OTTER TAIL POWER CO
8-A12G, 1997-01-28
ELECTRIC SERVICES
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<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


                           OTTER TAIL POWER COMPANY
             (Exact name of registrant as specified in its charter)

                MINNESOTA                                       41-0462685    
         (State of incorporation                             (I.R.S. Employer   
             or organization)                               Identification No.) 
                                                                                
                                                                                
             P. O. BOX 496                                                      
        215 SOUTH CASCADE STREET                                                
         FERGUS FALLS, MINNESOTA                                56538-0496      
(Address of principal executive offices)                        (Zip Code)      


If this Form relates to the registration of a class of debt securities and is
effective upon filing pursuant to General Instruction A.(c)(1), please check the
following box.  [_]

If this Form relates to the registration of a class of debt securities and is to
become effective simultaneously with the effectiveness of a concurrent
registration statement under the Securities Act of 1933 pursuant to General
Instruction A.(c)(2), please check the following box.  [_]


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

                                     None
                               (Title of class)


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

                        PREFERRED SHARE PURCHASE RIGHTS
                               (Title of class)
<PAGE>
 
ITEM 1.   DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED

          On January 27, 1997, the Board of Directors of Otter Tail Power
Company (the "Company"), declared a dividend of one preferred share purchase
right (a "Right") per share for each outstanding share of Common Stock, par
value $5.00 (the "Common Shares"), of the Company.  The dividend is payable on
February 7, 1997 (the "Record Date") to shareholders of record on that date.

          Each Right entitles the registered holder to purchase from the Company
one one-hundredth of a share of Series A Junior Participating Preferred Stock,
without par value (the "Preferred Shares"), of the Company at a price of $70.00
per one-hundredth of a Preferred Share (the "Purchase Price"), subject to
adjustment.  The description and terms of the Rights are set forth in a Rights
Agreement (the "Rights Agreement"), dated as of January 27, 1997, between the
Company and Norwest Bank Minnesota, National Association, as Rights Agent (the
"Rights Agent").

          Initially, the Rights will be evidenced by the certificates
representing Common Shares then outstanding and no separate Right Certificates
will be distributed.  The Rights will separate from the Common Shares, and a
Distribution Date for the Rights will occur upon the earlier of:  (i) the first
date of public announcement that a Person or group of affiliated or associated
Persons has become an "Acquiring Person" (i.e., has become, subject to certain
exceptions, the beneficial owner of 15% or more of the outstanding Common
Shares) (except pursuant to a Permitted Offer, as hereinafter defined) and (ii)
the 10th day following the commencement or public announcement of a tender offer
or exchange offer, the consummation of which would result in a Person or group
of affiliated or associated Persons becoming, subject to certain exceptions, the
beneficial owner of 15% or more of the outstanding Common Shares (or such later
date as may be determined by the Board of Directors of the Company prior to a
Person or group of affiliated or associated Persons becoming an Acquiring
Person) (the earlier of such dates being called the "Distribution Date").

          Until the Distribution Date, (i) the Rights will be evidenced by the
Common Share certificates and will be transferred with and only with the Common
Shares, (ii) new Common Share certificates issued after the Record Date upon
transfer or new issuance of the Common Shares will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any Common Share certificate, even without such notation or a copy
of the Summary of Rights attached thereto, will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate.

          As promptly as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Shares as of the close of business on the
Distribution Date, and such separate Right Certificates alone will evidence the
Rights.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on January 27, 2007, unless extended or earlier redeemed or
exchanged by the Company as described below.

          The Purchase Price payable and the number of Preferred Shares or other
securities or property issuable upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution: (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain
rights, options or warrants to subscribe for or purchase Preferred Shares or
convertible securities at less than the then current market price of the
Preferred Shares, or (iii) upon the distribution to holders of the Preferred
Shares of evidences of indebtedness or assets (excluding regular periodic cash
dividends or dividends payable in Preferred Shares) or of subscription rights or
warrants (other than those described in clause (ii) of this paragraph).  With
certain exceptions, no adjustment in the Purchase Price will be required until
cumulative adjustments require an adjustment of at least 1% in the Purchase
Price.

                                      -2-
<PAGE>
 
          No fraction of a Preferred Share (other than fractions in integral
multiples of one one-hundredth of a share) will be issued and, in lieu thereof,
an adjustment in cash will be made based on the closing price on the last
trading date prior to the date of exercise.

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

          Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $.01 per share but will be entitled to an
aggregate dividend of 100 times the dividend declared per Common Share. In the
event of liquidation, the holders of the Preferred Shares will be entitled to a
minimum preferential liquidation payment of $.01 per share but will be entitled
to an aggregate payment of 100 times the payment made per Common Share. Finally,
in the event of any merger, consolidation or other transaction in which Common
Shares are exchanged, each Preferred Share will be entitled to receive 100 times
the amount received per Common Share. These rights are subject to adjustment in
the event of a stock dividend on the Common Shares or a subdivision, combination
or consolidation of the Common Shares.

          In the event that a person or group becomes an Acquiring Person
(except pursuant to a Permitted Offer (as defined below)), each holder of a 
Right, other than the Acquiring Person or the affiliates, associates or
transferees thereof (whose Rights will thereafter be void), will thereafter have
the right to receive upon exercise thereof at the then current exercise price of
the Right that number of Common Shares having a market value of two times the
exercise price of the Right, subject to certain possible adjustments.

          In the event that the Company is acquired in certain mergers or other
business combination transactions or 50% or more of the assets or earning power
of the Company and its subsidiaries (taken as a whole) are sold after a person
or group becomes an Acquiring Person (except pursuant to a Permitted Offer (as
defined below)), holders of the Rights will thereafter have the Right to
receive, upon exercise thereof at the then current exercise price of the Right,
that number of Common Shares of the acquiring company (or, in certain cases, one
of its Affiliates) having a market value of two times the exercise price of the
Right.

          A "Permitted Offer" is a tender offer or an exchange offer for all
outstanding Common Shares of the Company at a price and on terms determined by a
majority of the Board of Directors of the Company who are not officers of the
Company and who are not Acquiring Persons or affiliates or associates of an
Acquiring Person and after receiving advice from one or more investment banking
firms, to be (a) fair to shareholders (taking into account all factors which the
Board of Directors deems relevant) and (b) otherwise in the best interests of
the Company and its shareholders, employees, customers, suppliers and creditors
and the communities in which the Company does business, and which the Board of
Directors determines to recommend to the shareholders of the Company.

          At any time after a Person becomes an Acquiring Person (subject to
certain exceptions), and prior to the acquisition by a Person of 50% or more of
the outstanding Common Shares, the Continuing Directors may exchange all or part
of the Rights for Common Shares at an exchange ratio of one Common Share per
Right, subject to adjustment.

          At any time before a Person has become an Acquiring Person, the
Continuing Directors may redeem the Rights in whole, but not in part, at a price
of $.01 per Right (the "Redemption Price"), subject to adjustment.  The
redemption of the Rights may be made effective at such time, on such basis and
with such conditions as such Continuing Directors may, in their sole discretion,
establish.

                                      -3-
<PAGE>
 
          A "Continuing Director" is a member of the Board of Directors who was
a member of the Board on January 26, 1997, or who subsequently became or becomes
a member of the Board of Directors with the recommendation or approval of a
majority of the Continuing Directors.  Continuing Directors do not include any
Acquiring Person or affiliate or associate of an Acquiring Person.

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

          This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement, a copy of
which is filed as an Exhibit hereto and is incorporated herein by reference.


ITEM 2.   EXHIBITS

     1.   Rights Agreement, dated as of January 27, 1997, between the Company
          and Norwest Bank Minnesota, National Association, which includes as
          Exhibit B thereto the form of Right Certificate.

                                      -4-
<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, thereunto duly authorized.

                                        OTTER TAIL POWER COMPANY
Date:  January 27, 1997


                                        By /s/  A. E. Anderson
                                          --------------------------------------
                                          A. E. Anderson
                                          Vice President, Finance and
                                            Treasurer

                                      -5-
<PAGE>
 
                                 EXHIBIT INDEX
                                 -------------


EXHIBIT    DESCRIPTION OF EXHIBIT                                PAGE NUMBER
- -------    ----------------------                                -----------

   1       Rights Agreement, dated as of January 27, 1997,
           between Otter Tail Power Company and Norwest Bank
           Minnesota, National Association, as Rights Agent

                                      -6-

<PAGE>
 
                                                                       Exhibit 1
                                                                       ---------

================================================================================


                            OTTER TAIL POWER COMPANY


                                      AND

                            NORWEST BANK MINNESOTA,
                              NATIONAL ASSOCIATION



                                RIGHTS AGREEMENT


                          DATED AS OF JANUARY 27, 1997


================================================================================
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                        PAGE
                                                                        ----
<S>                                                                     <C>
Section 1.  Certain Definitions........................................    1

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

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

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

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

Section 6.  Transfer, Split Up, Combination and Exchange
               of Right Certificates; Mutilated, Destroyed,
               Lost or Stolen Right Certificates.......................    8

Section 7.  Exercise of Rights; Purchase Price;
               Expiration Date of Rights...............................    9

Section 8.  Cancellation and Destruction of Right Certificates.........   11

Section 9.  Availability of Preferred Shares...........................   11

Section 10. Preferred Shares Record Date...............................   12

Section 11. Adjustment of Purchase Price, Number
               of Shares or Number of Rights...........................   13

Section 12. Certificate of Adjusted Purchase Price or
               Number of Shares........................................   22

Section 13. Consolidation, Merger or Sale or Transfer
               of Assets or Earning Power..............................   22

Section 14. Fractional Rights and Fractional Shares....................   25

Section 15. Rights of Action...........................................   26

Section 16. Agreement of Right Holders.................................   27

Section 17. Right Certificate Holder Not Deemed a Shareholder..........   27
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<S>                                                                       <C> 
Section 18. Concerning the Rights Agent................................   28

Section 19. Merger or Consolidation or Change of
               Name of Rights Agent....................................   28

Section 20. Duties of Rights Agent.....................................   29

Section 21. Change of Rights Agent.....................................   31

Section 22. Issuance of New Right Certificates.........................   32

Section 23. Redemption.................................................   33

Section 24. Exchange...................................................   34

Section 25. Notice of Certain Events...................................   35

Section 26. Notices....................................................   36

Section 27. Supplements and Amendments.................................   36

Section 28. Successors.................................................   37

Section 29. Benefits of this Agreement.................................   37

Section 30. Severability...............................................   37

Section 31. Governing Law..............................................   37

Section 32. Counterparts...............................................   38

Section 33. Descriptive Headings.......................................   38

Signatures.............................................................   39
</TABLE>

Exhibit A -- Certificate of Designation of Series A Junior Participating
               Preferred Stock

Exhibit B -- Form of Right Certificates

Exhibit C -- Summary of Rights to Purchase Preferred Shares

                                     -ii-
<PAGE>
 
                                RIGHTS AGREEMENT


          AGREEMENT, dated as of January 27, 1997, between OTTER TAIL POWER
COMPANY, a Minnesota corporation (the "Company"), and NORWEST BANK MINNESOTA,
NATIONAL ASSOCIATION (the "Rights Agent").

