Right Certificate until the registered
holder shall have completed and signed the certificate contained in the form
of assignment on the reverse side of such Right Certificate and shall have
provided such additional evidence of the identity of the Beneficial Owner (or
former Beneficial Owner) or Affiliates or Associates thereof as the
Corporation 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 Right Certificate or Right
Certificates, as the case may be, as so requested. The Corporation may require
payment of a sum sufficient to cover any tax or governmental charge that may
be imposed in connection with any transfer, split-up, combination or exchange
of Right Certificates.
 
  Upon receipt by the Corporation and the Rights Agent of evidence reasonably
satisfactory to them of the loss, theft, destruction or mutilation of a Right
Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Corporation's request,
reimbursement to the Corporation and the Rights Agent of all reasonable
expenses incidental thereto, and upon surrender to the Rights Agent and
cancellation of the Right Certificate if mutilated, the Corporation will make
and deliver a new Right Certificate of like tenor to the Rights Agent for
countersignature and delivery to the registered holder in lieu of the Right
Certificate so lost, stolen, destroyed or mutilated.
 
  Section 7. Exercise of Rights; Purchase Price; Expiration Date of
Rights. (a) Subject to Section 7(e) hereof, the registered holder of any Right
Certificate may exercise the Rights evidenced thereby (except as otherwise
provided herein) in whole or in part at any time after the Distribution Date
upon surrender of the Right Certificate, with the form of election to purchase
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 for the
total number of one one-hundredths of a Preferred Share (or other securities,
as the case may be) as to which such surrendered Rights are exercised, at or
prior to the earliest of (i) the Close of Business on November 26, 2007 (the
"Final Expiration Date"), (ii) the time at which the Rights are redeemed as
provided in Section 23 hereof (the "Redemption Date"), (iii) the time at which
the
 
                                      D-6
<PAGE>
 
Rights are exchanged as provided in Section 24 hereof, or (iv) the
consummation of a transaction contemplated by Section 13(d) hereof.
 
  (b) The Purchase Price for each one-hundredth of a Preferred Share pursuant
to the exercise of a Right shall initially be $80.00, shall be subject to
adjustment from time to time as provided in the next sentence and in Sections
11 and 13(a) hereof and shall be payable in accordance with paragraph (c)
below. Anything in this Agreement to the contrary notwithstanding, in the
event that at any time after the date of this Agreement and prior to the
Distribution Date, the Corporation shall (i) declare or pay any dividend on
the Common Shares payable in Common Shares or (ii) effect a subdivision,
combination or consolidation of the Common Shares (by reclassification or
otherwise than by payment of dividends in Common Shares) into a greater or
lesser number of Common Shares, then in any such case, each Common Share
outstanding following such subdivision, combination or consolidation shall
continue to have one Right (subject to adjustment as provided herein)
associated therewith and the Purchase Price following any such event shall be
proportionately adjusted to equal the result obtained by multiplying the
Purchase Price immediately prior to such event by a fraction the numerator of
which shall be the total number of Common Shares outstanding immediately prior
to the occurrence of the event and the denominator of which shall be the total
number of Common Shares outstanding immediately following the occurrence of
such event. The adjustment provided for in the preceding sentence shall be
made successively whenever such a dividend is declared or paid or such a
subdivision, combination or consolidation is effected.
 
  (c) Upon receipt of a Right Certificate representing exercisable Rights,
with the form of election to purchase and the certificate duly executed,
accompanied by payment of the Purchase Price for the Preferred Shares (or
other securities, as the case may be) to be purchased and an amount equal to
any applicable transfer tax required to be paid by the holder of such Right
Certificate in accordance with Section 6 hereof by certified check, cashier's
check or money order payable to the order of the Corporation, the Rights Agent
shall thereupon promptly (i) (A) requisition from any transfer agent of the
Preferred Shares certificates for the number of Preferred Shares to be
purchased and the Corporation hereby irrevocably authorizes its transfer agent
to comply with all such requests, or (B) requisition from the depositary agent
(if the Corporation, in its sole discretion, shall have elected to deposit the
Preferred Shares issuable upon exercise of the Rights hereunder into a
depositary) depositary receipts representing such number of one one-hundredths
of a Preferred Share as are to be purchased (in which case certificates for
the Preferred Shares represented by such receipts shall be deposited by the
transfer agent with the depositary agent) and the Corporation will direct the
depositary agent to comply with such requests, (ii) when appropriate,
requisition from the Corporation the amount of cash to be paid in lieu of
issuance of fractional shares in accordance with Section 14 hereof, (iii)
after receipt of such certificates or depositary receipts, cause the same to
be delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder, and (iv) when appropriate, after receipt thereof, deliver such cash to
or upon the order of the registered holder of such Right Certificate. In the
event that the Corporation is obligated to issue other securities (including
Common Shares) of the Corporation pursuant to Section 11(a) hereof, the
Corporation will make all arrangements necessary so that such other securities
are available for distribution by the Rights Agent, if and when appropriate.
 
  In addition, in the case of an exercise of the Rights by a holder pursuant
to Section 11(a)(ii), the Rights Agent shall return such Right Certificate to
the registered holder thereof after imprinting, stamping or otherwise
indicating thereon that the rights represented by such Right Certificate no
longer include the rights provided by Section 11(a)(ii) of the Rights
Agreement and if less than all the Rights represented by such Right
Certificate were so exercised, the Rights Agent shall indicate on the Right
Certificate the number of Rights represented thereby which continue to include
the rights provided by Section 11(a)(ii).
 
  (d) In case the registered holder of any Right Certificate shall exercise
less than all the Rights evidenced thereby, a new Right Certificate evidencing
Rights equivalent to the Rights remaining unexercised shall be issued by the
Rights Agent to the registered holder of such Right Certificate or to his duly
authorized assigns, subject to the provisions of Section 14 hereof, or the
Rights Agent shall place an appropriate notation on the Right Certificate with
respect to those Rights exercised.
 
                                      D-7
<PAGE>
 
  (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 Affiliate or Associate of
an Acquiring Person, (ii) a transferee of an Acquiring Person (or of any
Affiliate or Associate thereof) who becomes a transferee after the Acquiring
Person becomes such, or (iii) a transferee of an Acquiring Person (or of any
Affiliate or Associate thereof) 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 a continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a
transfer which the Board of Directors of the Corporation 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 Corporation shall use all reasonable efforts to
insure that the provisions of this Section 7(e) and Section 4(b) hereof are
complied with, but shall have no liability to any holder of Right 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 Corporation 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 Right Certificate
surrendered for such exercise, and (ii) provided such additional evidence of
the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Corporation shall reasonably request.
 
  Section 8. Cancellation and Destruction of Right Certificates. All Right
Certificates surrendered for the purpose of exercise (other than a partial
exercise), transfer, split up, combination or exchange shall, if surrendered
to the Corporation or to any of its agents, be delivered to the Rights Agent
for cancellation or in canceled form, or, if surrendered to the Rights Agent,
shall be canceled by it, and no Right Certificates shall be issued in lieu
thereof except as expressly permitted by any of the provisions of this Rights
Agreement. The Corporation shall deliver to the Rights Agent for cancellation
and retirement, and the Rights Agent shall so cancel and retire, any other
Right Certificate purchased or acquired by the Corporation otherwise than upon
the exercise thereof. The Rights Agent shall deliver all canceled Right
Certificates to the Corporation, or shall, at the written request of the
Corporation, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Corporation.
 
  Section 9. Reservation and Availability of Capital Stock. The Corporation
covenants and agrees that at all times prior to the occurrence of a Section
11(a)(ii) Event it will cause to be reserved and kept available out of its
authorized and unissued Preferred Shares, or any authorized and issued
Preferred Shares held in its treasury, the number of Preferred Shares that
will be sufficient to permit the exercise in full of all outstanding Rights
and, after the occurrence of a Section 11(a)(ii) Event, shall, to the extent
reasonably practicable, so reserve and keep available a sufficient number of
Common Shares (and/or other securities) which may be required to permit the
exercise in full of the Rights pursuant to this Agreement.
 
  So long as the Preferred Shares (and, after the occurrence of a Section
11(a)(ii) Event, Common Shares, or any other securities, as the case may be)
issuable upon the exercise of the Rights may be listed on any national
securities exchange, the Corporation 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.
 
  The Corporation covenants and agrees that it will take all such action as
may be necessary to ensure that all Preferred Shares (or Common Shares and/or
other securities, as the case may be) delivered upon exercise of Rights shall,
at the time of delivery of the certificates for such shares or other
securities (subject to payment of
 
                                      D-8
<PAGE>
 
the Purchase Price), be duly and validly authorized and issued and fully paid
and non-assessable shares or securities.
 
  The Corporation further covenants and agrees that it will pay when due and
payable any and all federal and state transfer taxes and charges which may be
payable in respect of the issuance or delivery of the Right Certificates or of
any Preferred Shares (or Common Shares and/or other securities, as the case
may be) upon the exercise of Rights. The Corporation shall not, however, be
required to pay any transfer tax which may be payable in respect of any
transfer or delivery of Right Certificates to a person other than, or the
issuance or delivery of certificates or depositary receipts for the Preferred
Shares (or Common Shares and/or other securities, as the case may be) in a
name other than that of, the registered holder of the Right Certificate
evidencing Rights surrendered for exercise, or to issue or to deliver any
certificates or depositary receipts for Preferred Shares (or Common Shares
and/or other securities, as the case may be) upon the exercise of any Rights,
until any such tax shall have been paid (any such tax being payable by the
holder of such Right Certificate at the time of surrender) or until it has
been established to the Corporation's reasonable satisfaction that no such tax
is due.
 
  The Corporation shall use its best efforts to (i) file, as soon as
practicable following the Shares Acquisition Date (or, if required by law, at
such earlier time following the Distribution Date as so required), 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 and the
rules and regulations thereunder) until the date of the expiration of the
rights provided by Section 11(a)(ii). The Corporation will also take such
action as may be appropriate under the blue sky laws of the various states.
 
  Section 10. Preferred Shares Record Date. Each Person in whose name any
certificate for Preferred Shares (or Common Shares 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 the Preferred Shares (or
Common Shares and/or other securities, as the case may be) represented thereby
on, and such certificate shall be dated, the date upon which the Right
Certificate evidencing such Rights was duly surrendered and payment of the
Purchase Price (and any applicable transfer taxes) was made; provided,
however, that, if the date of such surrender and payment is a date upon which
the Preferred Shares (or Common Shares and/or other securities, as the case
may be) transfer books of the Corporation are closed, such person shall be
deemed to have become the record holder of such shares on, and such
certificate shall be dated, the next succeeding Business Day on which the
Preferred Shares (or Common Shares and/or other securities, as the case may
be) transfer books of the Corporation are open.
 
