Document:

<PAGE>   1
EXHIBIT N0. 4(B)

(FACE OF SECURITY)

REGISTERED                                                     REGISTERED
NO. R _________                                             $____________
                                                          CUSIP 743315 AD 5
                                                    SEE REVERSE FOR CERTAIN
                                                                DEFINITIONS

                           THE PROGRESSIVE CORPORATION

                 10-1/8% SUBORDINATED NOTE DUE DECEMBER 15, 2000

                 THE PROGRESSIVE CORPORATION, an Ohio corporation (the
"Issuer"), for value received, hereby promises to pay to
___________________________________ or registered assigns, at the office or
agency of the Issuer at the office of the Trustee in Providence, Rhode Island,
the principal sum of __________________ Dollars on December 15, 2000, in such
coin or currency of the United States of America as at the time of payment shall
be legal tender for the payment of public and private debts, and to pay interest
semiannually on June 15 and December 15 of each year, commencing June 15, 1989,
on said principal sum at said office or agency, in like coin or currency, at the
rate per annum specified in the title of this Note, from the June 15 or the
December 15, as the case may be, next preceding the date of this Note to which
interest has been paid, unless the date hereof is a date to which interest has
been paid, in which case from the date of this Note, or unless no interest has
been paid on these Notes, in which case from December 15, 1988, until payment of
said principal sum has been made or duly provided for; PROVIDED, that payment of
interest may be made at the option of the Issuer by check mailed to the address
of the person entitled thereto as such address shall appear on the Security
Register. Notwithstanding the foregoing, if the date hereof is after the first
day of June or December, as the case may be, and before the following June 15 or
December 15, this Note shall bear interest from such June 15 or December 15;
PROVIDED, that if the Issuer shall default in the payment of interest due on
such June 15 or December 15, then this Note shall bear interest from the next
preceding June 15 or December 15 to which interest has been paid or, if no
interest has been paid on these Notes, from December 15, 1988. The interest so
payable on any June 15 or December 15 will, subject to certain exceptions
provided in the Indenture referred to on the reverse hereof, be paid to the
person in whose name this Note is registered at the close of business on the
June 1 or December 1, as the case may be, next preceding such June 15 or
December 15.

                 Reference is made to the further provisions of this Note set
forth on the reverse hereof. Such further provisions shall for all purposes have
the same effect as though fully set forth at this place.

        This Note shall not be valid or become obligatory for any purpose until
the certificate of authentication hereon shall have been signed by the Trustee
under the Indenture referred to on the reverse hereof.

         IN WITNESS WHEREOF, The Progressive Corporation has caused this
instrument to be signed by facsimile by its duly authorized officers and has
caused a facsimile of its corporate seal to be affixed hereunto or imprinted
hereon.

(CORPORATE SEAL)

                                           THE PROGRESSIVE CORPORATION

Attest:

         /s/ David M. Schneider               By /s/ Peter B. Lewis
        ----------------------             -------------------------------------
               Secretary                   President and Chief Executive Officer

Dated:____________

<PAGE>   2

                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

         This is one of the Securities, of the series designated herein,
referred to in the within-mentioned Indenture.

                                                     Rhode Island Hospital Trust
                                                       National Bank, as Trustee

                                             By.................................
                                                            Authorized Signatory

                               (BACK OF SECURITY)

                           THE PROGRESSIVE CORPORATION

                 10-1/8% SUBORDINATED NOTE DUE DECEMBER 15, 2000

        This Note is one of a duly authorized issue of debentures, notes, bonds
or other evidences of indebtedness of the Issuer (hereinafter called the
"Securities") of the series hereinafter specified, all issued or to be issued
under and pursuant to an indenture dated as of November 15, 1988 (herein called
the "Indenture"), duly executed and delivered by the Issuer to Rhode Island
Hospital Trust National Bank, as Trustee (herein called the "Trustee"), to which
Indenture and all indentures supplemental thereto reference is hereby made for a
description of the rights, limitations of rights, obligations, duties and
immunities thereunder of the Trustee, the Issuer and the holders of the
Securities. The Securities may be issued in one or more series, which different
series may be issued in various aggregate principal amounts, may mature at
different times, may bear interest (if any) at different rates, may be subject
to different redemption provisions (if any), may be subject to different
sinking, purchase or analogous funds (if any) and may otherwise vary as in the
Indenture provided. This Note is one of a series designated as the 10-1/8%
Subordinated Note Due December 15, 2000 of the Issuer, limited in aggregate
principal amount to $150,000,000.

         In case an Event of Default with respect to the 10-1/8% Subordinated
Notes Due December 15, 2000, as defined in the Indenture, shall have occurred
and be continuing, the principal hereof may be declared, and upon such
declaration shall become, due and payable, in the manner, with the effect and
subject to the conditions provided in the Indenture.

         This Note is subordinated to all existing and future Senior
Indebtedness (as defined in the Indenture) of the Issuer. To the extent and in
the manner provided in the Indenture, Senior Indebtedness must be paid before
any payment may be made to any Holders of Securities of any series. Any
Securityholder by accepting this Note agrees to the subordination and authorizes
the Trustee to give it effect.

         In addition to all other rights of Senior Indebtedness described in the
Indenture, the Senior Indebtedness shall continue to be Senior Indebtedness and
entitled to the benefits of the subordination provisions irrespective of any
amendment, modification or waiver of any term of any instrument relating to the
Senior Indebtedness or extension or renewal of the Senior Indebtedness.

         The Indenture contains provisions permitting the Issuer and the
Trustee, with the consent of the Holders of not less than 66-2/3% in aggregate
principal amount of the Securities at the time Outstanding (as defined in the
Indenture) of all series to be affected (voting as one class), evidenced as in
the Indenture provided, to execute supplemental indentures adding any provisions
to or changing in any manner or eliminating any of the provisions of the
Indenture or of any supplemental indenture or modifying in any manner the rights
of the Holders of the Securities of each such series; PROVIDED HOWEVER, that no
such supplemental indenture shall (i) extend the final maturity of any Security,
or reduce the principal amount thereof or any premium thereon, or reduce the
rate or extend the time of payment of any interest thereon, or

<PAGE>   3

impair or affect the rights of any Holder to institute suit for the payment
thereof, or make any change in the subordination provisions that adversely
affects the rights of any Holder, in each case, without the consent of the
Holder of each Security so affected or (ii) reduce the aforesaid percentage of
Securities, the Holders of which are required to consent to any such
supplemental indenture, without the consent of the Holder of each Security
affected. It is also provided in the Indenture that, with respect to certain
defaults or Events of Default regarding the Securities of any series, prior to
any declaration accelerating the maturity of such Securities, the Holders of a
majority in aggregate principal amount Outstanding of the Securities of such
series (or, in the case of certain defaults or Events of Default, all or certain
series of the Securities) may on behalf of the Holders of all the Securities of
such series (or all or certain series of the Securities, as the case may be)
waive any such past default or Event of Default and its consequences. The
preceding sentence shall not, however, apply to a default in the payment of the
principal of or premium, if any, or interest on any of the Securities. Any such
consent or waiver by the Holder of this Note (unless revoked as provided in the
Indenture) shall be conclusive and binding upon such Holder and upon all future
Holders and owners of this Note and any Note which may be issued in exchange or
substitution herefor, irrespective of whether or not any notation thereof is
made upon this Note or such other Note.

         No reference herein to the Indenture and no provision of this Note or
of the Indenture shall alter or impair the obligation of the Issuer, which is
absolute and unconditional, to pay the principal of and interest on this Note in
the manner, at the respective times, at the rate and in the coin or currency
herein prescribed.

         The Notes are issuable in registered form without coupons in
denominations of $1,000 and any integral multiples of $1,000 at the office or
agency of the Issuer at the office of the Trustee in Providence, Rhode Island,
and in the manner and subject to the limitations provided in the Indenture, but
without the payment of any service charge, Notes may be exchanged for a like
aggregate principal amount of Notes of other authorized denominations.

         The Notes are not subject to redemption at the option of the Issuer or
through the operation of a sinking fund.

         Upon due presentment for registration of transfer of this Note at the
office or agency of the Issuer or at the office of the Trustee in Providence,
Rhode Island, a new Note or Notes of authorized denominations for an equal
aggregate principal amount will be issued to the transferee in exchange
therefor, subject to the limitations provided in the Indenture, without charge
except for any tax or other governmental charge imposed in connection therewith.

         The Issuer, the Trustee and any authorized agent of the Issuer or the
Trustee may deem and treat the registered Holder hereof as the absolute owner of
this Note (whether or not this Note shall be overdue and notwithstanding any
notation of ownership or other writing hereon), for the purpose of receiving
payment of, or on account of, the principal hereof and, subject to the
provisions on the face hereof, interest hereon, and for all other purposes, and
neither the Issuer nor the Trustee nor any authorized agent of the Issuer or the
Trustee shall be affected by any notice to the contrary.

         No recourse under or upon any obligation, covenant or agreement of the
Issuer in the Indenture or any indenture supplemental thereto or in any Note, or
because of the creation of any indebtedness represented thereby, shall be had
against any incorporator, shareholder, officer or director, as such, of the
Issuer or of any successor corporation, either directly or through the Issuer or
any successor corporation, under any rule of law, statute or constitutional
provision or by the enforcement of any assessment or by any legal or equitable
proceeding or otherwise, all such liability being expressly waived and released
by the acceptance hereof and as part of the consideration for the issue hereof.

         Terms used herein which are defined in the Indenture shall have the
respective meanings assigned thereto in the Indenture.

<PAGE>   4

                            ------------------------
                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

       TEN COM                 -              as tenants in common
       TEN ENT                 -              as tenants by the entireties
       CUST                    -              Custodian
       JT TEN                  -              as joint tenants with right of
                                              survivorship and not as tenants
                                              in common
       UNIF GIFT MIN ACT       -              __(Cust)___Custodian __(Minor)
                                              under Uniform Gifts to Minors Act

                                              ---------------------------------
                                                            (State)

     Additional abbreviations may also be used though not in the above list.

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

  FOR VALUE RECEIVED the undersigned hereby sell(s), assign(s) and transfer(s)
                                      unto

                     PLEASE INSERT SOCIAL SECURITY OR OTHER
                         IDENTIFYING NUMBER OF ASSIGNEE

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

--------------------------------------------------------------------------------
     Please print or typewrite name and address including postal zip code of
                                    assignee

--------------------------------------------------------------------------------
                         the within Note and all rights
           thereunder, hereby irrevocably constituting and appointing

--------------------------------------------------------------------------------
               attorney to transfer said Note on the books of the
            Issuer, with full power of substitution in the premises.

Date:
     -------------------             -------------------------------------------
                                     NOTICE: The signature to this assignment
                                     must correspond with the name as written
                                     upon the face of the within instrument in
                                     every particular, without alteration or
                                     enlargement or any change whatever.<PAGE>   1

EXHIBIT NO. 4(C)

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

                           THE PROGRESSIVE CORPORATION

                                       AND

                       THE FIRST NATIONAL BANK OF BOSTON,
                                                   Trustee

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

                                    INDENTURE

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

                          Dated as of November 15, 1988

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

<PAGE>   2

                             CROSS REFERENCE SHEET*

                                     Between

         Provisions of Trust Indenture Act of 1939 and Indenture to be dated as
of November 15, 1988 between THE PROGRESSIVE CORPORATION and THE FIRST NATIONAL
BANK OF BOSTON, Trustee:

Section of the Act                                    Section of Indenture
- - - ------------------                              --------------------

310(a)(1) and (2) . . . . . . . . . . . . . . . . .   6.9
310(a)(3) and (4) . . . . . . . . . . . . . . . . .   Inapplicable
310(b)  . . . . . . . . . . . . . . . . . . . . . .   6.8 and 6.10(a), (b)
                                                      and (d)
310(c)  . . . . . . . . . . . . . . . . . . . . . .   Inapplicable
311(a)  . . . . . . . . . . . . . . . . . . . . . .   6.13(a) and (c)(1)
                                                      and (2)
311(b)  . . . . . . . . . . . . . . . . . . . . . .   6.13(b)
311(c)  . . . . . . . . . . . . . . . . . . . . . .   Inapplicable
312(a)  . . . . . . . . . . . . . . . . . . . . . .   4.1 and 4.2(a)
312(b)  . . . . . . . . . . . . . . . . . . . . . .   4.2(a) and (b)(i)
                                                      and (ii)
312(c)  . . . . . . . . . . . . . . . . . . . . . .   4.2(c)
313(a)  . . . . . . . . . . . . . . . . . . . . . .   4.4(a)(i), (ii), (iii),
                                                      (iv), (v) and (vi)
313(b)(1) . . . . . . . . . . . . . . . . . . . . .   Inapplicable
313(b)(2) . . . . . . . . . . . . . . . . . . . . .   4.4
313(c)  . . . . . . . . . . . . . . . . . . . . . .   4.4
313(d)  . . . . . . . . . . . . . . . . . . . . . .   4.4
314(a)  . . . . . . . . . . . . . . . . . . . . . .   4.3
314(b)  . . . . . . . . . . . . . . . . . . . . . .   Inapplicable
314(c)(1) and (2) . . . . . . . . . . . . . . . . .   11.5
314(c)(3) . . . . . . . . . . . . . . . . . . . . .   Inapplicable
314(d)  . . . . . . . . . . . . . . . . . . . . . .   Inapplicable
314(e)  . . . . . . . . . . . . . . . . . . . . . .   11.5
314(f)  . . . . . . . . . . . . . . . . . . . . . .   Inapplicable
315(a), (c) and (d) . . . . . . . . . . . . . . . .   6.1
315(b)  . . . . . . . . . . . . . . . . . . . . . .   5.11
315(e)  . . . . . . . . . . . . . . . . . . . . . .   5.12
316(a)(1) . . . . . . . . . . . . . . . . . . . . .   5.9
316(a)(2) . . . . . . . . . . . . . . . . . . . . .   Not Required
316(a) (last sentence)  . . . . . . . . . . . . . .   7.4
316(b)  . . . . . . . . . . . . . . . . . . . . . .   5.7
317(a)  . . . . . . . . . . . . . . . . . . . . . .   5.2
317(b)  . . . . . . . . . . . . . . . . . . . . . .   3.4(a) and (b)
318(a)  . . . . . . . . . . . . . . . . . . . . . .   11.7

* This Cross Reference Sheet is not part of the Indenture.

<PAGE>   3

                                TABLE OF CONTENTS

                                                                         PAGE
                                                                         ----

PARTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
RECITALS:

     Authorization of Indenture   . . . . . . . . . . . . . . . . . . . .  1
     Compliance with Legal Requirements   . . . . . . . . . . . . . . . .  1
     Purpose of and Consideration for Indenture   . . . . . . . . . . . .  1

                                   ARTICLE ONE

                                   DEFINITIONS

SECTION  1.1.          Certain Terms Defined  . . . . . . . . . . . . . .  1
                       Authorized Newspaper   . . . . . . . . . . . . . .  2
                       Board of Directors   . . . . . . . . . . . . . . .  2
                       Business Day   . . . . . . . . . . . . . . . . . .  2
                       Commission   . . . . . . . . . . . . . . . . . . .  2
                       Corporate Trust Office   . . . . . . . . . . . . .  2
                       Coupon   . . . . . . . . . . . . . . . . . . . . .  2
                       ECU  . . . . . . . . . . . . . . . . . . . . . . .  3
                       European Communities   . . . . . . . . . . . . . .  3
                       Event of Default   . . . . . . . . . . . . . . . .  3
                       Foreign Currency   . . . . . . . . . . . . . . . .  3
                       Holder, holder of Securities, Securityholder   . .  3
                       Indenture  . . . . . . . . . . . . . . . . . . . .  3
                       Interest   . . . . . . . . . . . . . . . . . . . .  3
                       Issuer   . . . . . . . . . . . . . . . . . . . . .  3
                       Officers' Certificate  . . . . . . . . . . . . . .  3
                       Opinion of Counsel   . . . . . . . . . . . . . . .  3
                       Original Issue date  . . . . . . . . . . . . . . .  4
                       Original Issue Discount Securities   . . . . . . .  4
                       Outstanding  . . . . . . . . . . . . . . . . . . .  4
                       Person   . . . . . . . . . . . . . . . . . . . . .  5
                       principal  . . . . . . . . . . . . . . . . . . . .  5
                       Registered Security  . . . . . . . . . . . . . . .  5
                       Responsible Officer  . . . . . . . . . . . . . . .  5
                       Security or Securities   . . . . . . . . . . . . .  5
                       Trustee  . . . . . . . . . . . . . . . . . . . . .  5
                       Trust Indenture Act of 1939  . . . . . . . . . . .  5
                       Unregistered Security  . . . . . . . . . . . . . .  5

<PAGE>   4

                                       ii

                                                                            PAGE
                                                                            ----

              U.S. Government Obligations  . . . . . . . . . . . . . . . . .  5
              Vice President   . . . . . . . . . . . . . . . . . . . . . . .  5
              Yield to Maturity  . . . . . . . . . . . . . . . . . . . . . .  5

                                   ARTICLE TWO

                                   SECURITIES

SECTION 2.1.  Forms Generally  . . . . . . . . . . . . . . . . . . . . . . .  6
SECTION 2.2.  Form of Trustee's Certificate of Authentication  . . . . . . .  6
SECTION 2.3.  Amount Unlimited; Issuable in Series   . . . . . . . . . . . .  7
SECTION 2.4.  Authentication and Delivery of Securities  . . . . . . . . . .  9
SECTION 2.5.  Execution of Securities  . . . . . . . . . . . . . . . . . . . 10
SECTION 2.6.  Certificate of Authentication  . . . . . . . . . . . . . . . . 11
SECTION 2.7.  Denomination and Date of Securities; Payments of
                Interest   . . . . . . . . . . . . . . . . . . . . . . . . . 11
SECTION 2.8.  Registration, Transfer and Exchange  . . . . . . . . . . . . . 13
SECTION 2.9.  Mutilated, Defaced, Destroyed, Lost and Stolen
                Securities   . . . . . . . . . . . . . . . . . . . . . . . . 16
SECTION 2.10. Cancellation of Securities; Destruction Thereof  . . . . . . . 17
SECTION 2.11. Temporary Securities   . . . . . . . . . . . . . . . . . . . . 17

                                  ARTICLE THREE

                             COVENANTS OF THE ISSUER

SECTION 3.1.  Payment of Principal and Interest  . . . . . . . . . . . . . . 18
SECTION 3.2.  Offices for Payments, etc.   . . . . . . . . . . . . . . . . . 19
SECTION 3.3.  Appointment to Fill a Vacancy in the Office of Trustee   . . . 20
SECTION 3.4.  Paying Agents  . . . . . . . . . . . . . . . . . . . . . . . . 20
SECTION 3.5.  Written Statement to Trustee   . . . . . . . . . . . . . . . . 21
SECTION 3.6.  Luxembourg Publications  . . . . . . . . . . . . . . . . . . . 21

                                  ARTICLE FOUR

                   SECURITYHOLDERS' LISTS AND REPORTS BY THE
                             ISSUER AND THE TRUSTEE

SECTION 4.1.  Issuer to Furnish Trustee Information as to Names and
                Addresses of Securityholders   . . . . . . . . . . . . . . . 22
SECTION 4.2.  Preservation and Disclosure of Securityholders'
                Lists . . . . . . . . . . . . . . . . . . . . . . . .  . . . 22
SECTION 4.3.  Reports by the Issuer  . . . . . . . . . . . . . . . . . . . . 24
SECTION 4.4.  Reports by the Trustee   . . . . . . . . . . . . . . . . . . . 25

<PAGE>   5

                                       iii

                                  ARTICLE FIVE

                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT

                                                                            PAGE
                                                                            ----

SECTION 5.1.  Event of Default Defined; Acceleration of Maturity;
                Waiver of Default . . . . . . . . . . . . . . . . . .  .  .  27
SECTION 5.2.  Collection of Indebtedness by Trustee; Trustee May
                Prove Debt   . . . . . . . . . . . . . . . . . . . . . . . . 30
SECTION 5.3.  Application of Proceeds  . . . . . . . . . . . . . . . . . . . 33
SECTION 5.4.  Suits for Enforcement  . . . . . . . . . . . . . . . . . . . . 34
SECTION 5.5.  Restoration of Rights on Abandonment of
                Proceedings . . . . . . . . . . . . . . . . . . . . .  . . . 34
SECTION 5.6.  Limitations on Suits by Securityholders  . . . . . . . . . . . 35
SECTION 5.7.  Unconditional Right of Securityholders to Institute
                Certain Suits . . . . . . . . . . . . . . . . . . . .  . . . 36
SECTION 5.8.  Powers and Remedies Cumulative; Delay or Omission
                Not Waiver of Default . . . . . . . . . . . . . . . . .  . . 36
SECTION 5.9.  Control by Securityholders   . . . . . . . . . . . . . . . . . 36
SECTION 5.10. Waiver of Past Defaults  . . . . . . . . . . . . . . . . . . . 37
SECTION 5.11. Trustee to Give Notice of Default, But May Withhold
                in Certain Circumstances   . . . . . . . . . . . . . . . . . 38
SECTION 5.12. Right of Court to Require Filing of Undertaking to Pay
                Costs    . . . . . . . . . . . . . . . . . . . . . . . . . . 38

                                   ARTICLE SIX

                             CONCERNING THE TRUSTEE

SECTION 6.1.  Duties and Responsibilities of the Trustee; During
                Default; Prior to Default  . . . . . . . . . . . . . . . . . 39
SECTION 6.2.  Certain Rights of the Trustee  . . . . . . . . . . . . . . . . 40
SECTION 6.3.  Trustee Not Responsible for Recitals, Disposition of
                Securities or Application of Proceeds Thereof  . . . . . . . 42
SECTION 6.4.  Trustee and Agents May Hold Securities or Coupons;
                Collections, etc.  . . . . . . . . . . . . . . . . . . . . . 42
SECTION 6.5.  Moneys Held by Trustee   . . . . . . . . . . . . . . . . . . . 42
SECTION 6.6.  Compensation and Indemnification of Trustee and Its
                Prior Claim . . . . . . . . . . . . . . . . . . . . .  . . . 43
SECTION 6.7.  Right of Trustee to Rely on Officers' Certificate,
                etc.   . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
SECTION 6.8.  Qualification of Trustee; Conflicting Interests  . . . . . . . 44
SECTION 6.9.  Persons Eligible for Appointment as Trustee  . . . . . . . . . 50

<PAGE>   6

                                       iv

                                                                            PAGE
                                                                            ----

SECTION 6.10.  Resignation and Removal; Appointment of Successor
                 Trustee  . . . . . . . . . . . . . . . . . . . . . . . . .  51
SECTION 6.11.  Acceptance of Appointment by Successor Trustee   . . . . . .  52
SECTION 6.12.  Merger, Conversion, Consolidation or Succession to
                 Business of Trustee  . . . . . . . . . . . . . . . . . . .  54
SECTION 6.13.  Preferential Collection of Claims Against the
                 Issuer   . . . . . . . . . . . . . . . . . . . . . . . . .  54

                                  ARTICLE SEVEN

                         CONCERNING THE SECURITYHOLDERS

SECTION 7.1.   Evidence of Action Taken by Securityholders  . . . . . . . .  59
SECTION 7.2.   Proof of Execution of Instruments and of Holding of
                 Securities   . . . . . . . . . . . . . . . . . . . . . . .  59
SECTION 7.3.   Holders to be Treated as Owners  . . . . . . . . . . . . . .  60
SECTION 7.4.   Securities Owned by Issuer Deemed Not Outstanding  . . . . .  61
SECTION 7.5.   Right of Revocation of Action Taken  . . . . . . . . . . . .  62

                                  ARTICLE EIGHT

                             SUPPLEMENTAL INDENTURES

SECTION 8.1.   Supplemental Indentures Without Consent of Security-
                 holders  . . . . . . . . . . . . . . . . . . . . . . . . .  62
SECTION 8.2.   Supplemental Indentures With Consent of Securityholders  . .  64
SECTION 8.3.   Effect of Supplemental Indenture   . . . . . . . . . . . . .  65
SECTION 8.4.   Documents to Be Given to Trustee   . . . . . . . . . . . . .  66
SECTION 8.5.   Notation on Securities in Respect of Supplemental Indentures  66