          The Board of Directors of the Company has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
of the Company outstanding at the Close of Business on February 7, 1997 (the
"Record Date"), each Right representing the right to purchase one one-hundredth
of a Preferred Share, 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 and 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:

          "Acquiring Person" shall mean any Person who or which, together with
           ----------------                                                   
     all Affiliates and Associates of such Person, shall be the Beneficial Owner
     of the Threshold Percentage or more of the Common Shares then outstanding,
     other than pursuant to a Permitted Offer, but shall not include any Exempt
     Person. Notwithstanding the foregoing, no Person shall become an "Acquiring
     Person" as the result of an acquisition of Common Shares by the Company
     which, by reducing the number of shares outstanding, increases the
     proportionate number of shares beneficially owned by such Person to the
     Threshold Percentage or more of the Common Shares of the Company then
     outstanding; provided, however, that if a Person shall become the
                  --------  -------
     Beneficial Owner of the Threshold Percentage or more of the Common Shares
     of the Company then outstanding by reason of share purchases by the Company
     and shall, after such share purchases by the Company, increase the number
     of Common Shares of the Company beneficially owned by such Person above the
     number of Common Shares of the Company beneficially owned by such Person at
     the time of the last such share purchase by the Company, then such Person
     shall be deemed to be an "Acquiring Person." Notwithstanding the foregoing,
     if the Board of Directors of the Company determines in good faith that a
     Person who would otherwise be an "Acquiring Person", as defined pursuant to
     the foregoing provisions of
<PAGE>
 
this paragraph, has become such inadvertently, and such Person divests as
promptly as practicable a sufficient number of Common Shares so that such Person
would no longer be an "Acquiring Person", as defined pursuant to the foregoing
provisions of this paragraph, then such Person shall not be deemed to be an
"Acquiring Person" for any purposes of this Agreement.

          "Affiliate" and "Associate" shall have the respective meanings
           ---------       ---------                                    
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Exchange Act.

          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, including without
     limitation securities with respect to which such Person or any such
     Person's Affiliates or Associates has "beneficial ownership" pursuant to
     Rule 13d-3 of the General Rules and Regulations under the Exchange Act, as
     in effect on the date of this Agreement;

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

                                      -2-
<PAGE>
 
          (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) for the purpose of acquiring, holding,
     voting (except to the extent contemplated by the proviso to clause(ii)(B)
     above) or disposing of any securities of the Company.

Notwithstanding anything in this definition of Beneficial Ownership to the
contrary, the phrase "then outstanding," when used with reference to a Person's
Beneficial Ownership of securities of the Company, 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.

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

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

          "Common Shares," when used with reference to the Company, shall mean
           -------------                                                      
the Common Shares, par value $5.00 per share, of the Company.  "Common Shares,"
                                                                -------------  
when used with reference to any Person other than the Company, shall mean the
capital stock (or equity interest) with the greatest voting power of such other
Person or, if such other Person is a Subsidiary of any other Person, the Person
or Persons which ultimately control such first mentioned Person.

          "Continuing Director" shall mean (a) any member of the Board of
           -------------------                                           
Directors of the Company, while such Person is a member of the Board of
Directors, who is not an Acquiring Person, or an Affiliate or Associate of an
Acquiring Person, or a representative of an Acquiring Person or of any such
Affiliate or Associate, and was a member of the Board of Directors prior to the
date of this Agreement, or (b) any Person who subsequently becomes a member of
the Board of Directors, while such Person is a member of the Board of Directors,
who is not an Acquiring Person, or an Affiliate or Associate of an Acquiring
Person or of such Affiliate or Associate, if such 

                                      -3-
<PAGE>
 
Person's nomination for election or election to the Board of Directors is
recommended or approved by a majority of the Continuing Directors.

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

          "Exchange Act" shall mean the Securities Exchange Act of 1934, as
           ------------                                                    
amended.

          "Exchange Date" shall have the meaning set forth in Section 7.
           -------------                                                

          "Exempt Person" shall mean the Company, any Subsidiary of the Company,
           -------------                                                        
any employee benefit plan of the Company or of any Subsidiary of the Company,
and any Person organized, appointed or established by the Company for or
pursuant to the terms of any such plan, and any Person who or which, together
with all Affiliates and Associates of such Person, shall become the Beneficial
Owner of the Threshold Percentage or more of the then outstanding Common Shares
as the result of acquisitions of Common Shares directly from the Company.

          "Final Expiration Date" shall have the meaning set forth in Section 7.
           ---------------------                                                

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

          "Permitted Offer" shall mean a tender offer or an exchange offer for
           ---------------                                                    
all outstanding Common Shares of the Company at a price and on terms determined,
prior to the purchase of shares under such tender or exchange offer, by a
majority of the members of the Board of Directors of the Company who are not
officers of the Company and who are not Acquiring Persons or Affiliates,
Associates or representatives of an Acquiring Person, after receiving advice
from one or more investment banking firms, to be (a) fair to shareholders of the
Company (taking into account all factors which such members of the Board of
Directors deems relevant) and (b) otherwise in the best interests of the
Company, its shareholders, employees, customers, suppliers and creditors and the
communities in which the Company does business, and which such members of the
Board of Directors determines to recommend to the shareholders of the Company.

          "Preferred Shares" shall mean shares of Series A Junior Participating
           ----------------                                                    
Preferred Stock, without par value, of the Company having the rights and
preferences set forth in the form of Certificate of Designations attached to
this Agreement as Exhibit A.

                                      -4-
<PAGE>
 
               "Redemption Date" shall have the meaning set forth in Section 7.
               ---------------                                                

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

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

               "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 Section 13(d) of the Exchange Act) by the
Company or any Person that such Person has become an Acquiring Person.

               "Subsidiary" of any Person shall mean any corporation or other 
                ----------     
entity of which a majority of the voting power of the voting equity securities
or equity interest is owned, directly or indirectly, by such Person.

               "Threshold Percentage" shall mean 15%.
                --------------------                 

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

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

          Section 3.  Issue of Right Certificates.
                      --------------------------- 

          (a)  Until the earlier of (i) the Shares Acquisition Date or (ii) the
tenth day (or such later date as may be determined by action of the Board of
Directors prior to such time as any Person becomes an Acquiring Person) after
the date of the commencement by any Person (other than an Exempt Person) of, or
of the first public announcement of the intention of any Person (other than an
Exempt Person) to commence, a tender or exchange offer the consummation of which
would result in any Person becoming an Acquiring Person (the earlier of such
dates being referred to herein as the "Distribution Date"), (x) the Rights will
                                       -----------------                       
be evidenced (subject to the provisions of Section 3(b)) 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 

                                      -5-
<PAGE>
 
Certificates will be transferable only in connection with the transfer of Common
Shares. As soon as practicable after the Distribution Date, the Company will
prepare and execute, the Rights Agent will countersign, and the Company will
send or cause to be sent (and the Rights Agent will, if requested, send) 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 Company, a Right Certificate, in substantially the
form of Exhibit B (a "Right Certificate"), evidencing one Right for each Common
                      -----------------
Share so held. As of the Distribution Date, the Rights will be evidenced solely
by such Right Certificates.

          (b)  As soon as practicable after the Record Date, the Company will
send a copy of a Summary of Rights to Purchase Preferred Shares, in
substantially the form of Exhibit C (the "Summary of Rights"), by first-class,
                                          -----------------                   
postage-prepaid mail, to each record holder of Common Shares as of the Close of
Business on the Record Date, at the address of such holder shown on the records
of the Company.  With respect to certificates for Common Shares outstanding as
of the Close of Business on 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.  Until the
Distribution Date (or the earlier of the Redemption Date or the Final Expiration
Date if occurring prior to the Distribution Date), the surrender for transfer of
any certificate for Common Shares outstanding on the Record Date, with or
without a copy of the Summary of Rights attached thereto, shall also constitute
the transfer of the Rights associated with the Common Shares represented
thereby.

          (c)  Certificates for Common Shares which become outstanding after the
Record Date but prior to the earliest of the Distribution Date, the Redemption
Date or the Final Expiration Date shall have impressed on, printed on, written
on or otherwise affixed to them the following legend:

     This certificate also evidences and entitles the holder hereof to certain
     rights as set forth in a Rights Agreement between Otter Tail Power Company
     and Norwest Bank Minnesota, National Association, dated as of January 27,
     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 Otter Tail Power Company. Under certain circumstances,
     as set forth in the Rights Agreement, such Rights will be evidenced by
     separate certificates and will no longer be evidenced by this certificate.
     Otter Tail Power Company will mail to the holder of this certificate a copy
     of the Rights Agreement without charge after receipt of a written request
     therefor. Under certain circumstances, as set forth in the Rights
     Agreement, Rights issued to any Person who becomes an Acquiring Person or
     an Associate or Affiliate thereof (as defined in the Rights Agreement), or
     certain transferees of such Person, may become null and void.

                                      -6-
<PAGE>
 
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.

          Section 4.  Form of Right Certificates.
                      -------------------------- 

          (a)  The Right Certificates (and the forms of election to purchase
Preferred Shares and of assignment to be printed on the reverse thereof) shall
be substantially the same as Exhibit B and may have such marks of identification
or designation and such legends, summaries or endorsements printed thereon as
the Company may deem appropriate and as are not inconsistent with the provisions
of this 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 or automated quotations system on which the Rights may
from time to time be listed, or to conform to usage.  Subject to the provisions
of Section 11, 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 number of such one one-hundredths of a
              --------------                                                  
Preferred Share and the Purchase Price shall be subject to adjustment as
provided herein.

          (b)  Any Rights Certificate issued pursuant to Section 3(a) or Section
22 hereof that represents Rights beneficially owned by:  (i) an Acquiring Person
or any Associate or Affiliate of an Acquiring Person, (ii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such, or (iii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such and
receives such Rights pursuant to either (A) a transfer (whether or not for
consideration) from the Acquiring Person to holders of equity interests in such
Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of a plan, arrangement or understanding which has as a
primary purpose or effect the avoidance of Section 7(e) hereof, and any Rights
Certificate issued pursuant to Section 6 or Section 11 hereof upon transfer,
exchange, replacement or adjustment of any other Rights Certificate referred to
in this sentence, shall contain (to the extent feasible) the following legend:

     The Rights represented by this Rights Certificate are or were beneficially
     owned by a Person who was or became an Acquiring Person or an Affiliate or
     Associate of an Acquiring Person (as such terms are defined in the Rights
     Agreement). Accordingly, this Rights Certificate and the Rights represented
     

                                      -7-
<PAGE>
 
     hereby may become null and void in the circumstances specified in
     Section 7(e) of such Agreement.

          Section 5.  Countersignature and Registration.  The Right Certificates
                      ---------------------------------                         
shall be executed on behalf of the Company by its Chairman of the Board, its
President, any of its Vice Presidents or its Treasurer either manually or by
facsimile signature and shall be attested by the Secretary or an Assistant
Secretary of the Company, either manually or by facsimile signature.  The Right
Certificates shall be manually countersigned by the Rights Agent for purposes of
authorization only and shall not be valid for any purpose unless countersigned.
In case any officer of the Company who shall have signed any of the Right
Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Right Certificates, nevertheless, may be countersigned by the Rights Agent
and issued and delivered by the Company with the same force and effect as though
the Person who signed such Right Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by any Person who, at the actual date of the execution of such Right
Certificate, shall be a proper officer of the Company to sign such Right
Certificate, although at the date of the execution of this Rights Agreement any
such Person was not such an officer.

          Following the Distribution Date, the Rights Agent will keep or cause
to be kept, at its principal office, 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 date of
each of the Right Certificates.

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

          (a)  Subject to the provisions of Section 4(b), Section 7(e) and
Section 14, 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,
Common Shares, other securities, cash or other assets, as the case may be) as
the Right Certificate or Right Certificates surrendered then entitled such
holder to purchase.  Any registered holder desiring to transfer, split up,
combine or exchange any Right Certificate or Right Certificates shall make such
request in writing delivered to the Rights Agent, and shall surrender the Right
Certificate or Right Certificates to be transferred, split up, combined or
exchanged at the principal office of the Rights Agent.  Thereupon the Rights
Agent shall, subject to Section 4(b), Section 7(e), Section 14 and Section 24,

                                      -8-
<PAGE>
 
countersign and deliver to the Person entitled thereto a Right Certificate or
Right Certificates, as the case may be, as so requested.  The Company may
require payment of a sum sufficient to cover any tax or governmental charge that
may be imposed in connection with any transfer, split up, combination or
exchange of Right Certificates.