  Section 11. Adjustment of Purchase Price, Number and Kind of Shares or
Number of Rights. The Purchase Price, the number and kind of shares or other
securities 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 Corporation shall at any time after the date of
this Agreement (A) declare a dividend on the Preferred Shares payable in
Preferred Shares, (B) subdivide the outstanding Preferred Shares, (C) combine
the outstanding Preferred Shares into a smaller number of Preferred Shares or
(D) issue any shares of its capital stock in a reclassification of the
Preferred Shares (including any such reclassification in connection with a
consolidation or merger in which the Corporation 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 capital
stock issuable on such date, shall be proportionately adjusted so that the
holder of any Right exercised after such time shall be entitled to receive the
aggregate number and kind of shares of capital stock which, if such Right had
been exercised immediately prior to such date and at a time when the Preferred
Shares transfer books of the Corporation were open, such holder would have
owned upon such exercise and been entitled to receive by virtue of such
dividend, subdivision, combination or reclassification; provided, however,
that in no event shall the consideration to be paid upon the exercise of one
Right be less than the aggregate par
 
                                      D-9
<PAGE>
 
value of the shares of capital stock of the Corporation issuable upon exercise
of one Right. If an event occurs which would require an adjustment under both
Section 11(a)(i) and Section 11(a)(ii), 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).
 
  (ii) In the event any Person, alone or together with its Affiliates and
Associates, shall become an Acquiring Person, then proper provision shall be
made so that each holder of a Right (except as provided below and in Section
7(e) hereof) shall, for a period of 60 days after the later of (i) the
occurrence of any such event or (ii) the effective date of an appropriate
registration statement under the Act pursuant to Section 9 hereof, have a
right to receive, upon exercise thereof at a price equal to the then current
Purchase Price, in accordance with the terms of this Agreement, such number of
Common Shares (or, in the discretion of the Board of Directors, one one-
hundredths of a Preferred Share) as shall equal the result obtained by (x)
multiplying the then current Purchase Price by the then number of one one-
hundredths of a Preferred Share for which a Right was exercisable immediately
prior to the first occurrence of a Section 11(a)(ii) Event and (y) dividing
that product by 50% of the then current per share market price of the
Corporation's Common Shares (determined pursuant to Section 11(d) hereof) on
the date of such first occurrence (such number of shares being referred to as
the "Adjustment Shares"); provided, however, that if the transaction that
would otherwise give rise to the foregoing adjustment is also subject to the
provisions of Section 13 hereof, then only the provisions of Section 13 hereof
shall apply and no adjustment shall be made pursuant to this Section
11(a)(ii).
 
  (iii) In the event that there shall not be sufficient treasury shares or
authorized but unissued (and unreserved) Common Shares to permit the exercise
in full of the Rights in accordance with the foregoing subparagraph (ii) and
the Rights become so exercisable (and the Board has determined to make the
Rights exercisable into fractions of a Preferred Share), notwithstanding any
other provision of this Agreement, to the extent necessary and permitted by
applicable law, each Right shall thereafter represent the right to receive,
upon exercise thereof at the then current Purchase Price in accordance with
the terms of this Agreement, (x) a number of (or fractions of) Common Shares
(up to the maximum number of Common Shares which may permissibly be issued)
and (y) one one-hundredth of a Preferred Share or a number of (or fractions
of) other equity securities of the Corporation (or, in the discretion of the
Board of Directors, debt) which the Board of Directors of the Corporation has
determined to have the same aggregate current market value (determined
pursuant to Sections 11(d)(i) and (ii) hereof, to the extent applicable) as
one Common Share (such number of (or fractions of) Preferred Shares (or other
equity securities or debt of the Corporation) being referred to as a "capital
stock equivalent"), equal in the aggregate to the number of Adjustment Shares;
provided, however, if sufficient Common Shares and/or capital stock
equivalents are unavailable, then the Corporation shall, to the extent
permitted by applicable law, take all such action as may be necessary to
authorize additional Common Shares or capital stock equivalents for issuance
upon exercise of the Rights, including the calling of a meeting of
stockholders; and provided, further, that if the Corporation is unable to
cause sufficient Common Shares and/or capital stock equivalents to be
available for issuance upon exercise in full of the Rights, then each Right
shall thereafter represent the right to receive the Adjusted Number of Shares
upon exercise at the Adjusted Purchase Price (as such terms are hereinafter
defined). As used herein, the term "Adjusted Number of Shares" shall be equal
to that number of (or fractions of) Common Shares (and/or capital stock
equivalents) equal to the product of (x) the number of Adjustment Shares and
(y) a fraction, the numerator of which is the number of Common Shares (and/or
capital stock equivalents) available for issuance upon exercise of the Rights
and the denominator of which is the aggregate number of Adjustment Shares
otherwise issuable upon exercise in full of all Rights (assuming there were a
sufficient number of Common Shares available) (such fraction being referred to
as the "Proration Factor"). The "Adjusted Purchase Price" shall mean the
product of the Purchase Price and the Proration Factor. The Board of Directors
may, but shall not be required to, establish procedures to allocate the right
to receive Common Shares and capital stock equivalents upon exercise of the
Rights among holders of Rights.
 
  (b) In case the Corporation shall fix a record date for the issuance of
rights (other than the Rights), options or warrants to all holders of
Preferred Shares entitling them (for a period expiring within 45 calendar days
after such record date) to subscribe for or purchase Preferred Shares (or
shares having the same rights and privileges
 
                                     D-10
<PAGE>
 
as the Preferred Shares ("equivalent preferred shares") or securities
convertible into Preferred Shares or equivalent preferred shares at a price
per Preferred Share or equivalent preferred share (or having a conversion
price per share, if a security convertible into Preferred Shares or equivalent
preferred shares) less than the then current per share market price of the
Preferred Shares (as determined pursuant to Section 11(d) hereof) 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
Preferred Shares outstanding on such record date plus the number of Preferred
Shares which the aggregate offering price of the total number of Preferred
Shares and/or equivalent preferred shares so to be offered (and/or the
aggregate initial conversion price of the convertible securities so to be
offered) would purchase at such current per share market price, and the
denominator of which shall be the number of Preferred Shares outstanding on
such record date plus the number of additional Preferred Shares and/or
equivalent preferred shares to be offered for subscription or purchase (or
into which the convertible securities so to be offered are initially
convertible); provided, however, that in no event shall the consideration to
be paid upon the exercise of one Right be less than the aggregate par value of
the shares of capital stock of the Corporation issuable upon exercise of one
Right. In case such subscription price may be paid in a consideration part or
all of which shall be in a form other than cash, the value of such
consideration shall be determined in good faith by the Board of Directors of
the Corporation, whose determination shall be described in a statement filed
with the Rights Agent and shall be binding on the Rights Agent. Preferred
Shares owned by or held for the account of the Corporation 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, options 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 Corporation shall fix a record date for the making of a
distribution to all holders of the Preferred Shares (including any such
distribution made in connection with a consolidation or merger in which the
Corporation is the continuing or surviving corporation) of evidences of
indebtedness or assets (other than a regular quarterly cash dividend or a
dividend payable in Preferred Shares) or subscription rights or warrants
(excluding those referred to in Section 11(b) hereof), the Purchase Price to
be in effect after such record date 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 then current per share market price (as
determined pursuant to Section 11(d) hereof) of the Preferred Shares on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Corporation, whose determination shall be described
in a statement filed with the Rights Agent and shall be binding on the Rights
Agent) of the portion of the assets or evidences of indebtedness so to be
distributed or of such subscription rights or warrants applicable to one
Preferred Share and the denominator of which shall be such current per share
market price of the Preferred Shares; provided, however, that in no event
shall the consideration to be paid upon the exercise of one Right be less than
the aggregate par value of the shares of capital stock of the Corporation to
be issued upon exercise of one Right. 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 again be adjusted to be
the Purchase Price which would then be in effect if such record date had not
been fixed.
 
  (d) (i) For the purpose of any computation hereunder, the "current per share
market price" of any security (a "Security" for the purpose of this Section
11(d)(i)) on any date shall be deemed to be the average of the daily closing
prices per share of such Security for the thirty (30) consecutive Trading Days
(as such term is hereinafter defined) immediately prior to such date;
provided, however, that in the event that the current per share market price
of the Security is determined during a period following the announcement by
the issuer of such Security of (A) a dividend or distribution on such Security
payable in shares of such Security or securities convertible into such shares,
or (B) any subdivision, combination or reclassification of such Security and
prior to the expiration of thirty (30) Trading Days after the ex-dividend date
for such dividend or distribution, or the record date for such subdivision,
combination or reclassification, then, and in each such case, the current per
share market price shall be appropriately adjusted to reflect the current
market price per share equivalent of such Security. The closing price for each
day shall be the last sale price, regular way, or, in case no such sale takes
 
                                     D-11
<PAGE>
 
place on such day, the average of the closing bid and asked prices, regular
way, in either case as reported in the principal consolidated transaction
reporting system with respect to securities listed or admitted to trading on
the New York Stock Exchange or, if the Security is not listed or admitted to
trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Security is listed or
admitted to trading or, if the Security is not listed or admitted to trading
on any national securities exchange, the last quoted price or, if not so
quoted, the average of the high bid and low asked prices in the over-the-
counter market, as reported by the National Association of Securities Dealers,
Inc. Automated Quotations System ("NASDAQ") or such other system then in use,
or, if on any such date the Security is not quoted by any such organization,
the average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Security selected by the Board of
Directors of the Corporation. If on any such date no such market maker is
making a market in the Security, the fair value of the Security on such date
as determined in good faith by the Board of Directors of the Corporation shall
be used. The term "Trading Day" shall mean a day on which the principal
national securities exchange on which the Security is listed or admitted to
trading is open for the transaction of business or, if the Security is not
listed or admitted to trading on any national securities exchange, a Business
Day. Subject to Section 11(d)(ii), if any Security is not publicly held or so
listed or traded, "current per share market price" of such Security shall mean
the fair market value per share as determined in good faith by the Board of
Directors of the Corporation, whose determination shall be described in a
statement filed with the Rights Agent and shall be binding on the Rights
Agent.
 
  (ii) For the purpose of any computation hereunder, the "current per share
market price" of the Preferred Shares shall be determined in accordance with
the method set forth in Section 11(d)(i). If the Preferred Shares are not
publicly traded, the current per share market price of the Preferred Shares
shall be conclusively deemed to be the current per share market price of the
Common Shares as determined pursuant to Section 11(d)(i) (appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof), multiplied by one hundred. If neither the
Common Shares nor the Preferred Shares are publicly held or so listed or
traded, "current per share market price" shall mean the fair value per share
as determined in good faith by the Board of Directors of the Corporation,
whose determination shall be described in a statement filed with the Rights
Agent and shall be binding on the Rights Agent.
 
  (e) Notwithstanding anything herein to the contrary, no adjustment in the
Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least 1% in the Purchase Price; provided, however,
that any adjustments which by reason of this Section 11(e) are not required to
be made 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 one one-hundredth-thousandth of a Preferred
Share or one ten-thousandth of any other share or security, as the case may
be. Notwithstanding the first sentence of this Section 11(e), any adjustment
required by this Section 11 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 Final 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 of the Corporation
other than Preferred Shares, thereafter the number of other shares so
receivable upon exercise of any Right shall be subject to adjustment from time
to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to the Preferred Shares contained in Sections 11(a)
through (c), inclusive, and the provisions of Sections 7, 9, 10, 13 and 14
with respect to the Preferred Shares shall apply on like terms to any such
other shares.
 
  (g) All Rights originally issued by the Corporation 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-hundredths of a
Preferred Share purchasable from time to time hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.
 