                                  ARTICLE NINE

                    CONSOLIDATION, MERGER, SALE OR CONVEYANCE

SECTION 9.1.   Issuer May Consolidate, etc., on Certain Terms   . . . . . .  66
SECTION 9.2.   Successor Corporation Substituted  . . . . . . . . . . . . .  67
SECTION 9.3.   Opinion of Counsel to Trustee  . . . . . . . . . . . . . . .  68

<PAGE>   7

                                        v

                                   ARTICLE TEN

            SATISFACTION AND DISCHARGE OF INDENTURE; UNCLAIMED MONEYS

<TABLE>
<CAPTION>

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                                                                                     ----

<S>                                                                                 <C>
SECTION 10.1.  Satisfaction and Discharge of Indenture  . . . . . . . . . . . . . .   68
SECTION 10.2.  Application by Trustee of Funds Deposited for Payment of Securities    71
SECTION 10.3.  Repayment of Moneys Held by Paying Agent   . . . . . . . . . . . . .   71
SECTION 10.4.  Return of Moneys Held By Trustee and Paying Agent Unclaimed for
               Two Years  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   71
SECTION 10.5.  Indemnity for U.S. Government Obligations  . . . . . . . . . . . . .   72

                                 ARTICLE ELEVEN

                            MISCELLANEOUS PROVISIONS

SECTION 11.1.  Incorporators, Shareholders, Officers and Directors of
                 Issuer Exempt from Individual Liability  . . . . . . . . . . . . .   72
SECTION 11.2.  Provisions of Indenture for the Sole Benefit of Parties
                 and Securityholders  . . . . . . . . . . . . . . . . . . . . . . .   73
SECTION 11.3.  Successors and Assigns of Issuer Bound by Indenture  . . . . . . . .   73
SECTION 11.4.  Notices and Demands on Issuer, Trustee and Securityholders   . . . .   73
SECTION 11.5.  Officers' Certificates and Opinions of Counsel; Statements
                 to Be Contained Therein  . . . . . . . . . . . . . . . . . . . . .   74
SECTION 11.6.  Payments Due on Saturdays, Sundays and Holidays .  . . . . . . . . .   75
SECTION 11.7.  Conflict of Any Provision of Indenture with Trust
                 Indenture Act of 1939  . . . . . . . . . . . . . . . . . . . . . .   75
SECTION 11.8.  New York Law to Govern   . . . . . . . . . . . . . . . . . . . . . .   76
SECTION 11.9.  Counterparts   . . . . . . . . . . . . . . . . . . . . . . . . . . .   76
SECTION 11.10. Effect of Headings   . . . . . . . . . . . . . . . . . . . . . . . .   76
SECTION 11.11. Securities in Foreign Currencies or in ECU   . . . . . . . . . . . .   76

                                 ARTICLE TWELVE

                   REDEMPTION OF SECURITIES AND SINKING FUNDS

SECTION 12.1.  Applicability of Article   . . . . . . . . . . . . . . . . . . . . .   76
SECTION 12.2.  Notice of Redemption; Partial Redemptions  . . . . . . . . . . . . .   77
SECTION 12.3.  Payment of Securities Called for Redemption  . . . . . . . . . . . .   78
SECTION 12.4.  Exclusion of Certain Securities from Eligibility for
                 Selection for Redemption   . . . . . . . . . . . . . . . . . . . .   79
SECTION 12.5.  Mandatory and Optional Sinking Funds   . . . . . . . . . . . . . . .   80

</TABLE>

<PAGE>   8

                                       vi

TESTIMONIUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  84
SIGNATURES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  84
ACKNOWLEDGMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  85

<PAGE>   9

       THIS INDENTURE, dated as of November 15, 1988, between THE PROGRESSIVE
CORPORATION, an Ohio corporation (the "Issuer"), and THE FIRST NATIONAL BANK OF
BOSTON, a national banking association (the "Trustee"),

                                   WITNESSETH:

         WHEREAS, the Issuer has duly authorized the issue from time to time of
its unsecured debentures, notes or other evidences of indebtedness to be issued
in one or more series (the "Securities") up to such principal amount or amounts
as may from time to time be authorized in accordance with the terms of this
Indenture and to provide, among other things, for the authentication, delivery
and administration thereof, the Issuer has duly authorized the execution and
delivery of this Indenture; and

         WHEREAS, all things necessary to make this Indenture a valid indenture
and agreement according to its terms have been done;

         NOW, THEREFORE:

         In consideration of the premises and the purchases of the Securities by
the holders thereof, the Issuer and the Trustee mutually covenant and agree for
the equal and proportionate benefit of the respective holders from time to time
of the Securities and of the Coupons, if any, appertaining thereto as follows:

                                   ARTICLE ONE

                                   DEFINITIONS

         SECTION 1.1 Certain Terms Defined. The following terms (except as
otherwise expressly provided or unless the content otherwise clearly requires)
for all purposes of this Indenture and of any indenture supplemental hereto
shall have the respective meanings specified in this Section. All other terms
used in this Indenture that are defined in the Trust Indenture Act of 1939 or
the definitions of which in the Securities Act of 1933 are referred to in the
Trust Indenture Act of 1939, including terms defined therein by reference to the
Securities Act of 1933 (except as herein otherwise expressly provided or unless
the content otherwise clearly requires), shall have the meanings assigned to
such terms in said Trust Indenture Act and in said Securities Act as in force at
the date of this Indenture. All accounting terms used herein and not expressly
defined shall have the meanings assigned to such terms in accordance with
generally accepted accounting principles, and the term "GENERALLY ACCEPTED
ACCOUNTING PRINCIPLES" means such accounting principles as

<PAGE>   10

                                        2

are generally accepted at the time of any computation. The words "herein",
"hereof" and "hereunder" and other words of similar import refer to this
Indenture as a whole and not to any particular Article, Section or other
subdivision. The terms defined in this Article have the meanings assigned to
them in this Article and include the plural as well as the singular.

         "Authorized Newspaper" means a newspaper (which, in the case of the
United Kingdom, will, if practicable, be the Financial Times (London Edition)
and, in the case of Luxembourg, will, if practicable, be the Luxemburger Wort)
published in English or an official language of the country of publication
customarily published at least once a day for at least five days in each
calendar week and of general circulation in the United Kingdom or in Luxembourg,
as applicable. If it shall be impractical in the opinion of the Trustee to make
any publication of any notice required hereby in an Authorized Newspaper, any
publication or other notice in lieu thereof which is made or given with the
approval of the Trustee shall constitute a sufficient publication of such
notice.

         "Board of Directors" means either the Board of Directors of the Issuer
or any committee of such Board duly authorized to act hereunder.

         "Business Day" means, with respect to any Security, a day that in the
city (or in any of the cities, if more than one) in which amounts are payable,
as specified in the form of such Security, is not a day on which banking
institutions are authorized by law or regulation to close or a day on which
transactions in the currency in which the Securities are payable are not
conducted.

         "Commission" means the Securities and Exchange Commission, as from time
to time constituted, created under the Securities Exchange Act of 1934, or if at
any time after the execution and delivery of this Indenture such Commission is
not existing and performing the duties now assigned to it under the Trust
Indenture Act, then the body performing such duties on such date.

         "Corporate Trust Office" means the office of the Trustee at which the
corporate trust business of the Trustee shall, at any particular time, be
principally administered, which office is, at the date as of which this
Indenture is dated, located at 100 Federal Street, Boston, Massachusetts 02110,
Attn: Corporate Trust Administration.

         "Coupon" means any interest coupon appertaining to a Security.

<PAGE>   11

                                        3

         "ECU" means the European Currency Unit as defined and revised from time
to time by the council of European Communities.

         "European Communities" means the European Economic Community (the
"EEC"), the European Coal and Steel Community and Euratom.

         "Event of Default" means any event or condition specified as such in
Section 5.1.

         "Foreign Currency" means a currency issued by the government of a
country other than the United States.

         "Holder," "holder of Securities," "Securityholder" or other similar
terms mean (a) in the case of any Registered Security, the Person in whose name
such Security is registered in the security register kept by the Issuer for that
purpose in accordance with the terms hereof, and (b) in the case of any
Unregistered Security, the bearer of such Security, or any Coupon appertaining
thereto, as the case may be.

         "Indenture" means this instrument as originally executed and delivered
or, if amended or supplemented as herein provided, as so amended or supplemented
or both, and shall include the forms and terms of particular series of
Securities established as contemplated hereunder.

         "Interest" means, when used with respect to non-interest bearing
Securities, interest payable after maturity.

         "Issuer" means (except as otherwise provided in Article Six) THE
PROGRESSIVE CORPORATION, an Ohio corporation, and, subject to Article Nine, its
successors and assigns.

         "Officers' Certificate" means a certificate signed by the chairman of
the Board of Directors or the president or any vice president or by the
treasurer and by the secretary or any assistant secretary of the Issuer and
delivered to the Trustee. Each such certificate shall include the statements
provided for in Section 11.5.

         "Opinion of Counsel" means an opinion in writing signed by legal
counsel who may be an employee of or counsel to the Issuer or other counsel who
shall be satisfactory to the Trustee. Each such opinion shall include the
statements provided for in Section 11.5, if and to the extent required hereby.

<PAGE>   12

                                        4

         "Original issue date" of any Security (or portion thereof) means the
earlier of (a) the date of such Security or (b) the date of any Security (or
portion thereof) for which such Security was issued (directly or indirectly) on
registration of transfer, exchange or substitution.

         "Original Issue Discount Security" means any Security that provides for
an amount less than the principal amount thereof to be due and payable upon a
declaration of acceleration of the maturity thereof pursuant to Section 5.1.

         "Outstanding" (except as otherwise provided in Section 6.8), when used
with reference to Securities, subject to the provisions of Section 7.4, means,
as of any particular time, all Securities authenticated and delivered by the
Trustee under this Indenture, except

                 (a) Securities theretofore cancelled by the Trustee or
         delivered to the Trustee for cancellation;
                 (b) Securities, or portions thereof, for the payment or
         redemption of which moneys in the necessary amount shall have been
         deposited in trust with the Trustee or with any paying agent (other
         than the Issuer) or shall have been set aside, segregated and held in
         trust by the Issuer for the holders of such Securities (if the Issuer
         shall act as its own paying agent), provided that if such Securities,
         or portions thereof, are to be redeemed prior to the maturity thereof,
         notice of such redemption shall have been given as herein provided or
         provision satisfactory to the Trustee shall have been made for giving
         such notice; and
                 (c) Securities in substitution for which other Securities shall
         have been authenticated and delivered, or which shall have been paid,
         pursuant to the terms of Section 2.9 (except with respect to any such
         Security as to which proof satisfactory to the Trustee is presented
         that such Security is held by a person in whose hands such Security is
         a legal, valid and binding obligation of the Issuer).

         In determining whether the holders of the requisite principal amount of
Outstanding Securities of any or all series have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, the principal
amount of an Original Issue Discount Security that shall be deemed to be
Outstanding for such purposes shall be the amount of the principal thereof that
would be due and payable as of the date of such determination upon a declaration
of acceleration of the maturity thereof pursuant to Section 5.1.

<PAGE>   13

                                        5

         "Person" means any individual, corporation, partnership, joint venture,
association, joint stock company, trust, unincorporated organization or
government or any agency or political subdivision thereof.

         "Principal" whenever used with reference to the Securities or any
Security or any portion thereof, shall be deemed to include "and premium, if
any."

         "Registered Security" means any Security registered on the Security
Register of the Issuer.

         "Responsible Officer" when used with respect to the Trustee means any
officer or assistant officer assigned by the Trustee to administer its corporate
trust matters.

         "Security" or "Securities" (except as otherwise provided in Section
6.8) has the meaning stated in the first recital of this Indenture, or, as the
case may be, Securities that have been authenticated and delivered under this
Indenture.

         "Trustee" means the Person identified as "Trustee" in the first
paragraph hereof and, subject to the provisions of Article Six, shall also
include any successor trustee.

         "Trust Indenture Act of 1939" (except as otherwise provided in Sections
8.1 and 8.2) means the Trust Indenture Act of 1939 as in force at the date as of
which this Indenture was originally executed.

         "Unregistered Security" means any Security other than a Registered
Security.

         "U.S. Government Obligations" means direct obligations of the United
States of America, backed by its full faith and credit.

         "Vice President," when used with respect to the Issuer, means any vice
president, whether or not designated by a number or a word or words added before
or after the title of "vice president".

         "Yield to Maturity" means the yield to maturity on a series of
securities, calculated at the time of issuance of such series, or, if
applicable, at the most recent redetermination of interest on such series, and
calculated in accordance with accepted financial practice.

<PAGE>   14

                                        6

                                   ARTICLE TWO

                                   SECURITIES

         SECTION 2.1 Forms Generally. The Securities of each series and the
Coupons, if any, to be attached thereto shall be substantially in such form (not
inconsistent with this Indenture) as shall be established by or pursuant to a
resolution of the Board of Directors or in one or more indentures supplemental
hereto, in each case with such appropriate insertions, omissions, substitutions
and other variations as are required or permitted by this Indenture and may have
imprinted or otherwise reproduced thereon such legend or legends, not
inconsistent with the provisions of this Indenture, as may be required to comply
with any law or with any rules or regulations pursuant thereto, or with any
rules of any securities exchange or to conform to general usage, all as may be
determined by the officers executing such Securities and Coupons, as evidenced
by their execution of the Securities and Coupons.

         The definitive Securities and Coupons shall be printed, lithographed or
engraved on steel engraved borders or may be produced in any other manner, all
as determined by the officers executing such Securities and Coupons, as
evidenced by their execution of such Securities and Coupons.

         SECTION 2.2 Form of Trustee's Certificate of Authentication. The
Trustee's certificate of authentication on all Securities shall be in
substantially the following form:

         This is one of the Securities, of the series designated herein,
referred to in the within-mentioned Indenture.

                                          TRUSTEE,

                                                 as Trustee

                                        By
                                           ------------------------------------

                                                  Authorized Signatory

<PAGE>   15

                                        7

         SECTION 2.3 Amount Unlimited; Issuable in Series. The aggregate
principal amount of Securities which may be authenticated and delivered under
this Indenture is unlimited.

         The Securities may be issued in one or more series. There shall be
established in or pursuant to a resolution of the Board of Directors and set
forth in an Officers' Certificate, or established in one or more indentures
supplemental hereto, prior to the issuance of Securities of any series,

                 (1) the title of the Securities of the series (which shall
         distinguish the Securities of the series from all other Securities);

                 (2) any limit upon the aggregate principal amount of the
         Securities of the series that may be authenticated and delivered under
         this Indenture (except for Securities authenticated and delivered upon
         registration of transfer of, or in exchange for, or in lieu of, other
         Securities of the series pursuant to Section 2.8, 2.9, 2.11 or 12.3);

                 (3) the date or dates on which the principal of the Securities
         of the series is payable or the method by which such date or dates
         shall be determined;

                 (4) the rate or rates at which the Securities of the series
         shall bear interest, if any, or the method by which such rate shall be
         determined, the date or dates from which such interest shall accrue,
         the interest payment dates on which such interest shall be payable and
         the record dates for the determination of Holders to whom interest is
         payable;

                 (5) the place or places where the principal and any interest
         on Securities of the series shall be payable;

                 (6) the price or prices at which, the period or periods within
         which and the terms and conditions upon which Securities of the series
         may be redeemed, in whole or in part, at the option of the Issuer,
         pursuant to any sinking fund or otherwise;

                 (7) the obligation, if any, of the Issuer to redeem, purchase
         or repay Securities of the series pursuant to any sinking fund or
         analogous provisions or at the option of a Holder thereof and the price
         or prices at which and the period or periods within which and the terms
         and conditions upon which Securities of the series shall be redeemed,
         purchased or repaid, in whole or in part, pursuant to such obligation;

<PAGE>   16

                                        8

                 (8) if other than denominations of U.S. $1,000 and any
         integral multiple thereof, in the case of Registered Securities, or
         U.S. $1,000 in the case of Unregistered Securities, the denominations
         in which Securities of the series shall be issuable;

                 (9) if other than the principal amount thereof, the portion of
         the principal amount of Securities of the series which shall be payable
         upon declaration of acceleration of the maturity thereof pursuant to
         Section 5.1 or provable in bankruptcy pursuant to Section 5.2;

                 (10) any authenticating or paying agents, transfer agents or
         registrars or any other agents with respect to the Securities of such
         series;

                 (11) if other than such coin or currency of the United States
         of America as at the time of payment is legal tender for payment of
         public or private debts, the coin or currency or units based on or
         relating to currencies (including ECU) in which payment of the
         principal of and interest, if any, on the Securities of that series
         shall be payable;

                 (12) if the principal of or interest, if any, on the Securities
         of that series are to be payable, at the election of the Issuer or a
         holder thereof, in a coin or currency or units based on or relating to
         currencies (including ECU) other than that in which the Securities are
         stated to be payable, the period or periods within which, and the terms
         and conditions upon which, such election may be made;

                 (13) if the amount of payments of principal of or interest, if
         any, on the Securities of the series may be determined with reference
         to an index, formula or other method based on a coin or currency or
         units based on or relating to currencies (including ECU) other than
         that in which the Securities are stated to be payable, the manner in
         which such amounts shall be determined;

                 (14) whether the Securities of the series will be issuable as
         Registered Securities or Unregistered Securities (with or without
         Coupons), or both, any restrictions applicable to the offer, sale or
         delivery of Unregistered Securities and, if other than as provided in
         Section 2.8, the terms upon which Unregistered Securities and, of any
         series may be exchanged for Registered Securities of such series and
         vice versa;

<PAGE>   17

                                        9

                 (15) whether and under what circumstances the Issuer will pay
         additional amounts on the Securities of the series held by a Person who
         is not a U.S. person in respect of any tax, assessment or governmental
         charge withheld or deducted and, if so, whether the Issuer will have
         the option to redeem such Securities rather than pay such additional
         amounts;

                 (16) if the Securities of such series are to be issuable in
         definitive form (whether upon original issue or upon exchange of a
         temporary Security of such series) only upon receipt of certain
         certificates or other documents or satisfaction of other conditions not
         otherwise set forth herein, then the form and terms of such
         certificates, documents or conditions; and

                 (17) any other terms of the series, including provisions for
         payment by wire transfers, if any, or modifications of the definition
         of Business Day (which terms shall not adversely affect the interests
         of the Holders of the Securities).

         All Securities of any one series shall be substantially identical
except as to denomination and except as may otherwise be provided in or pursuant
to such resolution of the Board of Directors or in any such indenture
supplemental hereto.

         SECTION 2.4 Authentication and Delivery of Securities. At any time and
from time to time after the execution and delivery of this Indenture, the Issuer
may deliver Securities of any series (having attached thereto appropriate
Coupons, if any), executed by the Issuer to the Trustee for authentication, and
the Trustee shall thereupon authenticate and deliver such Securities and
Coupons, if any, to or upon the written order of the Issuer, signed by both (a)
the chairman of its Board of Directors, or any vice chairman of its Board of
Directors, or its president or any vice president or its treasurer or any
assistant treasurer and (b) by its secretary or any assistant secretary, without
any further action by the Issuer. In authenticating such Securities and Coupons,
if any, and accepting the additional responsibilities under this Indenture in
relation to such Securities and Coupons, if any, the Trustee shall be entitled
to receive, and (subject to Section 6.1) shall be fully protected in relying
upon:

                 (1) a copy of any resolution or resolutions of the Board of
         Directors by or pursuant to which the form and term of such series

<PAGE>   18

                                       10

         were established in each case certified by the secretary or an
         assistant secretary of the Issuer;

                 (2) an executed supplemental indenture, if any;

                 (3) an Officers' Certificate setting forth the form and terms
         of the Securities and Coupons, if any, as required pursuant to Section
         2.3, and prepared in accordance with Section 11.5;

                 (4) an Opinion of Counsel, prepared in accordance with Section
         11.5, which shall state

                         (a) that the form or forms and terms of such Securities
                 and Coupons, if any, have been established by or pursuant to a
                 resolution of the Board of Directors or by a supplemental
                 indenture as permitted by Section 2.1 and 2.3 in conformity
                 with the provisions of this Indenture;

                         (b) that such Securities and Coupons, if any, when
                 authenticated and delivered by the Trustee and issued by the
                 issuer in the manner and subject to any conditions specified in
                 such Opinion of Counsel, will constitute valid and binding
                 obligations of the Issuer;

                         (c) that all laws and requirements in respect of the
                 execution and delivery by the Issuer of the Securities and
                 Coupons, if any, have been complied with; and

                         (d) such other matters as the Trustee may reasonably
                 request.

         The Trustee shall have the right to decline to authenticate and deliver
any Securities and Coupons, if any, under this Section if the Trustee, being
advised by counsel, determines that such action may not lawfully be taken by the
Issuer or if the Trustee in good faith by its board of directors or board of
trustees, executive committee, or a trust committee of directors, trustees or
Responsible Officers shall determine that such action would expose the Trustee
to personal liability to existing Holders.

         SECTION 2.5 Execution of Securities. The Securities and, if applicable,
each Coupon appertaining thereto, shall be signed on behalf of the Issuer by
both (a) the chairman of its Board of Directors or any vice chairman of its
Board of Directors or its president or any vice president or its treasurer or
any assistant treasurer and (b) by its secretary or any assistant secretary,
under its corporate seal which may, but need not, be

<PAGE>   19

                                       11

attested. Such signatures may be the manual or facsimile signatures of the
present or any future such officers. The seal of the Issuer may be in the form
of a facsimile thereof and may be impressed, affixed, imprinted or otherwise
reproduced on the Securities. Typographical and other minor errors or defects in
any such reproduction of the seal or any such signature shall not affect the
validity or enforceability of any Security or Coupon that has been duly
authenticated and delivered by the Trustee.

         In case any officer of the Issuer who shall have signed any of the
Securities or Coupons shall cease to be such officer before the Security or
Coupon so signed (or the Security to which the Coupon so signed appertains)
shall be authenticated and delivered by the Trustee or disposed of by the
Issuer, such Security or Coupon nevertheless may be authenticated and delivered
or disposed of as though the person who signed such Security or Coupon had not
ceased to be such officer of the Issuer; and any Security or Coupon may be
signed on behalf of the Issuer by such persons as, at the actual date of the
execution of such Security or Coupon, shall be the proper officers of the
Issuer, although at the date of the execution and delivery of this Indenture any
such person was not such an officer.

         SECTION 2.6 Certificate of Authentication. Only such Securities as
shall bear thereon a certificate of authentication substantially in the form
hereinbefore recited, executed by the Trustee by the manual signature of one of
its authorized signatories, shall be entitled to the benefits of this Indenture
or be valid or obligatory for any purpose. Such certificate by the Trustee upon
any Security executed by the Issuer shall be conclusive evidence that the
Security so authenticated has been duly authenticated and delivered hereunder
and that the holder is entitled to the benefits of this Indenture. No Coupon
shall be entitled to the benefits of this Indenture or shall be valid or
obligatory for any purpose until such certificate by the Trustee shall have
become duly executed on the Security to which such Coupon appertains.

         SECTION 2.7 Denomination and Date of Securities; Payments of Interest.
The Securities shall be issuable as Registered Securities or Unregistered
Securities in such denominations as shall be specified as contemplated by
Section 2.3. In the absence of any such specification with respect to the
Registered Securities of any series, the Registered Securities of such series
shall be issuable in denominations of U.S. $1,000 and any integral multiple
thereof. In the absence of any such specification

<PAGE>   20

                                       12

with respect to the Unregistered Securities, Unregistered Securities shall be
issued in the denomination of U.S. $1,000. The Securities shall be numbered,
lettered, or otherwise distinguished in such manner or in accordance with such
plan as the officers of the Issuer executing the same may determine with the
approval of the Trustee as evidenced by the execution and authentication
thereof.

         Each Registered Security shall be dated the date of its authentication.
Each Unregistered Security shall be dated as provided in the resolution or
resolutions of the Board of Directors of the Issuer or the supplemental
indenture referred to in Section 2.3. The Securities of each series shall bear
interest, if any, from the date, and such interest shall be payable on the
dates, established as contemplated by Section 2.3.