          (b)  Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Right Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Right Certificate if mutilated, the Company will issue, execute 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), the registered holder of any Right
Certificate may exercise the Rights evidenced thereby (except as otherwise
provided herein) in whole or in part at any time after the Distribution Date
upon surrender of the Right Certificate, with the form of election to purchase
on the reverse side thereof duly executed, to the Rights Agent at the office or
offices of the Rights Agent designated for such purpose, together with payment
of the Purchase Price for each one one-hundredth of a Preferred Share as to
which the Rights are exercised, at or prior to the earliest of (i) the Close of
Business on January 27, 2007 (the "Final Expiration Date"), (ii) the time at
                                   ---------------------                    
which the Rights are redeemed as provided in Section 23 (the "Redemption Date")
                                                              ---------------  
or (iii) the time at which such Rights are exchanged as provided in Section 24
(the "Exchange Date").
      -------------   

          (b)  The Purchase Price for each one one-hundredth of a Preferred
Share purchasable pursuant to the exercise of a Right shall initially be $70.00,
shall be subject to adjustment from time to time as provided in Sections 11 and
13 and shall be payable in lawful money of the United States of America in
accordance with paragraph (c) below.

          (c)  Upon receipt of a Right Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the Preferred Shares (or other shares,
securities, cash or other assets, 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 9 by certified check,
cashier's check or money order payable to the order of the Company, the Rights
Agent shall thereupon promptly (i) (A) requisition from any transfer agent for
the Preferred Shares (or make available, if the Rights Agent is 

                                      -9-
<PAGE>
 
the transfer agent for such shares) certificates for the number of Preferred
Shares to be purchased and the Company hereby irrevocably authorizes its
transfer agent to comply with all such requests, or (B) if the Company shall
have elected to deposit with a depository agent the total number of Preferred
Shares issuable upon exercise of the Rights hereunder, requisition from the
depositary agent depositary receipts representing such number of one one-
hundredths of a Preferred Share as are to be purchased (in which case
certificates for the Preferred Shares represented by such receipts shall be
deposited by the transfer agent with the depositary agent) and the Company
hereby directs the depositary agent to comply with such request, (ii) when
appropriate, requisition from the Company the amount of cash to be paid in lieu
of issuance of fractional shares in accordance with Section 14, (iii) after
receipt of such certificates or depositary receipts, cause the same to be
delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder, and (iv) when appropriate, after receipt, deliver such cash to or upon
the order of the registered holder of such Right Certificate.

          (d)  In case the registered holder of any Right Certificate shall
exercise less than all of 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
such holder's duly authorized assigns, subject to the provisions of Section 14.

          (e)  Notwithstanding anything in this Agreement to the contrary, from
and after the first occurrence of a Section 11(a)(ii) Event, any Rights
Beneficially Owned by (i) an Acquiring Person or an Associate or Affiliate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such, or (iii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently with
the Acquiring Person becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for consideration) from the Acquiring Person to
holders of equity interests in such Acquiring Person or to any Person with whom
the Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board of Directors
of the Company has determined is part of a plan, arrangement or understanding
which has as a primary purpose or effect the avoidance of this Section 7(e),
shall become null and void without any further action and no holder of such
Rights shall have any rights whatsoever with respect to such Rights, whether
under any provision of this Agreement or otherwise.  The Company shall use all
reasonable efforts to insure that the provisions of this Section 7(e) and
Section 4(b) hereof are complied with, but shall have no liability to any holder
of Rights Certificates or other Person as a result of its failure to make any
determinations with respect to an Acquiring Person or any of their respective
Affiliates, Associates or transferees hereunder.

                                      -10-
<PAGE>
 
          (f)  Notwithstanding anything in this Agreement to the contrary,
neither the Rights Agent nor the Company shall be obligated to undertake any
action with respect to a registered holder upon the occurrence of any purported
exercise as set forth in this Section unless such registered holder shall have
(i) duly completed and executed 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) of such Right Certificate or Affiliates or
Associates thereof as the Company shall reasonably request.

          Section 8.  Cancellation and Destruction of Right Certificates.  All
                      --------------------------------------------------      
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company 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 Company shall deliver to
the Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Right Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof.  From time to time, the Rights
Agent shall deliver all canceled Right Certificates to the Company.

          Section 9.  Availability of Preferred Shares.
                      -------------------------------- 

          (a)  The Company covenants and agrees that it will cause to be
reserved and kept available out of its authorized and unissued Preferred Shares
the number of Preferred Shares that will be sufficient to permit the exercise in
full of all outstanding Rights.

          (b)  At such time, if any, as the Preferred Shares issuable upon the
exercise of Rights may be listed on any national securities exchange, the
Company shall use its best efforts to cause, from and after such time as the
Rights become exercisable (but only to the extent that it is reasonably likely
that the Rights will be exercised), all shares reserved for such issuance to be
listed on such exchange upon official notice of issuance upon such exercise.

          (c)  The Company will prepare and file, as soon as practicable after
the Distribution Date, a registration statement under the Securities Act of
1933, as amended (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 (i) become effective as soon as
practicable after such filing, and (ii) remain effective (with a prospectus at
all times meeting the requirements of the Act) until the earlier of (A) the date
as of which the Rights are no longer exercisable for such securities or (B) the
Final Expiration Date.  The Company will 

                                      -11-
<PAGE>
 
also take such action as may be appropriate under, or to ensure compliance with,
the securities or "blue sky" laws of the various states in connection with the
exercisability of the Rights. The Company may temporarily suspend, for a period
of time not to exceed 90 days after the date the registration statement is
filed, the exercisability of the Rights in order to permit the registration
statement to become effective. Upon any such suspension, the Company shall issue
a public announcement stating that the exercisability of the Rights has been
temporarily suspended, as well as a public announcement at such time as the
suspension is no longer in effect. Notwithstanding any provision of this
Agreement to the contrary, the Rights shall not be exercisable in any
jurisdiction if the requisite qualification in such jurisdiction shall not have
been obtained or the exercise thereof is not permitted under applicable law.

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

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

          Section 10.  Preferred Shares Record Date.  Each Person in whose name
                       ----------------------------                            
any certificate for a number of one one-hundredths of a Preferred Share (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 transfer books of the Company for the Preferred
Shares are closed, such Person shall be deemed to have become the record holder
of such shares on, and 

                                      -12-
<PAGE>
 
such certificate shall be dated, the next succeeding Business Day on which such
transfer books are open. Prior to the exercise of the Rights evidenced thereby,
the holder of a Right Certificate shall not be entitled to any rights of a
holder of Preferred Shares for which the Rights shall be exercisable, including,
without limitation, the right to vote, to receive dividends or other
distributions or to exercise any preemptive rights, and shall not be entitled to
receive any notice of any proceedings of the Company, except as provided herein.

          Section 11.  Adjustment of Purchase Price, Number of Shares or Number
                       --------------------------------------------------------
of Rights.  The Purchase Price, the number and kind of shares covered by each
- ---------                                                                    
Right and the number of Rights outstanding are subject to adjustment from time
to time as provided in this Section 11:

          (a)(i)    In the event the Company shall at any time after the date of
     this Agreement (A) declare a dividend on the Preferred 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 Company is the continuing or
     surviving corporation), except as otherwise provided in this Section 11(a)
     and Section 7(e), 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 Company 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 value of the
     shares of capital stock of the Company 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)  Subject to Section 24 of this Agreement, in the event any Person
     becomes an Acquiring Person, other than pursuant to any transaction set
     forth in Section 13(a), then proper provision shall be made so that each
     holder of a Right (except as otherwise provided below and in Section 7(e))
     shall thereafter have a right to receive, upon exercise thereof at the then
     current Purchase Price in accordance with the terms of this Agreement and
     in 

                                      -13-
<PAGE>
 
     lieu of Preferred Shares, such number of Common Shares of the Company as
     shall equal the result obtained by (x) multiplying the then current
     Purchase Price by the number of one one-hundredths of a Preferred Share for
     which a Right was exercisable immediately prior to the first occurrence of
     a Section 11(a)(ii) Event and dividing that product by (y) 50% of the then
     current per share market price of the Company's Common Shares (determined
     pursuant to Section 11(d)) on the date of the occurrence of such event
     (such number of shares being referred to as the "Adjustment Shares"). In
                                                      -----------------
     the event that any Person shall become an Acquiring Person and the Rights
     shall then be outstanding, the Company shall not take any action which
     would eliminate or diminish the benefits intended to be afforded by the
     Rights.

          (iii)  In the event that the number of Common Shares which are
     authorized by the Company's Articles of Incorporation but not outstanding
     or reserved for issuance for purposes other than upon exercise of the
     Rights are not sufficient to permit the exercise in full of the Rights in
     accordance with the foregoing subparagraph (ii) of this Section 11(a), the
     Company shall (A) determine the value of the Adjustment Shares issuable
     upon the exercise of a Right (the "Current Value"), and (B) with respect to
                                        --------------   
     each Right (subject to Section 7(e) hereof), make adequate provision to
     substitute for the Adjustment Shares, upon the exercise of a Right and
     payment of the applicable Purchase Price, (1) cash, (2) a reduction in the
     Purchase Price, (3) Common Shares or other equity securities of the Company
     (including, without limitations, shares, or units of shares, of preferred
     shares, such as the Preferred Shares, which the Board has deemed to have
     essentially the same value or economic rights as Common Shares (such shares
     of preferred shares being referred to as "Common Share Equivalents")),
                                               ------------------------   
     (4) debt securities of the Company, (5) other assets, or (6) any
     combination of the foregoing, having an aggregate value equal to the
     Current Value (less the amount of any reduction in the Purchase Price),
     where such aggregate value has been determined by the Board based upon the
     advice of a nationally recognized investment banking firm selected by the
     Board; provided, however, that if the Company shall not have made adequate
     provision to deliver value pursuant to clause (B) above within thirty (30)
     days following the first occurrence of a Section 11(a)(ii) Event, then the
     Company shall be obligated to deliver, upon the surrender for exercise of a
     Right and without requiring payment of the Purchase Price, Common Shares
     (to the extent available) and then, if necessary, cash, which shares and/or
     cash have an aggregate value equal to the Spread. For purposes of the
     preceding sentence, the term "Spread" shall mean the excess of (i) the
                                   ------
     Current Value over (ii) the Purchase Price. If the Board determines in good
     faith that it is likely that sufficient additional Common Shares could be
     authorized for issuance upon exercise in full of the Rights, the thirty
     (30) day period set forth above may be extended to the extent necessary,
     but not more than ninety (90) days after the Section 11(a)(ii) Event, 

                                      -14-
<PAGE>
 
     in order that the Company may seek shareholder approval for the
     authorization of such additional shares (such thirty (30) day period, as it
     may be extended, is herein called the "Substitution Period"). To the extent
                                            ------------------- 
     that action is to be taken pursuant to the first and/or third sentences of
     this Section 11(a)(iii), the Company (1) shall provide, subject to
     Section 7(e) hereof, that such action shall apply uniformly to all
     outstanding Rights, and (2) may suspend the exercisability of the Rights
     until the expiration of the Substitution Period in order to seek such
     shareholder approval for such authorization of additional shares and/or to
     decide the appropriate form of distribution to be made pursuant to such
     first sentence and to determine the value thereof. In the event of any such
     suspension, the Company shall issue a public announcement stating that the
     exercisability of the Rights has been temporarily suspended, as well as a
     public announcement at such time as the suspension is no longer in effect.
     For purposes of this Section 11(a)(iii), the value of each Adjustment Share
     shall be the "current per share market price" (as determined pursuant to
     Section 11(d)(i)) per Common Share on the date of the first occurrence of
     Section 11(a)(ii) Event and the per share or per unit value of any Common
     Share Equivalent shall be deemed to equal the "current market price" per
     Common Share on such date.