 
                                     D-12
<PAGE>
 
  (h) Unless the Corporation 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-
hundredths of a Preferred Share (calculated to the nearest one one-hundredth
thousandths of a Preferred Share) obtained by (i) multiplying (x) the number
of Preferred Shares covered by a Right immediately prior to this adjustment of
the Purchase Price 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 Corporation may elect on or after the date of any adjustment of the
Purchase Price to adjust the number of Rights, in lieu of any adjustment in
the number of one one-hundredths of a Preferred Share purchasable upon the
exercise of a Right. Each of the Rights outstanding after such adjustment of
the number of Rights shall be exercisable for the number of one one-hundredths
of a Preferred Share for which a Right was exercisable immediately prior to
such adjustment. Each Right held of record prior to such adjustment of the
number of Rights 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 Corporation
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 Right Certificates have been issued, shall be at least ten (10) days later
than the date of the public announcement. If Right Certificates have been
issued, upon each adjustment of the number of Rights pursuant to this Section
11(i), the Corporation shall, as promptly as practicable, cause to be
distributed to holders of record of Right Certificates on such record date
Right Certificates evidencing, subject to Section 14 hereof, the additional
Rights to which such holders shall be entitled as a result of such adjustment,
or, at the option of the Corporation, shall cause to be distributed to such
holders of record in substitution and replacement for the Right Certificates
held by such holders prior to the date of adjustment, and upon surrender
thereof, if required by the Corporation, new Right Certificates evidencing all
the Rights to which such holders shall be entitled after such adjustment.
Right Certificates so to be distributed shall be issued, executed and
countersigned in the manner provided for herein and shall be registered in the
names of the holders of record of Right Certificates on the record date
specified in the public announcement.
 
  (j) Irrespective of any adjustment or change in the Purchase Price or the
number of one one-hundredths of a Preferred Share issuable upon the exercise
of the Rights, the Right Certificates theretofore and thereafter issued may
continue to express the Purchase Price and the number of one one-hundredths of
a Preferred Share which were expressed in the initial Right Certificates
issued hereunder.
 
  (k) Before taking any action that would cause an adjustment reducing the
Purchase Price below the then par value, if any, of the number of one one-
hundredths of a Preferred Share, Common Shares or other securities issuable
upon exercise of the Rights, the Corporation shall take any corporate action
which may, in the opinion of its counsel, be necessary in order that the
Corporation may validly and legally issue such number of fully paid and
nonassessable one one-hundredths of a Preferred Share, Common Shares or other
securities 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 Corporation may elect to defer until the occurrence of such event
the issuance to the holder of any Right exercised after such record date the
Preferred Shares, Common Shares or other securities of the Corporation, if
any, issuable upon such exercise over and above the Preferred Shares, Common
Shares or other securities of the Corporation, if any, issuable upon exercise
on the basis of the Purchase Price in effect prior to such adjustment;
provided, however, that the Corporation shall deliver to such holder a due
bill or other appropriate instrument evidencing such holder's right to receive
such additional shares upon the occurrence of the event requiring such
adjustment.
 
 
                                     D-13
<PAGE>
 
  (m) Notwithstanding anything in this Section 11 to the contrary, the
Corporation 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 it in its sole discretion shall determine to be advisable
in order that any (i) consolidation or subdivision of the Preferred Shares,
(ii) issuance wholly for cash of Preferred Shares at less than the current
market price, (iii) issuance wholly for cash of Preferred Shares or securities
which by their terms are convertible into or exchangeable for Preferred
Shares, (iv) stock dividends or (v) issuance of rights, options or warrants
referred to in this Section 11, hereafter made by the Corporation to holders
of its Preferred Shares shall not be taxable to such stockholders.
 
  (n) The Corporation 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 Corporation in a transaction which does not violate
Section 11(o) hereof), (ii) merge with or into any other Person (other than a
Subsidiary of the Corporation in a transaction which does not violate 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
Corporation and its Subsidiaries (taken as a whole) to any other Person or
Persons (other than the Corporation and/or any of its Subsidiaries in one or
more transactions each of which does not violate Section 11(o) hereof), if (x)
at the time of or immediately after such consolidation, merger, sale or
transfer there are any charter or by-law provisions or any rights, warrants or
other instruments or securities outstanding or agreements in effect or other
actions taken, which would materially 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. The
Corporation shall not consummate any such consolidation, merger, sale or
transfer unless prior thereto the Corporation and such other Person shall have
executed and delivered to the Rights Agent a supplemental agreement evidencing
compliance with this Section 11(n).
 
  (o) The Corporation covenants and agrees that, after the Distribution Date,
it will not, except as permitted by Section 23 or Section 27 hereof, take (or
permit any Subsidiary to take) any action the purpose of which is to, or if at
the time such action is taken it is reasonably foreseeable that the effect of
such action is to, materially diminish or otherwise eliminate the benefits
intended to be afforded by the Rights.
 
  (p) The exercise of Rights under Section 11(a)(ii) shall only result in the
reduction of rights under Section 11(a)(ii) to the extent so exercised and
shall not otherwise affect the rights represented by the Rights under this
Rights Agreement, including the rights represented by Section 13.
 
  Section 12. Certificate of Adjusted Purchase Price or Number of
Shares. Whenever an adjustment is made as provided in Sections 11 or 13
hereof, the Corporation shall promptly (a) prepare a certificate setting forth
such adjustment, and a brief statement of the facts accounting for such
adjustment, (b) file with the Rights Agent and with each transfer agent for
the Common Shares and the Preferred Shares a copy of such certificate and (c)
mail a brief summary thereof to each holder of a Right Certificate in
accordance with Section 26 hereof. The Rights Agent shall be fully protected
in relying on any such certificate and on any adjustment therein contained and
shall not be deemed to have knowledge of such adjustment unless and until it
shall have received such certificate.
 
  Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning
Power. (a) In the event that, on or following the Shares Acquisition Date,
directly or indirectly, (x) the Corporation shall consolidate with, or merge
with and into, any Interested Stockholder or, if in such merger or
consolidation all holders of Common Shares are not treated alike, any other
Person, (y) the Corporation shall consolidate with, or merge with, any
Interested Stockholder or, if in such merger or consolidation all holders of
Common Shares are not treated alike, any other Person, and the Corporation
shall be the continuing or surviving corporation of such consolidation or
merger (other than, in a case of any transaction described in (x) or (y), a
merger or consolidation which would result in all of the securities generally
entitled to vote in the election of directors ("voting securities") of the
 
                                     D-14
<PAGE>
 
Corporation outstanding immediately prior thereto continuing to represent
(either by remaining outstanding or by being converted into securities of the
surviving entity) all of the voting securities of the Corporation or such
surviving entity outstanding immediately after such merger or consolidation
and the holders (and relative percentage holdings of each such holder) of such
securities not having changed as a result of such merger or consolidation), or
(z) the Corporation 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 more than 50% of
the assets or earning power of the Corporation and its Subsidiaries (taken as
a whole) to any Interested Stockholder or Persons or, if in such transaction
all holders of Common Shares are not treated alike, any other Person (other
than the Corporation or any Subsidiary of the Corporation in one or more
transactions each of which does not violate Section 11(o) hereof), then, and
in each such case (except as provided in 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 a price equal to the then current Purchase Price, in
accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of freely tradable Common Shares of the Principal Party (as
hereinafter defined), not subject to any liens, encumbrances, rights of first
refusal or other adverse claims, as shall equal the result obtained by (A)
multiplying the then current Purchase Price by the number of one one-
hundredths of a Preferred Share for which a Right is then exercisable (without
taking into account any adjustment previously made pursuant to Section
11(a)(ii)) and dividing that product by (B) 50% of the then current per share
market price of the Common Shares of such Principal Party (determined pursuant
to Section 11(d) hereof) 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
Corporation pursuant to this Agreement; (iii) the term "Corporation" 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; and (iv)
such Principal Party shall take such steps (including, but not limited to, the
reservation of a sufficient number of its Common Shares) 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 the Common Shares thereafter deliverable upon the
exercise of the Rights.
 
  (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 Common Shares of the Corporation 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 (including,
  if applicable, the Corporation if it is the surviving corporation); 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 of the
  foregoing cases, (1) if the Common Shares of such Person are not at such
  time and have 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 Shares of
  which are and have been so registered, "Principal Party" shall refer to
  such other Person; (2) in case such Person is a Subsidiary, directly or
  indirectly, of more than one Person, the Common Shares 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 Shares having the
  greatest aggregate market value; and (3) in case such Person is owned,
  directly or indirectly, by a joint venture formed by two or more Persons
  that are not owned, directly or indirectly, by the same Person, the rules
  set forth in (1) and (2) above shall apply to each of the chains of
  ownership having an interest in such joint venture as if such party were a
  "Subsidiary" of both or all of such joint venturers and the Principal
  Parties in each such chain shall bear the obligations set forth in this
  Section 13 in the same ratio as their direct or indirect interests in such
  Person bear to the total of such interests.
 
  (c) The Corporation shall not consummate any such consolidation, merger,
sale or transfer unless the Principal Party shall have a sufficient number of
its authorized Common Shares which have not been issued or
 
                                     D-15
<PAGE>
 
reserved for issuance to permit the exercise in full of the Rights in
accordance with this Section 13 and unless prior thereto the Corporation 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, sale or transfer mentioned in
paragraph (a) of this Section 13, the Principal Party at its own expense
shall:
 
    (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 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 Final Expiration Date;
 
    (ii) use its best efforts to qualify or register the Rights and the
  securities purchasable upon exercise of the Rights under the blue sky laws
  of such jurisdictions as may be necessary or appropriate; and
 
    (iii) deliver to holders of the Rights historical financial statements
  for the Principal Party 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. The rights under this
Section 13 shall be in addition to the rights to exercise Rights and
adjustments under Section 11(a)(ii) and shall survive any exercise thereof.
 
  (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 Common Shares pursuant to a Permitted Offer (or a wholly
owned Subsidiary of any such Person or Persons); (ii) the price per Common
Share offered in such transaction is not less than the price per Common Share
paid to all holders of Common Shares whose shares were purchased pursuant to
such Permitted Offer; and (iii) the form of consideration offered in such
transaction is the same as the form of consideration paid pursuant to such
Permitted 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 Corporation
shall not be required to issue fractions of Rights or to distribute Right
Certificates which evidence fractional Rights. In lieu of such fractional
Rights, there shall be paid to the registered holders of the Right
Certificates with regard to which such fractional Rights would otherwise be
issuable, an amount in cash equal to the same fraction of the current market
value of a whole Right. For the 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 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 New York Stock
Exchange or, if the Rights are not listed or admitted to trading on the New
York Stock Exchange, as reported in the principal consolidated transaction
reporting system with respect to securities listed on the principal national
securities exchange on which the Rights are listed or admitted to trading or,
if the Rights are not listed or admitted to trading on any national securities
exchange, the last quoted price or, if not so quoted, the average of the high
bid and low asked prices in the 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 of Directors of the Corporation. 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 of Directors
of the Corporation shall be used.
 