         The person in whose name any Registered Security of any series is
registered at the close of business on any record date applicable to a
particular series with respect to any interest payment date for such series
shall be entitled to receive the interest, if any, payable on such interest
payment date notwithstanding any transfer or exchange of such Registered
Security subsequent to the record date and prior to such interest payment date,
except if and to the extent the Issuer shall default in the payment of the
interest due on such interest payment date for such series, in which case such
defaulted interest shall be paid to the persons in whose names Outstanding
Registered Securities for such series are registered at the close of business on
a subsequent record date (which shall be not less than five Business Days prior
to the date of payment of such defaulted interest) established by notice given
by mail by or on behalf of the Issuer to the holders of Registered Securities
not less than 15 days preceding such subsequent record date. The term "record
date" as used with respect to any interest payment date (except a date for
payment of defaulted interest) shall mean the date specified as such in the
terms of the Registered Securities of any particular series, or, if no such date
is so specified, if such interest payment date is the first day of a calendar
month, the fifteenth day of the next preceding calendar month or, if such
interest payment date is the fifteenth day of a calendar month, the first day of
such calendar month, whether or not such record date is a Business Day.

         Any defaulted interest payable in respect of any Unregistered Security
shall be payable pursuant to such procedures as are satisfactory to the Trustee
and in such manner so that there is no discrimination as between the holders of
Registered Securities and Unregistered Securities

<PAGE>   21

                                       13

of the same series and notice of the payment date therefor shall be given by the
Trustee in the name and at the expense of the Company by publication at least
once in an Authorized Newspaper. In case an Unregistered Security is surrendered
in exchange for a Registered Security after the close of business on any record
date for the payment of defaulted interest and before the opening of business on
the proposed date of payment of such defaulted interest, the Coupon appertaining
to such surrendered Unregistered Security and due for payment on such proposed
date of payment will not be surrendered with such surrendered Unregistered
Security and interest payable on such proposed date of payment will be made only
to the holder of such Coupon on such proposed date.

         SECTION 2.8. Registration, Transfer and Exchange. The Issuer will keep
or cause to be kept at each office or agency to be maintained for the purpose as
provided in Section 3.2 a register or registers for each series of Registered
Securities issued hereunder (collectively, the "Security Register") in which,
subject to such reasonable regulations as it may prescribe, it will register,
and will register the transfer of, or cause the registration of transfer of,
Registered Securities as in this Article provided. Such register shall be in
written form in the English language or in any other form capable of being
converted into such form within a reasonable time. At all reasonable times such
register or registers shall be open for inspection by the Trustee.

         Upon due presentation for registration of transfer of any Registered
Security of any series at any such office or agency to be maintained for the
purpose as provided in Section 3.2, the Issuer shall execute and the Trustee
shall authenticate and deliver in the name of the transferee or transferees a
new Registered Security or Registered Securities of the same series in
authorized denominations for a like aggregate principal amount.

         Unregistered Securities (except for any temporary Unregistered
Securities) and Coupons (except for Coupons attached to any temporary
Unregistered Securities) shall be transferable by delivery.

         Any Registered Security or Registered Securities of any series may be
exchanged for a Registered Security or Registered Securities of the same series
in other authorized denominations, in all equal aggregate principal amount.
Registered Securities of any series to be exchanged shall be surrendered at any
office or agency to be maintained by the Issuer

<PAGE>   22

                                       14

for the purpose as provided in Section 3.2, and the Issuer shall execute and the
Trustee shall authenticate and deliver in exchange therefor the Registered
Security or Registered Securities of the same series which the Securityholder
making the exchange shall be entitled to receive, bearing numbers not
contemporaneously outstanding. If the Securities of any series are issued in
both registered and unregistered form, except as otherwise specified pursuant to
Section 2.3, at the option of the Holder thereof, Unregistered Securities of any
series may be exchanged for Registered Securities of such series, maturity date,
and interest rate of any authorized denominations and of a like aggregate
principal amount, upon surrender of such Unregistered Securities to be exchanged
at the agency of the Issuer that shall be maintained for such purpose in
accordance with Section 3.2, with, in the case of Unregistered Securities that
have Coupons attached, all unmatured Coupons and all matured Coupons in default
thereto appertaining, and upon payment, if the Issuer shall so require, of the
charges hereinafter provided. At the Option of the Holder thereof, if
Unregistered Securities of any series, maturity date, interest rate and original
issue date are issued in more than one authorized denomination, except as
otherwise specified pursuant to Section 2.3, such Unregistered Securities may be
exchanged for Unregistered Securities of such series, maturity date, interest
rate and original issue date of other authorized denominations and of a like
aggregate principal amount, upon surrender of such Unregistered Securities to be
exchanged at the agency of the Issuer that shall be maintained for such purpose
in accordance with Section 3.2 or as specified pursuant to Section 2.3, with, in
the case of Unregistered Securities that have Coupons attached, all unmatured
Coupons and all matured Coupons in default thereto appertaining, and upon
payment, if the Issuer shall so require, of the charges hereinafter provided.
Unless otherwise specified pursuant to Section 2.3, Registered Securities of any
series may not be exchanged for Unregistered Securities of such series. Whenever
any Securities, and the Coupons appertaining thereto, if any, are so surrendered
for exchange, the Issuer shall execute, and the Trustee shall authenticate and
deliver, the Securities, and the Coupons appertaining thereto, if any, which the
Holder making the exchange is entitled to receive. Notwithstanding the
foregoing, if an Unregistered Security of any series is surrendered at any such
office or agency in exchange for a Registered Security of the same series after
the close of business at such office or agency on any record date and before the
opening of business at such office or agency on the applicable interest payment
date, such Unregis-

<PAGE>   23

                                       15

tered Security shall be surrendered without the Coupon, if any, relating to such
interest payment date. All Securities and Coupons surrendered upon any exchange
or transfer provided for in this Indenture shall be promptly cancelled and
disposed of by the Trustee and the Trustee will deliver a certificate of
disposition thereof to the Issuer.

         All Registered Securities presented for registration of transfer,
exchange, redemption or payment shall (if so required by the Issuer or the
Trustee) be duly endorsed by, or be accompanied by a written instrument or
instruments of transfer in form satisfactory to the Issuer and the Trustee duly
executed by, the holder or his attorney duly authorized in writing.

         The Issuer may require payment of a sum sufficient to cover any tax or
other governmental charge that may be imposed in connection with any exchange or
registration of transfer of Securities and shall not be required to exchange or
register a transfer of any Securities until such payment is made. No service
charge shall be made for any such transaction.

         The Issuer shall not be required to exchange or register a transfer of
(a) any Securities of any series for a period of 15 days next preceding the
first mailing of notice of redemption of Securities of such series to be
redeemed, or (b) any Securities selected, called or being called for redemption
except, in the case of any Security where public notice has been given that such
Security is to be redeemed in part, the portion thereof not so to be redeemed
and except that all Unregistered Security may be exchanged for a Registered
Security of the same series being called for redemption.

         All Securities issued upon any transfer or exchange of Securities shall
be valid obligations of the Issuer, evidencing the same debt, and entitled to
the same benefits under this Indenture, as the Securities surrendered upon such
transfer or exchange.

         Notwithstanding anything herein or in the terms of any series of
Securities to the contrary, neither the Issuer nor the Trustee (which shall rely
on an Officers' Certificate and an Opinion of Counsel) shall be required to
exchange any Unregistered Security for a Registered Security if such exchange
would result in adverse Federal income tax consequences to the Issuer
(including, without limitation the inability of the Issuer to deduct from its
income, as computed for Federal income tax purposes, the interest payable on the
Unregistered Securities) under then applicable United States Federal income tax
laws.

<PAGE>   24

                                       16

         SECTION 2.9 Mutilated, Defaced, Destroyed, Lost and Stolen Securities.
In case any temporary or definitive Security or any Coupon appertaining to any
Security shall become mutilated, defaced or be destroyed, lost or stolen, the
Issuer in its discretion may execute, and upon the written request of any
officer of the Issuer, the Trustee shall authenticate and deliver, a new
Security of the same series, bearing a number not contemporaneously outstanding,
in exchange and substitution for the mutilated or defaced Security, or in lieu
of and substitution for the Security so destroyed, lost or stolen with Coupons
corresponding to the Coupons appertaining to the Security so mutilated, defaced,
destroyed, lost or stolen, or in exchange or substitution for the Security to
which such mutilated, defaced, destroyed, lost or stolen Coupons appertained,
with Coupons appertaining thereto corresponding to the Coupons so mutilated,
defaced, destroyed, lost or stolen. In every case the applicant for a substitute
Security or Coupon shall furnish to the Issuer and to the Trustee and any agent
of the Issuer or the Trustee such security or indemnity as may be required by
them to indemnify and defend and to save each of them harmless and, in every
case of destruction, loss or theft, evidence to their satisfaction of the
destruction, loss or theft of such Security and of the ownership thereof.

         Upon the issuance of any substitute Security or Coupon, the Issuer may
require the payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in relation thereto and any other expenses (including
the fees and expenses of the Trustee) connected therewith. In case any Security
or Coupon which has matured or is about to mature or has been called for
redemption in full shall become mutilated or defaced or be destroyed, lost or
stolen, the Issuer may, at its sole discretion, instead of issuing a substitute
Security or Coupon, pay or authorize the payment of the same (without surrender
thereof except in the case of a mutilated or defaced Security or Coupon), if the
applicant for such payment shall furnish to the Issuer and to the Trustee and
any agent of the issuer or the Trustee such security or indemnity as any of them
may require to save each of them harmless, and, in every case of destruction,
loss or theft, the applicant shall also furnish to the Issuer and the Trustee
and any agent of the Issuer or the Trustee evidence to their satisfaction of the
destruction, loss or theft of such Security or Coupon and of the ownership
thereof.

         Every substitute Security or Coupon of any series issued pursuant to
the provisions of this Section by virtue of the fact that any such

<PAGE>   25

                                       17

Security or Coupon is destroyed, lost or stolen shall constitute an additional
contractual obligation of the Issuer, whether or not the destroyed, lost or
stolen Security or Coupon shall be at any time enforceable by anyone and shall
be entitled to all the benefits of (but shall be subject to all the limitations
of rights set forth in) this Indenture equally and proportionately with any and
all other Securities or Coupons of such series duly authenticated and delivered
hereunder. All Securities or Coupons shall be held and owned upon the express
condition that, to the extent permitted by law, the foregoing provisions are
exclusive with respect to the replacement or payment of mutilated, defaced or
destroyed, lost or stolen Securities or Coupons and shall preclude any and all
other rights or remedies notwithstanding any law or statute existing or
hereafter enacted to the contrary with respect to the replacement or payment of
negotiable instruments or other securities without their surrender.

         SECTION 2.10 Cancellation of Securities; Destruction Thereof. All
Securities and Coupons surrendered for payment, redemption, registration of
transfer or exchange, or for credit against any payment in respect of a sinking
or analogous fund, if surrendered to the Issuer or any agent of the Issuer or
the Trustee, shall be delivered to the Trustee for cancellation or, if
surrendered to the Trustee, shall be cancelled by it; and no Securities or
Coupons shall be issued in lieu thereof except as expressly permitted by any of
the provisions of this Indenture. The Trustee shall destroy cancelled Securities
and Coupons held by it and deliver a certificate of destruction to the Issuer.
If the Issuer shall acquire any of the Securities or Coupons, such acquisition
shall not operate as a redemption or satisfaction of the indebtedness
represented by such Securities or Coupons unless and until the same are
delivered to the Trustee for cancellation.

         SECTION 2.11 Temporary Securities. Pending the preparation of
definitive Securities for any series, the Issuer may execute and the Trustee
shall authenticate and deliver temporary Securities for such series (printed,
lithographed, typewritten or otherwise reproduced, in each case in form
satisfactory to the Trustee). Temporary Securities of any series shall be
issuable as Registered Securities without Coupons, or as Unregistered Securities
with or without Coupons attached thereto, of any authorized denomination, and
substantially in the form of the definitive Securities of such series but with
such omissions, insertions and variations as may be appropriate for temporary
Securities, all as may be

<PAGE>   26

                                       18

determined by the Issuer with the concurrence of the Trustee. Temporary
Securities may contain such reference to any provisions of this Indenture as may
be appropriate. Every temporary Security shall be executed by the Issuer and be
authenticated by the Trustee upon the same conditions and in substantially the
same manner, and with like effect, as the definitive Securities. Without
unreasonable delay the Issuer shall execute and shall furnish definitive
Securities of such series and thereupon temporary Securities of such series may
be surrendered in exchange therefor without charge at each office or agency to
be maintained by the Issuer for that purpose pursuant to Section 3.2, and in the
case of Unregistered Securities, together with any unmatured Coupons and any
matured Coupons in default appertaining thereto, at any agency maintained by the
Issuer for such purpose as specified pursuant to Section 2.3, and the Trustee
shall authenticate and deliver in exchange for such temporary Securities of such
series a like aggregate principal amount of definitive Securities of the same
series of authorized denominations. Until so exchanged, the temporary Securities
and any unmatured Coupons appertaining thereto of any series shall be entitled
to the same benefits under this Indenture as definitive Securities and any
unmatured Coupons appertaining thereto of such series. The provisions of this
Section are subject to any restrictions or limitations on the issue and delivery
of temporary Unregistered Securities of any series that may be established
pursuant to Section 2.3 (including any provision that Unregistered Securities of
such series initially be issued in the form of a single global Unregistered
Security to be delivered to a depositary or agency of the Issuer located outside
the United States and the procedures pursuant to which definitive Unregistered
Securities of such series would be issued in exchange for such temporary global
Unregistered Security).

                                  ARTICLE THREE

                             COVENANTS OF THE ISSUER

         SECTION 3.1 Payment of Principal and Interest. The Issuer covenants and
agrees for the benefit of each series of Securities that it will duly and
punctually pay or cause to be paid the principal of, and interest on, each of
the Securities of such series at the place or places, at the respective times
and in the manner provided in such Securities. Except as specified in Section
2.3, the interest on Securities with Coupons attached (together with any
additional amounts payable pursuant to the terms of such Securities) shall be
payable only upon presentation and

<PAGE>   27

                                       19

surrender of the several Coupons for such interest installments as are evidenced
thereby as they severally mature. Except as specified in Section 2.3, the
interest on any temporary Unregistered Securities (together with any additional
amounts payable pursuant to the terms of such Securities) shall be paid, as to
the installments of interest evidenced by Coupons attached thereto, if any, only
upon presentation and surrender thereof and, as to the other installments of
interest, if any, only upon presentation of such Securities for notation thereon
of the payment of such interest. Each installment of interest on the Registered
Securities of any series may be paid by mailing checks for such interest payable
to or upon the written order of the holders of Registered Securities entitled
thereto as they shall appear on the registry books of the Issuer.

         SECTION 3.2 Offices for Payments, etc. So long as any of the Securities
remain outstanding, the Issuer will maintain the following for each series: an
office or agency (a) where the Registered Securities may be presented for
payment, (b) where the Registered Securities may be presented for registration
of transfer and for exchange as in this Indenture provided and (c) where notices
and demands to or upon the Issuer in respect of the Registered Securities or of
this Indenture may be served.

         The Issuer will maintain one or more agencies in a city or cities
located outside the United States (including any city in which such an agency is
required to be maintained under the rules of any stock exchange on which the
Securities of such series are listed) where the Unregistered Securities, if any,
of each series and Coupons, if any, appertaining thereto may be presented for
payment. No payment on any Unregistered Security or Coupon will be made upon
presentation of such Unregistered Security or Coupon at an agency of the Issuer
within the United States nor will any payment be made by transfer to an account
in, or by mail to an address in, the United States unless pursuant to applicable
United States laws and regulations then in effect such payment can be made
without adverse tax consequences to the Issuer. Notwithstanding the foregoing,
payments in U.S. dollars on Unregistered Securities of any series and Coupons
appertaining thereto which are denominated in U.S. dollars may be made at an
agency of the Issuer maintained in the Borough of Manhattan, The City of New
York if such payment in U.S. dollars at each agency maintained by the Issuer
outside the United States for payment on such Unregistered Securities is illegal
or effectively precluded by exchange controls or other similar restrictions.

<PAGE>   28

                                       20

         The Issuer will give to the Trustee written notice of the location of
any such office or agency and of any change of location thereof. With respect to
each series of Securities and Coupons whose terms are established pursuant to
Section 2.3, the Issuer hereby designates the Corporate Trust Office as the
initial office to be maintained by it for each such purpose. In case the Issuer
shall fail to so designate or maintain any such office or agency or shall fail
to give such notice of the location or of any change in the location thereof,
presentations and demands may be made and notices may be served at the Corporate
Trust Office.

         SECTION 3.3 Appointment to Fill a Vacancy in Office of Trustee. The
Issuer, whenever necessary to avoid or fill a vacancy in the office of Trustee,
will appoint, in the manner provided in Section 6.10, a Trustee, so that there
shall at all times be a Trustee with respect to each series of Securities
hereunder.

         SECTION 3.4 Paying Agents. Whenever the Issuer shall appoint a paying
agent other than the Trustee with respect to the Securities of any series, it
will cause such paying agent to execute and deliver to the Trustee an instrument
in which such agent shall agree with the Trustee, subject to the provisions of
this Section,

                 (a) that it will hold all sums received by it as such agent for
         the payment of the principal of or interest on the Securities of such
         series (whether such sums have been paid to it by the Issuer or by any
         other obligor on the Securities of such series) in trust for the
         benefit of the holders of the Securities of such series or the Coupons
         appertaining thereto or of the Trustee, and
                 (b) that it will give the Trustee notice of any failure by the
         Issuer (or by any other obligor on the Securities of such series) to
         make any payment of the principal of or interest on the Securities of
         such series when the same shall be due and payable.

         The Issuer will, on or prior to each due date of the principal of or
interest on the Securities of such series, deposit with the paying agent a sum
sufficient to pay such principal or interest so becoming due, and (unless such
paying agent is the Trustee) the Issuer will promptly notify the Trustee of any
failure to take such action.

         If the Issuer shall act as its own paying agent with respect to the
Securities or the Coupons appertaining thereto of any series, it will, on

<PAGE>   29

                                       21

or before each due date of the principal of or interest on the Securities or the
Coupons appertaining thereto of such series, set aside, segregate and hold in
trust for the benefit of the holders of the Securities or the Coupons
appertaining thereto of such series a sum sufficient to pay such principal or
interest so becoming due. The Issuer will promptly notify the Trustee of any
failure to take such action.

         Anything in this Section to the contrary notwithstanding, the Issuer
may at any time, for the purpose of obtaining a satisfaction and discharge with
respect to one or more or all series of Securities hereunder, or for any other
reason, pay or cause to be paid to the Trustee all sums held in trust for any
such series by the Issuer or any paying agent hereunder, as required by this
Section, such sums to be held by the Trustee upon the trusts herein contained.

         Anything in this Section to the contrary notwithstanding, the agreement
to hold sums in trust as provided in this Section is subject to the provisions
of Sections 10.3 and 10.4.

         SECTION 3.5 Written Statement to Trustee. The Issuer will deliver to
the Trustee on or before April 30 in each year (beginning with April 30, 1989) a
written statement, signed by two of its officers (which need not comply with
Section 11.5), stating that in the course of the performance of their duties as
officers of the Issuer they would normally have knowledge of any default by the
Issuer in the performance or fulfillment of any covenant, agreement or condition
contained in this Indenture, stating whether or not they have knowledge of any
such default and, if so, specifying each such default of which the signers have
knowledge and the nature thereof.

         SECTION 3.6 Luxembourg Publications. In the event of the publication of
any notice pursuant to Section 5.11, 6.10(a), 6.11, 8.2, 10.4 or 12.2, the party
making such publication in London shall also, to the extent that notice is
required to be given to Holders of Securities of any series by applicable
Luxembourg law or stock exchange regulation, as evidenced by an Officers'
Certificate delivered to such party, make a similar publication in Luxembourg.

<PAGE>   30

                                       22

                                  ARTICLE FOUR

                    SECURITYHOLDERS' LISTS AND REPORTS BY THE
                             ISSUER AND THE TRUSTEE

         SECTION 4.1 Issuer to Furnish Trustee Information as to Names and
Addresses of Securityholders. The Issuer covenants and agrees that it will
furnish or cause to be furnished to the Trustee a list in such form as the
Trustee may reasonably require of the names and addresses of the holders of the
Securities of each series:

                 (a) semiannually and not more that 15 days after each record
         date for the payment of interest on such Securities, as hereinabove
         specified, as of such record date and on dates to be determined
         pursuant to Section 2.3 for not-interest bearing securities in each
         year, and

                 (b) at such other times as the Trustee may request in writing,
         within 30 days after receipt by the Issuer of any such request as of a
         date not more than 15 days prior to the time such information is
         furnished,

PROVIDED that if and so long as the Trustee shall be the Security registrar for
such series and all of the Securities of such series are Registered Securities,
such list shall not be required to be furnished. The Trustee shall, at the
request of the Issuer, provide such list to the Issuer for so long as the
Trustee shall be the Security registrar.

         SECTION 4.2 Preservation and Disclosure of Securityholders' Lists. (a)
The Trustee shall preserve, in as current a form as is reasonably practicable,
all information as to the names and addresses of the holders of each series of
Securities (i) contained in the most recent list furnished to it as provided in
Section 4.1, (ii) received by it in the capacity of Security registrar for such
series, if so acting and (iii) filed with it within the preceding two years
pursuant to Section 4.4(c)(ii). The Trustee may destroy any list furnished to it
as provided in Section 4.1 upon receipt of a new list so furnished.

         (b) In case three or more holders of Securities (hereinafter referred
to as "applicants") apply in writing to the Trustee and furnish to the Trustee
reasonable proof that each such applicant has owned a Security for a period of
at least six months preceding the date of such application, and such application
states that the applicants desire to communicate with other holders of
Securities of a particular series (in which case the applicants must all hold
Securities of such series) or with Holders of all

<PAGE>   31

                                       23

Securities with respect to their rights under this Indenture or under such
Securities and such application is accompanied by a copy of the form of proxy or
other communication which such applicants propose to transmit, then the Trustee
shall, within five Business Days after the receipt of such application, at its
election, either

                 (i) afford to such applicants access to the information
         preserved at the time by the Trustee in accordance with the provisions
         of subsection (a) of this Section, or

                 (ii) inform such applicants as to the approximate number of
         holders of Securities of such series or all Securities, as the case may
         be, whose names and addresses appear in the information preserved at
         the time by the Trustee, in accordance with the provisions of
         subsection (a) of this Section, and as to the approximate cost of
         mailing to such Securityholders the form of proxy or other
         communication, if any, specified in such application.

         If the Trustee shall elect not to afford to such applicants access to
such information, the Trustee shall, upon the written request of such
applicants, mail to each Securityholder of such series or all Securities, as the
case may be, whose name and address appears in the information preserved at the
time by the Trustee in accordance with the provisions of subsection (a) of this
Section a copy of the form of proxy or other communication which is specified in
such request, with reasonable promptness after a tender to the Trustee of the
material to be mailed and of payment, or provision for the payment, of the
reasonable expenses of mailing, unless within five days after such tender, the
Trustee shall mail to such applicants and file with the Commission together with
a copy of the material to be mailed, a written statement to the effect that, in
the opinion of the Trustee, such mailing would be contrary to the best interests
of the holders of Securities of such series or all Securities, as the case may
be, or would be in violation of applicable law. Such written statement shall
specify the basis of such opinion. If the Commission, after opportunity for a
hearing upon the objections specified in the written statement so filed, shall
enter an order refusing to sustain any of such objections or if, after the entry
of an order sustaining one or more of such objections, the Commission shall
find, after notice and opportunity for hearing, that all the objections so
sustained have been met, and shall enter an order so declaring, the Trustee
shall mail copies of such material to all such Securityholders with reasonable
promptness after the entry of such order and the renewal of such tender;
otherwise the Trustee shall

<PAGE>   32

                                       24

be relieved of any obligation or duty to such applicants respecting their
application.