          (b)  In case the Company shall fix a record date for the issuance of
     rights, options or warrants to all holders of Preferred Shares entitling
     them to subscribe for or purchase Preferred Shares (or shares having the
     same rights, privileges and preferences as the Preferred Shares (such
     shares are herein called "preferred share equivalents")) or securities
                               ---------------------------
     convertible into Preferred Shares or preferred share equivalents at a price
     per Preferred Share or preferred share equivalent (or having a conversion
     price per share, if a security convertible into Preferred Shares or
     preferred share equivalents) less than the then current per share market
     price (as such term is defined in Section 11(d)) of the Preferred Shares 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 preferred share equivalents so to be
     offered (and/or the aggregate initial conversion price of the convertible
     securities so to be offered) would purchase at such current market price
     and the denominator of which shall be the number of Preferred Shares
     outstanding on such record date plus the number of additional Preferred
     Shares and/or preferred share equivalents 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 Company issuable

                                      -15-
<PAGE>
 
     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 Company, whose determination shall be described
     in a statement filed with the Rights Agent and shall be binding on the
     Rights Agent and the holders of the Rights. Preferred Shares held for the
     account of the Company shall not be deemed outstanding for the purpose of
     any such computation. Such adjustment shall be made successively whenever
     such a record date is fixed; and in the event that such rights, 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 Company 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
     Company is the continuing or surviving corporation) of evidences of
     indebtedness or assets (other than a regular quarterly cash dividend or a
     dividend payable in Preferred Shares) or subscription rights or warrants
     (excluding those referred to in Section 11(b)), 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 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
     Company, whose determination shall be described in a statement filed with
     the Rights Agent) of the portion of the assets or evidences of indebtedness
     so to be distributed or of such subscription rights or warrants applicable
     to one Preferred Share, and the denominator of which 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
     Company 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 30 consecutive
     Trading Days 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 

                                      -16-
<PAGE>
 
     securities convertible into such shares, or (B) any subdivision,
     combination or reclassification of such Security and prior to the
     expiration of 30 Trading Days after the ex-dividend date for such dividend
     or distribution, or the record date for such subdivision, combination or
     reclassification, then, and in each such case, the current per share market
     price 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 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 Company.
     If on any such day no market maker is making a market in the Common Shares,
     the fair value of such share on such day as determined in good faith by the
     Board of Directors of the Company shall be used in lieu of the closing
     price for such day. 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.

          (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); provided,
                                                               --------
     however, 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" of the Preferred Shares shall mean the fair value per
     share as determined in good faith by the Board of Directors of the Company,
     whose determination shall be described in a statement filed with the Rights
     Agent.

                                      -17-
<PAGE>
 
          (e)  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-millionth of a Preferred Share or one ten-thousandth of any other share
     or security as the case may be. Notwithstanding the first sentence of this
     Section 11(e), any adjustment required by this Section 11 shall be made no
     later than the earlier of (i) three years from the date of the transaction
     which requires such adjustment or (ii) the date of the expiration of the
     right to exercise any Rights.

          (f)  If as a result of an adjustment made pursuant to Section 11(a)
     and 13(a), the holder of any Right thereafter exercised shall become
     entitled to receive any shares of capital stock of the Company other than
     Preferred Shares, thereafter the number of such other shares so receivable
     upon exercise of any Right 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 Section 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 Company subsequent to any
     adjustment made to the Purchase Price hereunder shall evidence the right to
     purchase, at the adjusted Purchase Price, the number of one one-hundredths
     of a Preferred Share purchasable from time to time hereunder upon exercise
     of the Rights, all subject to further adjustment as provided herein.

          (h)  Unless the Company shall have exercised its election as provided
     in Section 11(i) below, subject to the provisions of Sections 11(a) and 13,
     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-millionth of a
     Preferred Share) obtained by (i) multiplying (x) the number of one one-
     hundredths of a share covered by a Right immediately prior to this
     adjustment by (y) the Purchase Price in effect immediately prior to such
     adjustment of the Purchase Price and (ii) dividing the product so obtained
     by the Purchase Price in effect immediately after such adjustment of the
     Purchase Price.

          (i)  The Company may elect on or after the date of any adjustment of
     the Purchase Price to adjust the number of Rights, in substitution for any

                                      -18-
<PAGE>
 
     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 Company shall make a public
     announcement of its election to adjust the number of Rights, indicating the
     record date for the adjustment, and, if known at the time, the amount of
     the adjustment to be made. This record date may be the date on which the
     Purchase Price is adjusted or any day thereafter, but, if the Right
     Certificates have been issued, shall be at least ten days later than the
     date of the public announcement. If Right Certificates have been issued,
     upon each adjustment of the number of Rights pursuant to this Section
     11(i), the Company shall, as promptly as practicable, cause to be
     distributed to holders of record of Right Certificates on such record date
     Right Certificates evidencing, subject to Section 14, the additional Rights
     to which such holders shall be entitled as a result of such adjustment, or,
     at the option of the Company, shall cause to be distributed to such holders
     of record in substitution and replacement for the Right Certificates held
     by such holders prior to the date of adjustment, and upon surrender
     thereof, if required by the Company, new Right Certificates evidencing all
     the Rights to which such holders shall be entitled after such adjustment.
     Right Certificates so to be distributed shall be issued, executed and
     countersigned in the manner provided for herein, may bear, at the option of
     the Company, the adjusted Purchase Price, and shall be registered in the
     names of the holders of record of Right Certificates on the record date
     specified in the public announcement.

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

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

                                      -19-
<PAGE>
 
          (l)  In any case in which this Section 11 shall require that an
     adjustment in the Purchase Price be made effective as of a record date for
     a specified event, the Company may elect to defer until the occurrence of
     such event the issuing to the holder of any Right exercised after such
     record date of the Preferred Shares and other capital stock or securities
     of the Company, if any, issuable upon such exercise over and above the
     Preferred Shares and other capital stock or securities of the Company, if
     any, issuable upon such exercise on the basis of the Purchase Price in
     effect prior to such adjustment; provided, however, that the Company shall
     deliver to such holder a due bill or other appropriate instrument
     evidencing such holder's right to receive such additional shares upon the
     occurrence of the event requiring such adjustment.

          (m)  Anything in this Section 11 to the contrary notwithstanding, the
     Company shall be entitled to make such reductions in the Purchase Price, in
     addition to those adjustments expressly required by this Section 11, as and
     to the extent that in their sole discretion the Board of Directors of the
     Company shall determine to be advisable in order that any (i) consolidation
     or subdivision of the Preferred Shares, (ii) issuance wholly for cash of
     any 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) dividends on
     Preferred Shares payable in Preferred Shares or (v) issuance of rights,
     options or warrants referred to hereinabove in Section 11(b), hereafter
     made by the Company to holders of its Preferred Shares shall not be taxable
     to such shareholders.

          (n)  The Company covenants and agrees that it shall not, at any time
     after the Distribution Date, (i) consolidate with any other Person (other
     than a Subsidiary of the Company in a transaction which complies with
     Section 11(o) hereof), (ii) merge with or into any other Person (other than
     a Subsidiary of the Company in a transaction which complies with Section
     11(o) hereof), or (iii) sell or transfer (or permit any Subsidiary to sell
     or transfer), in one transaction, or a series of related transactions,
     assets or earning power aggregating more than 50% of the assets or earning
     power of the Company and its Subsidiaries (taken as a whole) to any other
     Person or Persons (other than the Company and/or any of its subsidiaries in
     one or more transaction each of which complies with Section 11(o) hereof),
     if (x) at the time of or immediately after such consolidation, merger or
     sale there are any rights, warrants or other instruments or securities
     outstanding or agreements in effect which would substantially diminish or
     otherwise eliminate the benefits intended to be afforded by the Rights or
     (y) prior to, simultaneously with or immediately after such consolidation,
     merger or sale, the shareholders of the Person who constitutes, or would
     constitute, the "Principal Party" for purposes of Section 13(a) hereof
     shall have received a 

                                      -20-
<PAGE>
 
     distribution of Rights previously owned by such Person or any of its
     Affiliates and Associates.

          (o)  The Company covenants and agrees that, after the Distribution
     Date, it will not, except as permitted by Section 23, 24 or 27, take (or
     permit any Subsidiary of the Company to take) any action if at the time
     such action is taken it is reasonably foreseeable that such action will
     diminish substantially or otherwise eliminate the benefits intended to be
     afforded by the Rights unless such action is approved by a majority of the
     Continuing Directors.

          (p)  Anything in this Agreement or the Rights to the contrary
     notwithstanding, in the event that at any time after the date of this
     Agreement and prior to the Distribution Date, the Company 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 (i) the number of one one-hundredths of a Preferred Share purchasable
     after such event upon proper exercise of each Right shall be determined by
     multiplying the number of one one-hundredths of a Preferred Share so
     purchasable immediately prior to such event by a fraction, the numerator of
     which is the number of Common Shares outstanding immediately before such
     event and the denominator of which is the number of Common Shares
     outstanding immediately after such event, and (ii) each Common Share
     outstanding immediately after such event shall have issued with respect to
     it that number of Rights which each Common Share outstanding immediately
     prior to such event had issued with respect to it. The adjustments provided
     for in this Section 11(p) shall be made successively whenever such a
     dividend is declared or paid or such a subdivision, combination or
     consolidation is effected. If an event occurs which would require an
     adjustment under Section 11(a)(ii) and this Section 11(p), the adjustments
     provided for in this Section 11(p) shall be in addition and prior to any
     adjustment required pursuant to Section 11(a)(ii).

          Section 12.  Certificate of Adjusted Purchase Price or Number of
                       ---------------------------------------------------
Shares.  Whenever an adjustment is made as provided in Sections 11 and 13, the
- ------   
Company shall promptly (a) prepare a certificate setting forth such adjustment,
and a brief statement of the facts accounting for such adjustment, (b) file with
the Rights Agent and with each transfer agent for the Common Shares or the
Preferred Shares a copy of such certificate and (c) mail a brief summary thereof
to each holder of a Right Certificate in accordance with Section 25.