  (b) The Corporation shall not be required to issue fractions of Preferred
Shares (other than fractions which are one one-hundredths or integral
multiples of one one-hundredth of a Preferred Share) upon exercise of the
Rights or to distribute certificates which evidence fractional Preferred
Shares (other than fractions which are one one-hundredths or integral
multiples of one one-hundredth of a Preferred Share). Fractions of Preferred
Shares in integral multiples of one one-hundredth of a Preferred Share may, at
the election of the corporation, be
 
                                     D-16
<PAGE>
 
evidenced by depositary receipts, pursuant to an appropriate agreement between
the Corporation and a depositary selected by it; provided that such agreement
shall provide that the holders of such depositary receipts shall have the
rights, privileges and preferences to which they are entitled as beneficial
owners of the Preferred Shares represented by such depositary receipts. In
lieu of fractional Preferred Shares that are not one one-hundredth or integral
multiples of one one-hundredth of a Preferred Share, the Corporation shall pay
to the registered holders of Right 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 Preferred Share. For the purposes of this
Section 14(b), the current market value of a Preferred Share shall be the
closing price of a Preferred Share (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 one of the transactions or events specified
in Section 11 giving rise to the right to receive Common Shares, capital stock
equivalents (other than Preferred Shares) or other securities upon the
exercise of a Right, the Corporation shall not be required to issue fractions
of shares or units of such Common Shares, capital stock equivalents or other
securities upon exercise of the Rights or to distribute certificates which
evidence fractions of such Common Shares, capital stock equivalents or other
securities. In lieu of fractional shares or units of such Common Shares,
capital stock equivalents or other securities, the Corporation may pay to the
registered holders of Right 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 a share or unit of such Common Shares, capital stock
equivalents or other securities. For purposes of this Section 14(c), the
current market value shall be determined in the manner set forth in Section
11(d) hereof for the Trading Day immediately prior to the date of such
exercise and, if such capital stock equivalent is not traded, each such
capital stock equivalent shall have the value of one one-hundredth of a
Preferred Share.
 
  (d) The holder of a Right by the acceptance of the Right expressly waives
his right to receive any fractional Rights or any fractional share upon
exercise of a Right (except as provided above).
 
  Section 15. Rights of Action. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the
Right Certificates (and, prior to the Distribution Date, the registered
holders of the Common Shares); and any registered holder of any Right
Certificate (or, prior to the Distribution Date, of the Common Shares),
without the consent of the Rights Agent or of the holder of any other Right
Certificate (or, prior to the Distribution Date, of the Common Shares), may,
in his own behalf and for his own benefit, enforce, and may institute and
maintain any suit, action or proceeding against the Corporation to enforce, or
otherwise act in respect of, his right to exercise the Rights evidenced by
such Right Certificate in the manner provided in such Right Certificate and in
this 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 will be entitled to specific performance of the obligations
under, and injunctive relief against actual or threatened violations of the
obligations of any Person subject to, this Agreement.
 
  Section 16. Agreement of Right Holders. Every holder of a Right, by
accepting the same, consents and agrees with the Corporation and the Rights
Agent and with every other holder of a Right that:
 
    (a) prior to the Distribution Date, the Rights will be transferable only
  in connection with the transfer of the Common Shares;
 
    (b) after the Distribution Date, the Right Certificates are transferable
  only on the registry books of the Rights Agent if surrendered at the
  principal office or offices of the Rights Agent designated for such
  purpose, duly endorsed or accompanied by a proper instrument of transfer
  and with the appropriate form fully executed;
 
    (c) subject to Section 6 and Section 7(f) hereof, the Corporation and the
  Rights Agent may deem and treat the person in whose name the Right
  Certificate (or, prior to the Distribution Date, the associated Common
  Shares certificate) is registered as the absolute owner thereof and of the
  Rights evidenced thereby (notwithstanding any notations of ownership or
  writing on the Right Certificate or the associated Common Shares
  certificate made by anyone other than the Corporation or the Rights Agent)
  for all purposes
 
                                     D-17
<PAGE>
 
  whatsoever, and neither the Corporation 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 Corporation nor the Rights Agent shall have any liability to any holder
  of a Right or a beneficial interest in 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 Corporation must use its best efforts to
  have any such order, decree or ruling lifted or otherwise overturned as
  soon as possible.
 
  Section 17. Right Certificate Holder Not Deemed a Stockholder. No holder, as
such, of any Right Certificate shall be entitled to vote, receive dividends or
be deemed for any purpose the holder of the Preferred Shares or any other
securities of the Corporation which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained
herein or in any Right Certificate be construed to confer upon the holder of
any Right Certificate, as such, any of the rights of a stockholder of the
Corporation 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 25
hereof), or to receive dividends or other distributions or to exercise any
preemptive or subscription rights, or otherwise, until the Right or Rights
evidenced by such Right Certificate shall have been exercised in accordance
with the provisions hereof.
 
  Section 18. Concerning the Rights Agent. The Corporation agrees to pay to
the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its
reasonable expenses and counsel fees and other disbursements incurred in the
administration and execution of this Agreement and the exercise and
performance of its duties hereunder. The Corporation also agrees to indemnify
the Rights Agent for, and to hold it harmless against, any loss, liability, or
expense, incurred without negligence, bad faith or willful misconduct on the
part of the Rights Agent, for anything done or omitted by the Rights Agent in
connection with the acceptance and administration of this Agreement, including
the costs and expenses of defending against any claim of liability in the
premises.
 
  The Rights Agent 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 Right Certificate or
certificate for Common Shares or for other securities of the Corporation,
instrument of assignment or transfer, power of attorney, endorsement,
affidavit, letter, notice, direction, consent, certificate, statement, or
other paper or document believed by it to be genuine and to be signed,
executed and, where necessary, verified or acknowledged, by the proper Person
or Persons.
 
  Section 19. Merger or Consolidation or Change of Name of Rights Agent. Any
corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the stock transfer or
all or substantially all of the corporate trust 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 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
Right 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 Right Certificates so countersigned; and in case at
that time any of the Right Certificates shall not have been countersigned, any
successor Rights Agent may countersign such Right Certificates either in the
name of the predecessor or in the name of the successor Rights Agent; and in
all such cases such Right Certificates shall have the full force provided in
the Right Certificates and in this Agreement.
 
                                     D-18
<PAGE>
 
  In case at any time the name of the Rights Agent shall be changed and at
such time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior
name and deliver Right Certificates so countersigned; and in case at that time
any of the Right Certificates shall not have been countersigned, the Rights
Agent may countersign such Right Certificates either in its prior name or in
its changed name; and in all such cases such Right Certificates shall have the
full force provided in the Right Certificates and in this 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 Corporation and the holders of Right
Certificates, by their acceptance thereof, shall be bound:
 
    (a) The Rights Agent may consult with legal counsel (who may be legal
  counsel for the Corporation), and the opinion of such counsel shall be full
  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 an Acquiring Person and the
  determination of the current market price of any Security) be proved or
  established by the Corporation prior to taking or suffering any action
  hereunder, such fact or matter (unless other evidence in respect thereof be
  herein specifically prescribed) may be deemed to be conclusively proved and
  established by a certificate signed by any one of the Chairman of the
  Board, the Chief Executive Officer, the President, any Vice President, the
  Treasurer or the Secretary of the Corporation 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 Right
  Certificates (except its countersignature on such Right Certificates) or be
  required to verify the same, but all such statements and recitals are and
  shall be deemed to have been made by the Corporation 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 Right Certificate (except its countersignature
  thereof); nor shall it be responsible for any breach by the Corporation 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 Right Certificates after
  receipt of the certificate described in Section 12 hereof); nor shall it by
  any act hereunder be deemed to make any representation or warranty as to
  the authorization or reservation of any Preferred Shares or Common Shares
  or other securities to be issued pursuant to this Agreement or any Right
  Certificate or as to whether any Preferred Shares or Common Shares or other
  securities will, when issued, be validly authorized and issued, fully paid
  and nonassessable.
 
    (f) The Corporation agrees that it will perform, execute, acknowledge and
  deliver or cause to be performed, executed, acknowledged and delivered all
  such further and other acts, instruments and assurances as may reasonably
  be required by the Rights Agent for the carrying out or performing by the
  Rights Agent of the provisions of this Agreement.
 
    (g) The Rights Agent is hereby authorized and directed to accept
  instructions with respect to the performance of its duties hereunder from
  any one of the Chairman of the Board, the Chief Executive Officer, the
  President, any Vice President, the Treasurer or the Secretary of the
  Corporation, and to apply to such officers for advice or instructions in
  connection with its duties, and shall not be liable for any action taken or
  suffered by it in good faith in accordance with instructions of any such
  officer. Any application by the Rights Agent for written instructions from
  the Corporation may, at the option of the Rights Agent, set forth
 
                                     D-19
<PAGE>
 
  in writing any action proposed to be taken or omitted by the Rights Agent
  under this Rights Agreement and the date on or after which such action
  shall be taken or such omission shall be effective. The Rights Agent shall
  not be liable for any action taken by, or omission of, the Rights Agent in
  accordance with a proposal included in any such application on or after the
  date specified in such application (which date shall not be less than five
  Business Days after the date any officer of the Corporation actually
  receives such application, unless any such officer shall have consented in
  writing to an earlier date) unless, prior to taking any such action (or the
  effective date in the case of an omission), the Rights Agent shall have
  received written instruction in response to such application specifying the
  action to be taken or omitted.
 
    (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 Corporation or become pecuniarily interested in any
  transaction in which the Corporation may be interested, or contract with or
  lend money to the Corporation 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
  Corporation 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 Corporation resulting
  from any such act, default, neglect or misconduct, provided 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.
 
    (k) If, with respect to any Rights 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 not
  been completed, the Rights Agent shall not take any further action with
  respect to such requested exercise of transfer without first consulting
  with the Corporation.
 
  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 Corporation and to each
transfer agent of the Preferred Shares or Common Shares by registered or
certified mail, and to the holders of the Right Certificates by first-class
mail. The Corporation may remove the Rights Agent or any successor Rights
Agent upon sixty (60) 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
Preferred Shares or Common Shares by registered or certified mail, and to
holders of the Right Certificates by first-class mail. If the Rights Agent
shall resign or be removed or shall otherwise become incapable of acting, the
Corporation shall appoint a successor to the Rights Agent. If the Corporation
shall fail to make such appointment within a period of sixty (60) days after
giving notice of such removal or after it has been notified in writing of such
resignation or incapacity by the resigning or incapacitated Rights Agent or by
the holder of a Right Certificate (who shall, with such notice, submit his
Right Certificate for inspection by the Corporation), then the registered
holder of any Right Certificate may apply to any court of competent
jurisdiction for the appointment of a new Rights Agent. Any successor Rights
Agent, whether appointed by the Corporation or by such a court, shall be a
corporation organized and doing business under the laws of the United States
or any state of the United States, in good standing, 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 such lower number as approved by the Corporation's
Board of Directors). After appointment, the successor Rights Agent shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver
any further assurance, conveyance, act or deed necessary for the purpose. Not
later than the effective date of any such appointment the Corporation shall
file notice thereof in
 
                                     D-20
<PAGE>
 
writing with the predecessor Rights Agent and each transfer agent of the
Preferred Shares or Common Shares and mail a notice thereof in writing to the
registered holders of the Right Certificates. Failure to give any notice
provided for in this Section 21, however, or any defect therein, 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 Right Certificates. Notwithstanding any of the
provisions of this Agreement or of the Rights to the contrary, the Corporation
may, at its option, issue new Right Certificates evidencing Rights in such
form as may be approved by its Board of Directors to reflect any adjustment or
change in the Purchase Price and the number or kind or class of shares or
other securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.
 