         (c) Each and every holder of Securities and Coupons, by receiving and
holding the same, agrees with the Issuer and the Trustee that neither the Issuer
nor the Trustee nor any agent of the Issuer or the Trustee shall be held
accountable by reason of the disclosure of any such information as to the names
and addresses of the holders of Securities in accordance with the provisions of
subsection (b) of this Section, regardless of the source from which such
information was derived, and that the Trustee shall not be held accountable by
reason of mailing any material pursuant to a request made under such subsection
(b).

         SECTION 4.3 Reports by the Issuer. The Issuer covenants:

                 (a) to file with the Trustee, within 15 days after the Issuer
         is required to file the same with the Commission, copies of the annual
         reports and of the information, documents, any other reports (or copies
         of such portions of any of the foregoing as the Commission may from
         time to time by rules and regulations prescribe) which the Issuer may
         be required to file with the Commission pursuant to Section 13 or
         Section 15(d) of the Securities Exchange Act of 1934, of if the Issuer
         is not required to file information, documents, or reports pursuant to
         either of such Sections, then to file with the Trustee and the
         Commission, in accordance with rules and regulations prescribed from
         time to time by the Commission, such of the supplementary and periodic
         information, documents, and reports which may be required pursuant to
         Section 13 of the Securities Exchange Act of 1934, or in respect of a
         security listed and registered on a national securities exchange as may
         be prescribed from time to time in such rules and regulations;

                 (b) to file with the Trustee and the Commission, in accordance
         with rules and regulations prescribed from time to time by the
         Commission, such additional information, documents, and reports with
         respect to compliance by the Issuer with the conditions and covenants
         provided for in this Indenture as may be required from time to time by
         such rules and regulations; and

                 (c) to transmit by mail to the holders of Securities, within 30
         days after the filing thereof with the Trustee, such summaries of any
         information, documents and reports required to be filed by the Issuer
         pursuant to subsections (a) and (b) of this Section as may be required

<PAGE>   33

                                       25

         to be transmitted to such Holders by rules and regulations prescribed
from time to time by the Commission.

         SECTION 4.4 Reports by the Trustee. (a) On or before July 15 in each
year following the date hereof, so long as any Securities are Outstanding
hereunder, the Trustee shall transmit by mail as provided below to the
Securityholders of each series, as hereinafter in this Section provided, a brief
report dated as of the preceding May 15 with respect to:

                 (i) its eligibility under Section 6.9 and its qualification
         under Section 6.8, or in lieu thereof, if to the best of its knowledge
         it has continued to be eligible and qualified under such Sections, a
         written statement to such effect;

                 (ii) the character and amount of any advances (and if the
         Trustee elects so to state, the circumstances surrounding the making
         thereof) made by the Trustee (as such) which remain unpaid on the date
         of such report and for the reimbursement of which it claims or may
         claim a lien or charge, prior to that of the Securities of any series,
         on any property or funds held or collected by it as Trustee, except
         that the Trustee shall not be required (but may elect) to report such
         advances if such advances so remaining unpaid aggregate not more than
         1/2 of 1% of the principal amount of the securities of any series
         Outstanding on the date of such report;

                 (iii) the amount, interest rate, and maturity date of all other
         indebtedness owing by the Issuer (or by any other obligor on the
         Securities) to the Trustee in its individual capacity on the date of
         such report, with a brief description of any property held as
         collateral security therefor, except any indebtedness based upon a
         creditor relationship arising in any manner described in Section
         6.13(b)(2), (3), (4) or (6);

                 (iv) the property and funds, if any, physically in the
         possession of the Trustee (as such) on the date of such report;

                 (v) any additional issue of Securities which the Trustee has
         not previously reported; and

                 (vi) any action taken by the Trustee in the performance of its
         duties under this Indenture which it has not previously reported and
         which in its opinion materially affects the Securities, except action
         in respect of a default, notice of which has been or is to be withheld
         by it in accordance with the provisions of Section 5.11.

<PAGE>   34

                                       26

         (b) The Trustee shall transmit to the Securityholders of each series,
as provided in subsection (c) of this Section, a brief report with respect to
the character and amount of any advances (and if the Trustee elects so to state,
the circumstances surrounding the making thereof) made by the Trustee, as such,
since the date of the last report transmitted pursuant to the provisions of
subsection (a) of this Section (or if no such report has yet been so
transmitted, since the date of this Indenture) for the reimbursement of which it
claims or may claim a lien or charge prior to that of the Securities of such
series on property or funds held or collected by it as Trustee and which it has
not previously reported pursuant to this subsection (b), except that the Trustee
shall not be required (but may elect) to report such advances if such advances
remaining unpaid at any time aggregate 10% or less of the principal amount of
Securities of such series outstanding at such time, such report to be
transmitted within 90 days after such time.

         (c) Reports pursuant to this Section shall be transmitted by mail:

                 (i) to all registered Holders of Securities, as the names and
         addresses of such Holders appear upon the registry books of the
         Issuer;

                 (ii) to such other Holders of Securities as have, within two
         years preceding such transmission, filed their names and addresses with
         the Trustee for that purpose; and

                 (iii) except in the case of reports pursuant to subsection (b),
         to each Holder of a Security whose name and address are preserved at
         the time by the Trustee as provided in Section 4.2(a).

         (d) A copy of each such report shall, at the time of such transmission
to Securityholders, be furnished to the Issuer and be filed by the Trustee with
each stock exchange upon which the Securities of any applicable series are
listed and also with the Commission. The Issuer agrees to notify the Trustee
with respect to any series when and as the Securities of such series become
admitted to trading on any national securities exchange.

<PAGE>   35

                                       27

                                  ARTICLE FIVE

                   REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                               ON EVENT OF DEFAULT

         SECTION 5.1 Event of Default Defined; Acceleration of Maturity; Waiver
of Default. "Event of Default" with respect to Securities of any series wherever
used herein, means each one of the following events which shall have occurred
and be continuing (whatever the reason for such Event of Default and whether it
shall be voluntary or involuntary or be effected by operation of law or pursuant
to any judgment, decree or order of any court or any order, rule or regulation
of any administrative or governmental body):

                 (a) default in the payment of any installment of interest upon
         any of the Securities of such series as and when the same shall become
         due and payable, and continuance of such default for a period of 30
         days; or

                 (b) default in the payment of all or any part of the principal
         on any of the Securities of such series as and when the same shall
         become due and payable either at maturity, upon redemption, by
         declaration or otherwise; or

                 (c) default in the payment of any sinking fund installment as
         and when the same shall become due and payable by the terms of the
         Securities of such series; or

                 (d) default in the performance, or breach, of any covenant or
         warranty of the Issuer in respect of the Securities of such series
         (other than a covenant or warranty in respect of the Securities of such
         series a default in whose performance or whose breach is elsewhere in
         this Section specifically dealt with), and continuance of such default
         or breach for a period of 90 days after there has been given, by
         registered or certified mail, to the Issuer by the Trustee or to the
         Issuer and the Trustee by the Holders of at least 25% in principal
         amount of the Outstanding Securities of all series affected thereby, a
         written notice specifying such default or breach and requiring it to be
         remedied and stating that such notice is a "Notice of Default"
         hereunder; or

                 (e) a court having jurisdiction in the premises shall enter a
         decree or order for relief in respect of the Issuer in an involuntary
         case under any applicable bankruptcy, insolvency or other similar law
         now or hereafter in effect, or appointing a receiver, liquidator,
         assignee, custodian, trustee or sequestrator (or similar official) of
         the

<PAGE>   36

                                       28

         Issuer or for any substantial part of its property or ordering the
         winding up or liquidation of its affairs, and such decree or order
         shall remain unstayed and in effect for a period of 90 consecutive
         days; or

                 (f) the Issuer shall commence a voluntary case under any
         applicable bankruptcy, insolvency or other similar law now or hereafter
         in effect, or consent to the entry of an order for relief in an
         involuntary case under any such law, or consent to the appointment of
         or taking possession by a receiver, liquidator, assignee, custodian,
         trustee or sequestrator (or similar official) of the Issuer or for any
         substantial part of its property, or make any general assignment for
         the benefit of creditors; or

                 (g) any other Event of Default provided in the supplemental
         indenture or resolution of the Board of Directors under which such
         series of Securities is issued or in the form of Security for such
         series.

If an Event of Default described in clauses (a), (b), (c) or (d) above (if the
Event of Default under clause (d) is with respect to less than all series of
Securities then Outstanding) occurs and is continuing, then, and in each and
every such case, unless the principal of all of the Securities of such series
shall have already become due and payable, either the Trustee or the holders of
not less than 25% in aggregate principal amount of the Securities of such series
then Outstanding hereunder (each such series voting as a separate class) by
notice in writing to the Issuer (and to the Trustee if given by
Securityholders), may declare the entire principal (or, if the Securities of
such series are Original Issue Discount Securities, such portion of the
principal amount as may be specified in the terms of such series) of all
Securities of such series and the interest accrued thereon, if any, to be due
and payable immediately, and upon any such declaration the same shall become
immediately due and payable. If an Event of Default described in clause (d) (if
the Event of Default under clause (d) is with respect to all series of
Securities then Outstanding), (e) or (f) occurs and is continuing, then and in
each and every such case, unless the principal of all the Securities shall have
already become due and payable, either the Trustee or the Holders of not less
than 25% in

<PAGE>   37

                                       29

aggregate principal amount of all the Securities then Outstanding hereunder
(treated as one class), by notice in writing to the Issuer (and to the Trustee
if given by Securityholders), may declare the entire principal (or, if any
Securities are Original Issue Discount Securities, such portion of the principal
as may be specified in the terms thereof) of all the Securities then Outstanding
and interest accrued thereon, if any, to be due and payable immediately, and
upon any such declaration the same shall become immediately due and payable.

         The foregoing provisions, however, are subject to the condition that
if, at any time after the principal (or, if the Securities are Original Issue
Discount Securities, such portion of the principal as may be specified in the
terms thereof) of the Securities of any series (or of all the Securities, as the
case may be) shall have been so declared due and payable, and before any
judgment or decree for the payment of the moneys due shall have been obtained or
entered as hereinafter provided, the Issuer shall pay or shall deposit with the
Trustee a sum sufficient to pay all matured installments of interest upon all
the Securities of such series (or of all the Securities, as the case may be) and
the principal of any and all Securities of such series (or of all the
Securities, as the case may be) which shall have become due otherwise than by
acceleration (with interest upon such principal and, to the extent that payment
of such interest is enforceable under applicable law, on overdue installments of
interest, at the same rate as the rate of interest or Yield to Maturity (in the
case of Original Issue Discount Securities) specified in the Securities of such
series (or at the respective rates of interest or Yields to Maturity of all the
Securities, as the case may be, to the date of such payment or deposit) and such
amount as shall be sufficient to cover reasonable compensation to the Trustee,
its agents, attorneys and counsel, and all other expenses and liabilities
incurred, and all advances made, by the Trustee except as a result of negligence
or bad faith, and all other amounts due to the Trustee or any predecessor
Trustee pursuant to Section 6.6, and if any and all Events of Default under the
Indenture, other than the non-payment of the principal of Securities which shall
have become due by acceleration, shall have been cured, waived or otherwise
remedied as provided herein -- then and in every such case the holders of a
majority in aggregate principal amount of all the Securities of such series,
each series voting as a separate class (or of all the Securities, as the case
may be, voting as a single class) then outstanding, by written notice to the
Issuer and to the Trustee, may waive all defaults with respect to such series
(or with respect to all the

<PAGE>   38

                                       30

Securities, as the case may be) and rescind and annul such declaration and its
consequences, but no such waiver or rescission and annulment shall extend to or
shall affect any subsequent default or shall impair any right consequent
thereon.

         For all purposes under this Indenture, if a portion of the principal of
any Original Issue Discount Securities shall have been accelerated and declared
due and payable pursuant to the provisions hereof, then, from and after such
declaration, unless such declaration has been rescinded and annulled, the
principal amount of such Original Issue Discount Securities shall be deemed, for
all purposes hereunder, to be such portion of the principal thereof as shall be
due and payable as a result of such acceleration, and payment of such portion of
the principal thereof as shall be due and payable as a result of such
acceleration, together with interest, if any, thereon and all other amounts
owing thereunder, shall constitute payment in full of such Original Issue
Discount Securities.

         SECTION 5.2 Collection of Indebtedness by Trustee, Trustee May Prove
Debt. The Issuer covenants that (a) in case default shall be made in the payment
of any installment of interest on any of the Securities of any series when such
interest shall have become due and payable, and such default shall have
continued for a period of 30 days or (b) in case default shall be made in the
payment of all or any part of the principal of any of the Securities of any
series when the same shall have become due and payable, whether upon maturity of
the Securities of such series or upon any redemption or by declaration or
otherwise -- then upon demand of the Trustee, the Issuer will pay to the Trustee
for the benefit of the Holders of the Securities of such series the whole amount
that then shall have become due and payable on all Securities of such series,
and Coupons appertaining thereto, for principal or interest, as the case may be
(with interest to the date of such payment upon the overdue principal and, to
the extent that payment of such interest is enforceable under applicable law, on
overdue installments of interest at the same rate as the rate of interest or
Yield to Maturity (in the case of Original Issue Discount Securities) specified
in the Securities of such series); and in addition thereto, such further amount
as shall be sufficient to cover the costs and expenses of collection, including
reasonable compensation to the Trustee and each predecessor Trustee, their
respective agents, attorneys and counsel, and any expenses and liabilities
incurred, and all advances made, by the Trustee and each predecessor Trustee
except as a result of its negligence or bad faith, and all other amounts due to
the Trustee or any predecessor Trustee pursuant to Section 6.6.

<PAGE>   39

                                       31

         Until such demand is made by the Trustee, the Issuer may pay the
principal of and interest on the Securities of any series to the holders,
whether or not the principal of and interest on the Securities of such series be
overdue.

         In case the Issuer shall fail forthwith to pay such amounts upon such
demand, the Trustee, in its own name and as trustee of an express trust, shall
be entitled and empowered to institute any action or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceedings to judgment or final decree, and may enforce any such
judgment or final decree against the Issuer or other obligor upon such
Securities and collect in the manner provided by law out of the property of the
Issuer or other obligor upon such Securities, wherever situated, the moneys
adjudged or decreed to be payable.

         In case there shall be pending proceedings relative to the Issuer or
any other obligor upon the Securities under Title 11 of the United States Code
or any other applicable Federal or state bankruptcy, insolvency or other similar
law, or in case a receiver, assignee or trustee in bankruptcy or reorganization,
liquidator, sequestrator or similar official shall have been appointed for or
taken possession of the Issuer or its property or such other obligor, or in case
of any other comparable judicial proceedings relative to the Issuer or other
obligor upon the Securities of any series, or Coupons appertaining thereto, or
to the creditors or property of the Issuer or such other obligor, the Trustee,
irrespective of whether the principal of any Securities shall then be due and
payable as therein expressed or by declaration or otherwise and irrespective of
whether the Trustee shall have made any demand pursuant to the provisions of
this Section, shall be entitled and empowered, by intervention in such
proceedings or otherwise:

                 (a) to file and prove a claim or claims for the whole amount of
         principal and interest (or, if the Securities of any series are
         Original Issue Discount Securities, such portion of the principal
         amount as may be specified in the terms of such series) owing and
         unpaid in respect of the Securities of any series, and to file such
         other papers or documents as may be necessary or advisable in order to
         have the claims of the Trustee (including any claim for reasonable
         compensation to the Trustee and each predecessor Trustee, and their
         respective agents, attorneys and counsel, and for reimbursement of all
         expenses and liabilities incurred, and all advances made, by the
         Trustee and

<PAGE>   40

                                       32

         each predecessor Trustee, except as a result of negligence or bad
         faith, and all other amounts due to the Trustee or any predecessor
         Trustee pursuant to Section 6.6) and of the Securityholders allowed in
         any judicial proceedings relative to the Issuer or other obligor upon
         the Securities of any series, or to the creditors or property of the
         Issuer or such other obligor,

                 (b) unless prohibited by applicable law and regulations, to
         vote on behalf of the holders of the Securities of any series in any
         election of a trustee or a standby trustee in arrangement,
         reorganization, liquidation or other bankruptcy or insolvency
         proceedings or person performing similar functions in comparable
         proceedings, and

                 (c) to collect and receive any moneys or other property payable
         or deliverable on any such claims, and to distribute all amounts
         received with respect to the claims of the Securityholders and of the
         Trustee on their behalf; and any trustee, receiver, or liquidator,
         custodian or other similar official is hereby authorized by each of the
         Securityholders to make payments to the Trustee, and, in the event that
         the Trustee shall consent to the making of payments directly to the
         Securityholders, to pay to the Trustee such amounts as shall be
         sufficient to cover reasonable compensation to the Trustee, each
         predecessor Trustee and their respective agents, attorneys and counsel,
         and all other expenses and liabilities incurred, and all advances made,
         by the Trustee and each predecessor Trustee except as a result of
         negligence or bad faith and all other amounts due to the Trustee or any
         predecessor Trustee pursuant to Section 6.6.

         Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or vote for or accept or adopt on behalf of any
Securityholder any plan or reorganization, arrangement, adjustment or
composition affecting the Securities or Coupons appertaining thereto of any
series or the rights of any Holder thereof, or to authorize the Trustee to vote
in respect of the claim of any Securityholder in any such proceeding except, as
aforesaid, to vote for the election of a trustee in bankruptcy or similar
person.

         All rights of action and of asserting claims under this Indenture, or
under any of the Securities, or Coupons appertaining thereto, may be enforced by
the Trustee without the possession of any of the Securities, or Coupons
appertaining thereto, or the production thereof on any trial or other
proceedings relative thereto, and any such action or proceedings

<PAGE>   41

                                       33

instituted by the Trustee shall be brought in its own name as trustee of an
express trust, and any recovery of judgment, subject to the payment of the
expenses, disbursements, compensation and all other amounts due pursuant to
Section 6.6 to the Trustee, each predecessor Trustee and their respective agents
and attorneys, shall be for the ratable benefit of the holders of the
Securities, or Coupons appertaining thereto, in respect of which such action was
taken.

         In any proceedings brought by the Trustee (and also any proceedings
involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party) the Trustee shall be held to represent all the holders
of the Securities in respect to which such action was taken, and it shall not be
necessary to make any holders of such Securities parties to any such
proceedings.

         SECTION 5.3 Application of Proceeds. Any moneys collected by the
Trustee pursuant to this Article in respect of any series shall be applied in
the following order at the date or dates fixed by the Trustee and, in case of
the distribution of such moneys on account of principal or interest, upon
presentation of the several Securities, and Coupons appertaining thereto, in
respect of which monies have been collected and stamping (or otherwise noting)
thereon the payment, or issuing Securities of such series in reduced principal
amounts in exchange for the presented Securities of like series if only
partially paid, or upon surrender thereof if fully paid:

                 FIRST: To the payment of costs and expenses applicable to such
         series in respect of which monies have been collected, including
         reasonable compensation to the Trustee and each predecessor Trustee and
         their respective agents and attorneys and of all expenses and
         liabilities incurred, and all advances made, by the Trustee and each
         predecessor Trustee except as a result of negligence or bad faith, and
         all other amounts due to the Trustee or any predecessor Trustee
         pursuant to Section 6.6;

                 SECOND: In case the principal of the Securities of such series
         in respect of which moneys have been collected shall not have become
         and be then due and payable, to the payment of interest on the
         Securities of such series in default in the order of the maturity of
         the installments of such interest, with interest (to the extent that
         such interest has been collected by the Trustee) upon the overdue
         installments of interest at the same rate as the rate of interest or
         Yield

<PAGE>   42

                                       34

         to Maturity (in the case of Original Issue Discount Securities)
         specified in such Securities, such payments to be made ratably to the
         persons entitled thereto, without discrimination or preference;

                 THIRD: In case the principal of the Securities of such series
         in respect of which moneys have been collected shall have become and
         shall be then due and payable, to the payment of the whole amount then
         owing and unpaid upon all the Securities of such series for principal
         and interest, with interest upon the overdue principal, and (to the
         extent that such interest has been collected by the Trustee) upon
         overdue installments of interest at the same rate as the rate of
         interest or Yield to Maturity (in the case of Original Issue Discount
         Securities) specified in the Securities of such series; and in case
         such moneys shall be insufficient to pay in full the whole amount so
         due and unpaid upon the Securities of such series, then to the payment
         of such principal and interest or yield to maturity, without preference
         or priority of principal over interest or yield to maturity, or of
         interest or yield to maturity over principal, or of any installment of
         interest over any other installment of interest, or of any Security of
         such series over any other Security of such series, ratably to the
         aggregate of such principal and accrued and unpaid interest or yield to
         maturity; and

                 FOURTH: To the payment of the remainder, if any, to the Issuer
         or any other person lawfully entitled thereto.

         SECTION 5.4 Suits for Enforcement. In case an Event of Default has
occurred, has not been waived and is continuing, the Trustee may in its
discretion proceed to protect and enforce the rights vested in it by this
Indenture by such appropriate judicial proceedings as the Trustee shall deem
most effectual to protect and enforce any of such rights, either at law or in
equity or in bankruptcy or otherwise, whether for the specific enforcement of
any covenant or agreement contained in this Indenture or in aid of the exercise
of any power granted in this Indenture or to enforce any other legal or
equitable right vested in the Trustee by this Indenture or by law.

         SECTION 5.5 Restoration of Rights on Abandonment of Proceedings. In
case the Trustee shall have proceeded to enforce any right under this Indenture
and such proceedings shall have been discontinued

<PAGE>   43

                                       35

or abandoned for any reason, or shall have been determined adversely to the
Trustee, then and in every such case the Issuer and the Trustee shall be
restored respectively to their former positions and rights hereunder, and all
rights, remedies and powers of the Issuer, the Trustee and the Securityholders
shall continue as though no such proceedings had been taken.

         SECTION 5.6 Limitations on Suits by Securityholders. No holder of any
Security of any series or of any Coupon appertaining thereto shall have any
right by virtue or by availing of any provision of this Indenture to institute
any action or proceeding at law or in equity or in bankruptcy or otherwise upon
or under or with respect to this Indenture, or for the appointment of a trustee,
receiver, liquidator, custodian or other similar official or for any other
remedy hereunder, unless such holder previously shall have given to the Trustee
written notice of default and in of the continuance thereof, as hereinbefore
provided, and unless also the holders of not less than 25% in aggregate
principal amount of the Securities of such series then Outstanding shall have
made written request upon the Trustee to institute such action or proceedings in
its own name as trustee hereunder and shall have offered to the Trustee such
reasonable indemnity as it may require against the costs, expenses and
liabilities to be incurred therein or thereby and the Trustee for 60 days after
its receipt of such notice, request and offer of indemnity shall have failed to
institute any such action or proceeding and no direction inconsistent with such
written request shall have been given to the Trustee pursuant to Section 5.9; it
being understood and intended, and being expressly covenanted by the taker and
Holder of every Security or Coupon with every other taker and Holder and the
Trustee, that no one or more Holders of Securities of any series or of any
Coupon appertaining thereto shall have any right in any manner whatever by
virtue or by availing of any provision of this Indenture to affect, disturb or
prejudice the rights of any other such Holder of Securities or Coupons, or to
obtain or seek to obtain priority over or preference to any other such Holder or
to enforce any right under this Indenture, except in the manner herein provided
and for the equal, ratable and common benefit of all Holders of Securities of
the applicable series or of any Coupon appertaining thereto. For the protection
and enforcement of the provisions of this Section, each and every Securityholder
and the Trustee shall be entitled to such relief as can be given either at law
or in equity.

<PAGE>   44

                                       36

         SECTION 5.7 Unconditional Right of Securityholders to Institute Certain
Suits. Notwithstanding any other provision in this Indenture and any provision
of any Security, the right of any holder of any Security or Coupon to receive
payment of the principal of an interest on such Security or Coupon on or after
the respective due dates expressed in such Security or Coupon, or in any Coupon
appertaining thereto, or to institute suit for the enforcement of any such
payment on or after such respective dates, shall not be impaired or affected
without the consent of such Holder.