                                      -21-
<PAGE>
 
          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,

          (w)  the Company shall consolidate with, or merge with and into, any
     other Person (other than a Subsidiary of the Company in a transaction which
     complies with Section 11(o)) and the Company shall not be the continuing or
     surviving corporation of such consolidation or merger,

          (x)  any Person (other than a Subsidiary of the Company in a
     transaction which complies with Section 11(o)) shall consolidate with, or
     merge with and into, the Company, the Company shall be the continuing or
     surviving corporation of such consolidation or merger and, in connection
     with such consolidation or merger, all or part of the Common Shares shall
     be changed into or exchanged for stock or other securities of any other
     Person or cash or any other property,

          (y)  the Company shall effect a statutory share exchange with the
     outstanding Common Shares of the Company being exchanged for stock or other
     securities of any other Person, cash or property, or

          (z)  the Company shall sell or otherwise transfer (or one or more of
     its Subsidiaries shall sell or otherwise transfer), in one or more
     transactions, assets or earning power aggregating 50% or more of the assets
     or earning power of the Company and its Subsidiaries (taken as a whole) to
     any other Person (other than the Company or one or more of its wholly owned
     Subsidiaries in a transaction which complies with Section 11(o)),

then, and in each such case, except as contemplated by Section 13(e), proper
provision shall be made so that (i) each holder of a Right (except as otherwise
provided in Section 7(e)) shall thereafter have the right to receive, upon the
exercise thereof at the then current Purchase Price, in accordance with the
terms of this Agreement and in lieu of Preferred Shares, such number of validly
authorized and issued, fully paid, nonassessable and freely tradeable Common
Shares of the Principal Party, not subject to any liens, encumbrances, rights of
first refusal or adverse claims, as shall be equal to the result obtained by (x)
multiplying the then current Purchase Price by the number of one one-hundredths
of a Preferred Share for which a Right is, immediately prior to the first
occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has occurred
prior to the first occurrence of a Section 13 Event, multiplying the number of
such one one-hundredths of a shares for which a Right was exercisable
immediately prior to the first occurrence of the Section 11(a)(ii) Event by the
Purchase Price in effect immediately prior to the first

                                      -22-
<PAGE>
 
occurrence), exercisable and (y) dividing that product by 50% of the current per
share market price of the Common Shares of such Principal Party (determined
pursuant to Section 11(d)) 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 merger, consolidation, statutory share exchange, sale or
transfer, all the obligations and duties of the Company pursuant to this
Agreement; (iii) the term "Company" shall thereafter be deemed to refer to such
Principal Party, it being specifically intended that the provisions of Section
11 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 to permit the exercise of all outstanding Rights) in connection
with the consummation of any such transaction as may be necessary to assure that
the provisions of this Agreement shall thereafter be applicable, as nearly as
reasonably may be, in relation to its Common Shares thereafter deliverable upon
the exercise of the Rights.

          (b)  "Principal Party" shall mean:
                ---------------             

          (i)  in the case of any transaction described in clauses (w), (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 Company are converted in
     such merger, consolidation or exchange, or if no securities are so issued,
     the Person that is the other party to such merger, consolidation or
     exchange; and

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

provided, however, that in any such case, (1) if the Common Shares of such
- --------  -------                                                         
Person are not at such time or have not been continuously over the preceding 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,
and (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.

          (c)  The Company shall not consummate any Section 13 Event unless the
Principal Party shall have a sufficient number of authorized, unreserved Common
Shares which have not been issued or are held in treasury to permit the exercise
in full of the Rights in accordance with this Section 13 and unless prior
thereto the Company and such Principal Party shall have executed and delivered
to 

                                      -23-
<PAGE>
 
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 Section 13 Event, the Principal Party will:

          (i)  prepare and file a registration statement under the Act, with
     respect to the Rights and the securities purchasable upon exercise of the
     Rights, on an appropriate form, and 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 earlier of (1) the date as
     of which the Rights are no longer exercisable for such securities or (2)
     the Final Expiration Date;

          (ii)  take such action as may be appropriate under, or to ensure
     compliance with, the securities or "blue sky" laws of the various states in
     connection with the exercisability of the Rights; and

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

          (d)  The Company shall not enter into any transaction of the kind
referred to in this Section 13 if at the time of such transaction there are any
rights, warrants, instruments or securities outstanding or any agreements or
arrangements which, as a result of the consummation of such transaction, would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights. Without limiting the generality of the preceding
sentence, in case the Principal Party which is to be a party to a transaction of
the kind referred to in this Section 13 has a provision in any of its authorized
securities or in its articles of incorporation or bylaws or other instrument
governing its corporate affairs, which provision would have the effect of (i)
causing such Principal Party to issue, in connection with, or as a consequence
of, the consummation of a transaction of the kind referred to in this Section
13, Common Shares of such Principal Party at less than the then current per
share market price (determined pursuant to Section 11(d)) or securities
exercisable for or convertible into Common Shares of such Principal Party at
less than such then current market price (other than to holders of Rights
pursuant to this Section 13) or (ii) providing for any special payment, tax or
similar provisions in connection with the issuance of Common Shares of such
Principal Party pursuant to the provisions of Section 13; then, in such event,
the Company shall not consummate any such transaction unless prior thereto the
provision in question of such Principal Party shall have been canceled, waived
or amended so as to avoid any of the effects referred to in clauses (i) and (ii)
of this paragraph, or the authorized securities shall have been redeemed, so
that the applicable provision will have no effect in connection with, or as a
consequence of, the consummation of the proposed transaction.

                                      -24-
<PAGE>
 
          (e)  Notwithstanding anything in this Agreement to the contrary,
Section 13 shall not be applicable to a transaction described in clauses (w),
(x) or (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 tender
offer or exchange offer and (iii) the form of consideration being offered to the
remaining holders of Common Shares pursuant to such transaction is the same as
the form of consideration paid pursuant to such tender offer or exchange offer.
Upon consummation of any such transaction contemplated by this Section 13(e),
all Rights hereunder shall expire.

          (f)  The provisions of this Section 13 shall similarly apply to
successive mergers, consolidations, statutory share exchanges or sale or other
transfers.

          Section 14.  Fractional Rights and Fractional Shares.
                       --------------------------------------- 

          (a)  The Company 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 Company. 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 Company shall be used.

                                      -25-
<PAGE>
 
          (b)  The Company shall not be required to issue fractions of Preferred
Shares (other than fractions which are integral multiples of one one-hundredth
of a Preferred Share) upon exercise of the Rights or to distribute certificates
which evidence fractional Preferred Shares (other than fractions which are
integral multiples of one one-hundredth of a Preferred Share). Fractions of
Preferred Shares in integral multiples of one one-hundredth of a Preferred Share
may, at the election of the Company, be evidenced by depositary receipts
pursuant to an appropriate agreement between the Company and a depositary
selected by it; provided, however, that if the Company issues depositary
                --------- -------                                       
receipts pursuant to any such agreement, such agreement shall provide that the
holders of such depositary receipts shall have all the rights, privileges and
preferences to which they are entitled as beneficial owners of the Preferred
Shares represented by such depositary receipts. In lieu of fractional Preferred
Shares that are not integral multiples of one one-hundredth of a Preferred
Share, the Company shall pay 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)) for the Trading Day immediately prior to the date of such
exercise.

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

          Section 15.  Rights of Action.  All rights of action in respect of
                       ----------------                                     
this Agreement, excepting the rights of action given to the Rights Agent under
Section 18, 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 such holder's own behalf and
for such holder's own benefit, enforce, and may institute and maintain any suit,
action or proceeding against the Company to enforce, or otherwise act in respect
of, such holder's right to exercise the Rights evidenced by such Right
Certificate in the manner provided in such Right Certificate and in this
Agreement. Without limiting the foregoing or any remedies available to the
holders of Rights, it is specifically acknowledged that the holders of Rights
would not have an adequate remedy at law for any breach of this Agreement and
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.

                                      -26-
<PAGE>
 
          Section 16.  Agreement of Right Holders.  Every holder of a Right, by
                       --------------------------                              
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

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

          (b)  after the Distribution Date, the Right Certificates are
     transferable only on the registry books of the Rights Agent if surrendered
     at the principal office of the Rights Agent, duly endorsed or accompanied
     by a proper instrument of transfer; and

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

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

          Section 17.  Right Certificate Holder Not Deemed a Shareholder.  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 Company which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a shareholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
shareholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
shareholders (except as provided in Section 

                                      -27-
<PAGE>
 
25), or to receive dividends or subscription rights, or otherwise, until the
Right or Rights evidenced by such Right Certificate shall have been exercised in
accordance with the provisions of this Agreement.

          Section 18.  Concerning the Rights Agent.
                       --------------------------- 

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

          (b)  The Rights Agent shall be protected and shall incur no liability
for, or in respect of any action taken, suffered or omitted by it in connection
with, its administration of this Agreement in reliance upon any Right
Certificate or certificate for the Preferred Shares (or for scrip or depositary
receipts evidencing fractional interests in Preferred Shares) or Common Shares
or for other securities of the Company, instrument of assignment or transfer,
power of attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement, or other paper or document believed by it to be genuine
and to be signed, executed and, where necessary, verified or acknowledged, by
the proper Person or Persons, or otherwise upon the advice of counsel as set
forth in Section 20.

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

          (a)  Any corporation into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the stock transfer or corporate trust business of the Rights Agent or any
successor Rights Agent, shall be the successor to the Rights Agent under this
Agreement without the execution or filing of any paper or any further act on the
part of any of the parties to this Agreement, provided that such corporation
would be eligible for appointment as a successor Rights Agent under the
provisions of Section 21. 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 the predecessor Rights Agent and deliver such
Right Certificates so countersigned; and in case at 

                                      -28-
<PAGE>
 
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 Rights Agent or in the name of the successor Rights
Agent; and in all such cases such Right Certificates shall have the full force
provided in the Right Certificates and in this Agreement.

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

          Section 20.  Duties of Rights Agent.  The Rights Agent undertakes the
                       ----------------------                                  
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of Right Certificates,
by their acceptance thereof, shall be bound:

          (a)  The Rights Agent may consult with legal counsel (who may be legal
     counsel for the Company), and the opinion of such counsel shall be full and
     complete authorization and protection to the Rights Agent as to any action
     taken 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 be proved or established by the Company prior to taking or suffering
     any action hereunder, such fact or matter (unless other evidence in respect
     thereof be herein specifically prescribed) may be deemed to be conclusively
     proved and established by a certificate signed by any one of the Chairman
     of the Board, the President, any Vice President, the Treasurer or the
     Secretary of the Company and delivered to the Rights Agent; and such
     certificate shall be full authorization to the Rights Agent for any action
     taken or suffered in good faith by it under the provisions of this
     Agreement in reliance upon such certificate.

          (c)  The Rights Agent shall be liable hereunder to the Company and any
     other Person 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 thereof) or be required to
     verify the 

                                      -29-
<PAGE>
 
     same, but all such statements and recitals are and shall be deemed to have
     been made by the Company only.

          (e) The Rights Agent shall not be under any responsibility in respect
     of the validity of this Agreement or the execution and delivery of this
     Agreement (except the due execution of this Agreement by the Rights Agent)
     or in respect of the validity or execution of any Right Certificate (except
     its countersignature thereof); nor shall it be responsible for any breach
     by the Company of any covenant or condition contained in this Agreement or
     in any Right Certificate; nor shall it be responsible for any change in the
     exercisability of the Rights (including the Rights becoming void pursuant
     to Section 11(a)(ii)) or any adjustment in the terms of the Rights
     (including the manner, method or amount thereof) provided for in Section 3,
     11, 13, 23 or 24, or the ascertaining of the existence of facts that would
     require any such change or adjustment (except with respect to the exercise
     of Rights evidenced by Right Certificates after receipt of actual notice
     from the Company stating that a change or adjustment is required and
     specifying the manner and amount thereof); 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 to be issued pursuant
     to this Agreement or any Right Certificate or as to whether any Preferred
     Shares will, when issued, be validly authorized and issued, fully paid and
     nonassessable.

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

          (g)  The Rights Agent is hereby authorized and directed to accept
     instructions with respect to the performance of its duties hereunder from
     any one of the Chairman of the Board, the President, any Vice President,
     the Secretary or the Treasurer of the Company, and to apply to such
     officers for advice or instructions in connection with its duties, and it
     shall not be liable for any action taken or suffered to be taken by it in
     good faith in accordance with instructions of any such officer or for any
     delay in acting while waiting for those instructions.

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

                                      -30-
<PAGE>
 
     Rights Agent from acting in any other capacity for the Company or for any
     other legal entity.

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

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

          Section 21.  Change of Rights Agent.  The Rights Agent or any
                       ----------------------                          
successor Rights Agent may resign and be discharged from its duties under this
Agreement upon 30 days' notice in writing mailed to the Company and to each
transfer agent of the Common Shares and Preferred Shares by registered or
certified mail, and to the holders of the Right Certificates by first-class
mail.  The Company may remove the Rights Agent or any successor Rights Agent
upon 30 days' notice in writing, mailed to the Rights Agent or successor Rights
Agent, as the case may be, and to each transfer agent of the Common Shares and
Preferred Shares by registered or certified mail, and to the 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 Company shall appoint
a successor to the Rights Agent.  If the Company shall fail to make such
appointment within a period of 30 days after giving notice of such removal or
after it has been notified in writing of such resignation or incapacity by the
resigning or incapacitated Rights Agent or by the holder of a Right Certificate
(who shall, with such notice, submit the holder's Right Certificate for
inspection by the Company), then the registered holder of any Right Certificate
may apply to any court of competent jurisdiction for the appointment of a new
Rights Agent.  Any successor Rights Agent, whether appointed by the Company or
by such a court, shall 

                                      -31-
<PAGE>
 
be (a) a corporation organized and doing business under the laws of the United
States or of the State of Minnesota or New York (or of any other state of the
United States so long as such corporation is authorized to do business as a
banking institution in the State of Minnesota or New York), in good standing,
having an office in the State of Minnesota or New York, 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 or is a subsidiary of a corporation which has at the time of its appointment
as Rights Agent a combined capital and surplus of at least $100 million, or
(b) an affiliate of a corporation described in clause (a) of this sentence.
After appointment, the successor Rights Agent shall be vested with the same
powers, rights, duties and responsibilities as if it had been originally named
as Rights Agent without further act or deed; but the predecessor Rights Agent
shall deliver and transfer to the successor Rights Agent any property at the
time held by it hereunder, and execute and deliver any further assurance,
conveyance, act or deed necessary for the purpose. Not later than the effective
date of any such appointment the Company shall file notice thereof in writing
with the predecessor Rights Agent and each transfer agent of the Common Shares
and Preferred Shares, and mail a notice thereof in writing to the registered
holders of the Right Certificates. Failure to give any notice provided for in
this Section 21, however, or any defect therein, 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
Company may, at its option, issue new Right Certificates evidencing Rights in
such form as may be approved by its Board of Directors to reflect any adjustment
or change 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 redemption or expiration of the Rights, the Company (a) shall, with
respect to Common Shares so issued or sold pursuant to the exercise of stock
options or under any employee plan or arrangement, granted or awarded as of the
Distribution Date, or upon the exercise, conversion or exchange of securities
hereinafter issued by the Company, and (b) may, in any other case, if deemed
necessary or appropriate by the Board of Directors of the Company, issue Rights
Certificates representing the appropriate number of rights in connection with
such issuance or sale; provided, however, that (i) no such Rights Certificate
shall be issued if, and to the extent that, the Company shall be advised by
counsel that such issuance would create a significant risk of material adverse
tax consequences to the Company or the Person to whom such Rights Certificate
would be issued, and (ii) no such Rights Certificate shall be issued if, and to
the extent that, appropriate adjustment shall otherwise have been made in lieu
of the issuance thereof.

                                      -32-
<PAGE>
 
          Section 23.  Redemption.
                       ---------- 

          (a)  At least a majority of the Continuing Directors may, at their
option, at any time prior to the earlier of (i) the Shares Acquisition Date or
(ii) the Final Expiration Date, redeem all but not less than all of the then
outstanding Rights at a redemption price of $.01 per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date of this Agreement (such redemption price being
hereinafter referred to as the "Redemption Price").  The redemption of the
                                ----------------                          
Rights by the Continuing Directors may be made effective at such time and on
such basis and with such conditions as the Continuing Directors in their sole
discretion may establish.  The Company may, at its option, pay the Redemption
Price in cash, Common Shares (based on the "current market price", as defined in
Section 11(d)(i), of the Common Shares at the time of the redemption) or any
other form of consideration deemed appropriate by a majority of the Continuing
Directors; provided, however, that if the Company elects to pay the Redemption
Price in Common Shares, the Company shall not be required to issue any
fractional Common Shares, and the number of shares issuable to each holder of
Rights shall be rounded down to the next whole number.

          (b)  Immediately upon the action of the Continuing Directors ordering
the redemption of the Rights pursuant to paragraph (a) of this Section 23, and
without any further action and without any notice, the right to exercise the
Rights will terminate and the only right thereafter of the holders of Rights
shall be to receive the Redemption Price.  The Company shall promptly give
public notice of any such redemption; provided, however, that the failure to
                                      --------  -------                     
give, or any defect in, any such notice shall not affect the validity of such
redemption.  Within ten days after such action of the Board of Directors
ordering the redemption of the Rights, the Company shall mail a notice of
redemption to all the holders of the then outstanding Rights at their last
addresses as they appear upon the registry books of the Rights Agent or, prior
to the Distribution Date, on the registry books of the transfer agent for the
Common Shares.  Any notice 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 Company nor any of its Affiliates or
Associates may redeem, acquire or purchase for value any Rights at any time in
any manner other than that specifically set forth in this Section 23 or in
Section 24, and other than in connection with the purchase of Common Shares
prior to the Distribution Date.

                                      -33-
<PAGE>
 
          Section 24.  Exchange.
                       -------- 

          (a)  At least a majority of the Continuing Directors may, at their
option, at any time after 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)), for
Common Shares at an exchange ratio of one Common Share per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date of this Agreement, (such exchange ratio being
hereinafter referred to as the "Exchange Ratio").  Notwithstanding the
                                --------------                        
foregoing, the Continuing Directors shall not be empowered to effect such
exchange at any time after any Person (other than an Exempt Person) 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 Continuing Directors ordering
the exchange of any Rights pursuant to paragraph (a) of this Section 24 and
without any further action and without any notice, the right to exercise such
Rights 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 Company shall
promptly give public notice of any such exchange; provided, however, that the
                                                  --------  -------          
failure to give, or any defect in, such notice shall not affect the validity of
such exchange.  The Company promptly shall mail a notice of any such exchange to
all 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 outstanding and
exercisable Rights (other than Rights which have become void pursuant to the
provisions of Section 11(a)(ii)) held by each holder of Rights.

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

                                      -34-
<PAGE>
 
share market price of one Preferred Share multiplied by such number or fraction
is equal to the current per share market price of one Common Share as of the
date of issuance of such Preferred Shares or fraction thereof.

          (d)  The Company shall not be required to issue fractions of Common
Shares or to distribute certificates which evidence fractional Common Shares.
In lieu of such fractional Common Shares, the Company shall pay to the
registered holders of the Right Certificates with regard to which such
fractional Common Shares would otherwise be issuable an amount in cash equal to
the same fraction of the current market value of a whole Common Share.  For the
purposes of this paragraph (d), the current market value of a whole Common Share
shall be the closing price of a Common Share (as determined pursuant to the
second sentence of Section 11(d)(i)) for the Trading Day immediately prior to
the date of exchange pursuant to this Section 24.

          Section 25.  Notice of Certain Events.
                       ------------------------ 

          (a)  In case the Company 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 regular
quarterly cash dividend), (ii) to offer to the holders of its Preferred Shares
rights or warrants to subscribe for or to purchase any additional Preferred
Shares or shares of stock of any class or any other securities, rights or
options, (iii) to effect any reclassification of its Preferred Shares (other
than a reclassification involving only the subdivision of outstanding Preferred
Shares), (iv) to effect any consolidation or merger into or with, or to effect
any sale or other transfer (or to permit one or more of its Subsidiaries to
effect any sale or other transfer), in one or more transactions, of 50% or more
of the assets or earning power of the Company and its Subsidiaries (taken as a
whole) to, any other Person, (v) to effect any statutory share exchange with the
outstanding Common Shares of the Company being exchanged for stock or other
securities of any other corporation or cash or other property, (vi) to effect
the liquidation, dissolution or winding up of the Company, or (vii) to declare
or pay any dividend on the Common Shares payable in Common Shares or to effect a
subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares),
then, in each such case, the Company shall give to each holder of a Right
Certificate, in accordance with Section 26, a notice of such proposed action,
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 Common
Shares and/or 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) of
this paragraph at least ten 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 ten days prior to the date of 

                                      -35-
<PAGE>
 
the taking of such proposed action or the date of participation therein by the
holders of the Common Shares and/or Preferred Shares, whichever shall be the
earlier.

          (b)  In case the event set forth in Section 11(a)(ii) shall occur,
then the Company shall as soon as practicable thereafter give to each holder of
a Right Certificate, in accordance with Section 26, 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).

          Section 26.  Notices.  Notices or demands authorized by this Agreement
                       -------                                                  
to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Company 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:

               Otter Tail Power Company
               215 South Cascade Street
               P.O. Box 496
               Fergus Falls, Minnesota  56538-0496

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement to be given or made by the Company or by the holder of any 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 Company) as follows:

               Norwest Bank Minnesota, N.A.
               Attention:  Shareholder Services
               161 North Concord Exchange
               South St. Paul, MN 55075-0738

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company.

          Section 27.  Supplements and Amendments.  Prior to the Distribution
                       --------------------------                            
Date and subject to the penultimate sentence of this Section 27, the Company and
the Rights Agent shall, if the Company so directs, supplement or amend any
provisions of this Agreement without the 

                                      -36-
<PAGE>
 
approval of any holders of certificates representing Common Shares. From and
after the Distribution Date and subject to the penultimate sentence of this
Section 27, the Company and the rights Agent shall, if the Company so directs,
supplement or amend this Agreement without the approval of any holders of Rights
Certificates in order (i) to cure any ambiguity, (ii) to correct or supplement
or amend any provision contained herein which may be defective or inconsistent
with any other provisions herein, (iii) to shorten or lengthen any time period
hereunder or (iv) to change or supplement the provisions hereunder in any manner
which the Company may deem necessary or desirable and which shall not adversely
affect the interests of the holders of Rights Certificates (other than an
Acquiring Person or an Affiliate or Associate of an Acquiring Person); provided,
this Agreement may not be supplemented or amended to lengthen, pursuant to
clause (iii) of this sentence, (A) a time period relating to when the Rights may
be redeemed at such time as the Rights are not then redeemable, or (B) any other
time period unless such lengthening is for the purpose of protecting, enhancing
or clarifying the rights of, and/or the benefits to, the holders of Rights
(other than an Acquiring Person and its Affiliates and Associates). Upon
delivery of a certificate from an appropriate officer of the Company which
states that the proposed supplement or amendment has been approved by a majority
of the Continuing Directors and is in compliance with the terms of this Section
27, the Rights Agent shall execute such supplement or amendment. Prior to the
Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of Common Shares.

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

          Section 29.  Benefits of this Agreement.  Nothing in this Agreement
                       --------------------------                            
shall be construed to give to any Person other than the Company, the Rights
Agent and the registered holders of the 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 Company, the Rights Agent and the registered holders of
the Right Certificates (and, prior to the Distribution Date, the Common Shares).

          Section 30.  Severability.  If any term, provision, covenant or
                       ------------                                      
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

          Section 31.  Governing Law.  This Agreement and each Right Certificate
                       -------------                                            
issued hereunder shall be deemed to be a contract made under the laws of the
State of Minnesota 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.

                                      -37-
<PAGE>
 
          Section 32.  Counterparts.  This Agreement may be executed in any
                       ------------                                        
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.

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

                                      -38-
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed, all as of the day and year first above written.

                                        OTTER TAIL POWER COMPANY


                                        By /s/  A. E. Anderson
                                           -------------------------------------

                                           Its Vice President, Finance and
                                               ---------------------------------
                                               Treasurer
                                               ---------------------------------



                                        NORWEST BANK MINNESOTA,
                                         NATIONAL ASSOCIATION


                                        By /s/  Barbara M. Novak
                                           -------------------------------------

                                           Its Vice President
                                               ---------------------------------

                                      -39-
<PAGE>
 
                                                                       EXHIBIT A
                                                                       ---------


                          CERTIFICATE OF DESIGNATION
                                      OF
                SERIES A JUNIOR PARTICIPATING PREFERRED SHARES
                                      OF
                           OTTER TAIL POWER COMPANY



          The undersigned hereby certifies that the Board of Directors of Otter
Tail Power Company (the "Corporation"), a corporation organized and existing
under the Minnesota Business Corporation Act, duly adopted the following
resolution on January 27, 1997:

          RESOLVED, that a series of preferred shares of the Corporation is
hereby created, and the designation and amount thereof and the relative rights
and preferences of the shares of such series, are as follows:

          Section 1.  Designation and Amount.  The shares of such series shall
                      ----------------------                                  
be designated as "Series A Junior Participating Preferred Shares" (the
"Preferred Shares") and the number of shares constituting the Preferred Shares
shall be 250,000.  Such number of shares may be increased or decreased by
resolution of the Board of Directors and any necessary shareholder approval;
provided, however, that no decrease shall reduce the number of Preferred Shares
- -----------------                                                              
to a number less than the number of shares then outstanding plus the number of
shares reserved for issuance upon the exercise of outstanding options, rights or
warrants or upon the conversion of any outstanding securities issued by the
Corporation convertible into Preferred Shares.

          Section 2.  Dividends and Distributions.
                      --------------------------- 

          (a)  Subject to the rights of the holders of any series of preferred
shares (or any similar stock) ranking prior and superior to the Preferred Shares
with respect to dividends, the holders of Preferred Shares, in preference to the
holders of common shares, par value $5.00 per share (the "Common Shares"), of
the Corporation, and of any other junior stock, shall be entitled to receive,
when, as and if declared by the Board of Directors out of funds legally
available for the purpose, quarterly dividends payable in cash on the first day
of March, June, September and December in each year (each such date being
referred to herein as a "Quarterly Dividend Payment Date"), commencing on the
first Quarterly Dividend Payment Date after the first issuance of a Preferred
Share or fraction of a Preferred Share, in an amount per share (rounded to the
nearest cent) equal to the greater of (i) $0.01 or 

                                      A-1
<PAGE>
 
(ii) 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 Common Shares or a subdivision
of the outstanding Common Shares (by reclassification or otherwise), declared on
the Common Shares since the immediately preceding Quarterly Dividend Payment
Date or, with respect to the first Quarterly Dividend Payment Date, since the
first issuance of any Preferred Share or fraction of a Preferred Share. In the
event the Corporation shall at any time after February 7, 1997, declare or pay
any dividend on the Common Shares payable in Common Shares, or effect a
subdivision or combination or consolidation of the outstanding Common Shares (by
reclassification or otherwise) into a greater or lesser number of Common Shares,
then in each such case the amount to which holders of Preferred Shares were
entitled immediately prior to such event under clause (ii) of the preceding
sentence shall be adjusted by multiplying such amount by a fraction, the
numerator of which is the number of Common Shares outstanding immediately after
such event and the denominator of which is the number of Common Shares that were
outstanding immediately prior to such event.

          (b)  The Corporation shall declare a dividend or distribution on the
Preferred Shares as provided in paragraph (a) of this Section immediately after
it declares a dividend or distribution on the Common Shares (other than a
dividend payable in Common Shares or a subdivision of the outstanding Common
Shares); provided that, in the event no dividend or distribution shall have been
declared on the Common Shares during the period between any Quarterly Dividend
Payment Date and the next subsequent Quarterly Dividend Payment Date, a dividend
of $0.01 per share on the Preferred Shares shall nevertheless be payable, out of
funds legally available for such purpose, on such subsequent Quarterly Dividend
Payment Date.

          (c)  Dividends shall begin to accrue and be cumulative on outstanding
Preferred Shares from their date of issue.  Accrued but unpaid dividends shall
not bear interest.  Dividends paid on the Preferred Shares in an amount less
than the total amount of such dividends at the time accrued and payable on such
shares shall be allocated pro rata on a share-by-share basis among all such
shares at the time outstanding.  The Board of Directors may fix a record date
for the determination of holders of Preferred Shares entitled to receive payment
of a dividend or distribution declared thereon, which record date shall be not
more than 60 days prior to the date fixed for the payment thereof.

                                      A-2
<PAGE>
 
          Section 3.  Certain Restrictions.
                      -------------------- 

          (a)  Whenever quarterly dividends or other dividends or distributions
payable on the Preferred Shares as provided in Section 2 are in arrears,
thereafter and until all accrued and unpaid dividends and distributions, whether
or not declared, on Preferred Shares outstanding shall have been paid in full,
the Corporation shall not:

          (i)    declare or pay dividends, or make any other distributions, on 
     any shares of stock ranking junior (either as to dividends or upon
     liquidation, dissolution or winding up) to the Preferred Shares;

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

          (iii)  redeem or purchase or otherwise acquire for consideration 
     shares of any stock ranking junior (either as to dividends or upon
     liquidation, dissolution or winding up) to the Preferred Shares; provided,
                                                                      ---------
     however, that the Corporation may at any time redeem, purchase or otherwise
     --------
     acquire shares of any such junior stock in exchange for shares of any stock
     of the Corporation ranking junior (either as to dividends or upon
     dissolution, liquidation or winding up) to the Preferred Shares; or

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

          (b)  The Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under paragraph (a) of
this Section 3, purchase or otherwise acquire such shares at such time and in
such manner.

          Section 4.  Reacquired Shares.  Any Preferred Shares 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

                                      A-3
<PAGE>
 
their cancellation become authorized but unissued shares of preferred stock and
may be reissued as part of a new series of preferred shares subject to the
conditions and restrictions on issuance set forth herein, in the Articles of
Incorporation, or in any other certificate of designation creating a series of
preferred stock or any similar stock or as otherwise required by law.

          Section 5.  Liquidation, Dissolution or Winding Up.  Upon any
                      --------------------------------------           
liquidation, dissolution or winding up of the Corporation, no distribution shall
be made (1) to the holders of shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Preferred
Shares unless, prior thereto, the holders of Preferred Shares shall have
received the greater of (i) $100 per share, plus an amount equal to accrued and
unpaid dividends and distributions thereon, whether or not declared, to the date
of such payment, or (ii) an aggregate amount per share, subject to the provision
for adjustment hereinafter set forth, equal to 100 times the aggregate amount to
be distributed per share to holders of Common Shares, or (2) to the holders of
stock ranking on a parity (either as to dividends or upon liquidation,
dissolution or winding up) with the Preferred Shares, except distributions made
ratably on the Preferred Shares and all such parity stock in proportion to the
total amounts to which the holders of all such shares are entitled upon such
liquidation, dissolution or winding up.  In the event the Corporation shall at
any time after February 7, 1997, declare or pay any dividend on the Common
Shares payable in shares of Common Shares, or effect a subdivision or
combination or consolidation of the outstanding Common Shares (by
reclassification or otherwise) into a greater or lesser number of Common Shares,
then in each such case the aggregate amount to which holders of shares of
Preferred Shares were entitled immediately prior to such event under clause
(1)(ii) of the preceding sentence shall be adjusted by multiplying such amount
by a fraction the numerator of which is the number of Common Shares outstanding
immediately after such event and the denominator of which is the number of
Common Shares that were outstanding immediately prior to such event.

          Section 6.  Consolidation, Merger, etc.  In case the Corporation shall
                      ---------------------------                               
enter into any consolidation, merger, combination or other transaction in which
the Common Shares are exchanged for or changed into other stock or securities,
cash and/or any other property, then in any such case each Preferred Share shall
at the same time be similarly exchanged or changed into an amount per share,
subject to the provision for adjustment hereinafter set forth, equal to 100
times the aggregate amount of stock, securities, cash and/or any other property
(payable in kind), as the case may be, into which or for which each Common Share
is changed or exchanged.  In the event the Corporation shall at any time after
February 7, 1997, declare or pay any dividend on the Common Shares payable in
Common Shares, or effect a subdivision or combination or consolidation of the
outstanding Common Shares (by reclassification or otherwise) into a greater or
lesser number of Common Shares, then in each such case the amount set forth in
the preceding sentence with respect 

                                      A-4
<PAGE>
 
to the exchange or change of Preferred Shares shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of Common Shares
outstanding immediately after such event and the denominator of which is the
number of Common Shares that were outstanding immediately prior to such event.

          Section 7.  No Redemption.  The Preferred Shares shall not be
                      -------------                                    
redeemable.

          Section 8.  Rank.  The Preferred Shares shall rank, with respect to
                      ----                                                   
the payment of dividends and the distribution of assets, junior to all other
series of the Corporation's preferred shares.

          Section 9.  Fractional Shares.  Preferred Shares may be issued in
                      -----------------                                    
fractions of a share which are integral multiples of one one-hundredth of a
share which shall entitle the holder, in proportion to such holder's fractional
shares, to receive dividends, participate in distributions and to have the
benefit of all other rights of holders of Preferred Shares.

          Section 11.  Amendment.  The Articles of Incorporation of the
                       ---------                                       
Corporation shall not be amended in any manner which would materially alter or
change the powers, preferences or rights of the Preferred Shares so as to affect
them adversely without the affirmative vote of the holders of at least two-
thirds of the outstanding Preferred Shares, voting together as a single class.

          IN WITNESS WHEREOF, I have subscribed my name this ___ day of ______
1997.


                                  OTTER TAIL POWER COMPANY



                                  By  ________________________
                                      
                                      Its  ______________________
                                      
                                      A-5
<PAGE>
 
                                                                       EXHIBIT B
                                                                       ---------


                          FORM OF RIGHT CERTIFICATES


Certificate No. R-___                               _____________________ Rights
                                  


NOT EXERCISABLE AFTER JANUARY 27, 2007 OR EARLIER IF REDEMPTION OR EXCHANGE
OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT (SUBJECT TO
ADJUSTMENT) AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.
UNDER CERTAIN CIRCUMSTANCES SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS
BENEFICIALLY OWNED BY A PERSON WHO IS, WAS OR BECOMES AN ACQUIRING PERSON OR AN
AFFILIATE OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE
RIGHTS AGREEMENT) AND SUBSEQUENT HOLDERS OF SUCH RIGHTS MAY BECOME NULL AND
VOID.


                               RIGHT CERTIFICATE

                           OTTER TAIL POWER COMPANY

          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 January 27, 1997 (the "Rights
Agreement"), between Otter Tail Power Company, a Minnesota corporation (the
"Company"), and Norwest Bank Minnesota, National Association (the "Rights
Agent"), to purchase from the Company at any time after the Distribution Date
(as such term is defined in the Rights Agreement) and prior to 5:00'P.M.,
Minneapolis time, on January 27, 2007 at the office or offices of the Rights
Agent designated for such purpose, or of its successor as Rights Agent, one one-
hundredth of a fully paid non-assessable share of Series A Junior Participating
Preferred Stock, without par value per share (the "Preferred Shares"), of the
Company, at a purchase price of $70.00 (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 February 7, 1997, based on the Preferred
Shares as constituted at such date.  As provided in the Rights Agreement, the
Purchase Price and the number of one one-hundredths of a Preferred Share 

                                      B-1
<PAGE>
 
which may be purchased upon the exercise of the Rights evidenced by this Right
Certificate are subject to modification and adjustment upon the happening of
certain events.

          This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Right Certificates.  Copies of
the Rights Agreement are on file at the principal executive offices of the
Company and the office or offices of the Rights Agent and will be mailed without
charge by the Company or the Rights Agent to the holder of this certificate
promptly following receipt by the Company or the Rights Agent of a written
request therefor.