  In addition, in connection with the issuance or sale of Common Shares
following the Distribution Date and prior to the earliest of the Redemption
Date, the Final Expiration Date and the consummation of a transaction
contemplated by Section 13(d) hereof, the Corporation (a) shall with respect
to Common Shares so issued or sold pursuant to the exercise of stock options
or under any employee plan or arrangement, or upon the exercise, conversion or
exchange of securities, notes or debentures issued by the Corporation, and (b)
may, in any other case, if deemed necessary or appropriate by the Board of
Directors of the Corporation, issue Right Certificates representing the
appropriate number of Rights in connection with such issuance or sale;
provided, however, that no Right 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) (i) The Board of Directors of
the Corporation may, at its option, redeem all but not less than all the then
outstanding Rights at a redemption price of $0.01 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"), at any time prior to
the earlier of (x) the occurrence of a Section 11(a)(ii) Event, or (y) the
Final Expiration Date, and the Corporation may, at its option, pay the
Redemption Price either in Common Shares (based on the current per share
market price, as defined in Section 11(d) hereof, of the Common Shares at the
time of redemption) or cash; provided, however, that if the Corporation elects
to pay the Redemption Price in Common Shares, the Corporation shall not be
required to issue any fractional Common Shares and the number of Common Shares
issuable to each holder of Rights shall be rounded down to the next whole
share.
 
  (ii) In addition, the Board of Directors of the Corporation may, at its
option, at any time following a Shares Acquisition Date but prior to any
Section 13 Event, redeem all but not less than all of the then outstanding
Rights at the Redemption Price in connection with any Section 13 Event in
which all holders of Common Shares are treated alike and not involving (other
than as a holder of Common Shares being treated like all other such holders) a
Transaction Person.
 
  (b) In the case of a redemption permitted under Section 23(a)(i),
immediately upon the date for redemption set forth (or determined in the
manner specified in) in a resolution of the Board of Directors of the
Corporation 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. In the case of a redemption permitted
only under Section 23(a)(ii), evidence of which shall have been filed with the
Rights Agent, the right to exercise the Rights will terminate and represent
only the right to receive the Redemption Price upon the later of ten Business
Days following the giving of notice or the expiration of any period during
which the rights under Section 11(a)(ii) may be exercised. The Corporation
shall promptly give public notice of any such redemption; provided, however,
that the failure to give, or any defect in, any such notice shall not affect
the validity of such redemption. Within ten (10) days after such date for
redemption set forth in a resolution of the Board of Directors ordering the
redemption of the Rights, the Corporation shall mail a notice of redemption to
all the holders of the then outstanding Rights at their last addresses as they
appear upon the registry books of the Rights Agent or, prior to the
Distribution Date, on the registry books of the transfer
 
                                     D-21
<PAGE>
 
agent for the Common Shares. 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. Neither the Corporation nor any of its
Affiliates or Associates may redeem, acquire or purchase for value any Rights
at any time in any manner other than that specifically set forth in this
Section 23 and other than in connection with the purchase of Common Shares
prior to the Distribution Date.
 
  (c) In the case of a redemption permitted under Section 23(a)(i), the
Corporation may, at its option, discharge all of its obligations with respect
to the Rights by (i) issuing a press release announcing the manner of
redemption of the Rights in accordance with this Agreement and (ii) mailing
payment of the Redemption Price to the registered holders of the Rights at
their last addresses as they appear on the registry books of the Rights Agent
or, prior to the Distribution Date, on the registry books of the Transfer
Agent of the Common Shares, and upon such action, all outstanding Rights and
Right Certificates shall be null and void without any further action by the
Corporation.
 
  Section 24. Exchange. (a) The Board of Directors of the Corporation may, at
its option, at any time after the time that any Person becomes an Acquiring
Person, exchange all or part of the then outstanding and exercisable Rights
(which shall not include Rights that have become void pursuant to the
provisions of Section 7(e) and Section 11(a)(ii) hereof) for Common Shares of
the Corporation at an exchange ratio of one Common Share per Right,
appropriately adjusted to reflect any stock split, stock dividend or similar
transaction involving either the Common Shares or the Preferred Shares
occurring after the date hereof (such exchange ratio being hereinafter
referred to as the "Exchange Ratio"). Notwithstanding the foregoing, the Board
of Directors shall not be empowered to effect such exchange at any time after
any Person (other than the Corporation, any Subsidiary of the Corporation, any
employee benefit plan of the Corporation or any such Subsidiary, any entity
holding Common Shares for or pursuant to the terms of any such plan or any
trustee, administrator or fiduciary of such a plan), together with all
Affiliates and Associates of such Person, becomes the Beneficial Owner of 50%
or more of the Common Shares then outstanding.
 
  (b) Immediately upon the action of the Board of Directors of the Corporation
ordering the exchange of any Rights pursuant to subsection (a) of this Section
24 and without any further action and without any notice, the right to
exercise such rights shall terminate and the only right thereafter of a holder
of such Rights shall be to receive that number of Common Shares equal to the
number of such rights held by such holder multiplied by the Exchange Ratio.
The Corporation shall promptly give public notice of any such exchange;
provided, however, that the failure to give, or any defect in, such notice
shall not affect the validity of such exchange. The Corporation promptly shall
mail a notice of any such exchange to all of the holders of such Rights at
their last addresses as they appear upon the registry books of the Rights
Agent. Any notice which is mailed in the manner herein provided shall be
deemed given, whether or not the holder receives the notice. Each such notice
of exchange will state the method by which the exchange of the Common Shares
for Rights will be effected and, in the event of any partial exchange, the
number of Rights which will be exchanged. Any partial exchange shall be
effected pro rata based on the number of Rights (other than Rights which have
become void pursuant to the provisions of Section 7(e) and Section 11(a)(ii)
hereof) held by each holder of Rights.
 
  (c) In any exchange pursuant to this Section 24, the Corporation, at its
option, may substitute Preferred Shares (or equivalent preferred shares, as
such term is defined in Section 11(b) hereof) for some or all of the Common
Shares exchangeable for Rights, at the initial rate of one-hundredth of a
Preferred Share (or equivalent preferred share) for each Common Share, as
appropriately adjusted to reflect adjustments in the voting rights of the
Preferred Shares pursuant to the terms thereof, so that the fraction of a
Preferred Share delivered in lieu of each Common Share shall have the same
voting rights as one Common Share.
 
  (d) The Board of Directors of the Corporation shall not authorize any
exchange transaction referred to in Section 24(a) hereof unless at the time
such exchange is authorized there shall be sufficient Common Shares or
Preferred Shares issued but not outstanding or authorized but unissued to
permit the exchange of Rights as contemplated in accordance with this Section
24.
 
                                     D-22
<PAGE>
 
  Section 25. Notice of Certain Events. (a) In case the Corporation shall
propose (i) to pay any dividend payable in stock of any class to the holders
of its Preferred Shares or to make any other distribution to the holders of
its Preferred Shares (other than a regularly quarterly cash dividend), (ii) to
offer to the holders of its Preferred Shares rights or warrants to subscribe
for or to purchase any additional Preferred Shares or shares of stock of any
class or any other securities, rights or options, (iii) to effect any
reclassification of its Preferred Shares (other than a reclassification
involving only the subdivision of outstanding Preferred Shares), (iv) to
effect any consolidation or merger into or with any other Person (other than a
Subsidiary of the Corporation in a transaction which does not violate 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 or more
transactions, of 50% or more of the assets or earning power of the Corporation
and its Subsidiaries (taken as a whole) to any other Person or Persons (other
than the Corporation and/or any of its Subsidiaries in one or more
transactions each of which does not violate Section 11(o) hereof), or (v) to
effect the liquidation, dissolution or winding up of the Corporation, then, in
each such case, the Corporation shall give to each holder of a Right
Certificate, in accordance with Section 26 hereof, a notice of such proposed
action to the extent feasible and file a certificate with the Rights Agent to
that effect, which shall specify the record date for the purposes of such
stock dividend, or distribution of rights or warrants, or the date on which
such reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the Preferred Shares, 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 Preferred Shares 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 Preferred Shares, whichever shall be the
earlier.
 
  (b) In case of a Section 11(a)(ii) Event, then (i) the Corporation shall as
soon as practicable thereafter give to each holder of a Right Certificate, in
accordance with Section 26 hereof, a notice of the occurrence of such event,
which notice shall describe such event and the consequences of such event to
holders of Rights under Section 11(a)(ii) hereof and (ii) all references in
the preceding paragraph (a) to Preferred Shares shall be deemed thereafter to
refer also, if appropriate, to Common Shares and/or, if appropriate, other
securities of the Corporation.
 
  Section 26. Notices. Notices or demands authorized by this Agreement to be
given or made by the Rights Agent or by the holder of any Right Certificate to
or on the Corporation 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:
 
    ONEOK, Inc.
    100 West Fifth Street
    Tulsa, Oklahoma 74103
 
Subject to the provisions of Section 21 hereof, any notice or demand
authorized by this Agreement to be given or made by the Corporation or by the
holder of any Right 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 Corporation) as
follows:
 
    Liberty Bank and Trust Company of Oklahoma City, N.A.
    P.O. Box 25848
    Oklahoma City, Oklahoma 73125-0848
    Attention: John Brown
 
Notices or demands authorized by this Agreement to be given or made by the
Corporation or the Rights Agent to the holder of any Right Certificate or, if
prior to the Distribution Date, to the holder of certificates representing
Common Shares shall be sufficiently given or made if sent by first-class mail,
postage prepaid, addressed to such holder at the address of such holder as
shown on the registry books of the Corporation.
 
 
                                     D-23
<PAGE>
 
  Section 27. Supplements and Amendments. Prior to the Distribution Date, the
Corporation and the Rights Agent shall, if the Corporation so directs,
supplement or amend any provision of this Agreement without the approval of
any holders of certificates representing Common Shares. From and after the
Distribution Date, the Corporation and the Rights Agent shall, if the
Corporation so directs, supplement or amend this Agreement without the
approval of any holders of Right 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 Corporation may deem
necessary or desirable and which shall not adversely affect the interests of
the holders of Right Certificates (other than an Acquiring Person or an
Affiliate or Associate of an Acquiring Person); provided, however, that 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
Corporation which states that the proposed supplement or amendment is in
compliance with the terms of this Section 27, the Rights Agent shall execute
such supplement or amendment, provided that such supplement or amendment does
not adversely affect the rights or obligations of the Rights Agent under
Section 18 or Section 20 of this Agreement. Prior to the Distribution Date,
the interests of the holders of Rights shall be deemed coincident with the
interests of the holders of Common Shares.
 