         SECTION 5.8 Powers and Remedies Cumulative; Delay or Omission Not
Waiver of Default. Except as provided in Section 2.9, no right or remedy herein
conferred upon or reserved to the Trustee or to the Securityholders is intended
to be exclusive of any other right or remedy, and every right and remedy shall,
to the extent permitted by law, be cumulative and in addition to every other
right and remedy given hereunder or now or hereafter existing at law or in
equity or otherwise. The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

         No delay or omission of the Trustee or of any Securityholder to
exercise any right or power accruing upon any Event of Default occurring and
continuing as aforesaid shall impair any such right or power or shall be
construed to be a waiver of any such Event of Default or an acquiescence
therein; and, subject to Section 5.6, every power and remedy given by this
Indenture or by law to the Trustee or to the Securityholders may be exercised
from time to time, and as often as shall be deemed expedient, by the Trustee or
by the Securityholders.

         SECTION 5.9 Control by Securityholders. The Holders of a majority in
aggregate principal amount of the Securities of each series affected (with each
series voting as a separate class) at the time Outstanding shall have the right
to direct the time, method, and place of conducting any proceeding for any
remedy available to the Trustee, or exercising any trust or power conferred on
the Trustee with respect to the Securities of such series by this Indenture;
PROVIDED that such direction shall not be otherwise than in accordance with law
and the provisions of this Indenture and PROVIDED FURTHER that (subject to the
provisions of Section 6.1) the Trustee shall have the right to decline to follow
any such direction if the Trustee, being advised by counsel, shall determine
that the action or proceeding so directed may not lawfully be

<PAGE>   45

                                       37

taken or if the Trustee in good faith by its board of directors, the executive
committee, or a trust committee of directors or Responsible Officers of the
Trustee shall determine that the action or proceedings so directed would involve
the Trustee in personal liability or if the Trustee in good faith shall so
determine that the actions or forebearances specified in or pursuant to such
direction would be unduly prejudicial to the interests of Holders of the
Securities of all series so affected not joining in the giving of said
direction, it being understood that (subject to Section 6.1) the Trustee shall
have no duty to ascertain whether or not such actions or forebearances are
unduly prejudicial to such Holders.

         Nothing in this Indenture shall impair the right of the Trustee in its
discretion to take any action deemed proper by the Trustee and which is not
inconsistent with such direction or directions by Securityholders.

         SECTION 5.10 Waiver of Past Defaults. Prior to the declaration of the
acceleration of the maturity of the Securities of any series as provided in
Section 5.1, the Holders of a majority in aggregate principal amount of the
Securities of such series at the time Outstanding may on behalf of the Holders
of all the Securities of such series waive any past default or Event of Default
described in clause (d) of Section 5.1 (or, in the case of an event specified in
clause (d) of Section 5.1 which relates to less than all series of Securities
then Outstanding, the Holders of a majority in aggregate principal amount of the
Securities then Outstanding affected thereby (each series voting as a separate
class) may waive any such default or Event of Default, or, in the case of all
event specified in clause (d) (if the Event of Default under clause (d) relates
to all series of Securities then Outstanding), (e) or (f) of Section 5.1 the
Holders of Securities of a majority in principal amount of all the Securities
then Outstanding (voting as one class) may waive any such default or Event of
Default), and its consequences except a default in respect of a covenant or
provision hereof which cannot be modified or amended without the consent of the
Holder of each Security affected. In the case of any such waiver, the Issuer,
the Trustee and the Holders of the Securities of such series shall be restored
to their former positions and rights hereunder, respectively; but no such waiver
shall extend to any subsequent or other default or impair any right consequent
thereon.

         Upon any such waiver, such default shall cease to exist and be deemed
to have been cured and not to have occurred, and any Event of

<PAGE>   46

                                       38

Default arising therefrom shall be deemed to have been cured, and not to have
occurred for every purpose of this Indenture; but no such waiver shall extend to
any subsequent or other default or Event of Default or impair any right
consequent thereon.

         SECTION 5.11 Trustee to Give Notice of Default, But May Withhold in
Certain Circumstances. The Trustee shall, within 90 days after the occurrence of
a default known to the Trustee with respect to the Securities of any series,
provide notice to the Holders of Securities of such series and Coupons
appertaining thereto, if any, (i) if any Unregistered Securities of that series
are then Outstanding, to the Holders thereof, by publication at least once in an
Authorized Newspaper in London (and, if required by Section 3.6, at least once
in an Authorized Newspaper in Luxembourg), (ii) if any Unregistered Securities
of that series are then Outstanding, to all Holders thereof who have filed their
names and addresses with the Trustee pursuant to Section 4.4(c)(ii), by mailing
such notice to such Holders at such addresses and (iii) to all Holders of then
Outstanding Registered Securities of that series, by mailing such notice to such
Holders at their addresses as they shall appear in the registry books, unless
such defaults shall have been cured before the giving of such notice (the term
"default" or "defaults" for the purposes of this Section being hereby defined to
mean any event or condition which is, or with notice or lapse of time or both
would become, an Event of Default); PROVIDED that, except in the case of default
in the payment of the principal of or interest on any of the Securities of such
series, the Trustee shall be protected in withholding such notice if and so long
as the board of directors, the executive committee, or a trust committee of
directors or trustees and/or Responsible Officers of the Trustee in good faith
determines that the withholding of such notice is in the interests of the
Securityholders of such series.

         SECTION 5.12 Right of Court to Require Filing of Undertaking to Pay
Costs. All parties to this Indenture agree, and each Holder of any Security or
Coupon by his acceptance thereof shall be deemed to have agreed, that any court
may in its discretion require, in any suit for the enforcement of any right or
remedy under this Indenture or in any suit against the Trustee for any action
taken, suffered or omitted by it as Trustee, the filing by any party litigant in
such suit of an undertaking to pay the costs of such suit, and that such court
may in its discretion assess reasonable costs, including reasonable attorneys'
fees, against any

<PAGE>   47

                                       39

party litigant in such suit, having due regard to the merits and good faith of
the claims or defenses made by such party litigant; but the provisions of this
Section shall not apply to any suit instituted by the Trustee, to any suit
instituted by any Securityholder or group of Securityholders of any series
holding in the aggregate more than 10% in aggregate principal amount of the
Securities of such series, or, in the case of any suit relating to or arising
under clause (d) of Section 5.1 (if the suit relates to Securities of more than
one but less than all series), 10% in aggregate principal amount of Securities
Outstanding affected thereby, or in the case of any suit relating to or arising
under clause (d) (if the suit under clause (d) relates to all the Securities
then Outstanding), (e) or (f) of Section 5.1, 10% in aggregate principal amount
of all Securities Outstanding, or to any suit instituted by any Securityholder
for the enforcement of the payment of the principal of or interest on any
Security or Coupon on or after the due date expressed in such Security or
Coupon.

                                   ARTICLE SIX

                             CONCERNING THE TRUSTEE

         SECTION 6.1 Duties and Responsibilities of the Trustee; During Default;
Prior to Default. With respect to the Holders of any series of Securities issued
hereunder, the Trustee, prior to the occurrence of an Event of Default with
respect to the Securities of a particular series and after the curing or waiving
of all Events of Default which may have occurred with respect to such series,
undertakes to perform such duties and only such duties as are specifically set
forth in this Indenture. In case an Event of Default with respect to the
Securities of a series has occurred (which has not been cured or waived) the
Trustee shall exercise such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in their exercise, as a
prudent man would exercise or use under the circumstances in the conduct of his
own affairs.

         No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act or its own wilful misconduct, except that

                 (a) prior to the occurrence of an Event of Default with respect
         to the Securities of any series and after the curing or waiving of all
         such Events of Default with respect to such series which may have
         occurred:

                         (i) the duties and obligations of the Trustee with
                 respect to the Securities of any series shall be determined
                 solely by the

<PAGE>   48

                                       40

                 express provisions of this Indenture, and the Trustee shall not
                 be liable except for the performance of such duties and
                 obligations as are specifically set forth in this Indenture,
                 and no implied covenants or obligations shall be read into this
                 Indenture against the Trustee; and

                         (ii) in the absence of bad faith on the part of the
                 Trustee, the Trustee may conclusively rely, as to the truth of
                 the statements and the correctness of the opinions expressed
                 therein, upon any statements, certificates or opinions
                 furnished to the Trustee and conforming to the requirements of
                 this Indenture; but in the case of any such statements,
                 certificates or opinions which by any provision hereof are
                 specifically required to be furnished to the Trustee, the
                 Trustee shall be under a duty to examine the same to determine
                 whether or not they conform to the requirements of this
                 Indenture;

                 (b) the Trustee shall not be liable for any error of judgment
         made in good faith by a Responsible Officer or Responsible Officers of
         the Trustee, unless it shall be proved that the Trustee was negligent
         in ascertaining the pertinent facts; and

                 (c) the Trustee shall not be liable with respect to any action
         taken or omitted to be taken by it in good faith in accordance with the
         direction of the holders pursuant to Section 5.9 relating to the time,
         method and place of conducting any proceeding for any remedy available
         to the Trustee, or exercising any trust or power conferred upon the
         Trustee, under this Indenture.

         None of the provisions contained in this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur personal financial
liability in the performance of any of its duties or in the exercise of any of
its rights or powers, if there shall be reasonable ground for believing that the
repayment of such funds or adequate indemnity against such liability is not
reasonably assured to it.

         SECTION 6.2 Certain Rights of the Trustee. Subject to Section 6.1:

                 (a) the Trustee may rely and shall be protected in acting or
         refraining from acting upon any resolution, Officers' Certificate or
         any other certificate, statement, instrument, opinion, report, notice,
         request, consent, order, bond, debenture, note, coupon, security or

<PAGE>   49

                                       41

         other paper or document believed by it to be genuine and to have been
         signed or presented by the proper party or parties;

                 (b) any request, direction, order or demand of the Issuer
         mentioned herein shall be sufficiently evidenced by an Officers'
         Certificate or order of the Issuer (unless other evidence in respect
         thereof be herein specifically prescribed); and any resolution of the
         Board of Directors may be evidenced to the Trustee by a copy thereof
         certified by the secretary or an assistant secretary of the Issuer;

                 (c) the Trustee may consult with counsel and any advice or
         Opinion of Counsel shall be full and complete authorization and
         protection in respect of any action taken, suffered or omitted to be
         taken by it hereunder in good faith and in accordance with such advice
         or Opinion of Counsel;

                 (d) the Trustee shall be under no obligation to exercise any of
         the trusts, rights or powers vested in it by this Indenture at the
         request, order or direction of any of the Securityholders pursuant to
         the provisions of this Indenture, unless such Securityholders shall
         have offered to the Trustee reasonable security or indemnity against
         the costs, expenses and liabilities which might be incurred therein or
         thereby;

                 (e) the Trustee shall not be liable for any action taken or
         omitted by it in good faith and believed by it to be authorized or
         within the discretion, rights or powers conferred upon it by this
         Indenture;

                 (f) prior to the occurrence of an Event of Default hereunder
         and after the curing or waiving of all Events of Default, the Trustee
         shall not be bound to make any investigation into the facts or matters
         stated in any resolution, certificate, statement, instrument, opinion,
         report, notice, request, consent, order, approval, appraisal, bond,
         debenture, note, coupon, security, or other paper or document unless
         requested in writing so to do by the holders of not less than a
         majority in aggregate principal amount of the Securities of all series
         affected then Outstanding; provided that, if the payment within a
         reasonable time to the Trustee of the costs, expenses or liabilities
         likely to be incurred by it in the making of such investigation is, in
         the opinion of the Trustee, not reasonably assured to the Trustee by
         the security afforded to it by the terms of this Indenture, the Trustee
         may require reasonable indemnity against such expenses or liabilities
         as a

<PAGE>   50

                                       42

         condition to proceeding; the reasonable expenses of every such
         investigation shall be paid by the Issuer or, if paid by the Trustee or
         any predecessor Trustee, shall be repaid by the Issuer upon demand;

                 (g) the Trustee may execute any of the trusts or powers
         hereunder or perform any duties hereunder either directly or by or
         through agents or attorneys not regularly in its employ and the Trustee
         shall not be responsible for any misconduct or negligence on the part
         of any such agent or attorney appointed with due care by it hereunder;
         and

                 (h) the Trustee shall not be deemed to have knowledge or notice
         of any default or Event of Default unless a Responsible Officer has
         actual knowledge thereof or unless the holders of not less than 25% of
         the aggregate principal amount of the then Outstanding Securities of
         any affected series have notified the Trustee thereof.

         SECTION 6.3 Trustee Not Responsible for Recitals, Disposition of
Securities or Application of Proceeds Thereof. The recitals contained herein and
in the Securities, except the Trustee's certificates of authentication, shall be
taken as the statements of the Issuer, and the Trustee assumes no responsibility
for the correctness of the same. The Trustee makes no representation as to the
validity or sufficiency of this Indenture or of the Securities or Coupons. The
Trustee shall not be accountable for the use or application by the Issuer of any
of the Securities or of the proceeds thereof.

         SECTION 6.4 Trustee and Agents May Hold Securities or Coupons;
Collections, etc. The Trustee or any agent of the Issuer or the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
or Coupons with the same rights it would have if it were not the Trustee or such
agent and, subject to Sections 6.8 and 6.13, if operative, may otherwise deal
with the Issuer and receive, collect, hold and retain collections from the
Issuer with the same rights it would have if it were not the Trustee or such
agent.

         SECTION 6.5 Moneys Held by Trustee. Subject to the provisions of
Section 10.4 hereof, all moneys received by the Trustee shall until used or
applied as herein provided, be held in trust for the purposes for which they
were received, but need not be segregated from other funds except

<PAGE>   51

                                       43

to the extent required by mandatory provisions of law. Neither the Trustee nor
any agent of the Issuer or the Trustee shall be under any liability for interest
on any moneys received by it hereunder.

         SECTION 6.6 Compensation and Indemnification of Trustee and Its Prior
Claim. The Issuer covenants and agrees to pay to the Trustee from time to time,
and the Trustee shall be entitled to, reasonable compensation (which shall not
be limited by any provision of law in regard to the compensation of a trustee of
an express trust) and the Issuer covenants and agrees to pay or reimburse the
Trustee and each predecessor Trustee upon its request for all reasonable
expenses, disbursements and advances incurred or made by or on behalf of it in
accordance with any of the provisions of this Indenture (including the
reasonable compensation and the expenses and disbursements of its counsel and of
all agents and other persons not regularly in its employ) except any such
expense, disbursement or advance as may arise from its negligence or bad faith.
The Issuer also covenants to indemnify the Trustee and each predecessor Trustee
for, and to hold it harmless against, any loss, liability or expense incurred
without negligence or bad faith on its part, arising out of or in connection
with the acceptance or administration of this Indenture or the trusts hereunder
and its duties hereunder, including the costs and expenses of defending itself
against or investigating any claim of liability in the premises. The obligations
of the Issuer under this Section to compensate and indemnify the Trustee and
each predecessor Trustee and to pay or reimburse the Trustee and each
predecessor Trustee for expenses, disbursements and advances shall constitute
additional indebtedness hereunder and shall survive the satisfaction and
discharge of this Indenture. Such additional indebtedness shall be a senior
claim to that of the Securities and Coupons upon all property and funds held or
collected by the Trustee as such, except funds held in trust for the benefit of
the holders of particular Securities or Coupons, and the Securities and Coupons
are hereby subordinated to such senior claim.

         SECTION 6.7 Right of Trustee to Rely on Officers' Certificate, etc.
Subject to Sections 6.1 and 6.2, whenever in the administration of the trusts of
this Indenture the Trustee shall deem it necessary or desirable that a matter be
proved or established prior to taking or suffering or omitting any action
hereunder, such matter (unless other evidence in respect thereof be herein
specifically prescribed) may, in the absence of negligence or bad faith on the
part of the Trustee, be deemed

<PAGE>   52

                                       44

to be conclusively proved and established by an Officers' Certificate delivered
to the Trustee, and such certificate, in the absence of negligence or bad faith
on the part of the Trustee, shall be full warrant to the Trustee for any action
taken, suffered or omitted by it under the provisions of this Indenture upon the
faith thereof.

         SECTION 6.8 Qualification of Trustee; Conflicting Interests. (a) If the
Trustee has or shall acquire any conflicting interest, as defined in this
Section, it shall, within 90 days after ascertaining that it has such
conflicting interest, either eliminate such conflicting interest or resign in
the manner and with the effect specified in this Indenture.

         (b) In the event that the Trustee shall fail to comply with the
provisions of subsection (a) of this Section, the Trustee shall, within 10 days
after the expiration of such 90 day period, provide notice of such failure to
the Securityholders in the manner and to the extent required by Section 4.4(c).

         (c) For the purposes of this Section, the Trustee shall be deemed to
have a conflicting interest with respect to Securities of any series if

                 (i) the Trustee is trustee under this Indenture with respect to
         the Outstanding Securities of any other series or is a trustee under
         another indenture under which any other securities, or certificates of
         interest or participation in any other securities, of the Issuer are
         outstanding, unless such other indenture is a collateral trust
         indenture under which the only collateral consists of Securities issued
         under this Indenture and this Indenture with respect to the Securities
         of any other series and there shall also be so excluded any other
         indenture or indentures under which other securities, or certificates
         of interest or participation in other securities, of the Issuer are
         outstanding and this Indenture with respect to the Securities of any
         other series (i) this Indenture is and, if applicable, this Indenture
         and any series issued pursuant to this Indenture and such other
         indenture or indentures are wholly unsecured, and such other indenture
         or indentures are hereafter qualified under the Trust Indenture Act of
         1939, unless the Commission shall have found and declared by order
         pursuant to Section 305(b) or Section, 307(c) of such Trust Indenture
         Act of 1939 that differences exist between the provisions of this
         Indenture with respect to Securities of such series and one or more
         other series, or the provisions of this Indenture and the provisions of
         such other indenture or indentures which are so likely to involve a
         material conflict of interest as to make it necessary

<PAGE>   53

                                       45

         in the public interest or for the protection of investors to disqualify
         the Trustee from acting as such under this Indenture with respect to
         Securities of such series and such other series, or under this
         Indenture or such other indenture or indentures, or (ii) the Issuer
         shall have sustained the burden of proving, on application to the
         Commission and after opportunity for hearing thereon, that trusteeship
         under this Indenture with respect to Securities of such series and such
         other series, or under this Indenture and such other indenture or
         indentures is not so likely to involve a material conflict of interest
         as to make it necessary in the public interest or for the protection of
         investors to disqualify the Trustee from acting as such under this
         Indenture with respect to Securities of such series and such other
         series, or under this Indenture and such other indentures;

                 (ii) the Trustee or any of its directors or executive officers
         is an obligor upon the Securities of any series issued under this
         Indenture or an underwriter for the Issuer;

                 (iii) the Trustee directly or indirectly controls or is
         directly or indirectly controlled by or is under direct or indirect
         common control with the Issuer or an underwriter for the Issuer;

                 (iv) the Trustee or any of its directors or executive officers
         is a director, officer, partner, employee, appointee, or representative
         of the Issuer, or of an underwriter (other than the Trustee itself) for
         the Issuer who is currently engaged in the business of underwriting,
         except that (x) one individual may be a director or an executive
         officer, or both, of the Trustee and a director or an executive
         officer, or both, of the Issuer, but may not be at the same time an
         executive officer of both the Trustee and the Issuer; (y) if and so
         long as the number of directors of the Trustee in office is more than
         nine, one additional individual may be a director or an executive
         officer, or both, of the Trustee and a director of the Issuer; and (z)
         the Trustee may be designated by the Issuer or by any underwriter for
         the Issuer to act in the capacity of transfer agent, registrar,
         custodian, paying agent, fiscal agent, escrow agent, or depositary, or
         in any other similar capacity, or, subject to the provisions of
         subsection (c)(i) of this Section, to act as trustee, whether under all
         indenture or otherwise;

                 (v) 10% or more of the voting securities of the Trustee is
         beneficially owned either by the Issuer or by any director, partner or
         executive officer thereof, or 20% or more of such voting securities

<PAGE>   54

                                       46

         is beneficially owned, collectively, by any two or more of such
         persons; or 10% or more of the voting securities of the Trustee is
         beneficially owned either by an underwriter for the Issuer or by any
         director, partner, or executive officer thereof, or is beneficially
         owned, collectively, by any two or more such persons;

                 (vi) the Trustee is the beneficial owner of, or holds as
         collateral security for an obligation which is in default, (x) 5% or
         more of the voting securities or 10% or more of any other class of
         security of the Issuer, not including the Securities issued under this
         Indenture and securities issued under any other indenture under which
         the Trustee is also trustee, or (y) 10% or more of any class of
         security of an underwriter for the Issuer;

                 (vii) the Trustee is the beneficial owner of, or holds as
         collateral security for an obligation which is in default, 5%. or more
         of the voting securities of any person who, to the knowledge of the
         Trustee, owns 10% or more of the voting securities of, or controls
         directly or indirectly or is under direct or indirect common control
         with, the Issuer;

                 (viii) the Trustee is the beneficial owner of, or holds as
         collateral security for an obligation which is in default, 10% or more
         of any class of security of any person who, to the knowledge of the
         Trustee, owns 50% or more of the voting securities of the Issuer; or

                 (ix) the Trustee owns on May 15 in any calendar year, in the
         capacity of executor, administrator, testamentary or INTER VIVOS
         trustee, guardian, committee or conservator, or in any other similar
         capacity, an aggregate of 25% or more of the voting securities, or of
         any class of security, of any person, the beneficial ownership of a
         specified percentage of which would have constituted a conflicting
         interest under Section 6.8(c)(vi), (vii) or (viii). As to any such
         securities of which the Trustee acquired ownership through becoming
         executor, administrator, or testamentary trustee of an estate which
         included them, the provisions of the preceding sentence shall not
         apply, for a period of two years from the date of such acquisition, to
         the extent that such securities included in such estate do not exceed
         25% of such voting securities or 25% of any such class of security.
         Promptly after May 15 in each calendar year, the Trustee shall make a
         check of its holdings of such securities in any of the above-mentioned
         capacities as of such May 15. If the Issuer

<PAGE>   55

                                       47

         fails to make payment in full of principal of or interest on any of the
         Securities when and as the same becomes due and payable, and such
         failure continues for 30 days thereafter, the Trustee shall make a
         prompt check of its holdings of such securities in any of the
         above-mentioned capacities as of the date of the expiration of such
         30-day period, and after such date, notwithstanding the foregoing
         provisions of this paragraph, all such securities so held by the
         Trustee, with sole or joint control over such securities vested in it,
         shall, but only so long as such failure shall continue, be considered
         as though beneficially owned by the Trustee for the purposes of
         subsections (c)(vi), (vii) and (viii) of this Section.

         The specification of percentages in subsections (c)(v) to (ix)
inclusive of this Section shall not be construed as indicating that the
ownership of such percentages of the securities of a person is or is not
necessary or sufficient to constitute direct or indirect control for the
purposes of subsections (c)(iii) or (vii) of this Section.

         For the purposes of subsections (c)(vi), (vii), (viii) and (ix), of
         this Section, only,

                 (i) the terms "security" and "securities" shall include only
         such securities as are generally known as corporate securities, but
         shall not include any note or other evidence of indebtedness issued to
         evidence an obligation to repay moneys lent to a person by one or more
         banks, trust companies, or banking firms, or any certificate of
         interest or participation in any such note or evidence of indebtedness;

                 (ii) an obligation shall be deemed to be in default when a
         default in payment of principal shall have continued for 30 days or
         more and shall not have been cured; and

                 (iii) the Trustee shall not be deemed to be the owner or holder
         of (x) any security which it holds as collateral security, as trustee
         or otherwise, for an obligation which is not in default as defined in
         clause (ii) above, or (y) any security which it holds as collateral
         security under this Indenture, irrespective of any default hereunder,
         or (z) any security which it holds as agent for collection, or as
         custodian, escrow agent, or depositary, or in any similar
         representative capacity.

         Except as provided above, the word "security" or 'securities' as used
in this Section shall mean any note, stock, treasury stock, bond,

<PAGE>   56

                                       48

debenture, evidence of indebtedness, certificate of interest or participation in
any profit-sharing agreement, collateral trust certificate, preorganization
certificate or subscription, transferable share, investment contract, voting
trust certificate, certificate of deposit for a security, fractional undivided
interest in oil, gas or other mineral rights, or, in general, any interest or
instrument commonly known as a "security", or any certificate of interest or
participation in, temporary or interim certificate for, receipt for, guarantee
of, or warrant or right to subscribe to or purchase, any of the foregoing.

         (d) For purposes of this Section:

                 (i) the term "underwriter" when used with reference to the
         issuer shall mean every person who, within three years prior to the
         time as of which the determination is made, has purchased from the
         Issuer with a view to, or has offered or sold for the Issuer in
         connection with, the distribution of any security of the Issuer
         outstanding at such time, or has participated or has had a direct or
         indirect participation in any such undertaking, or has participated or
         has had a participation in the direct or indirect underwriting of any
         such undertaking, but such term shall not include a person whose
         interest was limited to a commission from an underwriter or dealer not
         in excess of the usual and customary distributors' or sellers'
         commission;

                 (ii) the term "director" shall mean any director of a
         corporation or any individual performing similar functions with respect
         to any organization whether incorporated or unincorporated;

                 (iii) the term "person" shall mean an individual, a
         corporation, a partnership, an association, a joint-stock company, a
         trust, an unincorporated organization, or a government or political
         subdivision thereof; as used in this paragraph, the term "trust" shall
         include only a trust where the interest or interests of the beneficiary
         or beneficiaries are evidenced by a security;

                 (iv) the term "voting security" shall mean any security
         presently entitling the owner or holder thereof to vote in the
         direction or management of the affairs of a person, or any security
         issued under or pursuant to any trust, agreement or arrangement whereby
         a trustee or trustees or agent or agents for the owner or holder of
         such security are presently entitled to vote in the direction or
         management of the affairs of a person;

<PAGE>   57

                                       49

                 (v) the term "Issuer" shall mean any obligor upon the
         Securities; and

                 (vi) the term "executive officer" shall mean the president,
         every vice president, every trust officer, the cashier, the secretary,
         and the treasurer of a corporation, and any individual customarily
         performing similar functions with respect to any organization whether
         incorporated or unincorporated, but shall not include the chairman of
         the board of directors.

         (e) The percentages of voting securities and other securities specified
in this Section shall be calculated in accordance with the following provisions:

                 (i) a specified percentage of the voting securities of the
         Trustee, the Issuer or any other person referred to in this Section
         (each of whom is referred to as a "person" in this paragraph) means
         such amount of the outstanding voting securities of such person as
         entitles the holder or holders thereof to cast such specified
         percentage of the aggregate votes which the holders of all the
         outstanding voting securities of such person are entitled to cast in
         the direction or management of the affairs of such person;

                 (ii) a specified percentage of a class of securities of a
         person means such percentage of the aggregate amount of securities of
         the class outstanding;

                 (iii) the term "amount", when used in regard to securities,
         means the principal amount if relating to evidences of indebtedness,
         the number of shares if relating to capital shares, and the number of
         units if relating to any other kind of security;

                 (iv) the term "outstanding" means issued and not held by or for
         the account of the issuer; the following securities shall not be deemed
         outstanding within the meaning of this definition:

                         (A) securities of an issuer held in a sinking fund
                 relating to securities of the issuer of the same class;

                         (B) securities of an issuer held in a sinking fund
                 relating to another class of securities of the issuer, if the
                 obligation evidenced by such other class of securities is not
                 in default as to principal or interest or otherwise;

<PAGE>   58

                                       50

                         (C) securities pledged by the issuer thereof as
                 security for an obligation of the issuer not in default as to
                 principal or interest or otherwise; and

                         (D) securities held in escrow if placed in escrow by
                 the issuer thereof;

PROVIDED, that any voting securities of an issuer shall be deemed outstanding if
any person other than the issuer is entitled to exercise the voting rights
thereof; and

                 (v) a security shall be deemed to be of the same class as
         another security if both securities confer upon the holder or holders
         thereof substantially the same rights and privileges; PROVIDED, that,
         in the case of secured evidences of indebtedness, all of which are
         issued under a single indenture, differences in the interest rates or
         maturity dates of various series thereof shall not be deemed sufficient
         to constitute such series different classes and PROVIDED, FURTHER,
         that, in the case of unsecured evidences of indebtedness, differences
         in the interest rates or maturity dates thereof shall not be deemed
         sufficient to constitute them securities of different classes, whether
         or not they are issued under a single indenture.

         SECTION 6.9 Persons Eligible for Appointment as Trustee. The Trustee
for each series of Securities hereunder shall at all times be a corporation
organized and doing business under the laws of the United States of America or
of any State or the District of Columbia having a combined capital and surplus
of at least $50,000,000, and which is authorized under such laws to exercise
corporate trust powers and is subject to supervision or examination by Federal,
State or District of Columbia authority. If such corporation publishes reports
of condition at least annually, pursuant to law or to the requirements of the
aforesaid supervising or examining authority, then for the purposes of this
Section, the combined capital and surplus of such corporation shall be deemed to
be its combined capital and surplus as set forth in its most recent report of
condition, so published. In case at any time the Trustee shall cease to be
eligible in accordance with the provisions of this Section, the Trustee shall
resign immediately in the manner and with the effect specified in Section 6.10.

<PAGE>   59

                                       51

         SECTION 6.10 Resignation and Removal; Appointment of Successor Trustee.
(a) The Trustee, or any trustee or trustees hereafter appointed, may at any time
resign with respect to one or more or all series of Securities bygiving written
notice of resignation to the Issuer. Upon receiving such notice of resignation,
the Issuershall promptly appoint a successor trustee or trustees with respect to
the applicable series by written instrument in duplicate, executed by authority
of the Board of Directors, one copy of which instrument shall be delivered to
the resigning Trustee and one copy to the successor trustee or trustees. If no
successor trustee shall have been so appointed with respect to any series and
have accepted appointment within 30 days after the mailing of such notice of
resignation, the resigning trustee may petition any court of competent
jurisdiction for the appointment of a successor trustee, or any Securityholder
who has been a bona fide Holder of a Security or Securities of the applicable
series for at least six months may, subject to the provisions of Section 5.12,
on behalf of himself and all others similarly situated, petition any such court
for the appointment of a successor trustee. Such court may thereupon, after such
notice, if any, as it may deem proper and prescribe, appoint a successor
trustee.

         (b) In case at any time any of the following shall occur:

                 (i) the Trustee shall fail to comply with the provisions of
         Section 6.8 with respect to any series of Securities after written
         request therefor by the Issuer or by any Securityholder who has been a
         bona fide Holder of a Security or Securities of such series for at
         least six months; or

                 (ii) the Trustee shall cease to be eligible in accordance with
         the provisions of Section 6.9 and shall fail to resign after written
         request therefor by the Issuer or by any Securityholder; or

                 (iii) the Trustee shall become incapable of acting with respect
         to any series of Securities, or shall be adjudged a bankrupt or
         insolvent, or a receiver or liquidator of the Trustee or of its
         property shall be appointed, or any public officer shall take charge or
         control of the Trustee or of its property of affairs for the purpose of
         rehabilitation, conservation or liquidation;

then, in any such case, the Issuer may remove the Trustee with respect to the
applicable series of Securities and appoint a successor trustee for such series
by written instrument, in duplicate, executed by order of the Board of Directors
of the Issuer, one copy of which instrument shall be

<PAGE>   60

                                       52

delivered to the Trustee so removed and one copy to the successor trustee, or,
subject to the provisions of Section 5.12, any Securityholder who has been a
bona fide Holder of a Security or Securities of such series for at least six
months may on behalf of himself and all others similarly situated, petition any
court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor trustee with respect to such series. Such court may
thereupon, after such notice, if any, as it may deem proper and prescribe,
remove the Trustee and appoint a successor trustee.

         (c) The Holders of a majority in aggregate principal amount of the
Securities of each series at the time Outstanding may at any time remove the
Trustee with respect to securities of such series and appoint a successor
trustee with respect to the Securities of such series by delivering to the
Trustee so removed, to the successor trustee so appointed and to the Issuer the
evidence provided for in Section 7.1 of the action in that regard taken by the
Securityholders.

         (d) Any resignation or removal of the Trustee with respect to any
series and any appointment of a successor trustee with respect to such series
pursuant to any of the provisions of this Section 6.10 shall become effective
upon acceptance of appointment by the successor trustee as provided in Section
6.11.

         SECTION 6.11 Acceptance of Appointment by Successor Trustee. Any
successor trustee appointed as provided in Section 6.10 shall execute and
deliver to the Issuer and to its predecessor trustee an instrument accepting
such appointment hereunder, and thereupon the resignation or removal of the
predecessor trustee with respect to all or any applicable series shall become
effective and such successor trustee, without any further act, deed or
conveyance, shall become vested with all rights, powers, duties and obligations
with respect to such series of its predecessor hereunder, with like effect as if
originally named as trustee for such series hereunder; but, nevertheless, on the
written request of the Issuer or of the successor trustee, upon payment of its
charges then unpaid, the trustee ceasing to act shall, subject to Section 10.4,
pay over to the successor trustee all moneys at the time held by it hereunder
and shall execute and deliver all instrument transferring to such successor
trustee all such rights, powers, duties and obligations. Upon request of any
such successor trustee, the Issuer shall execute any and all instruments in
writing for more fully and certainly vesting in and

<PAGE>   61

                                       53

confirming to such successor trustee all such rights and powers. Any trustee
ceasing to act shall, nevertheless, retain a prior claim upon all property or
funds held or collected by such trustee to secure any amounts then due it
pursuant to the provisions of Section 6.6.

         If a successor trustee is appointed with respect to the Securities of
one or more (but not all) series, the Issuer, the predecessor Trustee and each
successor trustee with respect to the Securities of any applicable series shall
execute and deliver an indenture supplemental hereto which shall contain such
provisions as shall be deemed necessary or desirable to confirm that all the
rights, powers, trusts and duties of the predecessor Trustee with respect to the
Securities of any series as to which the predecessor Trustee is not retiring
shall continue to be vested in the predecessor Trustee, and shall add to or
change any of the provisions of this Indenture as shall be necessary to provide
for or facilitate the administration of the trusts hereunder by more than one
trustee, it being understood that nothing herein or in such supplemental
indenture shall constitute such trustees or co-trustees of the same trust and
that each such trustee shall be trustee of a trust or trusts under separate
indentures.

         No successor trustee with respect to any series of Securities shall
accept appointment as provided in this Section 6.11 unless at the time of such
acceptance such successor trustee shall be qualified under the provisions of
Section 6.8 and eligible under the provisions of Section 6.9.

         Upon acceptance of appointment by any successor trustee as provided in
this Section 6.11, the Issuer shall mail notice thereof (a) if any Unregistered
Securities of a series affected are then Outstanding, to the Holders thereof, by
publication of such notice at least once in an Authorized Newspaper in London
(and, if required by Section 3.8, at least once in an Authorized Newspaper in
Luxembourg), (b) if any Unregistered Securities of a series affected are then
Outstanding, to the Holders thereof who have filed their names and addresses
with the Trustee pursuant to Section 4.4(c)(ii), by mailing such notice to such
holders at such addresses as were so furnished to the Trustee (and the Trustee
shall make such information available to the Issuer for such purpose) and (c) to
the Holders of Registered Securities of each series affected, by first-class
mail to such Holders of Securities of any series for which such successor
trustee is acting as trustee at their last addresses as they shall appear in the
Security register. If the Issuer fails to mail such notice within ten days after
acceptance of appointment by the successor trustee,

<PAGE>   62

                                       54

the successor trustee shall cause such notice to be mailed at the expense of
the Issuer.

         SECTION 6.12. Merger, Conversion, Consolidation or Succession to
Business of Trustee. Any corporation into which the Trustee may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Trustee shall be a
party, or any corporation succeeding to the corporate trust business of the
Trustee, shall be the successor of the Trustee hereunder, provided that such
corporation shall be qualified under the provisions of Section 6.8 and eligible
under the provisions of Section 6.9, without the execution or filing of any
paper or any further act on the part of any of the parties hereto, anything
herein to the contrary notwithstanding.

         In case at the time such successor to the Trustee shall succeed to the
trusts created by this Indenture any of the Securities of any series shall have
been authenticated but not delivered, any such successor to the Trustee may
adopt the certificate of authentication of any predecessor Trustee and deliver
such Securities so authenticated; and, in case at that time any of the
Securities of any series shall not have been authenticated, any successor to the
Trustee may authenticate such Securities either in the name of any predecessor
hereunder or in the name of the successor Trustee; and in all such cases such
certificate shall have the full force which it is anywhere in the Securities of
such series or in this Indenture provided that the certificate of the Trustee
shall have; PROVIDED, that the right to adopt the certificate of authentication
of any predecessor Trustee or to authenticate Securities of any series in the
name of any predecessor Trustee shall apply only to its successor or successors
by merger, conversion or consolidation.

         SECTION 6.13 Preferential Collection of Claims Against the Issuer. (a)
Subject to the provisions of this Section, if the Trustee shall be or shall
become a creditor, directly or indirectly, secured or unsecured, of the Issuer
within four months prior to a default, as defined in subsection (c) of this
Section, or subsequent to such a default, then, unless and until such default
shall be cured, the Trustee shall set apart and hold in a special account for
the benefit of the Trustee individually, the Holders of the Securities and the
Holders of other indenture securities (as defined in this Section):

                 (1) an amount equal to any and all reductions in the amount
         due and owing upon any claim as such creditor in respect of principal
         or

<PAGE>   63

                                       55

         interest, effected after the beginning of such four months' period and
         valid as against the Issuer and its other creditors, except any such
         reduction resulting from the receipt or disposition of any property
         described in subsection (a)(2) of this Section, or from the exercise of
         any right of set-off which the Trustee could have exercised if a
         petition in bankruptcy had been filed by or against the Issuer upon the
         date of such default; and

                 (2) all property received by the Trustee in respect of any
         claim as such creditor, either as security therefor, or in satisfaction
         or composition thereof, or otherwise, after the beginning of such four
         months' period, or an amount equal to the proceeds of any such
         property, if disposed of, subject, however, to the rights, if any, of
         the Issuer and its other creditors in such property or such proceeds.

         Nothing herein contained, however, shall affect the right of the
         Trustee:

                 (A) to retain for its own account (i) payments made on account
         of any such claim by any person (other than the Issuer) who is liable
         thereon, (ii) the proceeds of the bona fide sale of any such claim by
         the Trustee to a third person, and (iii) distributions made in cash,
         securities or other property in respect of claims filed against the
         Issuer in bankruptcy or receivership or in proceedings for
         reorganization pursuant to Title 11 of the United States Code or
         applicable state law;

                 (B) to realize, for its own account, upon any property held by
         it as security for any such claim, if such property was so held prior
         to the beginning of such four months' period;

                 (C) to realize, for its own account, but only to the extent of
         the claim hereinafter mentioned, upon any property held by it as
         security for any such claim, if such claim was created after the
         beginning of such four months' period and such property was received as
         security therefor simultaneously with the creation thereof, and if the
         Trustee shall sustain the burden of proving that at the time such
         property was so received the Trustee had no reasonable cause to believe
         that a default as defined in subsection (c) of this Section would occur
         within four months; or

                 (D) to receive payment on any claim referred to in paragraph
         (B) or (C), against the release of any property held as security for
         such claim as provided in such paragraph (B) or (C), as the case may
         be, to the extent of the fair value of such property.

<PAGE>   64

                                       56

         For the purposes of paragraphs (B), (C) and (D), property substituted
after the beginning of such four months' period for property held as security at
the time of such substitution shall, to the extent of the fair value of the
property released, have the same status as the property released, and, to the
extent that any claim referred to in any of such paragraphs is created in
renewal of or in substitution for or for the purpose of repaying or refunding
any pre-existing claim of the Trustee as such creditor, such claim shall have
the same status as such pre-existing claim.

         If the Trustee shall be required to account, the funds and property
held in such special account and the proceeds thereof shall be apportioned
between the Trustee, the Securityholders and the Holders of other indenture
securities in such manner that the Trustee, such Securityholders and the holders
of other indenture securities realize, as a result of payments from such special
account and payments of dividends on claims filed against the Issuer in
bankruptcy or receivership or in proceedings for reorganization pursuant to
Title 11 of the United States Code or applicable State law, the same percentage
of their respective claims, figured before crediting to the claim of the Trustee
anything on account of the receipt by it from the Issuer of the funds and
property in such special account and before crediting to the respective claims
of the Trustee, such Securityholders and the holders of other indenture
securities dividends on claims filed against the Issuer in bankruptcy or
receivership or in proceedings for reorganization pursuant to Title 11 of the
United States Code or applicable State law, but after crediting thereon receipts
on account of the indebtedness represented by their respective claims from all
sources other than from such dividends and from the funds and property so held
in such special account. As used in this paragraph, with respect to any claim,
the term "dividends" shall include any distribution with respect to such claim,
in bankruptcy or receivership or in proceedings for reorganization pursuant to
Title 11 of the United States Code or applicable State law, whether such
distribution is made in cash, securities or other property, but shall not
include any such distribution with respect to the secured portion, if any, of
such claim. The court in which such bankruptcy, receivership or proceeding for
reorganization is pending shall have jurisdiction (i) to apportion between the
Trustee, such Securityholders and the holders of other indenture securities, in
accordance with the provisions of this paragraph, the funds and property held in
such special account and the proceeds thereof, or (ii) in lieu of such
apportionment, in whole or in part, to give to the

<PAGE>   65

                                       57

provisions of this paragraph due consideration in determining the fairness of
the distributions to be made to the Trustee, such Securityholders and the
holders of other indenture securities with respect to their respective claims,
in which event it shall not be necessary to liquidate or to appraise the value
of any securities or other property held in such special account or as security
for any such claim, or to make a specific allocation of such distributions as
between the secured and unsecured portions of such claims, or otherwise to apply
the provisions of this paragraph as a mathematical formula.

         Any Trustee who has resigned or been removed after the beginning of
such four months' period shall be subject to the provisions of this subsection
(a) as though such resignation or removal had not occurred. If any Trustee has
resigned or been removed prior to the beginning of such four months' period, it
shall be subject to the provisions of this subsection (a) if and only if the
following conditions exist:

                 (i) the receipt of property or reduction of claim which would
         have given rise to the obligation to account, if such Trustee had
         continued as trustee, occurred after the beginning of such four months'
         period; and

                 (ii) such receipt of property or reduction of claim occurred
         within four months after such resignation or removal.

         (b) There shall be excluded from the operation of this Section a
         creditor relationship arising from

                 (1) the ownership or acquisition of securities issued under any
         indenture, or any security or securities having a maturity of one year
         or more at the time of acquisition by the Trustee;

                 (2) advances authorized by a receivership or bankruptcy court
         of competent jurisdiction or by this Indenture for the purpose of
         preserving any property which shall at any time be subject to the lien
         of this Indenture or of discharging tax liens or other prior liens or
         encumbrances thereon, if notice of such advance and of the
         circumstances surrounding the making thereof is given to the
         Securityholders at the time and in the manner provided in this
         Indenture;

                 (3) disbursements made in the ordinary course of business in
         the capacity of trustee under an indenture, transfer agent, registrar,
         custodian, paying agent, fiscal agent or depositary, or other similar
         capacity;

<PAGE>   66

                                       58

                 (4) an indebtedness created as a result of services rendered or
         premises rented or an indebtedness created as a result of goods or
         securities sold in a cash transaction as defined in subsection (c)(3)
         below;

                 (5) the ownership of stock or of other securities of a
         corporation organized under the provisions of Section 25(a) of the
         Federal Reserve Act, as amended, which is directly or indirectly a
         creditor of the Issuer; or

                 (6) the acquisition, ownership, acceptance or negotiation of
         any drafts, bills of exchange, acceptances or obligations which fall
         within the classification of self-liquidating paper as defined in
         subsection (c)(4) of this Section.

         (c) As used in this Section:

                 (1) the term "default" shall mean any failure to make payment
         in full of the principal of or interest upon any of the Securities or
         upon the other indenture securities when and as such principal or
         interest becomes due and payable;

                 (2) the term "other indenture securities" shall mean securities
         upon which the Issuer is an obligor (as defined in the Trust Indenture
         Act of 1939) outstanding under any other indenture (i) under which the
         Trustee is also trustee, (ii) which contains provisions substantially
         similar to the provisions of subsection (a) of this Section, and (iii)
         under which a default exists at the time of the apportionment of the
         funds and property held in said special account;

                 (3) the term "cash transaction" shall mean any transaction in
         which full payment for goods or securities sold is made within seven
         days after delivery of the goods or securities in currency or in checks
         or other orders drawn upon banks or bankers and payable upon demand

                 (4) the term "self-liquidating paper" shall mean any draft,
         bill of exchange, acceptance or obligation which is made, drawn,
         negotiated or incurred by the Issuer for the purpose of financing the
         purchase, processing, manufacture, shipment, storage or sale of goods,
         wares or merchandise and which is secured by documents evidencing title
         to, possession of, or a lien upon the goods, wares or merchandise or
         the receivables or proceeds arising from the sale of the goods, wares
         or merchandise previously constituting the secu-

<PAGE>   67

                                       59

         rity, provided the security is received by the Trustee simultaneously
         with the creation of the creditor relationship with the Issuer arising
         from the making, drawing, negotiating or incurring of the draft, bill
         of exchange, acceptance or obligation; and

                 (5) the term "Issuer" shall mean any obligor upon the
                     Securities.

                                  ARTICLE SEVEN

                         CONCERNING THE SECURITYHOLDERS

         SECTION 7.1 Evidence of Action Taken by Securityholders. Any request,
demand, authorization, direction, notice, consent, waiver or other action
provided by this Indenture to be given or taken by a specified percentage in
principal amount of the Securityholders of any or all series may be embodied in
and evidenced by one or more instruments of substantially similar tenor signed
by such specified percentage of Securityholders in person or by agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee. Proof of execution of any instrument or of a writing appointing
any such agent shall be sufficient for any purpose of this Indenture and
(subject to Sections 6.1 and 6.2) conclusive in favor of the Trustee and the
Issuer, if made in the manner provided in this Article.

         SECTION 7.2 Proof of Execution of lnstruments and of Holding of
Securities. Subject to Sections 6.1 and 6.2, the execution of any instrument by
a Securityholder or his agent or proxy may be proved in the following manner:

                 The fact and date of the execution by any Holder of any
         instrument may be proved by the certificate of any notary public or
         other officer of any jurisdiction authorized to take acknowledgments of
         deeds or administer oaths that the person executing such instruments
         acknowledged to him the execution thereof, or by an affidavit of a
         witness to such execution sworn to before any such notary or other such
         officer. Where such execution is by or on behalf of any legal entity
         other than an individual, such certificate or affidavit shall also
         constitute sufficient proof of the authority of the person executing
         the same. The fact of the holding by any Holder

<PAGE>   68

                                       60

         of an Unregistered Security of any series, and the identifying number
         of such Security and the date of his holding the same, may be proved by
         the production of such Security or by a certificate executed by any
         trust company, bank, banker or recognized securities dealer wherever
         situated satisfactory to the Trustee, if such certificate shall be
         deemed by the Trustee to be satisfactory. Each such certificate shall
         be dated and shall state that on the date thereof a Security of such
         series bearing a specified identifying number was deposited with or
         exhibited to such trust company, bank, banker or recognized securities
         dealer by the person named in such certificate. Any such certificate
         may be issued in respect of one or more Unregistered Securities of one
         or more series specified therein. The holding by the person named in
         any such certificate of any Unregistered Securities of any series
         specified therein shall be presumed to continue for a period of one
         year from the date of such certificate unless at the time of any
         determination of such holding (1) another certificate bearing a later
         date issued in respect of the same Securities shall be produced, or (2)
         the Security of such series specified in such certificate shall be
         produced by some other person, or (3) the Security of such series
         specified in such certificate shall have ceased to be Outstanding.
         Subject to Sections 6.1 and 6.2, the fact and date of the execution of
         any such instrument and the amount and numbers of Securities of any
         series held by the person so executing such instrument and the amount
         and numbers of any Security or Securities for such series may also be
         proven in accordance with such reasonable rules and regulations as may
         be prescribed by the Trustee for such series or in any other manner
         which the Trustee for such series may deem sufficient.