          From and after the occurrence of a Section 11(a)(ii) Event (as such
term is defined in the Rights Agreement), any Rights that are or were acquired
or beneficially owned by any Acquiring Person (or any Associate or Affiliate of
such Acquiring Person) (as such terms are defined in the Rights Agreement) shall
be void and any holder of such Rights shall thereafter have no right to exercise
such Rights under any provision of this Agreement.

          This Right Certificate, with or without other Right Certificates, upon
surrender at the office or offices of the Rights Agent designated for such
purpose, 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 as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase.  If this Right Certificate shall be exercised in part, the holder
shall be entitled to receive upon surrender hereof another Right Certificate or
Right Certificates for the number of whole Rights not exercised.

          Subject to the provisions of the Rights Agreement, the Rights
evidenced by this certificate (i) may, but are not required to, be redeemed by
the Company at a redemption price of $.01 per Right, subject to adjustment as
provided in the Rights Agreement, and (ii) may, but are not required to, be
exchanged by the Company in whole or in part for Common Shares.

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

                                      B-2
<PAGE>
 
          No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Company which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a shareholder of the Company or any right to vote for the
election of directors or upon any matter submitted to shareholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting shareholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Right
Certificate shall have been exercised as provided in the Rights Agreement.

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

          WITNESS the manual or facsimile signature of the proper officer of the
Company.

Dated:

                                   OTTER TAIL POWER COMPANY



                                  By __________________________
                                     [Name and Title]


Countersigned for purposes
of authentication only:

NORWEST BANK MINNESOTA,
   NATIONAL ASSOCIATION


By _________________________
     Authorized Signature

                                      B-3
<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 ______________________________ (print name of transferee)
______________________________________ (print address of transferee) this Right
Certificate, together with all right, title and interest therein, and does
hereby irrevocably constitute and appoint _____________ Attorney, to transfer
the within Right Certificate on the books of the within-named Company, with full
power of substitution.

Please insert social security
number, taxpayer identification
number or other identifying number:__________________________________________

Dated:  ___________________
        
 
                                  ___________________________________________
                                  Signature

Signature Guaranteed:________________________________________________________

          The signature(s) should be guaranteed by an eligible guarantor
institution (banks, stockbrokers, savings and loan associations and credit
unions with membership in an approved signature guarantee medallion program),
pursuant to S.E.C. Rule 17Ad-15.
                                      B-4
<PAGE>
 
             Form of Reverse Side of Right Certificate--continued

                                  CERTIFICATE
                                  -----------

          The undersigned hereby certifies (after due inquiry and to the best of
its knowledge) by checking the appropriate boxes that:

          (1)  this Right Certificate

                   [    ]  is
                           or
                   [    ]  is not

being transferred by or on behalf of a Person who is or was an Acquiring Person
or an Affiliate or Associate of an Acquiring Person (as such terms are defined
in the Rights Agreement); and

          (2)  the undersigned

                   [    ]  did
                           or
                   [    ]  did not

acquire the Rights evidenced by this Right Certificate from any Person who is,
was or subsequently became an Acquiring Person or an Affiliate or Associate of
an Acquiring Person.


                               ______________________________________________  
                               Signature


                                    NOTICE
                                    ------

          The signature(s) on the foregoing Assignment and Certificate must
correspond to the name(s) as written upon the face of this Right Certificate in
every particular, with out alteration or enlargement or any change whatsoever.

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

                                      B-5
<PAGE>
 
             Form of Reverse Side of Right Certificate--continued

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

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

To:  Otter Tail Power Company

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

Please insert social security
number, taxpayer identification
number or other identifying number:_____________________________________________

________________________________________________________________________________
                        (Please print name and address)

________________________________________________________________________________

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

Please insert social security number,
taxpayer identification number
or other identifying number:____________________________________________________

_______________________________________________________________________________
                        (Please print name and address)

_______________________________________________________________________________

Dated: ___________________
       
                                    ____________________________________________
                                    Signature

Signature Guaranteed:___________________________________________________________

          The signature(s) should be guaranteed by an eligible guarantor
institution (banks, stockbrokers, savings and loan associations and credit
unions with membership in an approved signature guarantee medallion program),
pursuant to S.E.C. Rule 17Ad-15.

                                      B-6
<PAGE>
 
             Form of Reverse Side of Right Certificate--continued

                                  CERTIFICATE
                                  -----------

          The undersigned hereby certifies (after due inquiry and to the best of
its knowledge) by checking the appropriate boxes that:

          (1)  this Right Certificate

                   [    ]  is
                           or
                   [    ]  is not

being exercised by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate or Associate of an Acquiring Person (as such terms are defined in
the Rights Agreement); and

          (2)  the undersigned

                   [    ]  did
                           or
                   [    ]  did not

acquire the Rights evidenced by this Right Certificate from any Person who is,
was or subsequently became an Acquiring Person or an Affiliate or Associate of
an Acquiring Person.

                         
                               _________________________________________________
                               Signature


                                    NOTICE
                                    ------

          The signature(s) on the foregoing Election to Purchase and Certificate
must correspond to the name(s) as written upon the face of this Right
Certificate in every particular, with out alteration or enlargement or any
change whatsoever.

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

                                      B-7
<PAGE>
 
                                                                       EXHIBIT C
                                                                       ---------


                           OTTER TAIL POWER COMPANY

                         SUMMARY OF RIGHTS TO PURCHASE
                               PREFERRED SHARES


          On January 27, 1997, the Board of Directors of Otter Tail Power
Company (the "Company"), declared a dividend of one preferred share purchase
right (a "Right") per share for each outstanding Common Share, par value $5.00
(the "Common Shares"), of the Company.  The dividend is payable on February 7,
1997 (the "Record Date") to shareholders of record on that date.

          Each Right entitles the registered holder to purchase from the Company
one one-hundredth of a Series A Junior Participating Preferred Share, without
par value (the "Preferred Shares"), of the Company at a price of $70.00 per one-
hundredth of a Preferred Share (the "Purchase Price"), subject to adjustment.
The description and terms of the Rights are set forth in a Rights Agreement (the
"Rights Agreement"), dated as of January 27, 1997, between the Company and
Norwest Bank Minnesota, National Association, as Rights Agent (the "Rights
Agent").

          Initially, the Rights will be evidenced by the certificates
representing Common Shares then outstanding and no separate Right Certificates
will be distributed.  The Rights will separate from the Common Shares, and a
Distribution Date for the Rights will occur upon the earlier of:  (i) the first
date of public announcement that a Person or group of affiliated or associated
Persons has become an "Acquiring Person" (i.e., has become, subject to certain
exceptions, the beneficial owner of 15% or more of the outstanding Common
Shares) (except pursuant to a Permitted Offer, as hereinafter defined) and (ii)
the 10th day following the commencement or public announcement of a tender offer
or exchange offer, the consummation of which would result in a Person or group
of affiliated or associated Persons becoming, subject to certain exceptions, the
beneficial owner of 15% or more of the outstanding Common Shares (or such later
date as may be determined by the Board of Directors of the Company prior to a
Person or group of affiliated or associated Persons becoming an Acquiring
Person) (the earlier of such dates being called the "Distribution Date").

          Until the Distribution Date, (i) the Rights will be evidenced by the
Common Share certificates and will be transferred with and only with the Common
Shares, (ii) new Common Share certificates issued after the Record Date upon

                                      C-1
<PAGE>
 
transfer or new issuance of the Common Shares will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any Common Share certificate, even without such notation or a copy
of this Summary of Rights attached thereto, will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate.

          As promptly as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Shares as of the close of business on the
Distribution Date, and such separate Right Certificates alone will evidence the
Rights.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on January 27, 2007, unless extended or earlier redeemed or
exchanged by the Company as described below.

          The Purchase Price payable and the number of Preferred Shares or other
securities or property issuable upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution: (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain
rights, options or warrants to subscribe for or purchase Preferred Shares or
convertible securities at less than the then current market price of the
Preferred Shares, or (iii) upon the distribution to holders of the Preferred
Shares of evidences of indebtedness or assets (excluding regular periodic cash
dividends or dividends payable in Preferred Shares) or of subscription rights or
warrants (other than those described in clause (ii) of this paragraph).   With
certain exceptions, no adjustment in the Purchase Price will be required until
cumulative adjustments require an adjustment of at least 1% in the Purchase
Price.

          No fraction of a Preferred Share (other than fractions in integral
multiples of one one-hundredth of a share) will be issued and, in lieu thereof,
an adjustment in cash will be made based on the closing price on the last
trading date prior to the date of exercise.

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

          Preferred Shares purchasable upon exercise of the Rights will not be
redeemable.  Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $.01 per share but will be entitled to an
aggregate dividend of 100 times the dividend declared per Common Share.  In the
event of 

                                      C-2
<PAGE>
 
liquidation, the holders of the Preferred Shares will be entitled to a
minimum preferential liquidation payment of $.01 per share but will be entitled
to an aggregate payment of 100 times the payment made per Common Share.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
100 times the amount received per Common Share.  These rights are subject to
adjustment in the event of a stock dividend on the Common Shares or a
subdivision, combination or consolidation of the Common Shares.

          In the event that a person or group becomes an Acquiring Person
(except pursuant to a Permitted Offer (as defined below)), each holder of a
Right, other than the Acquiring Person or the affiliates, associates or
transferees thereof (whose Rights will thereafter be void), will thereafter have
the right to receive upon exercise thereof at the then current exercise price of
the Right that number of Common Shares having a market value of two times the
exercise price of the Right, subject to certain possible adjustments.

          In the event that the Company is acquired in certain mergers or other
business combination transactions or 50% or more of the assets or earning power
of the Company and its subsidiaries (taken as a whole) are sold after a person
or group becomes an Acquiring Person (except pursuant to a Permitted Offer),
holders of the Rights will thereafter have the Right to receive, upon exercise
thereof at the then current exercise price of the Right, that number of Common
Shares of the acquiring company (or, in certain cases, one of its Affiliates)
having a market value of two times the exercise price of the Right.

          A "Permitted Offer" is a tender offer or an exchange offer for all
outstanding Common Shares of the Company at a price and on terms determined by a
majority of the Board of Directors of the Company who are not officers of the
Company and who are not Acquiring Persons or affiliates or associates of an
Acquiring Person and after receiving advice from one or more investment banking
firms, to be (a) fair to shareholders (taking into account all factors which the
Board of Directors deems relevant) and (b) otherwise in the best interests of
the Company and its shareholders, employees, customers, suppliers and creditors
and the communities in which the Company does business, and which the Board of
Directors determines to recommend to the shareholders of the Company.

          At any time after a Person becomes an Acquiring Person (subject to
certain exceptions), and prior to the acquisition by a Person of 50% or more of
the outstanding Common Shares, the Continuing Directors may exchange all or part
of the Rights for Common Shares at an exchange ratio of one Common Share per
Right, subject to adjustment.

          At any time before a Person has become an Acquiring Person, the
Continuing Directors may redeem the Rights in whole, but not in part, at a price
of 

                                      C-3
<PAGE>
 
$.01 per Right (the "Redemption Price"), subject to adjustment. The redemption
of the Rights may be made effective at such time, on such basis and with such
conditions as such Continuing Directors may, in their sole discretion,
establish.

          A "Continuing Director" is a member of the Board of Directors who was
a member of the Board on January 26, 1997, or who subsequently became or becomes
a member of the Board of Directors with the recommendation or approval of a
majority of the Continuing Directors.  Continuing Directors do not include any
Acquiring Person or affiliate or associate of an Acquiring Person.

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

          A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
January 28, 1997.  A copy of the Rights Agreement is available free of charge
from the Company by contacting the Corporate Secretary at Otter Tail Power
Company, 215 South Cascade Street, P.O. Box 496, Fergus Falls, Minnesota 56538-
0496.  This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement, which is
hereby incorporated herein by reference.


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