  Section 28. Determination and Actions by the Board of Directors, etc. The
Board of Directors of the Corporation shall have the exclusive power and
authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board, or the Corporation, 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, without limitation, a
determination to redeem or not redeem the Rights or to amend the Agreement and
whether any proposed amendment adversely affects the interests of the holders
of Right Certificates). For all purposes of this Agreement, any calculation of
the number of Common Shares or other securities outstanding at any particular
time, including for purposes of determining the particular percentage of such
outstanding Common Shares or any other securities 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 as
in effect on the date of this 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
Corporation, the Rights Agent, the holders of the Right Certificates and all
other parties, and (y) not subject the Board to any liability to the holders
of the Right Certificates.
 
  Section 29. Successors. All the covenants and provisions of this Agreement
by or for the benefit of the Corporation or the Rights Agent shall bind and
inure to the benefit of their respective successors and assigns hereunder.
 
  Section 30. Benefits of this Agreement. Nothing in this Agreement shall be
construed to give to any person or corporation other than the Corporation, the
Rights Agent and the registered holders of the Right Certificates (and, prior
to the Distribution Date, the Common Shares) any legal or equitable right,
remedy or claim under this Agreement; but this Agreement shall be for the sole
and exclusive benefit of the Corporation, the Rights Agent and the registered
holders of the Right Certificates (and, prior to the Distribution Date, the
Common Shares).
 
  Section 31. 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.
 
 
                                     D-24
<PAGE>
 
  Section 32. Governing Law. This Agreement, each Right and each Right
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Oklahoma and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts to
be made and performed entirely within such State.
 
  Section 33. 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 34. 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.
 
                                     D-25
<PAGE>
 
  IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed and attested, all as of the date and year first above written.
 
                                          ONEOK, Inc.
 
                                          By: /s/ Jerry D. Neal
                                              _________________________________
                                            Name: Jerry D. Neal
                                            Title: Vice President

 
                                          Liberty Bank and Trust Company of
                                           Oklahoma City, N.A.
 
                                          By: /s/ Edith Schuler
                                              _________________________________
                                            Name: Edith Schuler
                                            Title: Assistant Vice President
 
                                      D-26
<PAGE>
 
                                                                      EXHIBIT A
 
                  CERTIFICATE OF DESIGNATION, PREFERENCES AND
                       RIGHTS OF SERIES C PARTICIPATING
                        PREFERRED STOCK OF ONEOK, INC.
 
   (PURSUANT TO SECTION 1032 OF THE GENERAL CORPORATION ACT OF THE STATE OF
                                   OKLAHOMA)
 
  We, Larry W. Brummett, Chairman, President, and Chief Executive Officer and
Deborah B. Barnes, Secretary of ONEOK, Inc. (the "Corporation"), a corporation
organized and existing under the General Corporation Act of the State of
Oklahoma, in accordance with the provisions of Section 1007 thereof, DO HEREBY
CERTIFY as follows:
 
  That pursuant to the authority conferred upon the Board of Directors by the
Certificate of Incorporation of the said Corporation, said Board of Directors
on November 26, 1997, voted to create a series of one million shares of
Preferred Stock designated as Series C Participating Preferred Stock:
 
  RESOLVED, that pursuant to the authority granted to and vested in the Board
of Directors of this Corporation in accordance with the provisions of the
Corporation's Certificate of Incorporation and Section 1032(g) of the General
Corporation Law of the State of Oklahoma, the Board of Directors hereby
creates a series of Preferred Stock of the Company and hereby states the
designation and number of shares, and fixes the relative rights, preferences
and limitations thereof (in addition to the provisions set forth in the
Corporation's Certificate of Incorporation which are applicable to the
Preferred Stock of all classes and series) as follows:
 
  Section 1. Designation and Amount. There shall be a series of Preferred
Stock, par value $0.01 per share, of the Corporation which shall be designated
as "Series C Participating Preferred Stock," par value $0.01 per share, and
the number of shares constituting such series shall be one million. Such
number of shares may be increased or decreased by resolution of the Board of
Directors or by resolution of the Executive Committee of the Board of
Directors; provided, that no decrease shall reduce the number of shares of
Series C Participating Preferred Stock to a number less than that of the
shares then outstanding plus the number of shares issuable upon exercise of
outstanding rights, options or warrants or upon conversion of outstanding
securities issued by the Corporation.
 
  Section 2. Dividends and Distributions.
 
  (A) Subject to the prior and superior rights of the holders of any shares of
any series of Preferred Stock and Preferred Stock ranking prior and superior
to the Series C Participating Preferred Stock with respect to dividends, the
holders of shares of Series C Participating Preferred Stock in preference to
the holders of shares of Common Stock, par value $0.01 per share (the "Common
Stock"), of the Corporation and any other junior stock, shall be entitled to
receive, when, as and if declared by the Board of Directors out of funds
legally available for the purpose, quarterly dividends payable in cash on the
last day of each fiscal quarter of the Corporation in each year or such other
dates as the Board of Directors of the Corporation shall approve (each such
date being referred to herein as a "Quarterly Dividend Payment Date"),
commencing on the first Quarterly Dividend Payment Date after the first
issuance of a share or fraction of a share of Series C Participating Preferred
Stock in an amount per share (rounded to the nearest cent) equal to the
greater of (a) $1.00 or (b) subject to the provision for adjustment
hereinafter set forth, 100 times the aggregate per share amount of all cash
dividends, and 100 times the aggregate per share amount (payable in kind) of
all non-cash dividends or other distributions other than a dividend payable in
shares of Common Stock or a subdivision of the outstanding shares of Common
Stock (by reclassification or otherwise), declared on the Common Stock since
the immediately preceding Quarterly Dividend Payment Date, or, with respect to
the first Quarterly Dividend Payment Date, since the first issuance of any
share or fraction of a share of Series C Participating Preferred Stock. In the
event the Corporation shall at any time after November 26, 1997 (the "Rights
Declaration Date") (i) declare any dividend on Common Stock payable in shares
of Common Stock, (ii) subdivide (by a stock split or otherwise) the
outstanding
 
                                     D-27
<PAGE>
 
Common Stock, or (iii) combine (by a reverse stock split or otherwise) the
outstanding Common Stock into a smaller number of shares, then in each such
case the amount to which holders of shares of Series C 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 C
Participating Preferred Stock as provided in paragraph (A) above at the time
it declares a dividend or distribution on the Common Stock (other than a
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 $1.00 per share on the Series C
Participating Preferred Stock shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date.
 
  (C) So long as any shares of the Series C Participating Preferred Stock are
outstanding, no dividends or other distributions shall be declared, paid or
distributed, or set aside for payment or distribution, on the Common Stock
unless, in each case, the dividend required by this Section 2 to be declared
on the Series C Participating Preferred Stock shall have been declared.
 
  (D) The holders of the shares of the Series C Participating Preferred Stock
shall not be entitled to receive any dividends or other distributions except
as provided herein.
 
  (E) Dividends shall begin to accrue and be cumulative on outstanding shares
of Series C Participating Preferred Stock from the Quarterly Dividend Payment
Date next preceding the date of issue of such shares of Series C 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 C
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 C Participating Preferred Stock in an amount less
than the total 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 C Participating Preferred
Stock entitled to receive payment of a dividend or distribution declared
thereon, which record date shall be no more than sixty (60) days prior to the
date fixed for the payment thereof.
 
  Section 3. Voting Rights. The holders of shares of Series C Participating
Preferred Stock shall have the following voting rights:
 
  (A) Subject to the provision for adjustment hereinafter set forth, each
share of Series C Participating Preferred Stock shall entitle the holder
thereof to 100 votes 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 (by a stock split or otherwise) the
outstanding Common Stock, or (iii) combine (by a reverse stock split or
otherwise) 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 C Participating Preferred Stock were entitled immediately prior to such
event shall be adjusted by multiplying such number 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.
 
                                     D-28
<PAGE>
 
  (B) Except as otherwise provided herein or by law, the holders of shares of
Series C 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 C Participating Preferred
Stock shall be in arrears in an amount equal to at least six (6) full
quarterly dividends (whether or not declared and whether or not consecutive)
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
C Participating Preferred Stock then outstanding shall have been declared and
paid or set apart for payment. During each default period, all holders of
Preferred Stock (including holders of the Series C Participating Preferred
Stock) with dividends in arrears in an amount equal to at least six (6) full
quarterly dividends (whether or not declared and whether or not consecutive)
thereon, voting as a class, irrespective of series, shall have the right to
elect two (2) Directors.
 
  (ii) During any default period, such voting right of the holders of Series C
Participating Preferred Stock may be exercised initially at a special meeting
called pursuant to subparagraph (C)(iii) of this Section 3 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 or Preferred Stock, if any, to increase, in
certain cases, the authorized number of Directors shall be exercised unless
the holders of one-third (1/3) in number of shares of 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
Preferred Stock of such voting right. At any meeting at which the holders of
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
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 Preferred Stock shall have exercised their
right to elect Directors in any 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 Preferred Stock as herein provided or
pursuant to the rights of any equity securities ranking senior to or pari
passu with the Series C Participating Preferred Stock.
 
  (iii) Unless the holders of 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 Preferred
Stock outstanding, irrespective of series, may request, the calling of a
special meeting of the holders of Preferred Stock, which meeting shall
thereupon be called by the Chairman of the Board or the President of the
Corporation. Notice of such meeting and of any annual meeting at which holders
of Preferred Stock are entitled to vote pursuant to this subparagraph (C)(iii)
of Section 3 shall be given to each holder of record of Preferred Stock by
mailing a copy of such notice to him at his last address as the same appears
on the books of the Corporation. Such meeting shall be called for a time not
earlier than ten (10) days and not later than sixty (60) days after such order
or request, or in default of the calling of such meeting within sixty (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 Preferred Stock outstanding.
Notwithstanding the provisions of this subparagraph (C)(iii) of Section 3, no
such special meeting shall be called during the period within sixty (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 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
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
 
                                     D-29
<PAGE>
 
Board of Directors may (except as provided in subparagraph (C)(ii) of this
Section 3) be filled by a 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 become vacant. References in this paragraph (C) to
Directors elected by the holders of a particular class of stock shall include
Directors 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 Preferred Stock as a class to elect Directors shall cease, (y)
the term of any Directors elected by the holders of Preferred Stock as a class
shall terminate, and (z) the number of Directors shall be such number as may
be provided for in the Corporation's Certificate of Incorporation or By-laws
irrespective of any increase made pursuant to the provisions of subparagraph
(C)(ii) of this Section 3 (such number being subject, however, to change
thereafter in any manner provided by law or in the Corporation's 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 C 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 C 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 C 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 C 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 C Participating
  Preferred Stock except dividends paid ratably on the Series C Participating
  Preferred Stock and all such parity stock on which dividends are payable or
  in arrears in proportion to the total amounts to which the holders of all
  such shares are then entitled;
 
    (iii) Redeem or purchase or otherwise acquire for consideration shares of
  any stock ranking on a parity (either as to dividends or upon liquidation,
  dissolution or winding up) with the Series C Participating Preferred Stock;
  provided, however, 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 C Participating
  Preferred Stock; or
 
    (iv) Purchase or otherwise acquire for consideration any shares of Series
  C Participating Preferred Stock or any shares of stock ranking on a parity
  with the Series C 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.
 