         SECTION 7.3  Holders to be Treated as Owners.  The Issuer, the Trustee
and any agent of the Issuer or the Trustee may deem and treat the person in
whose name any Security shall be registered upon the Security register for such
series as the absolute owner of such Security (whether or not such Security
shall be overdue and not withstanding any notation of ownership or other
writing thereon) for the purpose of receiving payment of or on account of the
principal of and, subject to the provisions of this Indenture, interest on such
Security and for all other purposes; and neither the Issuer nor the Trustee nor
any agent of the Issuer or the Trustee shall be affected by any notice to the
contrary. The

<PAGE>   69

                                       61

Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the
Holder of any Unregistered Security and the Holder of any Coupon as the absolute
owner of such Unregistered Security or Coupon (whether or not such Unregistered
Security or Coupon shall be overdue) for the purpose of receiving payment
thereof or on account thereof and for all other purposes and neither the Issuer,
the Trustee, nor any agent of the Issuer or the Trustee shall be affected by any
notice to the contrary. All such payments so made to any such person, or upon
his order, shall be valid, and, to the extent of the sum or sums so paid,
effectual to satisfy and discharge the liability for moneys payable upon any
such Security or Coupon.

         SECTION 7.4 Securities Owned by Issuer Deemed Not Outstanding. In
determining whether the Holders of the requisite aggregate principal amount of
Outstanding Securities of any or all series have concurred in any direction,
consent or waiver under this Indenture, Securities which are owned by the Issuer
or any other obligor on the Securities with respect to which such determination
is being made or by any person directly or indirectly controlling or controlled
by or under direct or indirect common control with the Issuer or any other
obligor on the Securities with respect to which such determination is being made
shall be disregarded and deemed not to be Outstanding for the purpose of any
such determination, except that for the purpose of determining whether the
Trustee shall be protected in relying on any such direction, consent or waiver
only Securities which the Trustee knows are so owned shall be so disregarded.
Securities so owned which have been pledged in good faith may be regarded as
Outstanding if the pledgee establishes to the satisfaction of the Trustee the
pledgee's right so to act with respect to such Securities and that the pledgee
is not the Issuer or any other obligor upon the Securities or any person
directly or indirectly controlling or controlled by or under direct or indirect
common control with the Issuer or any other obligor on the Securities. In case
of a dispute as to such right, the advice of counsel shall be full protection in
respect of any decision made by the Trustee in accordance with such advice. Upon
request of the Trustee, the Issuer shall furnish to the Trustee promptly a
written statement by two of its officers (which need not comply with Section
11.5) listing and identifying all Securities, if any, known by the Issuer to be
owned or held by or for the account of any of the above-described persons; and,
subject to Sections 6.1 and 6.2, the Trustee shall be entitled to accept such
Officers' Certificate as conclusive evidence of the facts therein set

<PAGE>   70

                                       62

forth and of the fact that all Securities not listed therein are Outstanding for
the purpose of any such determination.

         SECTION 7.5 Right of Revocation of Action Taken. At any time prior to
(but not after) the evidencing to the Trustee, as provided in Section 7.1, of
the taking of any action by the Holders of the percentage in aggregate principal
amount of the Securities of any or all series, as the case may be, specified in
this Indenture in connection with such action, any Holder of a Security the
serial number of which is shown by the evidence to be included among the serial
numbers of the Securities the Holders of which have consented to such action
may, by filing written notice at the Corporate Trust Office and upon proof of
holding as provided in this Article, revoke such action so far as concerns such
Security. Except as aforesaid any such action taken by the Holder of any
Security shall be conclusive and binding upon such Holder and upon all future
Holders and owners of such Security and of any Securities issued in exchange or
substitution therefor, irrespective of whether or not any notation in regard
thereto is made upon any such Security. Any action taken by the Holders of the
percentage in aggregate principal amount of the Securities of any or all series,
as the case may be, specified in this Indenture in connection with such action
shall be conclusively binding upon the Issuer, the Trustee and the Holders of
all the Securities affected by such action.

                                  ARTICLE EIGHT

                             SUPPLEMENTAL INDENTURES

         SECTION 8.1 Supplemental Indentures Without Consent of Securityholders.
The Issuer, when authorized by a resolution of its Board of Directors, and the
Trustee may from time to time and at any time enter into an indenture or
indentures supplemental hereto (which shall conform to the provisions of the
Trust Indenture Act of 1939 as in force at the date of the execution thereof)
for one or more of the following purposes:

                 (a) to convey, transfer, assign, mortgage or pledge to the
         Trustee as security for the Securities of one or more series any
         property or assets;

                 (b) to evidence the succession of another corporation to the
         Issuer, or successive successions, and the assumption by the successor
         corporation of the covenants, agreements and obligations of the Issuer
         pursuant to Article Nine;

<PAGE>   71

                                       63

                 (c) to add to the covenants of the Issuer such further
         covenants, restrictions, conditions or provisions as its Board of
         Directors and the Trustee shall consider to be for the protection of
         the Holders of Securities or Coupons, and to make the occurrence, or
         the occurrence and continuance, of a default in any such additional
         covenants, restrictions, conditions or provisions an Event of Default
         permitting the enforcement of all or any of the several remedies
         provided in this Indenture as herein set forth; PROVIDED, that in
         respect of any such additional covenant, restriction, condition or
         provision such supplemental indenture may provide for a particular
         period of grace after default (which period may be shorter or longer
         than that allowed in the case of other defaults) or may provide for an
         immediate enforcement upon such an Event of Default or may limit the
         remedies available to the Trustee upon such an Event of Default or may
         limit the right of the Holders of a majority in aggregate principal
         amount of the Outstanding Securities of such series to waive such an
         Event of Default;

                 (d) to cure any ambiguity or to correct or supplement any
         provision contained herein or in any supplemental indenture which may
         be defective or inconsistent with any other provision contained herein
         or in any supplemental indenture; or to make such other provisions in
         regard to matters or questions arising under this Indenture or under
         any supplemental indenture as the Board of Directors may deem necessary
         or desirable and which shall not adversely affect the interests of the
         Holders of the Securities;

                 (e) to provide for the issuance under this Indenture of
         Securities in coupon form (including Securities registrable as to
         principal only) and to provide for exchangeability of such Securities
         with Securities issued hereunder in fully registered form, and to make
         all appropriate changes for such purpose; and

                 (f) to evidence and provide for the acceptance of appointment
         hereunder by a successor trustee with respect to the Securities of one
         or more series, or of the Coupons appertaining to such Securities, and
         to add to or change any of the provisions of this Indenture as shall be
         necessary to provide for or facilitate the administration of the trusts
         hereunder by more than one trustee, pursuant to the requirements of
         Section 6.11.

         The Trustee is hereby authorized to join with the Issuer in the
execution of any such supplemental indenture, to make any further

<PAGE>   72

                                       64

appropriate agreements and stipulations which may be therein contained and to
accept the conveyance, transfer, assignment, mortgage or pledge of any property
thereunder, but the Trustee shall not be obligated to enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

         Any supplemental indenture authorized by the provisions of this Section
may be executed without the consent of the Holders of any of the Securities at
the time Outstanding, notwithstanding any of the provisions of Section 8.2.

         SECTION 8.2 Supplemental Indentures With Consent of Securityholders.
With the consent (evidenced as provided in Article Seven) of the Holders of not
less than 66 2/3% in aggregate principal amount of the Securities at the time
Outstanding of all series affected by such supplemental indenture (voting as one
class), the Issuer, when authorized by a resolution of its Board of Directors,
and the Trustee may, from time to time and at any time, enter into an indenture
or indentures supplemental hereto (which shall conform to the provisions of the
Trust Indenture Act of 1939 as in force at the date of execution thereof) for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of this Indenture or of any supplemental indenture or of
modifying in any manner the rights of the Holders of the Securities of each such
series or the coupons appertaining to such Securities; provided, that no such
supplemental indenture shall (a) extend the final maturity of any Security, or
reduce the principal amount thereof or the method in which amounts of payments
of principal or interest thereon are determined, or reduce the rate or extend
the time of payment of interest thereon, or change the coin, or currency or
units based on or related to currencies (including ECU) of payment thereof, or
reduce any amount payable on redemption thereof or reduce the amount of the
principal of an Original Issue Discount Security that would be due and payable
upon an acceleration of the maturity thereof pursuant to Section 5.1 or the
amount thereof provable in bankruptcy pursuant to Section 5.2, or impair or
affect the right of any Securityholder to institute suit for the payment thereof
or, if the Securities provide therefor, any right of repayment at the option of
the Securityholder without the consent of the Holder of each Security so
affected, or (b) reduce the aforesaid percentage of Securities of any series,
the consent of the Holders of which is required for any such supplemental
indenture, without the consent of the Holders of each Security so affected.

<PAGE>   73

                                       65

         Upon the request of the Issuer, accompanied by a copy of a resolution
of the Board of Directors certified by the secretary or an assistant secretary
of the Issuer authorizing the execution of any such supplemental indenture, and
upon the filing with the Trustee of evidence of the consent of Securityholders
as aforesaid and other documents, if any, required by Section 7.1, the Trustee
shall join with the Issuer in the execution of such supplemental indenture
unless such supplemental indenture affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise, in which case the Trustee may in
its discretion, but shall not be obligated to, enter into such supplemental
indenture.

         It shall not be necessary for the consent of the Securityholders under
this section to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such consent shall approve the
substance thereof.

         Promptly after the execution by the Issuer and the Trustee of any
supplemental indenture pursuant to the provisions of this Section, the Issuer
shall mail a notice thereof (i) by first class mail to the Holders of then
Outstanding Registered Securities of each series affected thereby at their
addresses as they shall appear on the registry books of the Issuer, (ii) if any
Unregistered Securities of a series affected thereby are then Outstanding, to
the Holders thereof who have filed their names and addresses with the Trustee
pursuant to section 4.4(c)(ii), by mailing a notice thereof by first class mail
to such Holders at such addresses as were so furnished to the Trustee and (iii)
if any Unregistered Securities of a series affected thereby are then
Outstanding, to all holders thereof, by publication of a notice thereof at least
once in an Authorized ~newspaper in London (and, if required by Section 3.6, at
least once in an Authorized Newspaper in Luxembourg), and in each case such
notice shall set forth in general terms the substance of such supplemental
indenture. Any failure of the Issuer to mail such notice, or any defect therein,
shall not, however, in any way impair or affect the validity of any such
supplemental indenture.

         SECTION 8.3 Effect of Supplemental Indenture. Upon the execution of any
supplemental indenture pursuant to the provisions hereof, this Indenture shall
be and be deemed to be modified and amended in accordance therewith and the
respective rights, limitations of rights, obligations, duties and immunities
under this Indenture of the Trustee,

<PAGE>   74

                                       66

the Issuer and the Holders of Securities of each series affected thereby shall
thereafter be determined, exercised and enforced hereunder subject in all
respects to such modifications and amendments, and all the terms and conditions
of any such supplemental indenture shall be and be deemed to be part of the
terms and conditions of this Indenture for any and all purposes.

         SECTION 8.4 Documents to Be Given to Trustee. The Trustee, subject to
the provisions of Sections 6.1 and 6.2, may receive an Officers' Certificate and
an Opinion of Counsel as conclusive evidence that any supplemental indenture
executed pursuant to this Article 8 complies with the applicable provisions of
this Indenture.

         SECTION 8.5 Notation on Securities in Respect of Supplemental
Indentures. Securities of any series authenticated and delivered after the
execution of any supplemental indenture pursuant to the provisions of this
Article may bear a notation in form approved by the Trustee for such series as
to any matter provided for by such supplemental indenture or as to any action
taken at any such meeting. If the Issuer or the Trustee shall so determine, new
Securities of any series so modified as to conform, in the opinion of the
Trustee and the Board of Directors, to any modification of this Indenture
contained in any such supplemental indenture may be prepared by the Issuer,
authenticated by the Trustee and delivered in exchange for the Securities of
such series then Outstanding.

                                  ARTICLE NINE

                    CONSOLIDATION, MERGER, SALE OR CONVEYANCE

         SECTION 9.1 Issuer May Consolidate, etc., on Certain Terms. The Issuer
covenants that it will not merge or consolidate with any other corporation or
sell or convey all or substantially all of its assets to any Person, unless (i)
either the Issuer shall be the continuing corporation, or the successor
corporation or the Person which acquires by sale or conveyance substantially all
the assets of the Issuer (if other than the Issuer) shall be a corporation
organized under the laws of the United States of America or any State thereof
and shall expressly assume the due and punctual payment of the principal of and
interest on all the Securities and Coupons, according to their tenor, and the
due and

<PAGE>   75

                                       67

punctual performance and observance of all of the covenants and conditions of
this Indenture to be performed or observed by the Issuer, by supplemental
indenture satisfactory to the Trustee, executed and delivered to the Trustee by
such corporation, and (ii) the Issuer or such successor corporation, as the case
may be, shall not, immediately after such merger or consolidation, or such sale
or conveyance, be in default in the performance of any such covenant or
condition.

         SECTION 9.2 Successor Corporation Substituted. In case of any such
consolidation, merger, sale or conveyance, and following such an assumption by
the successor corporation, such successor corporation shall succeed to and be
substituted for the Issuer, with the same effect as if it had been named herein.
Such successor corporation may cause to be signed, and may issue either in its
own name or in the name of the Issuer prior to such succession any or all of the
Securities issuable hereunder, together with any Coupons appertaining thereto,
which theretofore shall not have been signed by the Issuer and delivered to the
Trustee; and, upon the order of such successor corporation instead of the Issuer
and subject to all the terms, conditions and limitations in this Indenture
prescribed, the Trustee shall authenticate and shall deliver any Securities,
together with any Coupons appertaining thereto, which previously shall have been
signed and delivered by the officers of the Issuer to the Trustee for
authentication, and any Securities, together with any Coupons appertaining
thereto, which such successor corporation thereafter shall cause to be signed
and delivered to the Trustee for that purpose. All of the Securities, together
with any Coupons appertaining thereto, so issued shall in all respects have the
same legal rank and benefit under this Indenture as the Securities, together
with any Coupons appertaining thereto, theretofore or thereafter issued in
accordance with the terms of this Indenture as though all of such Securities and
Coupons had been issued at the date of the execution hereof.

         In case of any such consolidation, merger, sale, lease or conveyance
such changes in phraseology and form (but not in substance) may be made in the
Securities and Coupons thereafter to be issued as may be appropriate.

         In the event of any such sale or conveyance (other than a conveyance by
way of lease) the Issuer or any successor corporation which shall theretofore
have become such in the manner described in this Article shall be discharged
from all obligations and covenants under this Indenture and the Securities and
may be liquidated and dissolved.

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                                       68

         SECTION 9.3 Opinion of Counsel to Trustee. The Trustee, subject to the
provisions of Sections 6.1 and 6.2, may receive an Opinion of Counsel, prepared
in accordance with Section 11.5, as conclusive evidence that any such
consolidation, merger, sale, lease or conveyance, and any such assumption, and
any such liquidation or dissolution, complies with the applicable provisions of
this Indenture.

                                   ARTICLE TEN

                    SATISFACTION AND DISCHARGE OR INDENTURE;
                                UNCLAIMED MONEYS.

         SECTION 10.1 Satisfaction and Discharge of Indenture. (A) If at any
time (a) the Issuer shall have paid or caused to be paid the principal of and
interest on all the Securities of any series Outstanding hereunder and all
unmatured Coupons appertaining thereto (other than Securities or Coupons which
have been destroyed, lost or stolen and which have been replaced or paid as
provided in Section 2.9) as and when the same shall have become due and payable,
or (b) the Issuer shall have delivered to the Trustee for cancellation all
Securities of any series theretofore authenticated and all unmatured Coupons
appertaining thereto (other than any Securities or Coupons of such series which
shall have been destroyed, lost or stolen and which shall have been replaced or
paid as provided in Section 2.9) or (c) (i) all the Securities of such series
not theretofore delivered to the Trustee for cancellation shall have become due
and payable, or are by their terms to become due and payable within one year or
are to be called for redemption within one year under arrangements satisfactory
to the Trustee for the giving of notice of redemption, and (ii) the Issuer shall
have irrevocably deposited or caused to be deposited with the Trustee as trust
funds the entire amount in cash (other than moneys repaid by the Trustee or any
paying agent to the Issuer in accordance with Section 10.4) or U.S. Government
Obligations, maturing as to principal and interest in such amounts and at such
times as will insure the availability of cash (without consideration of any
reinvestment of such principal or interest), or a combination of U.S. Government
Obligations and cash sufficient to pay at maturity or upon redemption all
Securities of such series and all unmatured Coupons appertaining thereto (other
than any Securities or Coupons of such series which shall have been destroyed,
lost or stolen and which shall have been

<PAGE>   77

                                       69

replaced or paid as provided in Section 2.9) not theretofore delivered to the
Trustee for cancellation, including principal and interest due or to become due
to such date of maturity as the case may be, and if, in any such case, the
Issuer shall also pay or cause to be paid all other sums payable hereunder by
the Issuer with respect to Securities of such series and Coupons appertaining
thereto, then this Indenture shall cease to be of further effect with respect to
Securities of such series and Coupons appertaining thereto (except as to (i)
rights of registration of transfer and exchange, and the Issuer's right of
optional redemption, (ii) substitution of mutilated, defaced, destroyed, lost or
stolen Securities or Coupons, (iii) rights of holders of Securities and Coupons
appertaining thereto to receive payments of principal thereof and interest
thereon, upon the original stated due dates therefor (but not upon acceleration)
and remaining rights of the holders to receive mandatory sinking fund payments,
if any, (iv) the rights, obligations, duties and immunities of the Trustee
hereunder, including those under Section 6.6, (v) the rights of the
Securityholders of such series as beneficiaries hereof with respect to the
property so deposited with the Trustee payable to all or any of them, and (vi)
the obligations of the Issuer under Section 3.2) and the Trustee, on demand of
the Issuer accompanied by an Officers' Certificate and an Opinion of Counsel and
at the cost and expense of the Issuer, shall execute proper instruments
acknowledging such satisfaction of and discharging this Indenture with respect
to such series; PROVIDED, that the rights of Holders of the Securities and
Coupons to receive amounts in respect of principal of and interest on the
Securities and Coupons held by them shall not be delayed longer than required by
then-applicable mandatory rules or policies of any securities exchange upon
which the Securities are listed. The Issuer agrees to reimburse the Trustee for
any costs or expenses thereafter reasonably and properly incurred and to
compensate the Trustee for any services thereafter reasonably and properly
rendered by the Trustee in connection with this Indenture or the Securities and
Coupons of such series.

         (B) The following provisions shall apply to the Securities of each
series unless specifically otherwise provided in a Board Resolution, Officers'
Certificate or indenture supplemental hereto provided pursuant to Section 2.3.
In addition to discharge of the Indenture pursuant to the next preceding
paragraph, the Issuer shall be deemed to have paid and discharged the entire
indebtedness on all the Securities of a series and Coupons appertaining thereto
on the 121st day after the date of the

<PAGE>   78

                                       70

deposit referred to in subparagraph (a) below, and the provisions of this
Indenture with respect to the Securities of such series and Coupons appertaining
thereto shall no longer be in effect (except as to (i) rights of registration of
transfer and exchange of Securities of such series, and of Coupons appertaining
thereto, (ii) substitution of apparently mutilated, defaced, destroyed, lost or
stolen Securities or Coupons, (iii) rights of holders of Securities and Coupons
appertaining thereto to receive, from the trust fund described in subparagraph
(a) below, payments of principal thereof and interest thereon, upon the original
stated due dates therefor (but not upon acceleration) and remaining rights of
the holders to receive sinking fund payments, if any, (iv) the rights,
obligation, duties and immunities of the Trustee hereunder, including those
under Section 6.6, (v) the rights of the holders of Securities of such series
and Coupons appertaining thereto as beneficiaries hereof with respect to the
property so deposited with the Trustee payable to all or any of them and (vi)
the obligations of the Issuer under Section 3.2) and the Trustee, at the expense
of the Issuer, shall at the Issuer's request, execute proper instruments
acknowledging the same, if

                 (a) with reference to this provision the Issuer has irrevocably
         deposited or caused to be irrevocably deposited with the Trustee as
         trust funds in trust, specifically pledged as security for, and
         dedicated solely to, the benefit of the holders of the Securities of
         such series and Coupons appertaining thereto (i) cash, or (ii) U.S.
         Government Obligations, maturing as to principal and interest at such
         times and in such amounts as will insure the availability of cash or
         (iii) a combination thereof, in an amount sufficient, in the opinion of
         a nationally recognized firm of independent public accountants
         expressed in a written certification thereof delivered to the Trustee,
         to pay (A) the principal and interest on all Securities of such series
         and Coupons appertaining thereto on the date that such principal or
         interest is due and payable and (B) any mandatory sinking fund payments
         on the day on which such payments are due and payable in accordance
         with the terms of the Indenture and the Securities of such series;

                 (b) such deposit will not result in a breach or violation of,
         or constitute a default under, any agreement or instrument to which the
         Issuer is a party or by which it is bound;

                 (c) the Issuer has delivered to the Trustee an opinion of
         independent legal counsel satisfactory to the Trustee to the effect

<PAGE>   79

                                       71

         that Holders of the Securities of such series and Coupons appertaining
         thereto will not recognize income, gain or loss for Federal income tax
         purposes as a result of such deposit, defeasance and discharge and will
         be subject to Federal income tax on the same amount and in the same
         manner and at the same times, as would have been the case if such
         deposit, defeasance and discharge had not occurred; and

                 (d) the Issuer has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent provided for relating to the defeasance contemplated by this
         provision have been complied with, and the Opinion of Counsel shall
         also state that such deposit does not violate applicable law.

         SECTION 10.2 Application by Trustee of Funds Deposited for Payment of
Securities. Subject to Section 10.4, all moneys deposited with the Trustee
pursuant to Section 10.1 shall be held in trust and applied by it to the
payment, either directly or through any paying agent (including the Issuer
acting as its own paying agent), to the Holders of the particular Securities of
such series and of Coupons appertaining thereto for the payment or redemption of
which such moneys have been deposited with the Trustee, of all sums due and to
become due thereon for principal and interest; but such money need not be
segregated from other funds except to the extend required by law.

         SECTION 10.3 Repayment of Moneys Held by Paying Agent. In connection
with the satisfaction, and discharge of this Indenture with respect to
Securities of any series, all moneys then held by any paying agent under the
provisions of this Indenture with respect to such series of Securities shall,
upon demand of the Issuer, be repaid to it or paid to the Trustee and thereupon
such paying agent shall be released from all further liability with respect to
such moneys.

         SECTION 10.4 Return of Moneys Held by Trustee and Paying Agent
Unclaimed for Two Years. Any moneys deposited with or paid to the Trustee or any
paying agent for the payment of the principal of or interest on any Security of
any series and not applied but remaining unclaimed for two years after the date
upon which such principal or interest shall have become due and payable, shall,
upon the written request of the Issuer and unless otherwise required by
mandatory provisions of applicable escheat or abandoned or unclaimed property
law, be repaid to the Issuer by the Trustee for such series or such paying
agent, and the Holder of the Security of such series shall, unless

<PAGE>   80

                                       72

otherwise required by mandatory provisions of applicable escheat or abandoned or
unclaimed property laws, thereafter look only to the Issuer for any payment
which such Holder may be entitled to collect, and all liability of the Trustee
or any paying agent with respect to such moneys shall thereupon cease; provided,
the Trustee or such paying agent, before being required to make any such
repayment with respect to moneys deposited with it for any payment (a) in
respect of Registered Securities of any series, may at the expense of the
Issuer, mail by first class mail to Holders of such Securities at their
addresses as they shall appear on the Security register, and (b) in respect of
Unregistered Securities of any series, may at the expense of the Issuer cause to
be published once, in an Authorized Newspaper in London (and if required by
Section 3.6, once in an Authorized Newspaper in Luxembourg), notice, that such
moneys remain and that, after a date specified therein, which shall not be less
than thirty days from the date of such mailing or publication, any unclaimed
balance of such money then remaining will be repaid to the Issuer.

         SECTION 10.5 Indemnity for U.S. Government Obligations. The Issuer
shall pay and indemnify the Trustee against any tax, fee or other charge imposed
on or assessed against the U.S. Government Obligations deposited pursuant to
Section 10.1 or the principal or interest received in respect of such
obligations.

                                 ARTICLE ELEVEN

                            MISCELLANEOUS PROVISIONS

         SECTION 11.1 Incorporators, Shareholders, Officers and Directors of
Issuer Exempt from Individual Liability. No recourse under or upon any
obligation, covenant or agreement contained in this Indenture, or in any
Security or Coupon appertaining thereto, or because of any indebtedness
evidenced thereby, shall be had against any incorporator, as such or against any
past, present or future shareholder, officer or director, as such, of the Issuer
or of any successor, either directly or through the Issuer or any successor,
under any rule of law, statute or constitutional provision or by the enforcement
of any assessment or by any legal or equitable proceeding or otherwise, all such
liability being expressly waived and released by the acceptance of the
Securities and any Coupons appertaining thereto by the holders thereof and as
part of the consideration for the issue of the Securities and any Coupons
appertaining thereto.

<PAGE>   81

                                       73

         SECTION 11.2 Provisions of Indenture for the Sole Benefit of Parties
and Securityholders. Nothing in this Indenture or in the Securities and any
Coupons appertaining thereto, expressed or implied, shall give or be construed
to give to any person, firm or corporation, other than the parties hereto and
their successors and the Holders of the Securities or Coupons, any legal or
equitable right, remedy or claim under this Indenture or under any covenant or
provision herein contained, all such covenants and provisions being for the sole
benefit of the parties hereto and their successors and of the Holders of the
Securities.

         SECTION 11.3 Successors and Assigns of Issuer Bound by Indenture. All
the covenants, stipulations, promises and agreements in this Indenture contained
by or in behalf of the Issuer shall bind its successors and assigns, whether so
expressed or not.

         SECTION 11.4 Notices and Demands on Issuer, Trustee and
Securityholders. Any notice or demand which by any provision of this Indenture
is required or permitted to be given or served by the Trustee or by the Holders
of Securities or Coupons to or on the Issuer may be given or served by being
deposited postage prepaid, first-class mail (except as otherwise specifically
provided herein) addressed (until another address of the Issuer is filed by the
Issuer with the Trustee) to The Progressive Corporation, 6000 Parkland
Boulevard, Mayfield Heights, Ohio 44124, Attn: Treasurer. Any notice, direction,
request or demand by the Issuer or any Securityholder to or upon the Trustee
shall be deemed to have been sufficiently given or made, for all purposes, if
given or made at the Corporate Trust Office.

         Where this Indenture provides for notice to Holders. such notice shall
be sufficiently given (unless otherwise herein expressly provided) (i) in the
case of Holders of Registered Securities and Holders of Unregistered Securities
who have filed their names and addresses with the Trustee pursuant to Section
4.4(c)(ii), if in writing and mailed, first-class postage prepaid, to each
holder entitled thereto, at his last address as it appears in the registry books
or as so filed; and (ii) in the case of holders of Unregistered Securities who
have not filed their names and addresses with the Trustee, by publication in
accordance with the requirements of the provision hereof requiring such notice.
Any notice which is mailed in the manner herein provided shall be conclusively
presumed to have been duly given when mailed, whether or not the Holder receives
the notice. In any case

<PAGE>   82

                                       74

where notice to Holders is given by mail, neither the failure to mail such
notice, nor any defect in any notice so mailed, to any particular holder shall
affect the sufficiency of such notice with respect to other Holders. Where this
Indenture provides for notice in any manner, such notice may be waived in
writing by the person entitled to receive such notice, either before or after
the event, and such waiver shall be the equivalent of such notice. Waivers of
notice by Holders shall be filed with the Trustee, but such filing shall not be
a condition precedent to the validity of any action taken in reliance upon such
waiver.

         In case, by reason of the suspension of or irregularities in regular
mail service, it shall be impracticable to mail notice to the Issuer and
Securityholders when such notice is required to be given pursuant to any
provision of this Indenture, then any manner of giving such notice as shall be
satisfactory to the Trustee shall be deemed to be a sufficient giving of such
notice.

         SECTION 11.5 Officers' Certificates and Opinions of Counsel; Statements
to Be Contained Therein. Upon any application or demand by the Issuer to the
Trustee to take any action under any of the provisions of this Indenture, the
Issuer shall furnish to the Trustee an Officers' Certificate stating that all
conditions precedent provided for in this Indenture relating to the proposed
action have been complied with and an Opinion of Counsel stating that in the
opinion of such counsel all such conditions precedent have been complied with,
except that in the case of any such application or demand as to which the
furnishing of such documents is specifically required by any provision of this
Indenture relating to such particular application or demand, no additional
certificate or opinion need be furnished.

         Each certificate or opinion provided for in this Indenture and
delivered to the Trustee with respect to compliance with a condition or covenant
provided for in this Indenture shall include (a) a statement that the person
making such certificate or opinion has read such covenant or condition, (b) a
brief statement as to the nature and scope of the examination or investigation
upon which the statements or opinions contained in such certificate or opinion
are based, (c) a statement that, in the opinion of such person, he has made such
examination or investigation as is necessary to enable him to express an
informed opinion as to whether or not such covenant or condition has been
complied with and (d) a statement as to whether or not, in the opinion of such
person, such condition or covenant has been complied with.

<PAGE>   83

                                       75

         Any certificate, statement or opinion of an officer of the Issuer may
be based, insofar as it relates to legal matters, upon a certificate or opinion
of or representations by counsel, unless such officer knows that the certificate
or opinion or representations with respect to the matters upon which his
certificate, statement or opinion may be based as aforesaid are erroneous, or in
the exercise of reasonable care should know that the same are erroneous. Any
certificate, statement or opinion of counsel may be based, insofar as it relates
to factual matters, information with respect to which is in the possession of
the Issuer, upon the certificate, statement or opinion of or representations by
an officer or officers of the Issuer, unless such counsel knows that the
certificate, statement or opinion or representations with respect to the matters
upon which his certificate, statement or opinion may be based as aforesaid are
erroneous, or in the exercise of reasonable care should know that the same are
erroneous.

         Any certificate, statement or opinion of an officer of the Issuer or of
counsel may be based, insofar as it relates to accounting matters, upon a
certificate or opinion of or representations by an accountant or firm of
accountants in the employ of the Issuer, unless such officer or counsel, as the
case may be, knows that the certificate or opinion or representations with
respect to the accounting matters upon which his certificate, statement or
opinion may be based as aforesaid are erroneous, or in the exercise of
reasonable care should know that the same are erroneous.

         Any certificate or opinion of any independent firm of public
accountants filed with the Trustee shall contain a statement that such firm is
independent.

         SECTION 11.6 Payments Due on Saturdays, Sundays and Holidays. If the
date of maturity of interest on or principal of the Securities of any series or
any Coupons appertaining thereto or the date fixed for redemption or repayment
of any such Security or Coupon shall not be a Business Day, then payment of
interest or principal need not be made on such date, but may be made on the next
succeeding Business Day with the same force and effect as if made on the date of
maturity or the date fixed for redemption, and no interest shall accrue for the
period after such date.

         SECTION 11.7 Conflict of Any Provision of Indenture with Trust
Indenture Act of 1939. If and to the extent that any provision of this Indenture
limits, qualifies or conflicts with another provision included in

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                                       76

this Indenture which is required to be included herein by any of Sections 310 to
317, inclusive, of the Trust Indenture Act of 1939, such required provision
shall control.

         SECTION 11.8 New York Law to Govern. This Indenture and each Security
and Coupon shall be deemed to be a contract under the laws of the State of New
York, and for all purposes shall be construed in accordance with the laws of
such State, except as may otherwise be required by mandatory provisions of law.

         SECTION 11.9 Counterparts. This Indenture may be executed in any number
of counterparts, each of which shall be an original; but such counterparts shall
together constitute but one and the same instrument.

         SECTION 11.10 Effect of Headings. The Article and Section headings
herein and the Table of Contents are for convenience only and shall not affect
the construction hereof.

         SECTION 11.11 Securities in Foreign Currencies or in ECU. Whenever this
Indenture provides for any action by, or the determination of any of the rights
of, or any distribution to, Holders of Securities denominated in United States
dollars and in any other currency or currency unit (including ECU), in the
absence of any provision to the contrary in the form of Security of any
particular series, any amount in respect of any Security denominated in a
currency or currency unit (including ECU) other than United States dollars shall
be treated for any such action or distribution as that amount of United States
dollars that could be obtained for such amount on such reasonable basis of
exchange and as of such date as the Issuer may specify in a written notice to
the Trustee or in the absence of such written notice, as the Trustee shall so
determine.

                                 ARTICLE TWELVE

                   REDEMPTION or SECURITIES AND SINKING FUNDS

         SECTION 12.1 Applicability of Article. The provisions of this Article
shall be applicable to the Securities of any series which are redeemable before
their maturity or to any sinking fund for the retirement of Securities of a
series except as otherwise specified as contemplated by Section 2.3 for
Securities of such series.

<PAGE>   85

                                       77

         SECTION 12.2 Notice of Redemption; Partial Redemptions. Notice of
redemption to the Holders of Registered Securities of any series to be redeemed
as a whole or in part at the option of the Issuer shall be given by mailing
notice of such redemption by first class mail, postage prepaid, at least 30 days
and not more than 60 days prior to the date fixed for redemption to such Holders
of Securities of such series at their last addresses as they shall appear upon
the registry books. Notice of redemption to the Holders of Unregistered
Securities to be redeemed as a whole or in part, who have filed their names and
addresses with the Trustee pursuant to Section 4.4(c)(ii), shall be given by
mailing notice of such redemption, by first class mail, postage prepaid, at
least thirty and not more than sixty days prior to the date fixed for
redemption, to such Holders at such addresses as were so furnished to the
Trustee (and, in the case of any such notice given by the Issuer, the Trustee
shall make such information available to the Issuer for such purpose). Notice of
redemption to all other holders of Unregistered Securities shall be published in
an Authorized Newspaper in London (and, if required by Section 3.6, in an
Authorized Newspaper in Luxembourg), in each case, once in each of two
successive calendar weeks, the first publication to be not less than thirty nor
more than sixty days prior to the date fixed for redemption. Any notice which is
mailed in the manner herein provided shall be conclusively presumed to have been
duly given, whether or not the Holder receives the notice. Failure to give
notice by mail, or any defect in the notice to the Holder of any Security of a
series designated for redemption as a whole or in part shall not affect the
validity of the proceedings for the redemption of any other Security of such
series.

         The notice of redemption to each such Holder shall specify the
principal amount of each Security of such series held by such Holder to be
redeemed, the date fixed for redemption, the redemption price, the place or
places of payment, that payment will be made upon presentation and surrender of
such Securities, and, in the case of Securities with Coupons attached thereto,
of all Coupons appertaining thereto maturing after the date fixed for
redemption, that such redemption is pursuant to the mandatory or optional
sinking fund, or both, if such be the case, that interest accrued to the date
fixed for redemption will be paid as specified in such notice and that on and
after said date interest thereon or on the portions thereof to be redeemed will
cease to accrue. In case any Security of a series is to be redeemed in part only
the notice of redemption shall state the portion of the principal amount thereof
to be redeemed and shall state that on and after the date fixed for redemption,
upon surrender of

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                                       78

such Security, a new Security or Securities of such series in principal amount
equal to the unredeemed portion thereof will be issued.

         The notice of redemption of Securities of any series to be redeemed at
the option of the Issuer shall be given by the Issuer or, at the Issuer's
request, by the Trustee in the name and at the expense of the Issuer.

         On the redemption date specified in the notice of redemption given as
provided in this Section, the Issuer will deposit with the Trustee or with one
or more paying agents (or, if the Issuer is acting as its own paying agent, set
aside, segregate and hold in trust as provided in Section 3.4) an amount of
money sufficient to redeem on the redemption date all the Securities of such
series so called for redemption at the appropriate redemption price, together
with accrued interest to the date fixed for redemption. If any or all of the
outstanding Securities of a series are to be redeemed, the Issuer will deliver
to the Trustee at least 70 days prior to the date fixed for redemption an
Officers' Certificate stating the date of redemption and the aggregate principal
amount of Securities to be redeemed.

         If less than all the Securities of a series are to be redeemed, the
Trustee shall select, in such manner as it shall deem appropriate and fair,
Securities of such series to be redeemed in whole or in part. Securities may be
redeemed in part in multiples equal to the minimum authorized denomination for
Securities of such series or any integral multiple thereof. The Trustee shall
promptly notify the Issuer in writing of the Securities of such series selected
for redemption and, in the case of any Securities of such series selected for
partial redemption, the principal amount thereof to be redeemed. For all
purposes of this Indenture, unless the context otherwise requires, all
provisions relating to the redemption of Securities of any series shall relate,
in the case of any Security redeemed or to be redeemed only in part, to the
portion of the principal amount of such Security which has been or is to be
redeemed.

         SECTION 12.3 Payment of Securities Called for Redemption. If notice of
redemption has been given as above provided, the Securities or portions of
Securities specified in such notice shall become due and payable on the date and
at the place stated in such notice at the applicable redemption price, together
with interest accrued to the date fixed for redemption, and on and after said
date (unless the Issuer shall default in the payment of such Securities at the
redemption price, together with interest accrued to said date) interest on the
Securities or portions of Securities so called for redemption shall cease to
accrue and the

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                                       79

unmatured Coupons, if any, appertaining thereto shall be void and, except as
provided in Sections 6.5 and 10.4, such Securities shall cease from and after
the date fixed for redemption to be entitled to any benefit or security under
this Indenture, and the Holders thereof shall have no right in respect of such
Securities except the right to receive the redemption price thereof and unpaid
interest to the date fixed for redemption. On presentation and surrender of such
Securities, together with all Coupons appertaining thereto maturing after the
date fixed for redemption, at a place of payment specified in said notice, said
Securities and Coupons or the specified portions thereof shall be paid and
redeemed by the Issuer at the applicable redemption price, together with
interest accrued thereon to the date fixed for redemption; provided that any
semiannual payment of interest becoming due on the date fixed for redemption
shall be payable in the case of Securities with Coupons attached thereto, to the
bearers of the Coupons for such interest upon surrender thereof, and in the case
of Registered Securities, to the Holders of such Securities registered as such
on the relevant record date subject to the terms and provisions of Section 2.4
hereof.

         If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal shall, until paid or duly
provided for, bear interest from the date fixed for redemption at the rate of
interest or Yield to Maturity (in the case of an Original Issue Discount
Security) borne by the Security.

         If any Security with Coupons attached thereto is surrendered for
redemption and is not accompanied by all such Coupons maturing after the date
fixed for redemption, the surrender of such missing Coupon or Coupons may be
waived by the Issuer and the Trustee, if there be furnished to each of them such
security or indemnity as they may require to save each of them harmless.

         Upon presentation of any Security redeemed in part only, the Issuer
shall execute and the Trustee shall authenticate and deliver to or on the order
of the Holder thereof, at the expense of the Issuer, a new Security or
Securities of such series, together with all Coupons, if any, appertaining
thereto, of authorized denominations, in principal amount equal to the
unredeemed portion of the Security so presented.

         SECTION 12.4 Exclusion of Certain Securities from Eligibility for
Selection for Redemption. Securities shall be excluded from eligibility for
selection for redemption if they are identified by registra-

<PAGE>   88

                                       80

tion and certificate number in a written statement signed by an authorized
officer of the Issuer and delivered to the Trustee at least 40 days prior to the
last date on which notice of redemption may be given as being owned of record
and beneficially by, and not pledged or hypothecated by either (a) the Issuer or
(b) an entity specifically identified in such written statement directly or
indirectly controlling or controlled by or under direct or indirect common
control with the Issuer.

         SECTION 12.5 Mandatory and Optional Sinking Funds. The minimum amount
of any sinking fund payment provided for by the terms of Securities of any
series is herein referred to as a "mandatory sinking fund payment", and any
payment in excess of such minimum amount provided for by the terms of Securities
of any series is herein referred to as an "optional sinking fund payment". The
date on which a sinking fund payment is to be made is herein referred to as the
"sinking fund payment date".

         In lieu of making all or any part of any mandatory sinking fund payment
with respect to any series of Securities in cash, the Issuer may at its option
(a) deliver to the Trustee Securities of such series theretofore purchased or
otherwise acquired (except upon redemption pursuant to the mandatory sinking
fund) by the Issuer or receive credit for Securities of such series (not
previously so credited) theretofore purchased or otherwise acquired (except as
aforesaid) by the Issuer and delivered to the Trustee for cancellation pursuant
to Section 2.7, (b) receive credit for optional sinking fund payments (not
previously so credited) made pursuant to this Section, or (c) receive credit for
Securities of such series (not previously so credited) redeemed by the Issuer
through any optional redemption provision contained in the terms of such series.
Securities so delivered or credited shall be received or credited by the Trustee
at the sinking fund redemption price specified in such, Securities.

         On or before the sixtieth day next preceding each sinking fund payment
date for any series, the Issuer will deliver to the Trustee a written statement
(which need not contain the statements required by Section 11.5) signed by an
authorized officer of the Issuer (a) specifying the portion of the mandatory
sinking fund payment to be satisfied by payment of cash and the portion to be
satisfied by credit of Securities of such series, (b) stating that none of the
Securities of such series has theretofore been so credited, (c) stating that no
defaults in the payment of interest or Events of Default with respect to such
series have occurred

<PAGE>   89

                                       81

(which have not been waived or cured) and are continuing and (d) stating whether
or not the Issuer intends to exercise its right to make an optional sinking fund
payment with respect to such series and, if so, specifying the amount of such
optional sinking fund payment which the Issuer intends to pay on or before the
next succeeding sinking fund payment date. Any Securities of such series to be
credited and required to be delivered to the Trustee in order for the Issuer to
be entitled to credit therefore as aforesaid which have not theretofore been
delivered to the Trustee shall be delivered for cancellation pursuant to Section
2.10 to the Trustee with such written statement (or reasonably promptly
thereafter if acceptable to the Trustee). Such written statement shall be
irrevocable and upon its receipt by the Trustee the Issuer shall become
unconditionally obligated to make all the cash payments or payments therein
referred to, if any, on or before the next succeeding sinking fund payment date.
Failure of the Issuer, on or before any such sixtieth day, to deliver such
written statement and Securities specified in this paragraph, if any, shall not
constitute a default but shall constitute, on and as of such date, the
irrevocable election of the Issuer (i) that the mandatory sinking fund payment
for such series due on the next succeeding sinking fund payment date shall be
paid entirely in cash without the option to deliver or credit Securities of such
series in respect thereof and (ii) that the Issuer will make no optional sinking
fund payment with respect to such series as provided in this Section.

         If the sinking fund payment or payments (mandatory or optional or both)
to be made in cash on the next succeeding sinking fund payment date plus any
unused balance of any preceding sinking fund payments made in cash shall exceed
$50,000 (or a lesser sum if the Issuer shall so request) with respect to the
Securities of any particular series, such cash shall be applied on the next
succeeding sinking fund payment date to the redemption of Securities of such
series at the sinking fund redemption price together with accrued interest to
the date fixed for redemption. If such amount shall be $50,000 or less and the
Issuer makes no such request then it shall be carried over until a sum in excess
of $50,000 is available. The Trustee shall select, in the manner provided in
Section 12.2, for redemption on such sinking fund payment date a sufficient
principal amount of Securities of such series to absorb said cash, as nearly as
may be, and shall (if requested in writing by the Issuer) inform the Issuer of
the serial numbers of the Securities of such series (or portions thereof) so
selected. Securities of any series which are (a) owned by the Issuer

<PAGE>   90

                                       82

or an entity known by the Trustee to be directly or indirectly controlling or
controlled by or under direct or indirect common control with the Issuer, as
shown by the Security register, and not know to the Trustee to have been pledged
or hypothecated by the Issuer or any such entity or (b) identified in an
Officers' Certificate at least 60 days prior to the sinking fund payment date as
being beneficially owned by, and not pledged or hypothecated by, the Issuer or
an entity directly or indirectly controlling or controlled by or under direct or
indirect common control with the Issuer shall be excluded from Securities of
such series eligible for selection for redemption. The Trustee, in the name and
at the expense of the Issuer (or the Issuer, if it shall so request the Trustee
in writing) shall cause notice of redemption of the Securities of such series to
be given in substantially the manner provided in Section 12.2 (and with the
effect provided in Section 12.3) for the redemption of Securities of such series
in part at the option of the issuer. The amount of any sinking fund payments not
so applied or allocated to the redemption of Securities of such series shall be
added to the next cash sinking fund payment for such series and, together with
such payment, shall be applied in accordance with the provisions of this
Section. Any and all sinking fund moneys held on the stated maturity date of the
Securities of any particular series (or earlier, if such maturity is
accelerated), which are not held for the payment or redemption of particular
Securities of such series shall be applied, together with other moneys, if
necessary, sufficient for the purpose, to the payment of the principal of, and
interest on, the Securities of such series at maturity.

         On each sinking fund payment date, the Issuer shall pay to the Trustee
in cash or shall otherwise provide for the payment of all interest accrued to
the date fixed for redemption on Securities to be redeemed on such sinking fund
payment date.

         The Trustee shall not redeem or cause to be redeemed any Securities of
a series with sinking fund moneys or provide any notice of redemption of
Securities for such series by operation of the sinking fund during the
continuance of a default in payment of interest on such Securities or of any
Event of Default except that, where the mailing or publication of notice of
redemption of any Securities shall theretofore have been made, the Trustee shall
redeem or cause to be redeemed such Securities, provided that it shall have
received from the Issuer a sum sufficient for such redemption. Except as
aforesaid, any moneys in the sinking fund for such series at the time when any
such default or Event of Default

<PAGE>   91

                                       83

shall occur, and any moneys thereafter paid into the sinking fund, shall, during
the continuance of such default or Event of Default, be deemed to have been
collected under Article Five and held for the payment of all such Securities. In
case such Event of Default shall have been waived as provided in Section 5.10 or
the default cured on or before the sixtieth day preceding the sinking fund
payment date in any year, such moneys shall thereafter be applied on the next
succeeding sinking fund payment date in accordance with this Section to the
redemption of such Securities.

<PAGE>   92

                                       84

         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed, and their respective corporate seals to be hereunto affixed and
attested, all as of November 15, 1988.

                                                     THE PROGRESSIVE CORPORATION
[CORPORATE SEAL]

                                                     By

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

Attest:

By
   --------------------------------------------------------

                                                     THE FIRST NATIONAL BANK
                                                        OF BOSTON

[CORPORATE SEAL]

                                                     By

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

Attest:

By
   --------------------------------------------------------

<PAGE>   93

                                       85

STATE OF NEW YORK
COUNTY OF NEW YORK                                   SS.:

         On this _______ day of_______________, before me personally came HOWARD
M. ZELIKOW, to me personally known, who, being by me duly sworn, did depose and
say that he resides at Cleveland, Ohio
                        that he is an officer of THE PROGRESSIVE CORPORATION,
one of the corporations described in and which executed the above instrument;
that he knows the corporate seal of said corporation; that the seal affixed to
said instrument is such corporate seal; that it was so affixed by authority of
the Board of Directors of said corporation, and that he signed his name thereto
by like authority.

--------------------------------------------------------------
                                                        Notary Public
[NOTARIAL SEAL]

STATE OF NEW YORK
COUNTY OF NEW YORK                                   SS.:

       On this _____ day of_______________, before me personally came
                                        to me personally known, who, being by
me duly sworn,, did depose and say that he resides at New York, New York; that
he is an of THE FIRST NATIONAL BANK OF BOSTON, one of the corporations described
in and which executed the above instrument; that he knows the corporate seal of
said corporation; that the seal affixed to said instrument is such corporate
seal; that it was so affixed by authority of the Board of Directors of said
corporation, and that he signed his name thereto by like authority.

--------------------------------------------------------------
                                                        Notary Public

[NOTARIAL SEAL]

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