                                     D-30
<PAGE>
 
  Section 5. Reacquired Shares. Any shares of Series C Participating Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and canceled 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) Upon any liquidation (voluntary or otherwise), dissolution or winding up
of the Corporation, no distribution shall be made to the holders of shares of
stock ranking junior (either as to dividends or upon liquidation, dissolution
or winding up) to the Series C Participating Preferred Stock unless, prior
thereto, the holders of shares of Series C Participating Preferred Stock shall
have received per share, the amount of $1.00, plus an amount equal to accrued
and unpaid dividends and distributions thereon, whether or not declared, to
the date of such payment (the "Series C Liquidation Preference"). Following
the payment of the full amount of the Series C Liquidation Preference, no
additional distributions shall be made to the holders of shares of Series C
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 C Liquidation
Preference by (ii) 100 (as appropriately adjusted as set forth in paragraph
(C) of this Section 6 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 C Liquidation Preference and the Common Adjustment in
respect of all outstanding shares of Series C Participating Preferred Stock
and Common Stock, respectively, holders of Series C 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 there are not sufficient assets available to permit payment
in full of the Series C Liquidation Preference and the liquidation preferences
of all other series of Preferred Stock, if any, which rank on a parity with
the Series C 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 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
case the Adjustment Number in effect immediately prior to such event shall be
adjusted by multiplying such Adjustment Number 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 7. Consolidation, Merger, etc. If 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 event the shares
of Series C 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 the Adjustment Number 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.
 
  Section 8. No Redemption. The shares of Series C Participating Preferred
Stock shall not be redeemable.
 
  Section 9. Ranking. The Series C Participating Preferred Stock shall rank
junior to all other series of the Corporation's Preferred Stock as to the
payment of dividends and the distribution of assets, unless the terms of any
such series shall provide otherwise.
 
                                     D-31
<PAGE>
 
  Section 10. Fractional Shares. The Series C Participating Preferred Stock
may be issued in fractions of a share which shall entitle the holder, in
proportion to such holder's fractional shares, to exercise voting rights,
receive dividends, participate in distributions and to have the benefit of all
other rights of holders of Series C Participating Preferred Stock.
 
  Section 11. Amendment. The 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 C 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 C
Participating Preferred Stock, voting separately as a class.
 
  Section 12. Effective Date. This Certificate of Designation, Preferences and
Rights of Series C Participating Preferred Stock of ONEOK, Inc. shall be
effective at 5:00 P.M., Eastern Standard Time, on      , 1997.
 
  IN WITNESS WHEREOF, I have executed and subscribed this Certificate and do
affirm the foregoing as true under penalties of perjury this     day of    ,
1997.
 
                                          By: _________________________________
                                             Name:
                                             Title:
 
Attest:
 
_____________________________________
Name:
Title:  Secretary
 
                                     D-32
<PAGE>
 
                                                                      EXHIBIT B
 
                           FORM OF RIGHT CERTIFICATE
 
Certificate No. R-                                                       Rights
 
    NOT EXERCISABLE AFTER NOVEMBER 26, 2007, OR EARLIER IF REDEEMED BY THE
  CORPORATION. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT ON THE
  TERMS SET FORTH IN THE RIGHTS AGREEMENT.
 
    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 AN AFFILIATE OR ASSOCIATE THEREOF (AS DEFINED IN THE RIGHTS
  AGREEMENT) AND CERTAIN RELATED PERSONS, WHETHER CURRENTLY HELD BY OR ON
  BEHALF OF SUCH PERSON OR BY ANY SUBSEQUENT HOLDER, SHALL BECOME NULL AND
  VOID.
 
                               RIGHT CERTIFICATE
 
                                  ONEOK, INC.
 
  This certifies that    , or registered assigns, is the registered owner of
the number of Rights set forth above, each of which entitles the owner
thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of November 26, 1997 (the "Rights Agreement"), between
ONEOK, Inc., an Oklahoma corporation (the "Corporation"), and Liberty Bank and
Trust Company of Oklahoma City, N.A. (the "Rights Agent"), to purchase from
the Corporation at any time after the Distribution Date (as such term is
defined in the Rights Agreement) and prior to 5:00 P.M., New York City time,
on November 26, 2007, unless the Rights evidenced hereby shall have been
previously redeemed by the Corporation, at the principal office or offices of
the Rights Agent designated for such purpose, or at the office of its
successor as Rights Agent, one one-hundredth of a fully paid non-assessable
share of Series C Participating Preferred Stock, par value $0.01 per share
(the "Preferred Shares"), of the Corporation, at a purchase price of $80.00
per one one-hundredth of a Preferred Share (the "Purchase Price"), upon
presentation and surrender of this Right Certificate with the Form of Election
to Purchase duly executed. The number of Rights evidenced by this Right
Certificate (and the number of one one-hundredths of a Preferred Share which
may be purchased upon exercise hereof) set forth above, and the Purchase Price
set forth above, are the number and Purchase Price as of       , 1997 based on
the Preferred Shares as constituted at such date.
 
  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 Right 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 who
becomes a transferee after the Acquiring Person becomes such, or (iii) under
certain circumstances specified in the Rights Agreement, a transferee of any
such Acquiring Person, Associate or Affiliate who becomes a transferee prior
to or concurrently with the Acquiring Person becoming such, 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 of
one one-hundredths of a Preferred Share or other securities which may be
purchased upon the exercise of the Rights evidenced by this Right Certificate
are subject to modification and adjustment upon the happening of certain
events, including Triggering Events (as such term is defined in the Rights
Agreement).
 
  This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the
rights, limitations of rights,
 
                                     D-33
<PAGE>
 
obligations, duties and immunities hereunder of the Rights Agent, the
Corporation and the holders of the Right 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 Agreement are on file at the principal executive offices of the
Corporation and the principal office or offices of the Rights Agent.
 
  This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares or other securities as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder
to purchase. If this Right Certificate shall be exercised in part, the holder
shall be entitled to receive upon surrender hereof another Right Certificate
or Right Certificates for the number of whole Rights not exercised.
 
  Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate may be redeemed by the Corporation at a redemption price of
$.01 per Right (subject to adjustment as provided in the Rights Agreement)
payable in Common Shares or cash.
 
  The Corporation shall not be required to issue fractions of Rights or to
distribute Right Certificates which evidence fractional Rights. In lieu of
such fractional Rights, there shall be paid to the registered holders of the
Right Certificates with regard to which such fractional Rights would otherwise
be issuable, an amount in cash equal to the same fraction of the current
market value of a whole Right as defined in the Rights Agreement.
 
  The Corporation will not be required to issue fractions of Preferred Shares
(other than fractions which are one one-hundredths or integral multiples of
one one-hundredth of a Preferred Share) upon exercise of the Rights or to
distribute certificates which evidence fractional Preferred Shares (other than
fractions which are one one-hundredths or integral multiples of one one-
hundredth of a Preferred Share). In lieu of fractional Preferred Shares other
than fractions that are multiples of one one-hundredth of a Share, the
Corporation will pay to the registered holders of Right Certificates at the
time such Rights are exercised an amount in cash equal to the same fraction of
the current market value of one Preferred Share as defined in the Rights
Agreement.
 
  No holder of this Right Certificate shall be entitled to vote or receive
dividends or be deemed for any purpose the holder of the Preferred Shares or
of any other securities of the Corporation 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 Corporation 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 other
distributions or to exercise any preemptive or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Rights Agreement.
 
  This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.
 
                                     D-34
<PAGE>
 
  WITNESS the signature of the proper officers of the Corporation and its
corporate seal. Dated as of       , 1997.
 
[SEAL]
ATTEST:                                   ONEOK, Inc.
 
Attest:
 
By __________________________________     By __________________________________
  Name:                                     Name:
  Title:                                    Title:
 
Countersigned:
 
[RIGHTS AGENT]
 
 
 
By __________________________________
  Authorized Signatory
  Name:
  Title:
 
                                      D-35
<PAGE>
 
                   FORM OF REVERSE SIDE OF RIGHT CERTIFICATE
 
                              FORM OF ASSIGNMENT
 
               (To be executed by the registered holder if such
              holder desires to transfer the Right Certificate.)
 
FOR VALUE RECEIVED ____________________________________________________________
hereby sells, assigns and transfers unto ______________________________________
_______________________________________________________________________________
                 (Please print name and address of transferee)
_______________________________________________________________________________
this Right Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint        Attorney, to
transfer the within Right Certificate on the books of the within-named
Corporation, with full power of substitution.
 
Dated:    ,
 
                                          _____________________________________
                                          Signature
 
Signature Guaranteed:
 
  Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank, savings association, credit union or
trust company having an office or correspondent in the United States or other
eligible guarantor institution which is a participant in a signature guarantee
medallion program.
 
- -------------------------------------------------------------------------------
 
  The undersigned hereby certifies that (1) the Rights evidenced by this Right
Certificate are not being sold, assigned or transferred by or on behalf of a
Person who is or was an Acquiring Person or an Affiliate or Associate thereof
(as such terms are defined in the Rights Agreement) and (2) after due inquiry
and to the best knowledge of the undersigned, the undersigned did not acquire
the Rights evidenced by this Right Certificate from any Person who is or was
an Acquiring Person or an Affiliate or Associate thereof (as such terms are
defined in the Rights Agreement).
 
                                          _____________________________________
                                          Signature
 
 
 
                                     D-36
<PAGE>
 
             FORM OF REVERSE SIDE OF RIGHT CERTIFICATE--CONTINUED
 
                         FORM OF ELECTION TO PURCHASE
 
                   (To be executed by the registered holder
                   if such holder desires to exercise Rights
                    represented by the Right Certificate.)
 
To the Rights Agent:
 
  The undersigned hereby irrevocably elects to exercise Rights represented by
this Right Certificate to purchase the Preferred Shares, Common Shares or such
other securities issuable upon the exercise of such Rights at this time as
follows:
 
                                 Please Insert
                                 Number of Rights To Be Exercised
 
     (i)    Preferred Shares Exercise
                                 __________
 
     (ii)   Section 11(a)(ii) Exercise
                                 __________
 
     (iii)  Section 13 Exercise  __________
 
  The undersigned requests that certificates for such Preferred Shares, Common
Shares or other securities be issued in the name of:
 
Please insert social security
or other identifying number ___________________________________________________
- -------------------------------------------------------------------------------
                 (Please print name and address of transferee)
- -------------------------------------------------------------------------------
 
If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:
 
Please insert social security
or other identifying number ___________________________________________________
- -------------------------------------------------------------------------------
                 (Please print name and address of transferee)
- -------------------------------------------------------------------------------
 
Dated:    , 19
 
                                          _____________________________________
                                          Signature
 
Signature Guaranteed:
 
  Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank, savings association, credit union or
trust company having an office or correspondent in the United States or other
eligible guarantor institution which is a participant in a signature guarantee
medallion program.
 
 
                                     D-37
<PAGE>
 
  The undersigned hereby certifies that (1) the Rights evidenced by this Right
Certificate are not being exercised by or on behalf of a Person who is or was
an Acquiring Person or an Affiliate or Associate thereof (as such terms are
defined in the Rights Agreement) and (2) after due inquiry and to the best
knowledge of the undersigned, the undersigned did not acquire the Rights
evidenced by this Rights Certificate from any Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are
defined in the Rights Agreement).
 
                                          _____________________________________
                                          Signature
 
- -------------------------------------------------------------------------------
 
                                    NOTICE
 
  The signature on the foregoing Forms of Assignment and Election and
certificates must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any
change whatsoever.
 
  In the event the certification set forth above in the Form of Assignment or
the Form of Election to Purchase, as the case may be, is not completed, the
Corporation and the Rights Agent will deem the Beneficial Owner of the Rights
evidenced by this Right Certificate to be an Acquiring Person or an Affiliate
or Associate thereof (as such terms are defined in the Rights Agreement) and
such Assignment or Election to Purchase will not be honored.
 
                                     D-38
<PAGE>
 
                                                                      EXHIBIT C
 
                SUMMARY OF RIGHTS TO PURCHASE PREFERRED SHARES
 
  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 AN
AFFILIATE OR ASSOCIATE THEREOF (AS DEFINED IN THE RIGHTS AGREEMENT) AND
CERTAIN RELATED PERSONS, WHETHER CURRENTLY HELD BY OR ON BEHALF OF SUCH PERSON
OR BY ANY SUBSEQUENT HOLDER, SHALL BECOME NULL AND VOID.
 
  On November 26, 1997, the Board of Directors of ONEOK, Inc., an Oklahoma
corporation (the "Corporation"), declared a dividend distribution of one
preferred share purchase right (a "Right") for each outstanding share of
Common Stock, par value $0.01 per share (the "Common Shares"), of the
Corporation. The dividend is payable to the stockholders of record as of 5:00
P.M., Eastern Standard Time, on November 26, 1997 (the "Record Date"), and
with respect to Common Shares issued thereafter until the Distribution Date
(as defined below) and, in certain circumstances, with respect to Common
Shares issued after the Distribution Date. Except as set forth below, each
Right, when it becomes exercisable, entitles the registered holder to purchase
from the Corporation one one-hundredth of a share of Series C Participating
Preferred Stock, par value $0.01 per share (the "Preferred Shares") at a price
of $80.00 per one one-hundredth of a Preferred Share (the "Purchase Price"),
subject to adjustment. The description and terms of the Rights are set forth
in a Rights Agreement, dated as of November 26, 1997 (the "Rights Agreement"),
between the Corporation and Liberty Bank and Trust Company of Oklahoma City,
N.A. (the "Rights Agent").
 
  Initially, the Rights will be attached to all certificates representing
Common Shares then outstanding, and no separate Right Certificates (as
hereinafter defined) will be distributed. The Rights will separate from the
Common Shares on the earliest to occur of (i) the first date of public
announcement that a person or "group" has acquired beneficial ownership of 15%
or more of the outstanding Common Shares (except pursuant to a Permitted
Offer, as hereinafter defined); or (ii) 10 business days (or such later date
as the Board may determine) following the commencement of, or announcement of
an intention to commence, a tender offer or exchange offer the consummation of
which would result in a person or group becoming an Acquiring Person (as
hereinafter defined) (the earliest of such dates being called the
"Distribution Date"). A person or group whose acquisition of Common Shares
causes a Distribution Date pursuant to clause (i) above is an "Acquiring
Person." The first date of public announcement that a person or group has
become an Acquiring Person is the "Shares Acquisition Date." "Disinterested
Directors" are directors who are not officers of the Corporation and who are
not Acquiring Persons or their affiliates, associates or representatives of
any of them, or any Person who directly or indirectly proposed or nominated as
a director of the Corporation by a Transaction Person (as defined below).
 
  Notwithstanding the foregoing, an Acquiring Person does not include (i) any
member of the Shareholder Group, but only to the extent of Common Shares held
or acquired by such Shareholder Group member in accordance with the terms of
the Shareholder Agreement (as defined in the Agreement between WAI, Inc.,
Western Resources, Inc. and ONEOK Inc., dated December 12, 1996, as restated
and amended, dated May 19, 1997), and provided that the exemption provided
under this clause (i) shall permanently expire at such time as the Total
Ownership Percentage of Western Resources, Inc. and its affiliates first falls
below 10% or (ii) any Transferee who acquires Beneficial Ownership of Common
Share from the Shareholder Group pursuant to Sections 3.4(a) or 3.4(b) of the
Shareholder Agreement or who acquires Beneficial Ownership of less than 5% of
the Common Share in a public offering pursuant to Section 3.4(c) of the
Shareholder Agreement, but only to the extent of Common Shares acquired in
accordance with the terms of the Shareholder Agreement (it being understood
that, any such Transferee shall become an Acquiring Person upon the concurrent
or subsequent acquisition by such Transferee, or its Affiliates or Associates,
of any additional Common Shares if, after giving effect to such acquisition,
and taking into account all shares Beneficially Owned by the Transferee
including the shares acquired from the Shareholder Group, such Transferee
would be an Acquiring Person but for the provisions of this clause (ii))
(Defined terms used in clauses (i) and (ii) above which are defined in the
Shareholder Agreement shall have the same respective meanings as such terms
have in the Shareholder Agreement).
 
                                     D-39
<PAGE>
 
  The Rights Agreement provides that, until the Distribution Date, the Rights
will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights) new
Common Share certificates issued after the Record Date upon transfer or new
issuance of Common Shares will contain a notation incorporating the Rights
Agreement by reference. Until the Distribution Date (or earlier redemption or
expiration of the Rights), the surrender for transfer of any certificates for
Common Shares outstanding as of the Record Date, even without such notation or
a copy of this Summary of Rights being attached thereto, will also constitute
the transfer of the Rights associated with the Common Shares represented by
such certificate. As soon as practicable following the Distribution Date,
separate certificates evidencing the Rights ("Right Certificates") will be
mailed to holders of record of the Common Shares as of the close of business
on the Distribution Date (and to each initial record holder of certain Common
Shares issued after the Distribution Date), and such separate Right
Certificates alone will evidence the Rights.
 
  The Rights are not exercisable until the Distribution Date and will expire
at 5:00 P.M., New York City time, on November 26, 2007, unless earlier
redeemed by the Corporation as described below.
 
  In the event that any person becomes an Acquiring Person (except pursuant to
a Permitted Offer as defined below), each holder of a Right will have (subject
to the terms of the Rights Agreement) the right (the "Flip-In Right") to
receive upon exercise the number of Common Shares, or, in the discretion of
the Board of Directors, of one one-hundredth of a Preferred Share (or, in
certain circumstances, other securities of the Corporation) having a value
(immediately prior to such triggering event) equal to two times the exercise
price of the Right. Notwithstanding the foregoing, following the occurrence of
the event described above, all Rights that are, or (under certain
circumstances specified in the Rights Agreement) were, beneficially owned by
any Acquiring Person or any affiliate or associate thereof will be null and
void. A "Permitted Offer" is a tender or exchange offer for all outstanding
Common Shares which is at a price and on terms determined, prior to the
purchase of shares under such tender or exchange offer, by a Majority of
Disinterested Directors to be adequate (taking into account all factors that
such Disinterested Directors deem relevant) and otherwise in the best
interests of the Corporation, its stockholders and its other relevant
constituencies (other than the person or any affiliate or associate thereof on
whose basis the offer is being made) taking into account all factors that such
directors may deem relevant and (ii) any tender or exchange offer required or
permitted to be made by the Shareholder Group (as defined in the Shareholder
Agreement) pursuant to, and in accordance with, the Shareholder Agreement).
 
  In the event that, at any time following the Shares Acquisition Date, (i)
the Corporation is acquired in a merger or other business combination
transaction in which the holders of all of the outstanding Common Shares
immediately prior to the consummation of the transaction are not the holders
of all of the surviving corporation's voting power, or (ii) more than 50% of
the Corporation's assets or earning power is sold or transferred, in either
case with or to an Acquiring Person or any affiliate or associate or any other
person in which such Acquiring Person, affiliate or associate has an interest
or any person acting on behalf of or in concert with such Acquiring Person,
affiliate or associate, or, if in such transaction all holders of Common
Shares are not treated alike, any other person, then each holder of a Right
(except Rights which previously have been voided as set forth above) shall
thereafter have the right (the "Flip-Over Right") to receive, upon exercise,
common shares of the acquiring company having a value equal to two times the
exercise price of the Right.
 
  The Purchase Price payable, and the number of one-hundredths of a Preferred
Share or other securities issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the
Preferred Shares, (ii) upon the grant to holders of the Preferred Shares of
certain rights or warrants to subscribe for or purchase Preferred Shares at a
price, or securities convertible into Preferred Shares with a conversion
price, less than the then current market price of the Preferred Shares or
(iii) upon the distribution to holders of the Preferred Shares of evidences of
indebtedness or assets (excluding regular quarterly cash dividends) or of
subscription rights or warrants (other than those referred to above).
 
  The Purchase Price is also subject to adjustment in the event of a stock
split of the Common Shares or a stock dividend on the Common Shares payable in
Common Shares or subdivisions, consolidations or combinations of the Common
Shares occurring, in any such case, prior to the Distribution Date.
 
                                     D-40
<PAGE>
 
  With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional one-hundredths of a Preferred Share will be
issued and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day price to the date
of exercise.
 
  Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $1.00 per share but, if greater, will be
entitled to an aggregate dividend per share of 100 times the dividend declared
per Common Share. In the event of liquidation, the holders of the Preferred
Shares will be entitled to a minimum preferential liquidation payment of $1.00
per share; thereafter, and after the holders of the Common Shares receive a
liquidation payment of $0.01 per share, the holders of the Preferred Shares
and the holders of the Common Shares will share the remaining assets in the
ratio of one hundred to 1 (as adjusted) for each Preferred Share and Common
Share so held, respectively. Finally, in the event of any merger,
consolidation or other transaction in which Common Shares are exchanged, each
Preferred Share will be entitled to receive one hundred times the amount
received per Common Share. These rights are protected by customary
antidilution provisions. In the event that the amount of accrued and unpaid
dividends on the Preferred Shares is equivalent to at least six full quarterly
dividends, the holders of the Preferred Shares shall have the right, voting as
a class, to elect two directors in addition to the directors elected by the
holders of the Common Shares until all cumulative dividends on the Preferred
Shares have been paid through the last quarterly dividend payment date or
until non-cumulative dividends have been paid regularly for at least one year.
 
  At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, the Corporation may
redeem the rights in whole, but not in part, at a price of $0.01 per Right
(the "Redemption Price"), which redemption shall be effective upon the action
of the Board of Directors. Additionally, the Corporation may redeem the then
outstanding Rights in whole but not in part, at the Redemption Price after the
triggering of the Flip-in Right and before the expiration of any period during
which the Flip-in Right may be exercised in connection with a merger or other
business combination transaction or series of transactions involving the
Corporation in which all holders of Common Shares are treated alike but not
involving a Transaction Person (as defined below). Upon the effective date of
the redemption of the Rights, the right to exercise the Rights will terminate
and the only right of the holders of Rights will be to receive the Redemption
Price.
 
  Until a Right is exercised, the holder thereof, as such, will have no rights
as a stockholder of the Corporation, including, without limitation, the right
to vote or to receive dividends. While the distribution of the Rights will not
be taxable to stockholders of the Corporation, stockholders may, depending
upon the circumstances, recognize taxable income should the Rights become
exercisable or upon the occurrence of certain events thereafter.
 
 
                                     D-41


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission