Exhibit 4(c)

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



                         MINNESOTA POWER & LIGHT COMPANY

                                       TO

                              THE BANK OF NEW YORK

                                                Trustee



                                   ---------


                                    Indenture
                   (For Unsecured Subordinated Debt Securities
                          relating to Trust Securities)


                            Dated as of March 1, 1996




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



                                        i


                                TABLE OF CONTENTS


PARTIES....................................................................  1

RECITAL OF THE COMPANY.....................................................  1

ARTICLE ONE................................................................  1

Definitions and Other Provisions of General Application....................  1
         SECTION 101.  Definitions.........................................  1
                  Act......................................................  2
                  Additional Interest......................................  2
                  Affiliate................................................  2
                  Authenticating Agent.....................................  2
                  Authorized Officer.......................................  2
                  Board of Directors.......................................  2
                  Board Resolution.........................................  2
                  Business Day.............................................  2
                  Commission...............................................  3
                  Company..................................................  3
                  Company Request or Company Order.........................  3
                  Corporate Trust Office...................................  3
                  corporation..............................................  3
                  Defaulted Interest.......................................  3
                  Dollar or $..............................................  3
                  Event of Default.........................................  3
                  Governmental Authority...................................  3
                  Government Obligations...................................  3
                  Guarantee................................................  4
                  Holder...................................................  4
                  Indenture................................................  4
                  Interest Payment Date....................................  4
                  Maturity.................................................  4
                  Officer's Certificate....................................  4
                  Opinion of Counsel.......................................  4
                  Outstanding..............................................  4
                  Paying Agent.............................................  5
                  Person...................................................  5
                  Place of Payment.........................................  5
                  Predecessor Security.....................................  5
                  Preferred Securities.....................................  6
                  Redemption Date..........................................  6
                  Redemption Price.........................................  6
                  Regular Record Date......................................  6
                  Responsible Officer......................................  6
                  Securities...............................................  6

Note:  This table of contents shall not, for any purpose, be deemed to 
       be part of the Indenture.


                                        ii

                  Security Register and Security Registrar.................  6
                  Senior Indebtedness......................................  6
                  Special Record Date......................................  6
                  Stated Maturity..........................................  6
                  Trust....................................................  7
                  Trust Agreement..........................................  7
                  Trust Indenture Act......................................  7
                  Trustee..................................................  7
                  United States............................................  7
         SECTION 102.  Compliance Certificates and Opinions................  7
         SECTION 103.  Form of Documents Delivered to Trustee..............  8
         SECTION 104.  Acts of Holders.....................................  9
         SECTION 105.  Notices, etc. to Trustee and Company................ 10
         SECTION 106.  Notice to Holders of Securities; Waiver............. 11
         SECTION 107.  Conflict with Trust Indenture Act................... 12
         SECTION 108.  Effect of Headings and Table of Contents............ 12
         SECTION 109.  Successors and Assigns.............................. 12
         SECTION 110.  Separability Clause................................. 12
         SECTION 111.  Benefits of Indenture............................... 12
         SECTION 112.  Governing Law....................................... 13
         SECTION 113.  Legal Holidays...................................... 13

ARTICLE TWO................................................................ 13

Security Forms............................................................. 13
         SECTION 201.  Forms Generally..................................... 13
         SECTION 202.  Form of Trustee's Certificate of Authentication..... 14

ARTICLE THREE.............................................................. 14

The Securities............................................................. 14
         SECTION 301.  Amount Unlimited; Issuable in Series................ 14
         SECTION 302.  Denominations....................................... 18
         SECTION 303.  Execution, Authentication, Delivery and Dating...... 18
         SECTION 304.  Temporary Securities................................ 19
         SECTION 305.  Registration, Registration of Transfer and Exchange. 20
         SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities.... 21
         SECTION 307.  Payment of Interest; Interest Rights Preserved...... 22
         SECTION 308.  Persons Deemed Owners............................... 23
         SECTION 309.  Cancellation by Security Registrar.................. 23
         SECTION 310.  Computation of Interest............................. 24
         SECTION 311.  Extension of Interest Payment....................... 24
         SECTION 312.  Additional Interest................................. 24

ARTICLE FOUR............................................................... 25

Redemption of Securities................................................... 25

Note:  This table of contents shall not, for any purpose, be deemed to 
       be part of the Indenture.


                                   iii

         SECTION 401.  Applicability of Article............................ 25
         SECTION 402.  Election to Redeem; Notice to Trustee............... 25
         SECTION 403.  Selection of Securities to Be Redeemed.............. 25
         SECTION 404.  Notice of Redemption................................ 26
         SECTION 405.  Securities Payable on Redemption Date............... 27
         SECTION 406.  Securities Redeemed in Part......................... 27

ARTICLE FIVE............................................................... 28

Sinking Funds.............................................................. 28
         SECTION 501.  Applicability of Article............................ 28
         SECTION 502.  Satisfaction of Sinking Fund Payments with 
                         Securities........................................ 28
         SECTION 503.  Redemption of Securities for Sinking Fund........... 28

ARTICLE SIX................................................................ 29

Covenants.................................................................. 29
         SECTION 601.  Payment of Principal, Premium and Interest.......... 29
         SECTION 602.  Maintenance of Office or Agency..................... 29
         SECTION 603.  Money for Securities Payments to Be Held in Trust... 30
         SECTION 604.  Corporate Existence................................. 31
         SECTION 605.  Maintenance of Properties........................... 31
         SECTION 606.  Annual Officer's Certificate as to Compliance....... 32
         SECTION 607.  Waiver of Certain Covenants......................... 32
         SECTION 608.  Restriction on Payment of Dividends................. 32
         SECTION 609.  Maintenance of Trust Existence...................... 33
         SECTION 610.  Rights of Holders of Preferred Securities........... 33

ARTICLE SEVEN.............................................................. 34

Satisfaction and Discharge................................................. 34
         SECTION 701.  Defeasance.......................................... 34
         SECTION 702.  Satisfaction and Discharge of Indenture............. 36
         SECTION 703.  Application of Trust Money.......................... 37

ARTICLE EIGHT.............................................................. 37

Events of Default; Remedies................................................ 37
         SECTION 801.  Events of Default................................... 37
         SECTION 802.  Acceleration of Maturity; Rescission and Annulment.. 39
         SECTION 803.  Collection of Indebtedness and Suits for 
                         Enforcement by Trustee............................ 40
         SECTION 804.  Trustee May File Proofs of Claim.................... 41
         SECTION 805.  Trustee May Enforce Claims Without Possession 
                         of Securities..................................... 41
         SECTION 806.  Application of Money Collected...................... 42
         SECTION 807.  Limitation on Suits................................. 42
         SECTION 808.  Unconditional Right of Holders to Receive Principal,
Premium and Interest....................................................... 43

Note: This table of contents shall not, for any purpose, be deemed to be
      part of the Indenture.


                                        iv

         SECTION 809.  Restoration of Rights and Remedies.................. 43
         SECTION 810.  Rights and Remedies Cumulative...................... 43
         SECTION 811.  Delay or Omission Not Waiver........................ 44
         SECTION 812.  Control by Holders of Securities.................... 44
         SECTION 813.  Waiver of Past Defaults............................. 44
         SECTION 814.  Undertaking for Costs............................... 45
         SECTION 815.  Waiver of Stay or Extension Laws.................... 45

ARTICLE NINE............................................................... 45

The Trustee................................................................ 45
         SECTION 901.  Certain Duties and Responsibilities................. 45
         SECTION 902.  Notice of Defaults.................................. 46
         SECTION 903.  Certain Rights of Trustee........................... 46
         SECTION 904.  Not Responsible for Recitals or Issuance 
                         of Securities..................................... 47
         SECTION 905.  May Hold Securities................................. 48
         SECTION 906.  Money Held in Trust................................. 48
         SECTION 907.  Compensation and Reimbursement...................... 48
         SECTION 908.  Disqualification; Conflicting Interests............. 49
         SECTION 909.  Corporate Trustee Required; Eligibility............. 49
         SECTION 910.  Resignation and Removal; Appointment of Successor... 50
         SECTION 911.  Acceptance of Appointment by Successor.............. 52
         SECTION 912.  Merger, Conversion, Consolidation or Succession 
                         to Business....................................... 53
         SECTION 913.  Preferential Collection of Claims Against Company... 53
         SECTION 914.  Co-trustees and Separate Trustees................... 54
         SECTION 915.  Appointment of Authenticating Agent................. 55

ARTICLE TEN................................................................ 57

Holders' Lists and Reports by Trustee and Company.......................... 57
         SECTION 1001.  Lists of Holders................................... 57
         SECTION 1002.  Reports by Trustee and Company..................... 57

ARTICLE ELEVEN............................................................. 57

Consolidation, Merger, Conveyance or Other Transfer ....................... 57
         SECTION 1101.  Company May Consolidate, etc., Only on 
                         Certain Terms..................................... 57
         SECTION 1102.  Successor Corporation Substituted.................. 58

ARTICLE TWELVE............................................................. 58

Supplemental Indentures.................................................... 58
         SECTION 1201.  Supplemental Indentures Without Consent of Holders. 58
         SECTION 1202.  Supplemental Indentures With Consent of Holders.... 60
         SECTION 1203.  Execution of Supplemental Indentures............... 62
         SECTION 1204.  Effect of Supplemental Indentures.................. 62
         SECTION 1205.  Conformity With Trust Indenture Act................ 62

Note: This table of contents shall not, for any purpose, be deemed to be
      part of the Indenture.


                                        v

         SECTION 1206.  Reference in Securities to Supplemental Indentures. 62
         SECTION 1207.  Modification Without Supplemental Indenture........ 63

ARTICLE THIRTEEN........................................................... 63

Meetings of Holders; Action Without Meeting................................ 63
         SECTION 1301.  Purposes for Which Meetings May Be Called.......... 63
         SECTION 1302.  Call, Notice and Place of Meetings................. 63
         SECTION 1303.  Persons Entitled to Vote at Meetings............... 64
         SECTION 1304.  Quorum; Action..................................... 64
         SECTION 1305.  Attendance at Meetings; Determination of 
                         Voting Rights; Conduct and Adjournment of 
                         Meetings.......................................... 65
         SECTION 1306.  Counting Votes and Recording Action of Meetings.... 66
         SECTION 1307.  Action Without Meeting............................. 66

ARTICLE FOURTEEN........................................................... 67

Immunity of Incorporators, Stockholders, Officers and Directors............ 67
         SECTION 1401.  Liability Solely Corporate......................... 67

ARTICLE FIFTEEN............................................................ 67

Subordination of Securities................................................ 67
         SECTION 1501.  Securities Subordinate to Senior Indebtedness...... 67
         SECTION 1502.  Payment Over of Proceeds of Securities............. 68
         SECTION 1503.  Disputes with Holders of Certain Senior 
                         Indebtedness...................................... 70
         SECTION 1504.  Subrogation........................................ 70
         SECTION 1505.  Obligation of the Company Unconditional............ 70
         SECTION 1506.  Priority of Senior Indebtedness Upon Maturity...... 71
         SECTION 1507.  Trustee as Holder of Senior Indebtedness........... 71
         SECTION 1508.  Notice to Trustee to Effectuate Subordination...... 71
         SECTION 1509.  Modification, Extension, etc. of Senior 
                         Indebtedness...................................... 72
         SECTION 1510.  Trustee Has No Fiduciary Duty to Holders of 
                         Senior Indebtedness............................... 72
         SECTION 1511.  Paying Agents Other Than the Trustee............... 72
         SECTION 1512.  Rights of Holders of Senior Indebtedness 
                         Not Impaired...................................... 72
         SECTION 1513.  Effect of Subordination Provisions; Termination.... 73

Testimonium................................................................ 74

Signatures and Seals....................................................... 74

Acknowledgements........................................................... 76

Note: This table of contents shall not, for any purpose, be deemed to be
      part of the Indenture.


                       MINNESOTA POWER & LIGHT COMPANY

            Reconciliation and tie between Trust Indenture Act of 1939
                   and Indenture, dated as of March 1, 1996


Trust Indenture Act Section                                Indenture Section

Section 310  
         (a)(1)..................................................909
         (a)(2)..................................................909
         (a)(3)..................................................914
         (a)(4)................................................Not Applicable
         (b).....................................................908
                                                                 910
Section 311
         (a).....................................................913
         (b).....................................................913
         (c).....................................................913
Section 312
         (a)....................................................1001
         (b)....................................................1001
         (c)....................................................1001
Section 313
         (a)....................................................1002
         (b)....................................................1002
         (c)....................................................1002
Section 314 
         (a)....................................................1002
         (a)(4)..................................................606
         (b)...................................................Not Applicable
         (c)(1)..................................................102
         (c)(2)..................................................102
         (c)(3)................................................Not Applicable
         (d)...................................................Not Applicable
         (e).....................................................102
Section 315
         (a).....................................................901
                                                                 903
         (b).....................................................902
         (c).....................................................901
         (d).....................................................901
         (e).....................................................814
Section 316
         (a).....................................................812
                                                                 813
         (a)(1)(A)...............................................802
                                                                 812
         (a)(1)(B)...............................................813
         (a)(2)................................................Not Applicable
         (b).....................................................808
Section 317
         (a)(1)..................................................803
         (a)(2)..................................................804
         (b).....................................................603
Section 318
         (a).....................................................107




                  INDENTURE,  dated as of March 1, 1996, between MINNESOTA POWER
& LIGHT COMPANY, a corporation duly organized and existing under the laws of the
State of Minnesota (herein called the "Company"), having its principal office at
30 West Superior  Street,  Duluth,  Minnesota 55802, and THE BANK OF NEW YORK, a
corporation  of the State of New York,  having  its  principal  corporate  trust
office at 101  Barclay  Street,  New York,  New York 10286,  as Trustee  (herein
called the "Trustee").

                       RECITAL OF THE COMPANY

                  The  Company has duly authorized the execution and delivery of
this  Indenture to provide for the issuance  from time to time of its  unsecured
subordinated debentures, notes or other evidences of indebtedness (herein called
the "Securities"),  in an unlimited  aggregate  principal amount to be issued in
one or more series as contemplated  herein;  and all acts necessary to make this
Indenture a valid agreement of the Company have been performed.

                  For  all  purposes  of this  Indenture,  except  as  otherwise
expressly provided or unless the context otherwise  requires,  capitalized terms
used  herein  shall have the  meanings  assigned  to them in Article One of this
Indenture.

                  NOW, THEREFORE, THIS INDENTURE WITNESSETH:

                  For and in  consideration  of the premises and the purchase of
the Securities by the Holders thereof, it is mutually covenanted and agreed, for
the equal and  proportionate  benefit of all Holders of the Securities or of any
series thereof, as follows:


                                ARTICLE ONE

           Definitions and Other Provisions of General Application

SECTION 101.  Definitions.
                
               For all purposes of this Indenture, except as otherwise expressly
provided or unless the context otherwise requires:

               (a) the terms defined in this Article have the meanings  assigned
      to them in this Article and include the plural as well as the singular;
      
               (b) all terms used herein without definition which are defined in
      the Trust Indenture Act, either directly or by reference therein, have the
      meanings assigned to them therein;

               (c) all  accounting  terms not otherwise  defined herein have the
      meanings assigned to them in accordance with generally accepted accounting
      principles in the United States, and, except as otherwise herein expressly
      provided, the term "generally accepted accounting principles" with respect
      to any  computation  required  or  permitted  hereunder  shall  mean  such
      accounting  principles as are  generally  accepted in the United States at
      the date of such 


                                       -2-

      computation or, at the election of the Company from time to time,  at the
      date of the  execution  and  delivery of this  Indenture; provided,  
      however,  that in  determining  generally  accepted  accounting principles
      applicable to the Company,  the Company  shall,  to the extent required,  
      conform to any order, rule or regulation of any  administrative agency,   
      regulatory   authority   or  other   governmental   body  having
      jurisdiction over the Company; and

               (d) 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.

               Certain terms,  used  principally in Article Nine, are defined in
that Article.

               "Act",  when used with  respect to any Holder of a Security,  has
the meaning specified in Section 104.

               "Additional Interest" has the meaning specified in Section 312.

               "Affiliate"  of any  specified  Person  means  any  other  Person
directly or indirectly  controlling or controlled by or under direct or indirect
common control with such specified Person.  For the purposes of this definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and policies of such Person,  directly or through one or
more  intermediaries,  whether  through the ownership of voting  securities,  by
contract  or  otherwise;  and the  terms  "controlling"  and  "controlled"  have
meanings correlative to the foregoing.

               "Authenticating  Agent" means any Person  (other than the Company
or an Affiliate of the Company)  authorized  by the Trustee  pursuant to Section
915 to act on  behalf  of the  Trustee  to  authenticate  one or more  series of
Securities.

               "Authorized  Officer"  means  the  Chairman  of  the  Board,  the
President,  any Vice President,  the Treasurer,  any Assistant Treasurer, or any
other officer or agent of the Company duly  authorized by the Board of Directors
to act in respect of matters relating to this Indenture.

               "Board of  Directors"  means either the board of directors of the
Company or any  committee  thereof duly  authorized to act in respect of matters
relating to this Indenture.

               "Board Resolution" means a copy of a resolution  certified by the
Secretary or an Assistant  Secretary of the Company to have been duly adopted by
the Board of  Directors  and to be in full  force and effect on the date of such
certification, and delivered to the Trustee.

               "Business  Day",  when used with respect to a Place of Payment or
any other  particular  location  specified in the Securities or this  Indenture,
means any day,  other  than a Saturday  or  Sunday,  which is not a day on which
banking  institutions  or trust  companies  in such  Place of  Payment  or other
location are generally  authorized  or required by law,  regulation or


                                       -3-

executive order to remain closed,  except as may be otherwise specified as 
contemplated by Section 301.

               "Commission"  means the  Securities and Exchange  Commission,  as
from time to time  constituted,  created  under the  Securities  Exchange Act of
1934, as amended, or, if at any time after the date of 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, if any,  performing
such duties at such time.

               "Company"  means the Person  named as the  "Company" in the first
paragraph  of this  Indenture  until a successor  Person  shall have become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Company" shall mean such successor Person.

               "Company  Request" or "Company  Order" means a written request or
order signed in the name of the Company by an  Authorized  Officer and delivered
to the Trustee.

               "Corporate Trust Office" means the office of the Trustee at which
at any  particular  time its  corporate  trust  business  shall  be  principally
administered,  which  office  at the  date of  execution  and  delivery  of this
Indenture is located at 101 Barclay Street, New York, New York 10286.

               "corporation" means a corporation,  association,  company,  joint
stock company or business trust.

               "Defaulted Interest" has the meaning specified in Section 307.

               "Dollar" or "$" means a dollar or other  equivalent  unit in such
coin or currency of the United  States as at the time shall be legal  tender for
the payment of public and private debts.

               "Event of Default" has the meaning specified in Section 801.

               "Governmental  Authority"  means  the  government  of the  United
States or of any State or Territory thereof or of the District of Columbia or of
any county, municipality or other political subdivision of any of the foregoing,
or any  department,  agency,  authority or other  instrumentality  of any of the
foregoing.

               "Government Obligations" means:

                       (a) direct  obligations  of, or obligations the principal
               of and interest on which are  unconditionally  guaranteed by, the
               United  States and  entitled to the benefit of the full faith and
               credit thereof; and

                       (b)   certificates,    depositary   receipts   or   other
               instruments  which  evidence  a  direct  ownership   interest  in
               obligations  described  in clause  (a)  above or in any  specific
               interest or principal payments due in respect thereof;  provided,
               however,  that the  


                                       -4-

               custodian of such  obligations or specific  interest or principal
               payments  shall be a bank or trust company (which may include the
               Trustee  or  any  Paying  Agent)  subject  to  Federal  or  state
               supervision or examination with a combined capital and surplus of
               at least $50,000,000;  and provided,  further, that except as may
               be otherwise  required by law, such custodian  shall be obligated
               to pay to the holders of such certificates,  depositary  receipts
               or other  instruments  the full amount received by such custodian
               in respect of such obligations or specific payments and shall not
               be permitted to make any deduction therefrom.

               "Guarantee"  means the  guarantee  agreement  delivered  from the
Company to a Trust,  for the  benefit of the  holders  of  Preferred  Securities
issued by such Trust.

               "Holder" means a Person in whose name a Security is registered in
the Security Register.

               "Indenture"  means this  instrument  as  originally  executed and
delivered and as it may from time to time be  supplemented  or amended by one or
more  indentures  supplemental  hereto  entered into pursuant to the  applicable
provisions  hereof  and  shall  include  the  terms of a  particular  series  of
Securities established as contemplated by Section 301.

               "Interest  Payment Date", when used with respect to any Security,
means the Stated Maturity of an installment of interest on such Security.

               "Maturity",  when used with  respect to any  Security,  means the
date on which the  principal  of such  Security or an  installment  of principal
becomes  due and payable as  provided  in such  Security  or in this  Indenture,
whether at the Stated Maturity,  by declaration of  acceleration,  upon call for
redemption or otherwise.

               "Officer's   Certificate"   means  a  certificate  signed  by  an
Authorized Officer and delivered to the Trustee.

               "Opinion of Counsel" means a written opinion of counsel,  who may
be counsel for the Company, or other counsel acceptable to the Trustee.

               "Outstanding", when used with respect to Securities, means, as of
the  date  of  determination,   all  Securities  theretofore  authenticated  and
delivered under this Indenture, except:

                       (a)  Securities  theretofore  canceled by the Trustee or 
               delivered to the Trustee for cancellation;

                       (b)  Securities deemed to have been paid in accordance 
               with Section 701; and

                       (c)  Securities  which have been paid pursuant to Section
               306 or in exchange for or in lieu of which other  Securities have
               been  authenticated  and  delivered  pursuant


                                       -5-

               to this  Indenture, other than any such  Securities  in respect 
               of which  there shall have been presented to the Trustee proof  
               satisfactory  to it and the  Company  that  such  Securities  
               are  held  by a  bona  fide purchaser or purchasers in whose 
               hands such  Securities are valid obligations of the Company;

provided,  however,  that  in  determining  whether  or not the  Holders  of the
requisite  principal amount of the Securities  Outstanding under this Indenture,
or the  Outstanding  Securities of any series,  have given any request,  demand,
authorization,  direction, notice, consent or waiver hereunder or whether or not
a quorum is present at a meeting of Holders of Securities,  Securities  owned by
the Company or any other  obligor upon the  Securities  or any  Affiliate of the
Company or of such other  obligor  (unless the Company,  such  Affiliate or such
obligor owns all Securities Outstanding under this Indenture, or all Outstanding
Securities of each such series, as the case may be, determined without regard to
this provision)  shall be disregarded  and deemed not to be Outstanding,  except
that, in determining  whether the Trustee shall be protected in relying upon any
such request,  demand,  authorization,  direction,  notice, consent or waiver or
upon any such  determination  as to the  presence of a quorum,  only  Securities
which  the  Trustee  knows to be so owned  shall  be so  disregarded;  provided,
however,  that  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 Company or any other  obligor upon the  Securities or any
Affiliate of the Company or of such other obligor; and provided,  further, that,
in the case of any Security the  principal of which is payable from time to time
without  presentment  or surrender,  the principal  amount of such Security that
shall be deemed to be Outstanding at any time for all purposes of this Indenture
shall be the original  principal  amount  thereof less the  aggregate  amount of
principal thereof theretofore paid.

               "Paying   Agent"  means  any  Person,   including   the  Company,
authorized  by the  Company to pay the  principal  of, and  premium,  if any, or
interest, if any, on any Securities on behalf of the Company.

               "Person" means any individual,  corporation,  partnership,  joint
venture, trust or unincorporated organization or any Governmental Authority.

               "Place of Payment",  when used with respect to the  Securities of
any series, means the place or places, specified as contemplated by Section 301,
at which,  subject  to  Section  602,  principal  of and  premium,  if any,  and
interest, if any, on the Securities of such series are payable.

               "Predecessor  Security" of any  particular  Security  means every
previous Security evidencing all or a portion of the same debt as that evidenced
by such  particular  Security;  and,  for the purposes of this  definition,  any
Security  authenticated  and  delivered  under Section 306 in exchange for or in
lieu of a mutilated,  destroyed, lost or stolen Security shall be deemed (to the
extent  lawful) to evidence the same debt as the mutilated,  destroyed,  lost or
stolen Security.


                                       -6-

               "Preferred Securities" means any preferred trust interests issued
by a Trust or similar securities issued by permitted successors to such Trust in
accordance with the Trust Agreement pertaining to such Trust.

               "Redemption  Date",  when used with respect to any Security to be
redeemed,  means  the date  fixed for such  redemption  by or  pursuant  to this
Indenture.

               "Redemption  Price", when used with respect to any Security to be
redeemed,  means  the  price  at  which it is to be  redeemed  pursuant  to this
Indenture.

               "Regular  Record Date" for the  interest  payable on any Interest
Payment Date on the  Securities of any series means the date  specified for that
purpose as contemplated by Section 301.

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

               "Securities"  has the meaning stated in the first recital of this
Indenture and more particularly means any securities authenticated and delivered
under this Indenture.

               "Security Register" and "Security  Registrar" have the respective
meanings specified in Section 305.

               "Senior   Indebtedness"   means  all   obligations   (other  than
non-recourse  obligations and the indebtedness  issued under this Indenture) of,
or  guaranteed  or assumed by, the Company for borrowed  money,  including  both
senior  and  subordinated  indebtedness  for  borrowed  money  (other  than  the
Securities),  or for the  payment  of  money  relating  to any  lease  which  is
capitalized  on  the   consolidated   balance  sheet  of  the  Company  and  its
subsidiaries in accordance with generally accepted  accounting  principles as in
effect from time to time,  or  evidenced  by bonds,  debentures,  notes or other
similar  instruments,  and  in  each  case,  amendments,  renewals,  extensions,
modifications  and refundings of any such  indebtedness or obligations,  whether
existing  as of the  date of this  Indenture  or  subsequently  incurred  by the
Company unless, in the case of any particular indebtedness,  renewal,  extension
or refunding,  the instrument  creating or evidencing the same or the assumption
or guarantee of the same  expressly  provides that such  indebtedness,  renewal,
extension  or  refunding is not superior in right of payment to or is pari passu
with the Securities; provided that the Company's obligations under the Guarantee
shall not be deemed to be Senior Indebtedness.

               "Special  Record Date" for the payment of any Defaulted  Interest
on the  Securities  of any series means a date fixed by the Trustee  pursuant to
Section 307.

               "Stated  Maturity",  when used with respect to any  obligation or
any  installment  of principal  thereof or interest  thereon,  means the date on
which the  principal  of such  obligation  or such  installment  of principal or
interest is stated to be due and payable  (without  regard to any provisions for
redemption, prepayment, acceleration, purchase or extension).


                                       -7-

               "Trust" means MP&L Capital I, a statutory  business trust created
under the laws of the State of Delaware,  or any other Trust designated pursuant
to  Section  301 hereof or any  permitted  successor  under the Trust  Agreement
pertaining to such Trust.

               "Trust Agreement" means the Amended and Restated Trust Agreement,
dated as of , 1996,  relating to MP&L Capital I or an Amended and Restated Trust
Agreement relating to a Trust designated pursuant to Section 301 hereof, in each
case,  among the Company,  as Depositor,  the trustees named therein and several
holders referred to therein as they may be amended from time to
      time.

               "Trust  Indenture Act" means, as of any time, the Trust Indenture
Act of 1939, or any successor statute, as in effect at such time.

               "Trustee"  means the Person  named as the  "Trustee" in the first
paragraph of this  Indenture  until a successor  Trustee  shall have become such
with  respect to one or more series of  Securities  pursuant  to the  applicable
provisions of this  Indenture,  and thereafter  "Trustee"  shall mean or include
each  Person who is then a Trustee  hereunder,  and if at any time there is more
than one such Person,  "Trustee" as used with respect to the  Securities  of any
series shall mean the Trustee with respect to Securities of that series.

               "United   States"  means  the  United  States  of  America,   its
Territories,   its   possessions  and  other  areas  subject  to  its  political
jurisdiction.

SECTION 102. Compliance Certificates and Opinions

               Except as otherwise  expressly  provided in this Indenture,  upon
any  application  or  request by the  Company to the  Trustee to take any action
under any provision of this  Indenture,  the Company shall,  if requested by the
Trustee,  furnish  to the  Trustee an  Officer's  Certificate  stating  that all
conditions  precedent,  if any,  provided for in this Indenture  relating to the
proposed action  (including any covenants  compliance  with which  constitutes a
condition  precedent)  have been complied with and an Opinion of Counsel stating
that in the opinion of such counsel all such conditions precedent,  if any, have
been complied with,  except that in the case of any such  application or request
as to which the  furnishing of such  documents is  specifically  required by any
provision of this Indenture relating to such particular  application or request,
no additional certificate or opinion need be furnished.

               Every  certificate  or opinion with respect to compliance  with a
condition or covenant provided for in this Indenture shall include:

               (a) a statement  that each Person  signing  such  certificate  or
      opinion has read such  covenant or condition  and the  definitions  herein
      relating thereto;

               (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;


                                       -8-

               (c) a statement  that,  in the opinion of each such Person,  such
      Person has made such  examination  or  investigation  as is  necessary  to
      enable  such  Person 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,  in the  opinion  of each  such
      Person, such condition or covenant has been complied with.

SECTION 103. Form of Documents Delivered to Trustee.

               In any case where  several  matters are  required to be certified
by, or covered by an opinion of, any specified  Person, it is not necessary that
all such  matters be  certified  by, or covered by the opinion of, only one such
Person,  or that they be so certified or covered by only one  document,  but one
such Person may certify or give an opinion  with respect to some matters and one
or more other such Persons as to other matters,  and any such Person may certify
or give an opinion as to such matters in one or several documents.

               Any  certificate  or opinion of an officer of the  Company may be
based, insofar as it relates to legal matters, upon a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or  representations
with respect to the matters upon which such Officer's Certificate or opinion are
based are  erroneous.  Any such  certificate or Opinion of Counsel may be based,
insofar as it relates to factual  matters,  upon a certificate or opinion of, or
representations  by, an officer or  officers  of the  Company  stating  that the
information  with respect to such factual  matters is in the  possession  of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know,  that the certificate or opinion or  representations  with respect to such
matters are erroneous.

               Where any Person is required to make, give or execute two or more
applications,  requests, consents,  certificates,  statements, opinions or other
instruments  under this Indenture,  they may, but need not, be consolidated  and
form one instrument.

               Whenever,  subsequent  to the receipt by the Trustee of any Board
Resolution,  Officer's  Certificate,  Opinion of Counsel  or other  document  or
instrument,  a clerical,  typographical  or other  inadvertent or  unintentional
error or omission shall be discovered  therein, a new document or instrument may
be  substituted  therefor in corrected form with the same force and effect as if
originally filed in the corrected form and, irrespective of the date or dates of
the actual  execution  and/or  delivery  thereof,  such  substitute  document or
instrument shall be deemed to have been executed and/or delivered as of the date
or dates  required  with respect to the document or  instrument  for which it is
substituted. Anything in this Indenture to the contrary notwithstanding,  if any
such corrective  document or instrument  indicates that action has been taken by
or at the  request  of the  Company  which  could  not have  been  taken had the
original document or instrument not contained such error or omission, the action
so taken shall not be invalidated or otherwise rendered ineffective but shall be
and remain in full force and effect, except to the extent that such action was a
result of willful


                                       -9-

misconduct or bad faith.  Without  limiting the generality of the  foregoing,  
any  Securities  issued under the  authority of such  defective document  or  
instrument  shall  nevertheless  be the valid  obligations  of the Company 
entitled to the benefits of this Indenture  equally and ratably with all
other Outstanding Securities, except as aforesaid.

SECTION 104. Acts of Holders.

               (a)  Any  request,  demand,  authorization,   direction,  notice,
      consent, election, waiver or other action provided by this Indenture to be
      made, given or taken by Holders may be embodied in and evidenced by one or
      more instruments of substantially  similar tenor signed by such Holders in
      person or by an agent duly appointed in writing or, alternatively,  may be
      embodied  in and  evidenced  by the  record  of  Holders  voting  in favor
      thereof,  either in person or by proxies duly appointed in writing, at any
      meeting of Holders duly called and held in accordance  with the provisions
      of Article  Thirteen,  or a combination of such  instruments  and any such
      record.  Except as herein otherwise expressly provided,  such action shall
      become effective when such instrument or instruments or record or both are
      delivered to the Trustee and, where it is hereby  expressly  required,  to
      the Company.  Such  instrument or instruments and any such record (and the
      action  embodied  therein  and  evidenced  thereby)  are herein  sometimes
      referred  to as the  "Act"  of the  Holders  signing  such  instrument  or
      instruments  and so voting at any such meeting.  Proof of execution of any
      such  instrument  or of a writing  appointing  any such  agent,  or of the
      holding by any Person of a Security,  shall be sufficient  for any purpose
      of this Indenture and (subject to Section 901)  conclusive in favor of the
      Trustee and the Company,  if made in the manner  provided in this Section.
      The  record of any  meeting  of  Holders  shall be  proved  in the  manner
      provided in Section 1306.

               (b) The fact and date of the  execution by any Person of any such
      instrument  or writing may be proved by the affidavit of a witness of such
      execution  or  by a  certificate  of a  notary  public  or  other  officer
      authorized by law to take  acknowledgments  of deeds,  certifying that the
      individual  signing such  instrument  or writing  acknowledged  to him the
      execution  thereof or may be proved in any other  manner which the Trustee
      and the  Company  deem  sufficient.  Where such  execution  is by a signer
      acting in a capacity other than his individual capacity,  such certificate
      or affidavit shall also constitute sufficient proof of his authority.

               (c) The principal amount and serial numbers of Securities held by
      any  Person,  and the date of  holding  the  same,  shall be proved by the
      Security Register.

               (d)  Any  request,  demand,  authorization,   direction,  notice,
      consent, election, waiver or other Act of a Holder shall bind every future
      Holder of the same Security and the Holder of every  Security  issued upon
      the  registration of transfer  thereof or in exchange  therefor or in lieu
      thereof in respect of anything done, omitted or suffered to be done by the
      Trustee or the Company in  reliance  thereon,  whether or not  notation of
      such action is made upon such Security.


                                       -10-

               (e)  Until  such  time as  written  instruments  shall  have been
      delivered  to the Trustee  with  respect to the  requisite  percentage  of
      principal  amount  of  Securities  for  the  action  contemplated  by such
      instruments, any such instrument executed and delivered by or on behalf of
      a Holder may be revoked with respect to any or all of such  Securities  by
      written  notice by such  Holder or any  subsequent  Holder,  proven in the
      manner in which such instrument was proven.

               (f) Securities of any series  authenticated  and delivered  after
      any Act of Holders  may,  and shall if  required  by the  Trustee,  bear a
      notation in form  approved  by the Trustee as to any action  taken by such
      Act of Holders.  If the Company shall so determine,  new Securities of any
      series so modified  as to  conform,  in the opinion of the Trustee and the
      Company,  to such action may be prepared  and  executed by the Company and
      authenticated  and  delivered by the Trustee in exchange  for  Outstanding
      Securities of such series.

               (g) If the  Company  shall  solicit  from  Holders  any  request,
      demand,  authorization,  direction,  notice, consent, waiver or other Act,
      the  Company  may,  at its  option,  fix in advance a record  date for the
      determination   of  Holders   entitled  to  give  such  request,   demand,
      authorization,  direction,  notice,  consent, waiver or other Act, but the
      Company shall have no obligation to do so. If such a record date is fixed,
      such request, demand, authorization, direction, notice, consent, waiver or
      other Act may be given  before or after  such  record  date,  but only the
      Holders of record at the close of  business  on the  record  date shall be
      deemed to be Holders for the purposes of  determining  whether  Holders of
      the requisite proportion of the Outstanding  Securities have authorized or
      agreed or consented to such  request,  demand,  authorization,  direction,
      notice, consent, waiver or other Act, and for that purpose the Outstanding
      Securities shall be computed as of the record date.

SECTION 105.  Notices, etc. to Trustee and Company.

               Any request, demand,  authorization,  direction, notice, consent,
election,  waiver or Act of Holders or other  document  provided or permitted by
this  Indenture  to be made upon,  given or  furnished  to, or filed  with,  the
Trustee by any Holder or by the Company, or the Company by the Trustee or by any
Holder, shall be sufficient for every purpose hereunder (unless otherwise herein
expressly  provided)  if in writing and  delivered  personally  to an officer or
other  responsible  employee  of the  addressee,  or  transmitted  by  facsimile
transmission or other direct written  electronic  means to such telephone number
or other electronic communications address as the parties hereto shall from time
to time  designate,  or  transmitted  by certified or registered  mail,  charges
prepaid, to the applicable


                                       -11-

address set opposite such party's name below or to such  other  address  as  
either  party  hereto  may from  time to time designate:

                       If to the Trustee, to:

                       The Bank of New York
                       101 Barclay Street, 21 West
                       New York, New York  10286

                       Attention: Vice President, Corporate Trust Administration
                       Telephone: (212) 815-5291
                       Telecopy: (212) 815-5915

                       If to the Company, to:

                       Minnesota Power & Light Company
                       30 West Superior Street
                       Duluth, Minnesota  55802

                       Attention: James K. Vizanko
                       Telephone: (218) 722-2641
                       Telecopy: (218) 723-3912


               Any  communication  contemplated  herein  shall be deemed to have
been made, given,  furnished and filed if personally  delivered,  on the date of
delivery,  if  transmitted  by facsimile  transmission  or other direct  written
electronic means, on the date of transmission,  and if transmitted by registered
mail, on the date of receipt.

SECTION 106.  Notice to Holders of Securities; Waiver.

               Except  as  otherwise  expressly  provided  herein,   where  this
Indenture  provides  for notice to Holders of any event,  such  notice  shall be
sufficiently  given,  and shall be deemed  given,  to Holders if in writing  and
mailed,  first-class  postage prepaid, to each Holder affected by such event, at
the address of such  Holder as it appears in the  Security  Register,  not later
than the latest date,  if any, and not earlier than the earliest  date,  if any,
prescribed for the giving of such notice.

               In case by reason of the suspension of regular mail service or by
reason  of any other  cause it shall be  impracticable  to give  such  notice to
Holders by mail,  then such  notification  as shall be made with the approval of
the  Trustee  shall  constitute  a  sufficient  notification  for every  purpose
hereunder.  In any case 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.


                                       -12-

               Any notice required by this Indenture may be waived in writing by
the Person  entitled to receive  such notice,  either  before or after the event
otherwise to be specified  therein,  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.

SECTION 107.  Conflict with Trust Indenture Act.

               If any provision of this Indenture limits, qualifies or conflicts
with another provision hereof which is required or deemed to be included in this
Indenture  by, or is otherwise  governed by, any of the  provisions of the Trust
Indenture Act, such other provision shall control;  and if any provision  hereof
otherwise  conflicts with the Trust Indenture Act, the Trust Indenture Act shall
control.

SECTION 108.  Effect of Headings and Table of Contents.

               The Article and Section  headings in this Indenture and the Table
of  Contents  are for  convenience  only and shall not affect  the  construction
hereof.

SECTION 109.  Successors and Assigns.

               All covenants and agreements in this Indenture by the Company and
Trustee shall bind their respective successors and assigns, whether so expressed
or not.

SECTION 110.  Separability Clause.

               In case any provision in this Indenture or the  Securities  shall
be invalid, illegal or unenforceable,  the validity, legality and enforceability
of the  remaining  provisions  shall  not in any  way be  affected  or  impaired
thereby.

SECTION 111.  Benefits of Indenture.

               Nothing in this Indenture or the Securities,  express or implied,
shall  give to any  Person,  other than the  parties  hereto,  their  successors
hereunder,  the Holders  and, so long as the notice  described  in Section  1513
hereof has not been given,  the holders of Senior  Indebtedness,  any benefit or
any legal or equitable  right,  remedy or claim under this Indenture;  provided,
however, if the Property Trustee fails to enforce its rights with respect to the
Securities or the related Trust Agreement,  a holder of Preferred Securities may
institute  a legal  proceeding  directly  against  the  Company to  enforce  the
Property  Trustee's  rights  with  respect  to  the  Securities  or  such  Trust
Agreement, to the fullest extent permitted by law, without first instituting any
legal proceeding against the Property Trustee or any other person or entity.


                                       -13-


SECTION 112.  Governing Law.

               This  Indenture  and the  Securities  shall  be  governed  by and
construed in  accordance  with the laws of the State of New York,  except to the
extent that the law of any other jurisdiction shall be mandatorily applicable.

SECTION 113.  Legal Holidays.

               In any case where any Interest  Payment Date,  Redemption Date or
Stated  Maturity  of any  Security  shall not be a Business  Day at any Place of
Payment,  then  (notwithstanding any other provision of this Indenture or of the
Securities  other than a provision in Securities of any series,  or in the Board
Resolution  or  Officer's   Certificate  which  establishes  the  terms  of  the
Securities of such series,  which specifically  states that such provision shall
apply in lieu of this Section) payment of interest or principal and premium,  if
any, need not be made at such Place of Payment on such date,  but may be made on
the next succeeding  Business Day at such Place of Payment,  except that if such
Business Day is in the next succeeding calendar year, such payment shall be made
on the immediately  preceding Business Day, in each case with the same force and
effect,  and in the same  amount,  as if made on the  Interest  Payment  Date or
Redemption  Date,  or at the Stated  Maturity,  as the case may be, and, if such
payment is made or duly  provided for on such  Business  Day, no interest  shall
accrue on the amount so  payable  for the  period  from and after such  Interest
Payment Date,  Redemption Date or Stated  Maturity,  as the case may be, to such
Business Day.


                                   ARTICLE TWO

                                 Security Forms

SECTION 201.  Forms Generally.

               The   definitive   Securities   of  each   series   shall  be  in
substantially   the  form  or  forms  thereof   established   in  the  indenture
supplemental   hereto   establishing  such  series  or  in  a  Board  Resolution
establishing  such  series,  or in an  Officer's  Certificate  pursuant  to such
supplemental  indenture or Board Resolution,  in each case with such appropriate
insertions,  omissions,  substitutions  and other  variations as are required or
permitted by this Indenture,  and may have such letters,  numbers or other marks
of  identification  and such legends or  endorsements  placed  thereon as may be
required  to  comply  with  the  rules  of any  securities  exchange  or as may,
consistently  herewith, be determined by the officers executing such Securities,
as  evidenced  by their  execution  of the  Securities.  If the form or forms of
Securities  of  any  series  are  established  in a  Board  Resolution  or in an
Officer's Certificate pursuant to a Board Resolution,  such Board Resolution and
Officer's Certificate,  if any, shall be delivered to the Trustee at or prior to
the  delivery  of  the  Company  Order  contemplated  by  Section  303  for  the
authentication and delivery of such Securities.


                                       -14-

               Unless  otherwise  specified as  contemplated by Section 301, the
Securities of each series shall be issuable in registered form without  coupons.
The  definitive  Securities  shall  be  produced  in such  manner  as  shall  be
determined  by the officers  executing  such  Securities,  as evidenced by their
execution thereof.

SECTION 202.  Form of Trustee's Certificate of Authentication.

               The  Trustee's   certificate  of   authentication   shall  be  in
substantially the form set forth below:

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


                                            ---------------------------------
                                            as Trustee


                                            By:
                                               ------------------------------
                                                    Authorized Signatory


                                  ARTICLE THREE

                                 The Securities


SECTION 301. Amount Unlimited; Issuable in Series.

               The  aggregate  principal  amount  of  Securities  which  may  be
authenticated  and  delivered  under  this  Indenture  is  unlimited;  provided,
however,  that  all  Securities  shall be  issued  to a Trust  in  exchange  for
securities of the Company or to evidence loans by a Trust of the proceeds of the
issuance of Preferred  Securities of such Trust plus the amount deposited by the
Company with such Trust from time to time.

               The Securities may be issued in one or more series.  Prior to the
authentication  and  delivery  of  Securities  of  any  series  there  shall  be
established  by  specification  in  a  supplemental  indenture  or  in  a  Board
Resolution,  or in an Officer's Certificate pursuant to a supplemental indenture
or a Board Resolution:

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

               (b)  any  limit  upon  the  aggregate  principal  amount  of  the
      Securities of such series which may be  authenticated  and delivered under
      this Indenture (except for

                                       -15-

      Securities authenticated  and delivered upon registration of transfer of, 
      or in exchange  for, or in lieu of, other Securities of such series 
      pursuant to Section 304, 305, 306, 406 or 1206 and except for any 
      Securities  which,  pursuant to Section  303, are deemed never to have 
      been authenticated and delivered hereunder);

               (c) the Person or Persons (without  specific  identification)  to
      whom  interest  on  Securities  of such  series  shall be  payable  on any
      Interest  Payment  Date,  if other than the  Persons  in whose  names such
      Securities (or one or more  Predecessor  Securities) are registered at the
      close of business on the Regular Record Date for such interest;

               (d) the date or dates on which the principal of the Securities of
      such series is payable or any  formulary or other method or other means by
      which such date or dates shall be  determined,  by  reference or otherwise
      (without   regard   to  any   provisions   for   redemption,   prepayment,
      acceleration, purchase or extension);

               (e) the  rate or rates at which  the  Securities  of such  series
      shall bear interest,  if any (including the rate or rates at which overdue
      principal  shall bear  interest,  if  different  from the rate or rates at
      which such  Securities  shall bear  interest  prior to  Maturity,  and, if
      applicable,  the rate or rates at which overdue  premium or interest shall
      bear interest, if any), or any formulary or other method or other means by
      which such rate or rates shall be  determined,  by reference or otherwise;
      the date or dates from which such  interest  shall  accrue;  the  Interest
      Payment  Dates on which such  interest  shall be payable  and the  Regular
      Record Date,  if any, for the interest  payable on such  Securities on any
      Interest  Payment  Date;  the right of the Company,  if any, to extend the
      interest  payment  periods  and the  duration  of any  such  extension  as
      contemplated by Section 311; and the basis of computation of interest,  if
      other than as provided in Section 310;

               (f) the  place or  places  at which or  methods  by which (1) the
      principal of and premium,  if any, and interest,  if any, on Securities of
      such series shall be payable,  (2)  registration of transfer of Securities
      of such series may be effected, (3) exchanges of Securities of such series
      may be  effected  and (4)  notices  and  demands to or upon the Company in
      respect of the Securities of such series and this Indenture may be served;
      the Security  Registrar for such series; and if such is the case, that the
      principal  of such  Securities  shall be payable  without  presentment  or
      surrender thereof;

               (g) the period or periods  within which,  or the date or dates on
      which,  the price or prices  at which  and the terms and  conditions  upon
      which the Securities of such series may be redeemed,  in whole or in part,
      at the option of the Company  and any  restrictions  on such  redemptions,
      including but not limited to a restriction on a partial  redemption by the
      Company of the  Securities  of any series,  resulting in delisting of such
      Securities from any national exchange;


                                       -16-

               (h) the  obligation  or  obligations,  if any,  of the Company to
      redeem or purchase the  Securities of such series  pursuant to any sinking
      fund or other mandatory redemption provisions or at the option of a Holder
      thereof  and the  period or periods  within  which or the date or dates on
      which,  the price or prices  at which  and the terms and  conditions  upon
      which such Securities shall be redeemed or purchased, in whole or in part,
      pursuant to such obligation, and applicable exceptions to the requirements
      of Section 404 in the case of mandatory  redemption  or  redemption at the
      option of the Holder;

               (i) the denominations in which Securities of such series shall be
      issuable  if other than  denominations  of $25 and any  integral  multiple
      thereof;

               (j) the currency or currencies,  including composite  currencies,
      in which payment of the principal of and premium, if any, and interest, if
      any, on the  Securities  of such series shall be payable (if other than in
      Dollars);

               (k) if the principal of or premium, if any, or interest,  if any,
      on the Securities of such series are to be payable, at the election of the
      Company  or a Holder  thereof,  in a coin or  currency  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;

               (l) if the principal of or premium, if any, or interest,  if any,
      on the  Securities of such series are to be payable,  or are to be payable
      at the election of the Company or a Holder thereof, in securities or other
      property, the type and amount of such securities or other property, or the
      formulary  or other  method or other means by which such  amount  shall be
      determined,  and the period or  periods  within  which,  and the terms and
      conditions upon which, any such election may be made;

               (m) if the amount  payable in respect of principal of or premium,
      if any,  or  interest,  if any,  on the  Securities  of such series may be
      determined with reference to an index or other fact or event ascertainable
      outside  this  Indenture,  the  manner  in  which  such  amounts  shall be
      determined  to the extent not  established  pursuant to clause (e) of this
      paragraph;

               (n) if other than the principal  amount  thereof,  the portion of
      the  principal  amount of Securities of such series which shall be payable
      upon  declaration  of  acceleration  of the Maturity  thereof  pursuant to
      Section 802;

               (o) any Events of  Default,  in addition  to those  specified  in
      Section  801,  with  respect to the  Securities  of such  series,  and any
      covenants of the Company for the benefit of the Holders of the  Securities
      of such series, in addition to those set forth in Article Six;


                                       -17-

               (p) the terms,  if any,  pursuant to which the Securities of such
      series may be converted  into or exchanged  for shares of capital stock or
      other securities of the Company or any other Person;

               (q) the  obligations  or  instruments,  if any,  which  shall  be
      considered to be Government  Obligations  in respect of the  Securities of
      such series denominated in a currency other than Dollars or in a composite
      currency,   and  any   additional  or   alternative   provisions  for  the
      reinstatement of the Company's  indebtedness in respect of such Securities
      after the satisfaction and discharge thereof as provided in Section 701;

               (r) if the  Securities  of such series are to be issued in global
      form,  (i) any  limitations on the rights of the Holder or Holders of such
      Securities to transfer or exchange the same or to obtain the  registration
      of transfer  thereof,  (ii) any limitations on the rights of the Holder or
      Holders thereof to obtain certificates therefor in definitive form in lieu
      of temporary  form and (iii) any and all other matters  incidental to such
      Securities;

               (s) if the Securities of such series are to be issuable as bearer
      securities,   any  and  all  matters  incidental  thereto  which  are  not
      specifically  addressed in a  supplemental  indenture as  contemplated  by
      clause (g) of Section 1201;

               (t) to the extent not established  pursuant to clause (r) of this
      paragraph,  any limitations on the rights of the Holders of the Securities
      of such Series to transfer or exchange  such  Securities  or to obtain the
      registration of transfer thereof; and if a service charge will be made for
      the  registration of transfer or exchange of Securities of such series the
      amount or terms thereof;

               (u) any exceptions to Section 113, or variation in the definition
      of Business Day, with respect to the Securities of such series;

               (v) the  designation  of the  Trust to which  Securities  of such
      series are to be issued; and

               (w)  any  other  terms  of the  Securities  of  such  series  not
      inconsistent with the provisions of this Indenture.

               All   Securities  of  any  one  series  shall  be   substantially
identical,  except as to principal amount and date of issue and except as may be
set forth in the terms of such series as contemplated  above.  The Securities of
each series shall be subordinated in right of payment to Senior  Indebtedness as
provided in Article Fifteen.


                                       -18-

SECTION 302.  Denominations.

               Unless  otherwise  provided as  contemplated  by Section 301 with
respect to any series of  Securities,  the  Securities  of each series  shall be
issuable in denominations of $25 and any integral multiple thereof.

SECTION 303.  Execution, Authentication, Delivery and Dating.

               Unless  otherwise  provided as  contemplated  by Section 301 with
respect to any series of Securities,  the Securities shall be executed on behalf
of the Company by an Authorized  Officer and may have the corporate  seal of the
Company affixed thereto or reproduced  thereon  attested by any other Authorized
Officer or by the  Secretary  or an  Assistant  Secretary  of the  Company.  The
signature  of any or all of these  officers on the  Securities  may be manual or
facsimile.

               Securities   bearing  the  manual  or  facsimile   signatures  of
individuals  who  were  at the  time of  execution  Authorized  Officers  or the
Secretary  or an  Assistant  Secretary  of the Company  shall bind the  Company,
notwithstanding  that such  individuals  or any of them have ceased to hold such
offices prior to the  authentication  and delivery of such Securities or did not
hold such offices at the date of such Securities.

               The  Trustee  shall  authenticate  and  deliver  Securities  of a
series,  for original issue, at one time or from time to time in accordance with
the Company Order referred to below, upon receipt by the Trustee of:

               (a) the instrument or instruments  establishing the form or forms
      and terms of such series, as provided in Sections 201 and 301;

               (b) a Company Order requesting the authentication and delivery of
      such Securities and, to the extent that the terms of such Securities shall
      not have been  established  in an  indenture  supplemental  hereto or in a
      Board  Resolution,   or  in  an  Officer's   Certificate   pursuant  to  a
      supplemental  indenture  or  Board  Resolution,  all  as  contemplated  by
      Sections 201 and 301, establishing such terms;

               (c) the  Securities  of such  series,  executed  on behalf of the
      Company by an Authorized Officer;

               (d) an Opinion of Counsel to the effect that:

                     (i) the form or forms of such  Securities  have  been  duly
                  authorized  by  the  Company  and  have  been  established  in
                  conformity with the provisions of this Indenture;


                                       -19-

                     (ii) the terms of such Securities have been duly authorized
                  by the Company and have been  established  in conformity  with
                  the provisions of this Indenture; and

                     (iii) such Securities,  when authenticated and delivered by
                  the  Trustee  and issued and  delivered  by the Company in the
                  manner and subject to any conditions specified in such Opinion
                  of Counsel,  will have been duly issued  under this  Indenture
                  and will constitute  valid and legally binding  obligations of
                  the  Company,  entitled  to  the  benefits  provided  by  this
                  Indenture,  and  enforceable  in accordance  with their terms,
                  subject,  as to enforcement,  to laws relating to or affecting
                  generally the  enforcement  of creditors'  rights,  including,
                  without  limitation,  bankruptcy  and  insolvency  laws and to
                  general  principles  of equity  (regardless  of  whether  such
                  enforceability  is  considered in a proceeding in equity or at
                  law).

               If the form or terms of the  Securities  of any series  have been
established by or pursuant to a Board Resolution or an Officer's  Certificate as
permitted  by  Sections  201 or  301,  the  Trustee  shall  not be  required  to
authenticate such Securities if the issuance of such Securities pursuant to this
Indenture will materially or adversely  affect the Trustee's own rights,  duties
or immunities  under the  Securities and this Indenture or otherwise in a manner
which is not reasonably acceptable to the Trustee.

               Unless  otherwise  specified as  contemplated by Section 301 with
respect to any series of  Securities,  each Security  shall be dated the date of
its authentication.

               Unless  otherwise  specified as  contemplated by Section 301 with
respect  to any series of  Securities,  no  Security  shall be  entitled  to any
benefit under this  Indenture or be valid or obligatory  for any purpose  unless
there appears on such Security a certificate of authentication  substantially in
the form provided for herein executed by the Trustee or an Authenticating  Agent
by manual signature,  and such certificate upon any Security shall be conclusive
evidence, and the only evidence,  that such Security has been duly authenticated
and  delivered  hereunder  and is  entitled to the  benefits of this  Indenture.
Notwithstanding the foregoing, if any Security shall have been authenticated and
delivered  hereunder to the  Company,  or any Person  acting on its behalf,  but
shall never have been  issued and sold by the  Company,  and the  Company  shall
deliver such Security to the Trustee for cancellation as provided in Section 309
together  with a written  statement  (which need not comply with Section 102 and
need not be accompanied by an Opinion of Counsel) stating that such Security has
never been issued and sold by the Company,  for all  purposes of this  Indenture
such  Security  shall be deemed never to have been  authenticated  and delivered
hereunder and shall never be entitled to the benefits hereof.

SECTION 304.  Temporary Securities.

               Pending the  preparation of definitive  Securities of any series,
the Company may execute,  and upon Company Order the Trustee shall  authenticate
and deliver, temporary


                                       -20-

Securities  which  are  printed,  lithographed,   typewritten,  mimeographed  or
otherwise produced, in any authorized  denomination,  substantially of the tenor
of the  definitive  Securities  in lieu of which  they  are  issued,  with  such
appropriate  insertions,  omissions,  substitutions  and other variations as the
officers  executing  such  Securities  may  determine,  as  evidenced  by  their
execution of such Securities;  provided, however, that temporary Securities need
not recite specific redemption, sinking fund, conversion or exchange provisions.

               Unless  otherwise  specified as  contemplated by Section 301 with
respect to the  Securities of any series,  after the  preparation  of definitive
Securities  of such series,  the  temporary  Securities  of such series shall be
exchangeable, without charge to the Holder thereof, for definitive Securities of
such series upon surrender of such temporary  Securities at the office or agency
of the Company maintained pursuant to Section 602 in a Place of Payment for such
Securities.  Upon such surrender of temporary Securities for such exchange,  the
Company shall,  except as aforesaid,  execute and the Trustee shall authenticate
and deliver in exchange  therefor  definitive  Securities of the same series, of
authorized denominations and of like tenor and aggregate principal amount.

               Until  exchanged in full as hereinabove  provided,  the temporary
Securities  of any series shall in all respects be entitled to the same benefits
under this  Indenture as  definitive  Securities  of the same series and of like
tenor authenticated and delivered hereunder.

SECTION 305. Registration, Registration of Transfer and Exchange.

               The  Company  shall  cause to be kept in each  office  designated
pursuant to Section  602,  with  respect to the  Securities  of each  series,  a
register (all registers kept in accordance with this Section being  collectively
referred to as the  "Security  Register") in which,  subject to such  reasonable
regulations as it may prescribe,  the Company shall provide for the registration
of  Securities  of such series and the  registration  of transfer  thereof.  The
Company  shall  designate  one Person to maintain the Security  Register for the
Securities of each series on a consolidated  basis,  and such Person is referred
to herein,  with respect to such series, as the "Security  Registrar."  Anything
herein to the contrary notwithstanding, the Company may designate one or more of
its offices as an office in which a register  with respect to the  Securities of
one or more series shall be maintained, and the Company may designate itself the
Security  Registrar  with  respect to one or more of such  series.  The Security
Register  shall be open for  inspection  by the  Trustee  and the Company at all
reasonable times.

               Except as otherwise specified as contemplated by Section 301 with
respect to the  Securities of any series,  upon  surrender for  registration  of
transfer  of any  Security of such series at the office or agency of the Company
maintained  pursuant to Section 602 in a Place of Payment for such  series,  the
Company shall execute,  and the Trustee shall  authenticate and deliver,  in the
name of the designated transferee or transferees,  one or more new Securities of
the same series,  of  authorized  denominations  and of like tenor and aggregate
principal amount.


                                       -21-

               Except as otherwise specified as contemplated by Section 301 with
respect to the  Securities  of any  series,  any  Security of such series may be
exchanged  at the option of the Holder,  for one or more new  Securities  of the
same  series,  of  authorized  denominations  and of like  tenor  and  aggregate
principal  amount,  upon surrender of the Securities to be exchanged at any such
office or agency.  Whenever any Securities are so surrendered for exchange,  the
Company shall  execute,  and the Trustee  shall  authenticate  and deliver,  the
Securities which the Holder making the exchange is entitled to receive.

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

               Every  Security  presented or  surrendered  for  registration  of
transfer or for exchange  shall (if so required by the  Company,  the Trustee or
the Security  Registrar) be duly endorsed or shall be  accompanied  by a written
instrument of transfer in form  satisfactory to the Company,  the Trustee or the
Security  Registrar,  as the case may be, duly executed by the Holder thereof or
his attorney duly authorized in writing.

               Unless  otherwise  specified as  contemplated by Section 301 with
respect to  Securities  of any series,  no service  charge shall be made for any
registration of transfer or exchange of Securities,  but the Company may require
payment of a sum sufficient to cover any tax or other  governmental  charge that
may be imposed in connection  with any  registration  of transfer or exchange of
Securities,  other  than  exchanges  pursuant  to Section  304,  406 or 1206 not
involving any transfer.

               The  Company  shall not be  required to execute or to provide for
the  registration of transfer of or the exchange of (a) Securities of any series
during a period of 15 days immediately  preceding the date of the mailing of any
notice  of  redemption  of such  Securities  called  for  redemption  or (b) any
Security so selected for  redemption in whole or in part,  except the unredeemed
portion of any Security being redeemed in part.

SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.

               If any  mutilated  Security is  surrendered  to the Trustee,  the
Company shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new  Security  of the same  series,  and of like tenor and  principal
amount and bearing a number not contemporaneously outstanding.

               If there  shall be  delivered  to the Company and the Trustee (a)
evidence to their satisfaction of the ownership of and the destruction,  loss or
theft of any  Security and (b) such  security or indemnity as may be  reasonably
required by them to save each of them and any agent of either of them  harmless,
then,  in the absence of notice to the Company or the Trustee that such Security
is held by a Person  purporting  to be the owner of such  Security,  the Company
shall execute and the Trustee  shall  authenticate  and deliver,  in lieu of any
such


                                       -22-

destroyed,  lost or stolen Security,  a new Security of the same series,  and of
like  tenor and  principal  amount and  bearing a number  not  contemporaneously
outstanding.

               Notwithstanding  the  foregoing,  in  case  any  such  mutilated,
destroyed,  lost or stolen  Security  has  become or is about to become  due and
payable,  the Company in its discretion may,  instead of issuing a new Security,
pay such Security.

               Upon the issuance of any new  Security  under this  Section,  the
Company 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
reasonable  expenses  (including the fees and expenses of the Trustee) connected
therewith.

               Every new Security of any series issued  pursuant to this Section
in lieu of any destroyed,  lost or stolen Security shall  constitute an original
additional contractual obligation of the Company,  whether or not the destroyed,
lost or stolen  Security  shall be at any time  enforceable by anyone other than
the Holder of such new Security,  and any such new Security shall be entitled to
all the benefits of this Indenture equally and proportionately  with any and all
other Securities of such series duly issued hereunder.

               The  provisions of this Section are exclusive and shall  preclude
(to the  extent  lawful)  all other  rights  and  remedies  with  respect to the
replacement or payment of mutilated, destroyed, lost or stolen Securities.

SECTION 307.  Payment of Interest; Interest Rights Preserved.

               Unless  otherwise  specified as  contemplated by Section 301 with
respect to the  Securities  of any  series,  interest on any  Security  which is
payable,  and is punctually  paid or duly provided for, on any Interest  Payment
Date  shall be paid to the Person in whose  name that  Security  (or one or more
Predecessor  Securities)  is  registered at the close of business on the Regular
Record Date for such interest.

               Subject to Section  311,  any  interest  on any  Security  of any
series which is payable, but is not punctually paid or duly provided for, on any
Interest Payment Date (herein called "Defaulted Interest") shall forthwith cease
to be payable  to the Holder on the  related  Regular  Record  Date by virtue of
having been such Holder, and such Defaulted Interest may be paid by the Company,
at its election in each case, as provided in clause (a) or (b) below:

               (a) The  Company  may  elect  to make  payment  of any  Defaulted
      Interest to the Persons in whose names the  Securities  of such series (or
      their  respective  Predecessor  Securities) are registered at the close of
      business on a date (herein called a "Special Record Date") for the payment
      of such Defaulted Interest,  which shall be fixed in the following manner.
      The Company shall notify the Trustee in writing of the amount of Defaulted
      Interest  proposed to be paid on each Security of such series and the date
      of the proposed  payment,  and at the same time the Company  shall deposit
      with the Trustee an amount of money equal to the aggregate amount proposed
      to be paid in


                                       -23- 

      respect of such Defaulted Interest or shall make arrangements satisfactory
      to the  Trustee for such  deposit on or prior to the date of the  proposed
      payment,  such money when deposited to be held in trust for the benefit of
      the  Persons  entitled  to  such  Defaulted  Interest  as in  this  clause
      provided.  Thereupon the Trustee  shall fix a Special  Record Date for the
      payment of such  Defaulted  Interest  which shall be not more than 15 days
      and not less than 10 days prior to the date of the  proposed  payment  and
      not less than 10 days after the  receipt  by the  Trustee of the notice of
      the proposed  payment.  The Trustee shall  promptly  notify the Company of
      such  Special  Record  Date  and,  in the name and at the  expense  of the
      Company,  shall  promptly  cause  notice of the  proposed  payment of such
      Defaulted  Interest  and the Special  Record  Date  therefor to be mailed,
      first-class  postage prepaid,  to each Holder of Securities of such series
      at the address of such Holder as it appears in the Security Register,  not
      less  than 10 days  prior  to such  Special  Record  Date.  Notice  of the
      proposed  payment of such  Defaulted  Interest and the Special Record Date
      therefor having been so mailed,  such Defaulted  Interest shall be paid to
      the  Persons  in whose  names  the  Securities  of such  series  (or their
      respective Predecessor Securities) are registered at the close of business
      on such Special Record Date.

               (b) The Company may make payment of any Defaulted Interest on the
      Securities of any series in any other lawful manner not inconsistent  with
      the  requirements of any securities  exchange on which such Securities may
      be listed,  and upon such notice as may be required by such exchange,  if,
      after notice  given by the Company to the Trustee of the proposed  payment
      pursuant  to  this  clause,   such  manner  of  payment  shall  be  deemed
      practicable by the Trustee.

               Subject to the  foregoing  provisions of this Section and Section
305, each Security  delivered under this Indenture upon registration of transfer
of or in exchange for or in lieu of any other Security shall carry the rights to
interest  accrued and unpaid,  and to accrue,  which were  carried by such other
Security.

SECTION 308.  Persons Deemed Owners.

               Prior  to due  presentment  of a  Security  for  registration  of
transfer,  the Company,  the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name such  Security is  registered as the absolute
owner of such Security for the purpose of receiving  payment of principal of and
premium, if any, and (subject to Sections 305 and 307) interest, if any, on such
Security and for all other purposes whatsoever,  whether or not such Security be
overdue,  and neither the  Company,  the Trustee nor any agent of the Company or
the Trustee shall be affected by notice to the contrary.

SECTION 309.  Cancellation by Security Registrar.

               All Securities surrendered for payment, redemption,  registration
of transfer or  exchange  shall,  if  surrendered  to any Person  other than the
Security  Registrar,  be  delivered  to  the  Security  Registrar  and,  if  not
theretofore canceled, shall be promptly canceled by the


                                       -24-

Security  Registrar.  The Company may at any time  deliver to the  Security
Registrar for cancellation any Securities previously authenticated and delivered
hereunder which the Company may have acquired in any manner  whatsoever or which
the Company  shall not have issued and sold,  and all  Securities  so  delivered
shall be promptly  canceled by the Security  Registrar.  No Securities  shall be
authenticated in lieu of or in exchange for any Securities  canceled as provided
in this Section,  except as expressly permitted by this Indenture.  All canceled
Securities  held by the Security  Registrar  shall be disposed of in  accordance
with a Company Order  delivered to the Security  Registrar and the Trustee,  and
the Security  Registrar  shall promptly  deliver a certificate of disposition to
the Trustee and the Company unless, by a Company Order, similarly delivered, the
Company  shall direct that  canceled  Securities be returned to it. The Security
Registrar shall promptly  deliver  evidence of any cancellation of a Security in
accordance with this Section 309 to the Trustee and the Company.

SECTION 310.  Computation of Interest.

               Except as otherwise  specified as contemplated by Section 301 for
Securities  of any series,  interest on the  Securities  of each series shall be
computed on the basis of a 360-day year  consisting  of twelve 30-day months and
for any period  shorter than a full month,  on the basis of the actual number of
days elapsed in such period.

SECTION 311.  Extension of Interest Payment.

               The  Company  shall  have the right at any  time,  so long as the
Company is not in default in the payment of interest  on the  Securities  of any
series hereunder, to extend interest payment periods on all Securities of one or
more series, if so specified as contemplated by Section 301 with respect to such
Securities  and upon such terms as may be specified as  contemplated  by Section
301 with respect to such Securities.

SECTION 312. Additional Interest.

               So long as any Preferred  Securities remain  outstanding,  if the
Trust which  issued such  Preferred  Securities  shall be required to pay,  with
respect to its income  derived from the interest  payments on the  Securities of
any series, any amounts for or on account of any taxes,  duties,  assessments or
governmental  charges of whatever  nature imposed by the United  States,  or any
other taxing authority, then, in any such case, the Company will pay as interest
on such  series  such  additional  interest  ("Additional  Interest")  as may be
necessary  in order that the net  amounts  received  and  retained by such Trust
after the payment of such taxes,  duties,  assessments or  governmental  charges
shall  result in such  Trust's  having  such  funds as it would  have had in the
absence of the  payment  of such  taxes,  duties,  assessments  or  governmental
charges.


                                       -25-

                                  ARTICLE FOUR

                            Redemption of Securities

SECTION 401.  Applicability of Article.

               Securities of any series which are redeemable before their Stated
Maturity  shall be  redeemable  in  accordance  with their  terms and (except as
otherwise  specified  as  contemplated  by Section  301 for  Securities  of such
series) in accordance with this Article.

SECTION 402.  Election to Redeem; Notice to Trustee.

               The  election  of the Company to redeem any  Securities  shall be
evidenced by a Board Resolution or an Officer's Certificate.  The Company shall,
at least 45 days prior to the  Redemption  Date fixed by the  Company  (unless a
shorter  notice shall be  satisfactory  to the  Trustee),  notify the Trustee in
writing of such Redemption  Date and of the principal  amount of such Securities
to be redeemed.  In the case of any  redemption of  Securities  (a) prior to the
expiration of any restriction on such  redemption  provided in the terms of such
Securities or elsewhere in this  Indenture or (b) pursuant to an election of the
Company  which  is  subject  to a  condition  specified  in the  terms  of  such
Securities,  the Company shall furnish the Trustee with an Officer's Certificate
evidencing compliance with such restriction or condition.

SECTION 403.  Selection of Securities to Be Redeemed.

               If less than all the Securities of any series are to be redeemed,
the  particular  Securities to be redeemed shall be selected by the Trustee from
the Outstanding  Securities of such series not previously called for redemption,
by such  method  as shall be  provided  for any  particular  series,  or, in the
absence of any such provision, by such method as the Trustee shall deem fair and
appropriate  and which may provide for the selection for  redemption of portions
(equal to the minimum  authorized  denomination for Securities of such series or
any integral  multiple  thereof) of the  principal  amount of Securities of such
series of a denomination  larger than the minimum  authorized  denomination  for
Securities  of such  series;  provided,  however,  that if, as  indicated  in an
Officer's  Certificate,  the Company  shall have  offered to purchase all or any
principal amount of the Securities then Outstanding of any series, and less than
all of such  Securities as to which such offer was made shall have been tendered
to the Company for such purchase,  the Trustee, if so directed by Company Order,
shall select for redemption all or any principal amount of such Securities which
have not been so tendered.

               The Trustee  shall  promptly  notify the Company and the Security
Registrar in writing of the Securities  selected for redemption and, in the case
of any Securities  selected to be redeemed in part, 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 shall relate,
in the case of any Securities

                                       -26-

redeemed or to be redeemed only in part, to the portion of the principal  amount
of such Securities which has been or is to be redeemed.

SECTION 404.  Notice of Redemption.

               Notice of  redemption  shall be given in the manner  provided  in
Section 106 to the Holders of the Securities to be redeemed not less than 30 nor
more than 60 days prior to the Redemption Date.

               All notices of redemption shall state:

               (a) the Redemption Date,

               (b) the Redemption Price,

               (c) if less  than  all the  Securities  of any  series  are to be
      redeemed,  the identification of the particular  Securities to be redeemed
      and the portion of the principal  amount of any Security to be redeemed in
      part,

               (d) that on the Redemption  Date the Redemption  Price,  together
      with accrued interest, if any, to the Redemption Date, will become due and
      payable upon each such  Security to be redeemed and, if  applicable,  that
      interest thereon will cease to accrue on and after said date,

               (e)  the  place  or  places  where  such  Securities  are  to  be
      surrendered for payment of the Redemption Price and accrued  interest,  if
      any,  unless it shall have been specified as  contemplated  by Section 301
      with respect to such Securities that such surrender shall not be required,

               (f) that the  redemption  is for a sinking or other fund, if such
      is the case, and

               (g) such other  matters as the Company  shall deem  desirable  or
      appropriate.

               Unless  otherwise  specified  with respect to any  Securities  in
accordance  with  Section  301,  with  respect  to any notice of  redemption  of
Securities  at the  election  of the  Company,  unless,  upon the giving of such
notice,  such  Securities  shall be deemed to have been paid in accordance  with
Section 701,  such notice may state that such  redemption  shall be  conditional
upon the receipt by the Paying Agent or Agents for such Securities,  on or prior
to the date fixed for such redemption,  of money sufficient to pay the principal
of and premium,  if any, and interest,  if any, on such  Securities  and that if
such money shall not have been so received  such notice  shall be of no force or
effect and the Company shall not be required to redeem such  Securities.  In the
event that such notice of redemption contains such a condition and such money is
not so received,  the redemption  shall not be made and within a reasonable time
thereafter  notice  shall be  given,  in the  manner  in  which  the  notice  of
redemption  was given,  that such money was not so received and such  redemption
was not


                                       -27-

required to be made, and the Paying Agent or Agents for the Securities otherwise
to have been redeemed shall promptly  return to the Holders  thereof any of such
Securities which had been surrendered for payment upon such redemption.

               Notice of redemption of Securities to be redeemed at the election
of the Company, and any notice of non-satisfaction of a condition for redemption
as aforesaid, shall be given by the Company or, at the Company's request, by the
Security  Registrar  in the name and at the  expense of the  Company.  Notice of
mandatory  redemption of Securities shall be given by the Security  Registrar in
the name and at the expense of the Company.

SECTION 405.  Securities Payable on Redemption Date.

               Notice of  redemption  having  been given as  aforesaid,  and the
conditions,  if any,  set  forth  in such  notice  having  been  satisfied,  the
Securities or portions  thereof so to be redeemed shall, on the Redemption Date,
become due and payable at the Redemption Price therein  specified,  and from and
after such date (unless,  in the case of an unconditional  notice of redemption,
the Company  shall  default in the payment of the  Redemption  Price and accrued
interest,  if any) such  Securities or portions  thereof,  if  interest-bearing,
shall cease to bear interest. Upon surrender of any such Security for redemption
in accordance  with such notice,  such Security or portion thereof shall be paid
by the Company at the Redemption Price,  together with accrued interest, if any,
to the Redemption  Date;  provided,  however,  that no such surrender shall be a
condition to such payment if so  specified as  contemplated  by Section 301 with
respect to such  Security;  and  provided,  further,  that  except as  otherwise
specified  as  contemplated  by Section 301 with respect to such  Security,  any
installment of interest on any Security the Stated Maturity of which installment
is on or prior to the  Redemption  Date  shall be  payable to the Holder of such
Security, or one or more Predecessor Securities, registered as such at the close
of business on the related  Regular  Record Date  according to the terms of such
Security and subject to the provisions of Section 307.

SECTION 406.  Securities Redeemed in Part.

               Upon the  surrender of any Security  which is to be redeemed only
in part at a Place of Payment  therefor  (with, if the Company or the Trustee so
requires,  due  endorsement  by, or a written  instrument  of  transfer  in form
satisfactory to the Company and the Trustee duly executed by, the Holder thereof
or his attorney duly authorized in writing),  the Company shall execute, and the
Trustee shall  authenticate and deliver to the Holder of such Security,  without
service  charge,  a new  Security  or  Securities  of the  same  series,  of any
authorized  denomination  requested  by such  Holder  and of like  tenor  and in
aggregate  principal amount equal to and in exchange for the unredeemed  portion
of the principal of the Security so surrendered.


                                       -28-

                                  ARTICLE FIVE

                                  Sinking Funds

SECTION 501. Applicability of Article.

               The provisions of this Article shall be applicable to any sinking
fund for the  retirement of the  Securities  of any series,  except as otherwise
specified as contemplated by Section 301 for Securities of such series.

               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".  If provided for by the terms of Securities of
any  series,  the cash  amount of any  sinking  fund  payment  may be subject to
reduction as provided in Section 502. Each sinking fund payment shall be applied
to the redemption of Securities of the series in respect of which it was made as
provided for by the terms of such Securities.

SECTION 502.  Satisfaction of Sinking Fund Payments with Securities.

               The Company (a) may deliver to the Trustee Outstanding Securities
(other  than any  previously  called for  redemption)  of a series in respect of
which a  mandatory  sinking  fund  payment  is to be made and (b) may apply as a
credit Securities of such series which have been redeemed either at the election
of the  Company  pursuant  to the  terms  of  such  Securities  or  through  the
application of permitted optional sinking fund payments pursuant to the terms of
such Securities or Outstanding Securities purchased by the Company, in each case
in satisfaction  of all or any part of such mandatory  sinking fund payment with
respect to the Securities of such series; provided,  however, that no Securities
shall be applied in  satisfaction  of a mandatory  sinking  fund payment if such
Securities shall have been previously so applied. Securities so applied shall be
received and credited  for such purpose by the Trustee at the  Redemption  Price
specified in such  Securities  for redemption  through  operation of the sinking
fund and the amount of such  mandatory  sinking  fund  payment  shall be reduced
accordingly.

SECTION 503.  Redemption of Securities for Sinking Fund.

               Not less than 45 days prior to each sinking fund payment date for
the  Securities  of any  series,  the  Company  shall  deliver to the Trustee an
Officer's Certificate specifying:

               (a) the  amount of the next  succeeding  mandatory  sinking  fund
      payment for such series;

               (b) the amount,  if any, of the optional  sinking fund payment to
      be made together with such mandatory sinking fund payment;


                                       -29-

               (c) the aggregate sinking fund payment;

               (d) the portion,  if any, of such aggregate  sinking fund payment
      which is to be satisfied by the payment of cash;

               (e) the portion,  if any, of such aggregate  sinking fund payment
      which is to be satisfied by delivering  and  crediting  Securities of such
      series  pursuant  to Section 502 and stating the basis for such credit and
      that such Securities have not previously been so credited, and the Company
      shall also deliver to the Trustee any  Securities to be so  delivered.  If
      the  Company  shall  not  deliver  such  Officer's  Certificate,  the next
      succeeding  sinking fund payment for such series shall be made entirely in
      cash in the amount of the mandatory sinking fund payment. Not less than 30
      days before each such sinking  fund payment date the Trustee  shall select
      the  Securities  to be redeemed upon such sinking fund payment date in the
      manner specified in Section 403 and cause notice of the redemption thereof
      to be given in the name of and at the expense of the Company in the manner
      provided  in  Section  404.  Such  notice  having  been  duly  given,  the
      redemption  of such  Securities  shall be made  upon the  terms and in the
      manner stated in Sections 405 and 406.


                                   ARTICLE SIX

                                    Covenants

SECTION 601.  Payment of Principal, Premium and Interest.

               The Company shall pay the  principal of and premium,  if any, and
interest,  if any  (including  Additional  Interest),  on the Securities of each
series in accordance with the terms of such Securities and this Indenture.

SECTION 602.  Maintenance of Office or Agency.

               The  Company  shall  maintain  in each Place of  Payment  for the
Securities of each series an office or agency where  payment of such  Securities
shall be made, where the registration of transfer or exchange of such Securities
may be effected and where  notices and demands to or upon the Company in respect
of such  Securities  and this  Indenture  may be served.  The Company shall give
prompt  written  notice to the  Trustee of the  location,  and any change in the
location,  of each such office or agency and prompt notice to the Holders of any
such change in the manner  specified  in Section 106. If at any time the Company
shall  fail to  maintain  any such  required  office  or agency  in  respect  of
Securities of any series,  or shall fail to furnish the Trustee with the address
thereof,  payment of such Securities shall be made,  registration of transfer or
exchange  thereof may be effected and notices and demands in respect thereof may
be served at the Corporate  Trust Office of the Trustee,  and the Company hereby
appoints the Trustee as its agent for all such purposes in any such event.


                                       -30-

               The  Company  may also  from time to time  designate  one or more
other offices or agencies with respect to the  Securities of one or more series,
for any or all of the foregoing  purposes and may from time to time rescind such
designations;   provided,   however,   that,   unless  otherwise   specified  as
contemplated  by Section 301 with respect to the  Securities of such series,  no
such  designation  or rescission  shall in any manner relieve the Company of its
obligation  to maintain  an office or agency for such  purposes in each Place of
Payment for such Securities in accordance with the requirements set forth above.
The Company shall give prompt written  notice to the Trustee,  and prompt notice
to the Holders in the manner  specified in Section 106, of any such  designation
or  rescission  and of any change in the  location  of any such other  office or
agency.

               Anything  herein to the contrary  notwithstanding,  any office or
agency  required by this Section may be  maintained at an office of the Company,
in which event the Company  shall  perform all functions to be performed at such
office or agency.

SECTION 603.  Money for Securities Payments to Be Held in Trust.

               If the Company shall at any time act as its own Paying Agent with
respect to the Securities of any series, it shall, on or before each due date of
the  principal of and  premium,  if any,  and  interest,  if any, on any of such
Securities,  segregate and hold in trust for the benefit of the Persons entitled
thereto a sum  sufficient  to pay the  principal  and  premium  or  interest  so
becoming due until such sums shall be paid to such Persons or otherwise disposed
of as herein  provided.  The Company  shall  promptly  notify the Trustee of any
failure by the Company  (or any other  obligor on such  Securities)  to make any
payment of  principal  of or  premium,  if any,  or  interest,  if any,  on such
Securities.

               Whenever the Company shall have one or more Paying Agents for the
Securities of any series,  it shall, on or before each due date of the principal
of and premium, if any, and interest,  if any, on such Securities,  deposit with
such Paying Agents sums  sufficient  (without  duplication) to pay the principal
and premium or interest  so becoming  due,  such sum to be held in trust for the
benefit of the Persons  entitled to such  principal,  premium or  interest,  and
(unless such Paying Agent is the Trustee) the Company shall promptly  notify the
Trustee of any failure by it so to act.

               The Company  shall cause each Paying Agent for the  Securities of
any series, other than the Company or the Trustee, to execute and deliver to the
Trustee an  instrument  in which such Paying Agent shall agree with the Trustee,
subject to the provisions of this Section, that such Paying Agent shall:

               (a) hold all sums held by it for the payment of the  principal of
      and premium, if any, or interest,  if any, on such Securities in trust for
      the benefit of the Persons  entitled thereto until such sums shall be paid
      to such Persons or otherwise disposed of as herein provided;


                                       -31-

               (b) give the Trustee notice of any failure by the Company (or any
      other obligor upon such Securities) to make any payment of principal of or
      premium, if any, or interest, if any, on such Securities; and

               (c) at any time during the continuance of any such default,  upon
      the written request of the Trustee,  forthwith pay to the Trustee all sums
      so held in trust by such  Paying  Agent and  furnish to the  Trustee  such
      information  as it  possesses  regarding  the names and  addresses  of the
      Persons entitled to such sums.

               The Company may at any time pay, or by Company  Order  direct any
Paying  Agent to pay,  to the  Trustee  all sums held in trust by the Company or
such Paying  Agent,  such sums to be held by the Trustee upon the same trusts as
those upon which such sums were held by the Company or such Paying Agent and, if
so stated in a Company Order  delivered to the Trustee,  in accordance  with the
provisions of Article  Seven;  and, upon such payment by any Paying Agent to the
Trustee,  such Paying Agent shall be released  from all further  liability  with
respect to such money.

               Any money deposited with the Trustee or any Paying Agent, or then
held by the Company,  in trust for the payment of the  principal of and premium,
if any, or interest,  if any, on any Security and  remaining  unclaimed  for two
years after such  principal and premium,  if any, or interest has become due and
payable shall be paid to the Company on Company Request, or, if then held by the
Company,  shall be  discharged  from  such  trust;  and,  upon such  payment  or
discharge,  the Holder of such Security shall, as an unsecured  general creditor
and not as a Holder of an  Outstanding  Security,  look only to the  Company for
payment of the amount so due and payable and remaining unpaid, and all liability
of the Trustee or such Paying Agent with  respect to such trust  money,  and all
liability of the Company as trustee thereof,  shall thereupon  cease;  provided,
however,  that the Trustee or such Paying Agent,  before being  required to make
any such payment to the Company,  may at the expense of the Company  cause to be
mailed,  on one  occasion  only,  notice to such Holder that such money  remains
unclaimed and that, after a date specified therein, which shall not be less than
30 days from the date of such mailing,  any unclaimed balance of such money then
remaining will be paid to the Company.

SECTION 604.  Corporate Existence.

               Subject to the rights of the Company  under Article  Eleven,  the
Company  shall do or cause to be done all things  necessary to preserve and keep
in full force and effect its corporate existence.

SECTION 605.  Maintenance of Properties.

               The Company  shall cause (or,  with respect to property  owned in
common with others,  make reasonable effort to cause) all its properties used or
useful  in the  conduct  of its  business  to be  maintained  and  kept  in good
condition,  repair  and  working  order and shall  cause  (or,  with  respect to
property owned in common with others, make reasonable effort to


                                       -32-

cause) to be made all necessary repairs, renewals, replacements, betterments and
improvements  thereof,  all as, in the judgment of the Company, may be necessary
so  that  the  business  carried  on in  connection  therewith  may be  properly
conducted;  provided,  however,  that nothing in this Section  shall prevent the
Company from discontinuing,  or causing the discontinuance of, the operation and
maintenance of any of its properties if such  discontinuance is, in the judgment
of the Company, desirable in the conduct of its business.

SECTION 606.  Annual Officer's Certificate as to Compliance.

               Not later than  September 15 in each year,  commencing  September
15, 1996,  the Company  shall  deliver to the Trustee an  Officer's  Certificate
which need not comply with  Section  102,  executed by the  principal  executive
officer,  the principal financial officer or the principal accounting officer of
the Company, as to such officer's knowledge of the Company's compliance with all
conditions and covenants under this Indenture,  such compliance to be determined
without  regard to any  period of grace or  requirement  of  notice  under  this
Indenture.

SECTION 607.  Waiver of Certain Covenants.

               The  Company may omit in any  particular  instance to comply with
any term,  provision or condition set forth in (a) Section 602 or any additional
covenant or restriction  specified with respect to the Securities of any series,
as  contemplated  by Section  301,  if before the time for such  compliance  the
Holders of at least a majority in aggregate  principal amount of the Outstanding
Securities  of all series with respect to which  compliance  with Section 602 or
such  additional  covenant or  restriction  is to be omitted,  considered as one
class,  shall,  by Act of such  Holders,  either waive such  compliance  in such
instance or generally waive  compliance  with such term,  provision or condition
and (b)  Section  604,  605 or  Article  Eleven  if  before  the  time  for such
compliance the Holders of at least a majority in principal  amount of Securities
Outstanding  under this Indenture  shall,  by Act of such Holders,  either waive
such compliance in such instance or generally  waive  compliance with such term,
provision  or  condition;  but, in the case of (a) or (b), no such waiver  shall
extend to or affect such term,  provision or  condition  except to the extent so
expressly waived, and, until such waiver shall become effective, the obligations
of the  Company  and the  duties of the  Trustee  in  respect  of any such term,
provision or condition shall remain in full force and effect; provided, however,
so long as a Trust  holds  Securities  of any  series,  such Trust may not waive
compliance  or waive any default in  compliance by the Company with any covenant
or other term  contained  in this  Indenture  or the  Securities  of such series
without  the  approval  of the  holders  of at  least a  majority  in  aggregate
liquidation  preference of the outstanding  Preferred  Securities issued by such
Trust affected,  obtained as provided in the Trust Agreement  pertaining to such
Trust.

SECTION 608.  Restriction on Payment of Dividends.

               So  long  as  any  Preferred  Securities  of  any  series  remain
outstanding,  the Company  shall not declare or pay any  dividend on, or redeem,
purchase, acquire or make a


                                       -33-

liquidation payment with respect to, any of the Company's capital stock, or make
any guarantee  payments with respect to the foregoing (other than payments under
the Guarantee  relating to such  Preferred  Securities)  if at such time (a) the
Company  shall be in default  with  respect to its payment or other  obligations
under the Guarantee relating to such Preferred Securities,  (b) there shall have
occurred and be continuing a payment default (whether before or after expiration
of any  period of grace) or an Event of  Default  hereunder  or (c) the  Company
shall have elected to extend any interest  payment period as provided in Section
311, and any such period, or any extension thereof, shall be continuing.

SECTION 609.  Maintenance of Trust Existence.

               So long as Preferred Securities of any series remain outstanding,
the Company shall (i) maintain direct or indirect  ownership of all interests in
the Trust which  issued such  Preferred  Securities,  other than such  Preferred
Securities,  (ii) not  voluntarily  (to the extent  permitted by law)  dissolve,
liquidate or wind up such Trust, except in connection with a distribution of the
Securities to the holders of the Preferred  Securities  in  liquidation  of such
Trust,   (iii)  remain  the  sole  Depositor  under  the  Trust  Agreement  (the
"Depositor")  of such Trust and timely  perform in all material  respects all of
its duties as Depositor of such Trust, and (iv) use reasonable  efforts to cause
such Trust to remain a business trust and otherwise  continue to be treated as a
grantor  trust for  Federal  income tax  purposes  provided  that any  permitted
successor  to the Company  under this  Indenture  may  succeed to the  Company's
duties as  Depositor of such Trust;  and  provided  further that the Company may
permit such Trust to consolidate or merge with or into another business trust or
other permitted successor under the Trust Agreement  pertaining to such Trust so
long as the Company  agrees to comply with this Section 609 with respect to such
successor business trust or other permitted successor.

SECTION 610.  Rights of Holders of Preferred Securities.

               The Company agrees that, for so long as any Preferred  Securities
remain  outstanding,  its obligations  under this Indenture will also be for the
benefit  of the  holders  from  time to time of  Preferred  Securities,  and the
Company  acknowledges  and agrees that if the Property  Trustee fails to enforce
its rights with respect to the  Securities  or the related  Trust  Agreement,  a
holder of Preferred Securities may institute a legal proceeding directly against
the  Company  to enforce  the  Property  Trustee's  rights  with  respect to the
Securities  or such Trust  Agreement,  to the fullest  extent  permitted by law,
without first  instituting any legal proceeding  against the Property Trustee or
any other person or entity.

                                       -34-

                                  ARTICLE SEVEN

                           Satisfaction and Discharge

SECTION 701.  Defeasance.

               Any  Security  or  Securities,  or any  portion of the  principal
amount  thereof,  shall be deemed to have  been  paid for all  purposes  of this
Indenture,  and the entire  indebtedness of the Company in respect thereof shall
be  deemed to have been  satisfied  and  discharged,  if there  shall  have been
irrevocably  deposited  with the  Trustee or any Paying  Agent  (other  than the
Company), in trust:

               (a) money in an amount which shall be sufficient, or

               (b) in the case of a deposit  made prior to the  Maturity of such
      Securities or portions thereof,  Government  Obligations,  which shall not
      contain  provisions  permitting the redemption or other prepayment thereof
      at the option of the issuer thereof,  the principal of and the interest on
      which when due, without any regard to reinvestment  thereof,  will provide
      moneys which,  together with the money, if any,  deposited with or held by
      the Trustee or such Paying Agent, shall be sufficient, or

               (c) a combination of (a) or (b) which shall be sufficient,

to pay when due the principal of and premium, if any, and interest,  if any, due
and to  become  due on such  Securities  or  portions  thereof  on or  prior  to
Maturity;  provided,  however,  that in the case of the provision for payment or
redemption  of less than all the  Securities of any series,  such  Securities or
portions thereof shall have been selected by the Trustee as provided herein and,
in the case of a  redemption,  the  notice  requisite  to the  validity  of such
redemption shall have been given or irrevocable  authority shall have been given
by  the  Company  to  the  Trustee  to  give  such  notice,  under  arrangements
satisfactory to the Trustee; and provided,  further, that the Company shall have
delivered to the Trustee and such Paying Agent:

                     (x) if such  deposit  shall  have  been  made  prior to the
                  Maturity of such Securities,  a Company Order stating that the
                  money and Government  Obligations deposited in accordance with
                  this  Section  shall be held in trust,  as provided in Section
                  703; and

                     (y) if Government Obligations shall have been deposited, an
                  Opinion  of  Counsel   that  the   obligations   so  deposited
                  constitute   Government   Obligations   and  do  not   contain
                  provisions  permitting the  redemption or other  prepayment at
                  the  option  of  the  issuer  thereof,  and an  opinion  of an
                  independent   public   accountant  of  nationally   recognized
                  standing,  selected  by the  Company,  to the effect  that the
                  requirements   set  forth  in  clause   (b)  above  have  been
                  satisfied; and


                                       -35-

                     (z) if such  deposit  shall  have  been  made  prior to the
                  Maturity of such Securities,  an Officer's Certificate stating
                  the Company's  intention that, upon delivery of such Officer's
                  Certificate, its indebtedness in respect of such Securities or
                  portions  thereof will have been  satisfied and  discharged as
                  contemplated in this Section.

               Upon the deposit of money or Government Obligations,  or both, in
accordance  with this Section,  together with the documents  required by clauses
(x), (y) and (z) above,  the Trustee shall,  upon receipt of a Company  Request,
acknowledge in writing that the Security or Securities or portions  thereof with
respect  to which  such  deposit  was made are  deemed to have been paid for all
purposes of this  Indenture and that the entire  indebtedness  of the Company in
respect  thereof has been  satisfied  and  discharged  as  contemplated  in this
Section.  In the event  that all of the  conditions  set forth in the  preceding
paragraph  shall have been  satisfied in respect of any  Securities  or portions
thereof  except that,  for any reason,  the Officer's  Certificate  specified in
clause (z) shall not have been delivered,  such  Securities or portions  thereof
shall  nevertheless  be  deemed  to have  been  paid  for all  purposes  of this
Indenture,  and the  Holders  of  such  Securities  or  portions  thereof  shall
nevertheless  be no longer  entitled to the benefits of this Indenture or of any
of the  covenants  of the  Company  under  Article  Six  (except  the  covenants
contained  in Sections  602 and 603) or any other  covenants  made in respect of
such  Securities  or portions  thereof as  contemplated  by Section 301, but the
indebtedness  of the Company in respect of such  Securities or portions  thereof
shall not be deemed to have been satisfied and discharged  prior to Maturity for
any other purpose,  and the Holders of such Securities or portions thereof shall
continue to be  entitled to look to the Company for payment of the  indebtedness
represented thereby; and, upon Company Request, the Trustee shall acknowledge in
writing that such  Securities  or portions  thereof are deemed to have been paid
for all purposes of this Indenture.

               If payment at Stated  Maturity of less than all of the Securities
of any series is to be provided  for in the manner and with the effect  provided
in this  Section,  the  Security  Registrar  shall  select such  Securities,  or
portions of principal amount thereof, in the manner specified by Section 403 for
selection for redemption of less than all the Securities of a series.

               In the event that  Securities  which shall be deemed to have been
paid for  purposes of this  Indenture,  and, if such is the case,  in respect of
which the Company's  indebtedness shall have been satisfied and discharged,  all
as provided in this Section do not mature and are not to be redeemed  within the
60 day period  commencing  with the date of the deposit of moneys or  Government
Obligations, as aforesaid, the Company shall, as promptly as practicable, give a
notice,  in the same  manner  as a notice of  redemption  with  respect  to such
Securities,  to the Holders of such  Securities  to the effect that such deposit
has been made and the effect thereof.

               Notwithstanding  that any Securities shall be deemed to have been
paid for  purposes of this  Indenture,  as  aforesaid,  the  obligations  of the
Company and the Trustee in respect of such  Securities  under Sections 304, 305,
306,  404,  503 (as to notice of  redemption),  602,  603,  907 and 915 and this
Article Seven shall survive.


                                       -36-

               The Company  shall pay,  and shall  indemnify  the Trustee or any
Paying  Agent with which  Government  Obligations  shall have been  deposited as
provided in this Section  against,  any tax,  fee or other charge  imposed on or
assessed  against  such  Government  Obligations  or the  principal  or interest
received in respect of such Government Obligations,  including,  but not limited
to, any such tax payable by any entity  deemed,  for tax purposes,  to have been
created as a result of such deposit.

               Anything herein to the contrary  notwithstanding,  (a) if, at any
time after a  Security  would be deemed to have been paid for  purposes  of this
Indenture,  and,  if such is the case,  the  Company's  indebtedness  in respect
thereof would be deemed to have been satisfied or  discharged,  pursuant to this
Section (without regard to the provisions of this paragraph), the Trustee or any
Paying  Agent,  as the case may be,  shall be  required  to return  the money or
Government Obligations,  or combination thereof,  deposited with it as aforesaid
to the  Company  or its  representative  under any  applicable  Federal or State
bankruptcy,  insolvency or other similar law, such Security  shall  thereupon be
deemed retroactively not to have been paid and any satisfaction and discharge of
the Company's  indebtedness in respect thereof shall retroactively be deemed not
to have been effected,  and such Security shall be deemed to remain  Outstanding
and (b) any satisfaction and discharge of the Company's  indebtedness in respect
of any  Security  shall be subject to the  provisions  of the last  paragraph of
Section 603.

SECTION 702.  Satisfaction and Discharge of Indenture.

               This Indenture  shall upon Company Request cease to be of further
effect  (except as  hereinafter  expressly  provided),  and the Trustee,  at the
expense  of  the  Company,   shall  execute  proper  instruments   acknowledging
satisfaction and discharge of this Indenture, when

               (a) no Securities remain Outstanding hereunder; and

               (b) the  Company  has paid or caused  to be paid all  other  sums
      payable hereunder by the Company;

provided,  however,  that if, in accordance  with the last  paragraph of Section
701,  any  Security,  previously  deemed to have been paid for  purposes of this
Indenture,  shall  be  deemed  retroactively  not to  have  been so  paid,  this
Indenture shall thereupon be deemed retroactively not to have been satisfied and
discharged,  as  aforesaid,  and to remain in full  force  and  effect,  and the
Company  shall  execute  and  deliver  such  instruments  as the  Trustee  shall
reasonably request to evidence and acknowledge the same.

               Notwithstanding  the satisfaction and discharge of this Indenture
as aforesaid, the obligations of the Company and the Trustee under Sections 304,
305, 306, 404, 503 (as to notice of redemption),  602, 603, 907 and 915 and this
Article Seven shall survive.


                                       -37-

               Upon  satisfaction and discharge of this Indenture as provided in
this Section,  the Trustee shall assign,  transfer and turn over to the Company,
subject to the lien provided by Section 907, any and all money,  securities  and
other  property  then held by the  Trustee for the benefit of the Holders of the
Securities  other  than money and  Government  Obligations  held by the  Trustee
pursuant to Section 703.

SECTION 703.  Application of Trust Money.

               Neither  the  Government  Obligations  nor  the  money  deposited
pursuant to Section  701,  nor the  principal  or interest  payments on any such
Government  Obligations,  shall be withdrawn or used for any purpose other than,
and shall be held in trust for, the payment of the principal of and premium,  if
any, and interest,  if any, on the  Securities  or portions of principal  amount
thereof in respect of which such deposit was made, all subject,  however, to the
provisions of Section 603; provided,  however,  that, so long as there shall not
have  occurred and be continuing an Event of Default any cash received from such
principal  or interest  payments  on such  Government  Obligations,  if not then
needed for such  purpose,  shall,  to the extent  practicable,  be  invested  in
Government  Obligations  of the  type  described  in  clause  (b)  in the  first
paragraph  of Section 701 maturing at such times and in such amounts as shall be
sufficient to pay when due the  principal of and premium,  if any, and interest,
if any,  due and to become due on such  Securities  or  portions  thereof on and
prior to the Maturity thereof,  and interest earned from such reinvestment shall
be paid over to the Company as  received,  free and clear of any trust,  lien or
pledge  under this  Indenture  except the lien  provided  by  Section  907;  and
provided,  further,  that,  so long as  there  shall  not have  occurred  and be
continuing an Event of Default,  any moneys held in accordance with this Section
on the Maturity of all such  Securities in excess of the amount  required to pay
the  principal of and premium,  if any, and  interest,  if any, then due on such
Securities  shall be paid over to the Company free and clear of any trust,  lien
or pledge  under this  Indenture  except the lien  provided by Section  907; and
provided,  further,  that if an Event of  Default  shall  have  occurred  and be
continuing, moneys to be paid over to the Company pursuant to this Section shall
be held until such Event of Default shall have been waived or cured.


                                  ARTICLE EIGHT

                           Events of Default; Remedies

SECTION 801.  Events of Default.

               "Event  of  Default",   wherever  used  herein  with  respect  to
Securities of any series, means any one of the following events:

               (a) failure to pay interest,  if any,  including  any  Additional
      Interest,  on any  Security of such  series  within 30 days after the same
      becomes due and  payable  (whether  or not  payment is  prohibited  by the
      provisions of Article Fifteen  hereof);  provided,  however,  that a valid
      extension of the interest payment period by the


                                       -38-

       Company as contemplated in Section 311 of this  Indenture  shall  not  
       constitute  a  failure  to pay interest for this purpose; or

               (b) failure to pay the  principal  of or premium,  if any, on any
      Security  of such  series  at its  Maturity  (whether  or not  payment  is
      prohibited by the provisions of Article Fifteen hereof); or

               (c)  failure to perform or breach of any  covenant or warranty of
      the Company in this Indenture (other than a covenant or warranty a default
      in the  performance  of which or  breach  of  which is  elsewhere  in this
      Section  specifically  dealt with or which has expressly  been included in
      this Indenture  solely for the benefit of one or more series of Securities
      other  than  such  series)  for a period of 60 days  after  there has been
      given, by registered or certified mail, to the Company by the Trustee,  or
      to the Company and the Trustee by the Holders of at least 33% in principal
      amount of the  Outstanding  Securities  of such series,  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,  unless the
      Trustee,  or  the  Trustee  and  the  Holders  of a  principal  amount  of
      Securities of such series not less than the principal amount of Securities
      the Holders of which gave such notice,  as the case may be, shall agree in
      writing to an extension of such period prior to its expiration;  provided,
      however,  that  the  Trustee,  or the  Trustee  and  the  Holders  of such
      principal  amount of Securities of such series,  as the case may be, shall
      be deemed to have  agreed to an  extension  of such  period if  corrective
      action  is  initiated  by the  Company  within  such  period  and is being
      diligently pursued; or

               (d) the entry by a court having  jurisdiction  in the premises of
      (1) a  decree  or  order  for  relief  in  respect  of the  Company  in an
      involuntary  case or  proceeding  under any  applicable  Federal  or State
      bankruptcy,  insolvency,  reorganization  or  other  similar  law or (2) a
      decree  or order  adjudging  the  Company  a  bankrupt  or  insolvent,  or
      approving as properly  filed a petition by one or more Persons  other than
      the Company seeking reorganization, arrangement, adjustment or composition
      of or in respect of the Company under any applicable Federal or State law,
      or  appointing  a  custodian,  receiver,  liquidator,  assignee,  trustee,
      sequestrator  or  other  similar  official  for  the  Company  or for  any
      substantial  part  of  its  property,   or  ordering  the  winding  up  or
      liquidation of its affairs, and any such decree or order for relief or any
      such other decree or order shall have remained  unstayed and in effect for
      a period of 90 consecutive days; or

               (e)  the  commencement  by the  Company  of a  voluntary  case or
      proceeding under any applicable  Federal or State bankruptcy,  insolvency,
      reorganization  or other similar law or of any other case or proceeding to
      be adjudicated a bankrupt or insolvent,  or the consent by it to the entry
      of a decree or order for  relief in  respect  of the  Company in a case or
      proceeding under any applicable  Federal or State bankruptcy,  insolvency,
      reorganization or other similar law or to the commencement


                                       -39-


      of any  bankruptcy  or insolvency  case or  proceeding  against it, or the
      filing by it of a petition or answer or consent seeking  reorganization or
      relief under any applicable  Federal or State law, or the consent by it to
      the filing of such petition or to the appointment of or taking  possession
      by a custodian, receiver,  liquidator,  assignee, trustee, sequestrator or
      similar  official  of  the  Company  or of  any  substantial  part  of its
      property,  or  the  making  by it of an  assignment  for  the  benefit  of
      creditors,  or the  admission by it in writing of its inability to pay its
      debts generally as they become due, or the authorization of such action by
      the Board of Directors; or

               (f)  any  other  Event  of  Default  specified  with  respect  to
      Securities of such series.

SECTION 802.  Acceleration of Maturity; Rescission and Annulment.

               If an Event of Default due to the default in payment of principal
of, or  interest  on,  any  series of  Securities  or due to the  default in the
performance  or  breach  of any  other  covenant  or  warranty  of  the  Company
applicable  to  the  Securities  of  such  series  but  not  applicable  to  all
outstanding Securities shall have occurred and be continuing, either the Trustee
or the Holders of not less than 33% in  principal  amount of the  Securities  of
such series may then declare the principal of all  Securities of such series and
interest  accrued thereon to be due and payable  immediately  (provided that the
payment of principal and interest on such Securities  shall remain  subordinated
to the extent provided in Article Fifteen hereof). If an Event of Default due to
default in the  performance  of any other of the covenants or agreements  herein
applicable to all  Outstanding  Securities  or an Event of Default  specified in
Section 801(d) or (e) shall have occurred and be continuing,  either the Trustee
or the Holders of not less than 33% in principal  amount of all Securities  then
Outstanding  (considered as one class), and not the Holders of the Securities of
any one of such series, may declare the principal of all Securities and interest
accrued thereon to be due and payable immediately  (provided that the payment of
principal  and  interest on such  Securities  shall remain  subordinated  to the
extent provided in the Indenture).

               At any time after such a declaration of acceleration with respect
to Securities of any series shall have been made and before a judgment or decree
for  payment  of the money  due  shall  have been  obtained  by the  Trustee  as
hereinafter in this Article provided, the Event or Events of Default giving rise
to such  declaration of  acceleration  shall,  without further act, be deemed to
have been waived,  and such  declaration  and its  consequences  shall,  without
further act, be deemed to have been rescinded and annulled, if

               (a) the Company  shall have paid or deposited  with the Trustee a
      sum sufficient to pay

                     (1) all overdue interest on all Securities of such series;

                     (2) the principal of and premium, if any, on any Securities
                  of such series  which have become due  otherwise  than by such
                  declaration of


                                       -40- 

                   acceleration  and interest thereon at the rate or rates 
                   prescribed  therefor in such Securities;

                     (3) to the extent that payment of such  interest is lawful,
                  interest upon overdue  interest,  if any, at the rate or rates
                  prescribed therefor in such Securities;

                     (4) all amounts due to the Trustee under Section 907;

               and

               (b) any  other  Event  or  Events  of  Default  with  respect  to
      Securities of such series,  other than the  nonpayment of the principal of
      Securities  of such  series  which  shall  have  become due solely by such
      declaration of  acceleration,  shall have been cured or waived as provided
      in Section 813.

No such  rescission  shall affect any subsequent  Event of Default or impair any
right consequent thereon.

SECTION 803.  Collection of Indebtedness and Suits for Enforcement by 
              Trustee.

               If an Event of Default  described in clause (a) or (b) of Section
801 shall have occurred and be continuing, the Company shall, upon demand of the
Trustee,  pay to it, for the  benefit of the  Holders of the  Securities  of the
series  with  respect to which such Event of Default  shall have  occurred,  the
whole amount then due and payable on such  Securities for principal and premium,
if any, and interest,  if any, and, to the extent permitted by law,  interest on
premium, if any, and on any overdue principal and interest, at the rate or rates
prescribed therefor in such Securities,  and, in addition thereto,  such further
amount as shall be  sufficient  to cover any amounts  due to the  Trustee  under
Section 907.

               If the Company shall fail to pay such amounts forthwith upon such
demand,  the Trustee,  in its own name and as trustee of an express  trust,  may
institute  a  judicial  proceeding  for the  collection  of the  sums so due and
unpaid,  may  prosecute  such  proceeding  to judgment  or final  decree and may
enforce the same against the Company or any other  obligor upon such  Securities
and collect the moneys  adjudged or decreed to be payable in the manner provided
by law out of the  property  of the  Company  or any  other  obligor  upon  such
Securities, wherever situated.

               If an Event of Default with respect to  Securities  of any series
shall have occurred and be continuing, the Trustee may in its discretion proceed
to protect and enforce its rights and the rights of the Holders of Securities of
such series by such appropriate  judicial  proceedings as the Trustee shall deem
most effectual to protect and enforce any such rights,  whether for the specific
enforcement  of any  covenant or  agreement  in this  Indenture or in aid of the
exercise of any power granted herein, or to enforce any other proper remedy.


                                       -41-

SECTION 804.  Trustee May File Proofs of Claim.

               In  case  of  the  pendency  of  any  receivership,   insolvency,
liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or
other judicial  proceeding relative to the Company or any other obligor upon the
Securities  or the  property  of the  Company or of such other  obligor or their
creditors,  the Trustee (irrespective of whether the principal of the 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 on
the Company for the payment of overdue  principal or interest) shall be entitled
and empowered, by intervention in such proceeding or otherwise,

               (a) to file and prove a claim for the whole amount of  principal,
      premium, if any, and interest,  if any, owing and unpaid in respect of the
      Securities  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 amounts due to the Trustee under Section 907) and of the Holders
      allowed in such judicial proceeding, and

               (b) to collect and receive any moneys or other  property  payable
      or deliverable on any such claims and to distribute the same;

and any custodian,  receiver,  assignee,  trustee,  liquidator,  sequestrator or
other similar official in any such judicial  proceeding is hereby  authorized by
each  Holder to make such  payments  to the  Trustee  and, in the event that the
Trustee shall consent to the making of such payments directly to the Holders, to
pay to the Trustee any amounts due it under Section 907.

               Nothing herein contained shall be deemed to authorize the Trustee
to  authorize  or consent to or accept or adopt on behalf of any Holder any plan
of  reorganization,   arrangement,   adjustment  or  composition  affecting  the
Securities  or the rights of any Holder  thereof or to authorize  the Trustee to
vote in respect of the claim of any Holder in any such proceeding.

SECTION 805.  Trustee May Enforce Claims Without Possession of Securities.

               All  rights of action  and claims  under  this  Indenture  or the
Securities may be prosecuted and enforced by the Trustee  without the possession
of any of the  Securities or the production  thereof in any proceeding  relating
thereto,  and any such proceeding  instituted by the Trustee shall be brought in
its own name as trustee of an express trust, and any recovery of judgment shall,
after  provision  for the  payment  of the  reasonable  compensation,  expenses,
disbursements  and advances of the Trustee,  its agents and counsel,  be for the
ratable  benefit of the  Holders in  respect  of which  such  judgment  has been
recovered.


                                       -42-

SECTION 806.  Application of Money Collected.

               Subject to the provisions of Article Fifteen, any money collected
by the Trustee pursuant to this Article shall be applied in the following order,
at the date or dates fixed by the Trustee  and, in case of the  distribution  of
such money on account of principal or premium, if any, or interest, if any, upon
presentation  of the  Securities in respect of which or for the benefit of which
such money shall have been collected and the notation  thereon of the payment if
only partially paid and upon surrender thereof if fully paid:

               First:  To the  payment  of all  amounts  due the  Trustee  under
Section 907;

               Second:  To the payment of the  amounts  then due and unpaid upon
the  Securities for principal of and premium,  if any, and interest,  if any, in
respect of which or for the  benefit  of which  such  money has been  collected,
ratably,  without  preference or priority of any kind,  according to the amounts
due and payable on such Securities for principal, premium, if any, and interest,
if any, respectively; and

               Third: To the payment of the remainder, if any, to the Company or
to  whomsoever  may be  lawfully  entitled  to receive the same or as a court of
competent jurisdiction may direct.

SECTION 807.  Limitation on Suits.

               No Holder  shall  have any  right to  institute  any  proceeding,
judicial or otherwise, with respect to this Indenture, or for the appointment of
a receiver or trustee, or for any other remedy hereunder, unless:

               (a) such Holder shall have previously given written notice to the
      Trustee of a continuing Event of Default with respect to the Securities of
      such series;

               (b)  the  Holders  of not  less  than  a  majority  in  aggregate
      principal amount of the Outstanding Securities of all series in respect of
      which  an  Event  of  Default  shall  have  occurred  and  be  continuing,
      considered as one class, shall have made written request to the Trustee to
      institute  proceedings in respect of such Event of Default in its own name
      as Trustee hereunder;

               (c) such  Holder or  Holders  shall have  offered to the  Trustee
      reasonable  indemnity  against the costs,  expenses and  liabilities to be
      incurred in compliance with such request;

               (d) the  Trustee  for 60 days after its  receipt of such  notice,
      request and offer of  indemnity  shall have failed to  institute  any such
      proceeding; and

               (e) no direction  inconsistent  with such written  request  shall
      have been given to the Trustee during such 60-day period by the Holders of
      a majority in aggregate

                                       -43-

      principal amount of the Outstanding Securities of all series in respect of
      which  an  Event  of  Default  shall  have  occurred  and  be  continuing,
      considered as one class;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever by virtue of, or by availing of, any provision
of this  Indenture to affect,  disturb or  prejudice  the rights of any other of
such Holders or to obtain or to seek to obtain  priority or preference  over any
other of such  Holders or to enforce any right under this  Indenture,  except in
the manner herein  provided and for the equal and ratable benefit of all of such
Holders.

SECTION 808.  Unconditional Right of Holders to Receive Principal,
              Premium and Interest.

               Notwithstanding any other provision in this Indenture, the Holder
of any Security shall have the right,  which is absolute and  unconditional,  to
receive payment of the principal of and premium, if any, and (subject to Section
307 and 311)  interest,  if any,  on such  Security  on the Stated  Maturity  or
Maturities  expressed in such  Security (or, in the case of  redemption,  on the
Redemption  Date) and to institute suit for the enforcement of any such payment,
and such rights shall not be impaired  without the consent of such  Holder.  Any
holder of related  Preferred  Securities  shall have the right to institute suit
for  the  enforcement  of any  such  payment  to such  holder  with  respect  to
Securities relating to such Preferred Securities having a principal amount equal
to  the  aggregate  liquidation  preference  amount  of  the  related  Preferred
Securities held by such holder.

SECTION 809.  Restoration of Rights and Remedies.

               If the Trustee or any Holder has  instituted  any  proceeding  to
enforce any right or remedy under this Indenture and such proceeding  shall have
been  discontinued  or abandoned for any reason,  or shall have been  determined
adversely to the Trustee or to such Holder, then and in every such case, subject
to any  determination  in such  proceeding,  the  Company,  and Trustee and such
Holder shall be restored  severally and  respectively to their former  positions
hereunder and  thereafter all rights and remedies of the Trustee and such Holder
shall continue as though no such proceeding had been instituted.

SECTION 810.  Rights and Remedies Cumulative.

               Except as  otherwise  provided in the last  paragraph  of Section
306, no right or remedy herein  conferred  upon or reserved to the Trustee or to
the Holders 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.


                                       -44-

SECTION 811.  Delay or Omission Not Waiver.

               No delay or  omission of the Trustee or of any Holder to exercise
any right or remedy  accruing  upon any Event of Default  shall  impair any such
right or  remedy  or  constitute  a waiver of any such  Event of  Default  or an
acquiescence therein.  Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised  from time to time,  and as often
as may be deemed  expedient,  by the Trustee or by the Holders,  as the case may
be.

SECTION 812.  Control by Holders of Securities.

               If an Event of Default  shall have  occurred and be continuing in
respect of a series of Securities, the Holders of a majority in principal amount
of the Outstanding  Securities of such series 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; provided, however, that if an Event of
Default  shall have  occurred  and be  continuing  with respect to more than one
series of Securities, the Holders of a majority in aggregate principal amount of
the Outstanding  Securities of all such series,  considered as one class,  shall
have the right to make such direction,  and not the Holders of the Securities of
any one of such series; and provided,  further, that such direction shall not be
in conflict with any rule of law or with this  Indenture.  Before  proceeding to
exercise any right or power  hereunder at the  direction  of such  Holders,  the
Trustee  shall be entitled to receive from such Holders  reasonable  security or
indemnity against the costs, expenses and liabilities which might be incurred by
it in compliance with any such direction.

SECTION 813.  Waiver of Past Defaults.

               The  Holders of not less than a majority in  principal  amount of
the Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past default  hereunder with respect to such
series and its consequences, except a default

               (a) in the payment of the  principal  of or  premium,  if any, or
      interest, if any, on any Security of such series, or

               (b) in respect of a covenant  or  provision  hereof  which  under
      Section  1202  cannot be  modified  or amended  without the consent of the
      Holder of each Outstanding Security of such series affected;

provided,  however,  that so long as a Trust holds the Securities of any series,
such  Trust may not waive any past  default  without  the  consent of at least a
majority  in  aggregate  liquidation  preference  of the  outstanding  Preferred
Securities  issued by such Trust  affected,  obtained  as  provided in the Trust
Agreement pertaining to such Trust.


                                       -45-

               Upon any such waiver,  such default shall cease to exist, and any
and all Events of Default arising  therefrom shall be deemed to have been cured,
for every  purpose of this  Indenture;  but no such waiver  shall  extend to any
subsequent or other default or impair any right consequent thereon.

SECTION 814.  Undertaking for Costs.

               The  Company  and the  Trustee  agree,  and  each  Holder  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 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
Company,  to any suit  instituted by the Trustee,  to any suit instituted by any
Holder, or group of Holders, holding in the aggregate more than 10% in aggregate
principal amount of the Outstanding Securities of all series in respect of which
such suit may be brought,  considered as one class, or to any suit instituted by
any Holder for the enforcement of the payment of the principal of or premium, if
any, or  interest,  if any, on any  Security on or after the Stated  Maturity or
Maturities  expressed in such  Security  (or, in the case of  redemption,  on or
after the Redemption Date).

SECTION 815.  Waiver of Stay or Extension Laws.

               The Company  covenants (to the extent that it may lawfully do so)
that it will not at any time insist upon, or plead, or in any manner  whatsoever
claim or take the benefit or advantage  of, any stay or  extension  law wherever
enacted,  now or at any time hereafter in force,  which may affect the covenants
or the performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and  covenants  that it will not hinder,  delay or impede the  execution  of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                                  ARTICLE NINE

                                   The Trustee

SECTION 901.  Certain Duties and Responsibilities.

               (a) The  Trustee  shall have and be subject to all the duties and
      responsibilities  specified  with respect to an  indenture  trustee in the
      Trust Indenture Act and no implied  covenants or obligations shall be read
      into this Indenture against the Trustee.


                                       -46-

               (b) No provision of this  Indenture  shall require the Trustee to
      expend or risk its own funds or otherwise incur any financial liability in
      the performance of any of its duties hereunder,  or in the exercise of any
      of its rights or powers, if it shall have reasonable grounds for believing
      that  repayment of such funds or adequate  indemnity  against such risk or
      liability is not reasonably assured to it.

               (c)  Notwithstanding  anything contained in this Indenture to the
      contrary,  the  duties  and  responsibilities  of the  Trustee  under this
      Indenture  shall  be  subject  to  the   protections,   exculpations   and
      limitations  on liability  afforded to the Trustee under the provisions of
      the Trust Indenture Act.

               (d) Whether or not therein expressly so provided, every provision
      of this Indenture relating to the conduct or affecting the liability of or
      affording  protection to the Trustee shall be subject to the provisions of
      this Section.

SECTION 902.  Notice of Defaults.

               The  Trustee  shall give  notice of any  default  hereunder  with
respect to the  Securities  of any series to the Holders of  Securities  of such
series in the manner and to the extent  required to do so by the Trust Indenture
Act,  unless such default  shall have been cured or waived;  provided,  however,
that in the case of any default of the character specified in Section 801(c), no
such  notice  to  Holders  shall be given  until  at  least  45 days  after  the
occurrence  thereof.  For the purpose of this Section,  the term "default" means
any event which is, or after notice or lapse of time, or both, would become,  an
Event of Default.

SECTION 903.  Certain Rights of Trustee.

               Subject to the  provisions  of Section 901 and to the  applicable
provisions of the Trust Indenture Act:

               (a) the  Trustee  may rely and  shall be  protected  in acting or
      refraining  from  acting in good faith upon any  resolution,  certificate,
      statement,   instrument,  opinion,  report,  notice,  request,  direction,
      consent,  order, bond, debenture,  note, other evidence of indebtedness or
      other  paper or  document  reasonably  believed by it to be genuine and to
      have been signed or presented by the proper party or parties;

               (b) any  request or  direction  of the Company  mentioned  herein
      shall be sufficiently  evidenced by a Company Request or Company Order, or
      as otherwise expressly provided herein, and any resolution of the Board of
      Directors may be sufficiently evidenced by a Board Resolution;

               (c) whenever in the  administration of this Indenture the Trustee
      shall deem it desirable  that a matter be proved or  established  prior to
      taking,  suffering or omitting any action  hereunder,  the Trustee (unless
      other evidence be herein specifically


                                       -47-

      prescribed)  may,  in the  absence of bad faith on its part,  rely upon an
      Officer's Certificate;

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

               (e) the Trustee  shall be under no  obligation to exercise any of
      the  rights or powers  vested in it by this  Indenture  at the  request or
      direction  of any Holder  pursuant to this  Indenture,  unless such Holder
      shall have offered to the Trustee reasonable security or indemnity against
      the costs,  expenses  and  liabilities  which  might be  incurred by it in
      compliance with such request or direction;

               (f) 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, direction,  consent, order,
      bond,  debenture,  note,  other evidence of indebtedness or other paper or
      document,  but the  Trustee,  in its  discretion,  may make  such  further
      inquiry  or  investigation  into such  facts or matters as it may see fit,
      and,  if the  Trustee  shall  determine  to make such  further  inquiry or
      investigation,  it shall  (subject to applicable  legal  requirements)  be
      entitled to examine,  during normal business hours, the books, records and
      premises of the Company, personally or by agent or attorney;

               (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 and the Trustee shall not be  responsible  for any misconduct or
      negligence on the part of any agent or attorney appointed with due care by
      it hereunder; and

               (h) the  Trustee  shall  not be  charged  with  knowledge  of any
      default  or Event of  Default,  as the case may be,  with  respect  to the
      Securities  of any series for which it is acting as Trustee  unless either
      (1) a Responsible  Officer of the Trustee  shall have actual  knowledge of
      the default or Event of Default, as the case may be, or (2) written notice
      of such  default or Event of Default,  as the case may be, shall have been
      given to the Trustee by the Company,  any other obligor on such Securities
      or by any Holder of such Securities.

SECTION 904.  Not Responsible for Recitals or Issuance of Securities.

               The recitals  contained herein and in the Securities  (except the
Trustee's  certificates of  authentication)  shall be taken as the statements of
the  Company,  and  neither the Trustee  nor any  Authenticating  Agent  assumes
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Indenture or of the Securities.  Neither the
Trustee  nor  any  Authenticating  Agent  shall  be  accountable  for the use or
application by the Company of Securities or the proceeds thereof.


                                       -48-

SECTION 905.  May Hold Securities.

               Each of the Trustee, any Authenticating  Agent, any Paying Agent,
any Security  Registrar or any other agent of the Company,  in its individual or
any other capacity,  may become the owner or pledgee of Securities and,  subject
to Sections  908 and 913,  may  otherwise  deal with the  Company  with the same
rights it would have if it were not the Trustee,  Authenticating  Agent,  Paying
Agent, Security Registrar or such other agent.

SECTION 906. Money Held in Trust.

               Money  held  by  the  Trustee  in  trust  hereunder  need  not be
segregated  from other funds,  except to the extent required by law. The Trustee
shall be under no liability  for interest on any money  received by it hereunder
except as expressly  provided herein or otherwise  agreed with, and for the sole
benefit of, the Company.

SECTION 907.  Compensation and Reimbursement.

               The Company shall

               (a) pay to the Trustee from time to time reasonable  compensation
      for all services rendered by it hereunder (which compensation shall not be
      limited by any provision of law in regard to the compensation of a trustee
      of an express trust);

               (b) except as otherwise expressly provided herein,  reimburse the
      Trustee upon its request for all reasonable  expenses,  disbursements  and
      advances reasonably incurred or made by the Trustee in accordance with any
      provision of this Indenture (including the reasonable compensation and the
      expenses  and  disbursements  of its  agents and  counsel),  except to the
      extent that any such expense,  disbursement or advance may be attributable
      to the Trustee's negligence, wilful misconduct or bad faith; and

               (c)  indemnify  the Trustee  for,  and hold it harmless  from and
      against,  any loss, liability or expense reasonably incurred by it arising
      out of or in connection with the acceptance or administration of the trust
      or trusts hereunder or the performance of its duties hereunder,  including
      the reasonable costs and expenses of defending itself against any claim or
      liability in  connection  with the exercise or  performance  of any of its
      powers or duties hereunder,  except to the extent any such loss, liability
      or expense may be attributable to its negligence, wilful misconduct or bad
      faith.

               As security for the performance of the obligations of the Company
under this Section,  the Trustee shall have a lien prior to the Securities  upon
all  property  and funds  held or  collected  by the  Trustee as such other than
property and funds held in trust under Section 703 (except as otherwise provided
in Section  703).  "Trustee"  for  purposes of this  Section  shall  include any
predecessor Trustee; provided, however, that the negligence, wilful


                                       -49-

misconduct or bad faith of any Trustee  hereunder shall not affect the rights of
any other Trustee hereunder.

               In addition to the rights provided to the Trustee pursuant to the
provisions of the immediately  preceding paragraph of this Section 907, when the
Trustee  incurs  expenses  or renders  services in  connection  with an Event of
Default specified in Section 801(d) or Section 801(e),  the expenses  (including
the reasonable charges and expenses of its counsel) and the compensation for the
services  are  intended  to  constitute  expenses  of  administration  under any
applicable Federal or State bankruptcy, insolvency or other similar law.

SECTION 908.  Disqualification; Conflicting Interests.

               If the  Trustee  shall have or acquire any  conflicting  interest
within the meaning of the Trust  Indenture  Act, it shall either  eliminate such
conflicting interest or resign to the extent, in the manner and with the effect,
and  subject to the  conditions,  provided in the Trust  Indenture  Act and this
Indenture.  For purposes of Section  310(b)(1) of the Trust Indenture Act and to
the extent permitted thereby, the Trustee, in its capacity as trustee in respect
of the  Securities  of any  series,  shall not be  deemed to have a  conflicting
interest  arising from its capacity as trustee in respect of the  Securities  of
any other series. The Trust Agreement and the Guarantee Agreement  pertaining to
each Trust shall be deemed to be  specifically  described in this  Indenture for
the purposes of clause (i) of the first proviso  contained in Section  310(b) of
the Trust Indenture Act.

SECTION 909.  Corporate Trustee Required; Eligibility.

               There shall at all times be a Trustee hereunder which shall be

               (a) a corporation  organized and doing business under the laws of
      the United  States,  any State or  Territory  thereof or the  District  of
      Columbia,  authorized under such laws to exercise  corporate trust powers,
      having a combined capital and surplus of at least  $50,000,000 and subject
      to supervision or examination by Federal or State authority, or

               (b) if and to the extent  permitted  by the  Commission  by rule,
      regulation  or order  upon  application,  a  corporation  or other  Person
      organized  and doing  business  under  the laws of a  foreign  government,
      authorized  under such laws to exercise  corporate trust powers,  having a
      combined  capital  and  surplus  of at  least  $50,000,000  or the  Dollar
      equivalent of the applicable  foreign  currency and subject to supervision
      or  examination  by authority of such  foreign  government  or a political
      subdivision thereof substantially equivalent to supervision or examination
      applicable to United States institutional trustees,

and, in either case,  qualified  and  eligible  under this Article and the Trust
Indenture  Act. If such  corporation  publishes  reports of  condition  at least
annually,  pursuant  to  law or to  the  requirements  of  such  supervising  or
examining authority, then for the purposes of this Section,


                                       -50-  

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.  If at any  time  the  Trustee  shall  cease  to be  eligible  in
accordance with the provisions of this Section,  it shall resign  immediately in
the manner and with the effect hereinafter specified in this Article.

SECTION 910.  Resignation and Removal; Appointment of Successor.

               (a) No  resignation  or removal of the Trustee and no appointment
      of a successor  Trustee  pursuant to this Article  shall become  effective
      until the acceptance of appointment by the successor Trustee in accordance
      with the applicable requirements of Section 911.

               (b) The  Trustee  may  resign  at any time  with  respect  to the
      Securities of one or more series by giving  written  notice thereof to the
      Company.  If the instrument of acceptance by a successor  Trustee required
      by Section 911 shall not have been delivered to the Trustee within 30 days
      after the giving of such notice of resignation,  the resigning Trustee may
      petition  any court of competent  jurisdiction  for the  appointment  of a
      successor Trustee with respect to the Securities of such series.

               (c) The  Trustee  may be removed at any time with  respect to the
      Securities  of any series by Act of the Holders of a majority in principal
      amount of the  Outstanding  Securities  of such  series  delivered  to the
      Trustee  and to the  Company;  provided  that  so  long  as any  Preferred
      Securities  remain  outstanding,  the Trust which  issued  such  Preferred
      Securities  shall not execute  any Act to remove the  Trustee  without the
      consent of the holders of a majority in aggregate  liquidation  preference
      of  Preferred  Securities  issued by such Trust  outstanding,  obtained as
      provided in the Trust Agreement pertaining to such Trust.

               (d) If at any time:

                     (1) the Trustee shall fail to comply with Section 908 after
                  written  request  therefor by the Company or by any Holder who
                  has been a bona fide Holder for at least six months, or

                     (2) the Trustee  shall cease to be eligible  under  Section
                  909 and shall fail to resign after written request therefor by
                  the Company or by any such Holder, or

                     (3) the Trustee  shall become  incapable of acting or shall
                  be  adjudged  a bankrupt  or  insolvent  or a receiver  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  or  affairs  for  the  purpose  of   rehabilitation,
                  conservation or liquidation,

then,  in any such case,  (x) the Company by a Board  Resolution  may remove the
Trustee with respect to all Securities or (y) subject to Section 814, any Holder
who has been a bona fide


                                       -51-

Holder  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 with respect to all Securities and the appointment of a successor
Trustee or Trustees.

               (e) If the Trustee shall resign,  be removed or become  incapable
      of acting,  or if a vacancy  shall  occur in the office of Trustee for any
      cause (other than as  contemplated in clause (y) in subsection (d) of this
      Section),  with  respect  to the  Securities  of one or more  series,  the
      Company, by a Board Resolution, shall promptly appoint a successor Trustee
      or Trustees  with  respect to the  Securities  of that or those series (it
      being  understood  that any such  successor  Trustee may be appointed with
      respect to the Securities of one or more or all of such series and that at
      any time there shall be only one Trustee with respect to the Securities of
      any particular  series) and shall comply with the applicable  requirements
      of Section 911.  If,  within one year after such  resignation,  removal or
      incapability,  or the occurrence of such vacancy, a successor Trustee with
      respect to the  Securities  of any series shall be appointed by Act of the
      Holders of a majority in principal amount of the Outstanding Securities of
      such  series  delivered  to the  Company  and the  retiring  Trustee,  the
      successor  Trustee so appointed  shall,  forthwith  upon its acceptance of
      such appointment in accordance with the applicable requirements of Section
      911,  become the successor  Trustee with respect to the Securities of such
      series and to that extent supersede the successor Trustee appointed by the
      Company.  If no successor  Trustee with respect to the  Securities  of any
      series  shall have been so  appointed  by the  Company or the  Holders and
      accepted appointment in the manner required by Section 911, any Holder who
      has been a bona fide  Holder of a Security of such series for at least six
      months  may,  on behalf  of  itself  and all  others  similarly  situated,
      petition  any court of competent  jurisdiction  for the  appointment  of a
      successor Trustee with respect to the Securities of such series.

               (f) So long as no event  which  is,  or after  notice or lapse of
      time, or both,  would become,  an Event of Default shall have occurred and
      be  continuing,  and except with respect to a Trustee  appointed by Act of
      the  Holders  of  a  majority  in  principal  amount  of  the  Outstanding
      Securities  pursuant to  subsection  (e) of this  Section,  if the Company
      shall have  delivered to the Trustee (i) a Board  Resolution  appointing a
      successor Trustee,  effective as of a date specified therein,  and (ii) an
      instrument of acceptance of such  appointment,  effective as of such date,
      by such  successor  Trustee in  accordance  with  Section 911, the Trustee
      shall be deemed to have resigned as contemplated in subsection (b) of this
      Section,  the successor  Trustee shall be deemed to have been appointed by
      the  Company   pursuant  to  subsection  (e)  of  this  Section  and  such
      appointment  shall be deemed  to have been  accepted  as  contemplated  in
      Section 911, all as of such date, and all other provisions of this Section
      and Section 911 shall be applicable to such  resignation,  appointment and
      acceptance except to the extent inconsistent with this subsection (f).

               (g) The Company  shall give notice of each  resignation  and each
      removal of the Trustee  with respect to the  Securities  of any series and
      each appointment of a successor  Trustee with respect to the Securities of
      any series by mailing  written notice of such event by  first-class  mail,
      postage prepaid, to all Holders of Securities of such


                                       -52-

      series as their names and addresses appear in the Security Register.  Each
      notice shall include the name of the successor Trustee with respect to the
      Securities of such series and the address of its corporate trust office.

SECTION 911.  Acceptance of Appointment by Successor.

               (a) In case of the appointment  hereunder of a successor  Trustee
      with respect to the Securities of all series, every such successor Trustee
      so appointed shall execute,  acknowledge and deliver to the Company and to
      the  retiring  Trustee  an  instrument  accepting  such  appointment,  and
      thereupon the resignation or removal of the retiring  Trustee shall become
      effective  and such  successor  Trustee,  without any further act, deed or
      conveyance,  shall become vested with all the rights,  powers,  trusts and
      duties of the retiring Trustee;  but, on the request of the Company or the
      successor  Trustee,  such retiring Trustee shall, upon payment of all sums
      owed  to it,  execute  and  deliver  an  instrument  transferring  to such
      successor  Trustee  all the  rights,  powers  and  trusts of the  retiring
      Trustee and shall duly  assign,  transfer  and  deliver to such  successor
      Trustee all property and money held by such retiring Trustee hereunder.

               (b) In case of the appointment  hereunder of a successor  Trustee
      with respect to the  Securities  of one or more (but not all) series,  the
      Company,  the retiring Trustee and each successor  Trustee with respect to
      the  Securities  of one or  more  series  shall  execute  and  deliver  an
      indenture  supplemental hereto wherein each successor Trustee shall accept
      such  appointment  and which (1) shall contain such provisions as shall be
      necessary  or  desirable  to transfer and confirm to, and to vest in, each
      successor  Trustee  all the  rights,  powers,  trusts  and  duties  of the
      retiring Trustee with respect to the Securities of that or those series to
      which  the  appointment  of such  successor  Trustee  relates,  (2) if the
      retiring  Trustee is not retiring  with respect to all  Securities,  shall
      contain  such  provisions  as shall be deemed  necessary  or  desirable to
      confirm  that all the rights,  powers,  trusts and duties of the  retiring
      Trustee with respect to the Securities of that or those series as to which
      the retiring  Trustee is not retiring  shall  continue to be vested in the
      retiring  Trustee and (3) 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  co-trustees of the same trust and that each such
      Trustee shall be trustee of a trust or trusts hereunder separate and apart
      from any trust or trusts hereunder administered by any other such Trustee;
      and upon the  execution  and delivery of such  supplemental  indenture the
      resignation or removal of the retiring  Trustee shall become  effective to
      the extent provided therein and each such successor  Trustee,  without any
      further act, deed or conveyance,  shall become vested with all the rights,
      powers,  trusts and duties of the  retiring  Trustee  with  respect to the
      Securities  of that or those  series  to  which  the  appointment  of such
      successor Trustee relates; but, on request of the Company or any successor
      Trustee, such retiring Trustee, upon payment of all sums owed to it, shall
      duly assign,  transfer and deliver to such successor  Trustee all property
      and money held by such  retiring  Trustee  hereunder  with  respect to the
      Securities  of that or those  series  to  which  the  appointment  of such
      successor Trustee relates.


                                       -53-

               (c) Upon request of any such successor Trustee, the Company shall
      execute any instruments  which fully vest in and confirm to such successor
      Trustee all such rights,  powers and trusts  referred to in subsection (a)
      or (b) of this Section, as the case may be.

               (d) No successor  Trustee shall accept its appointment  unless at
      the time of such acceptance such successor  Trustee shall be qualified and
      eligible under this Article.

SECTION 912. Merger, Conversion, Consolidation or Succession to Business.

               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 all or  substantially  all the  corporate  trust
business  of the  Trustee,  shall be the  successor  of the  Trustee  hereunder,
provided such corporation  shall be otherwise  qualified and eligible under this
Article,  without the execution or filing of any paper or any further act on the
part of any of the  parties  hereto.  In case any  Securities  shall  have  been
authenticated,  but not delivered,  by the Trustee then in office, any successor
by merger,  conversion or consolidation to such authenticating Trustee may adopt
such  authentication  and deliver the Securities so authenticated  with the same
effect as if such successor Trustee had itself authenticated such Securities.

SECTION 913.  Preferential Collection of Claims Against Company.

               If the  Trustee  shall be or become a creditor  of the Company or
any other obligor upon the  Securities  (other than by reason of a  relationship
described in Section  311(b) of the Trust  Indenture  Act), the Trustee shall be
subject  to any  and  all  applicable  provisions  of the  Trust  Indenture  Act
regarding the  collection of claims  against the Company or such other  obligor.
For purposes of Section 311(b) of the Trust Indenture Act:

               (a) the term "cash  transaction"  means 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;

               (b) the term  "self-liquidating  paper" means any draft,  bill of
      exchange,  acceptance or obligation  which is made,  drawn,  negotiated or
      incurred  by the  Company  for the  purpose  of  financing  the  purchase,
      processing,  manufacturing,  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 security, provided the security is
      received by the Trustee  simultaneously  with the creation of the creditor
      relationship with the


                                       -54-

      Company  arising  from  the  making, drawing,  negotiating or incurring
      of the draft,  bill of  exchange, acceptance or obligation.

SECTION 914. Co-trustees and Separate Trustees.

               At any time or  times,  for the  purpose  of  meeting  the  legal
requirements of any applicable  jurisdiction,  the Company and the Trustee shall
have power to appoint,  and,  upon the written  request of the Trustee or of the
Holders of at least 33% in principal amount of the Securities then  Outstanding,
the Company  shall for such purpose join with the Trustee in the  execution  and
delivery of all instruments and agreements  necessary or proper to appoint,  one
or more Persons  approved by the Trustee  either to act as  co-trustee,  jointly
with the Trustee, or to act as separate trustee, in either case with such powers
as may be provided in the instrument of appointment,  and to vest in such Person
or Persons,  in the capacity  aforesaid,  any  property,  title,  right or power
deemed necessary or desirable,  subject to the other provisions of this Section.
If the  Company  does not join in such  appointment  within  15 days  after  the
receipt  by it of a  request  so to do,  or if an Event of  Default  shall  have
occurred  and be  continuing,  the  Trustee  alone shall have power to make such
appointment.

               Should any written  instrument or instruments from the Company be
required  by any  co-trustee  or  separate  trustee so  appointed  to more fully
confirm to such co-trustee or separate  trustee such property,  title,  right or
power, any and all such instruments shall, on request, be executed, acknowledged
and delivered by the Company.

               Every  co-trustee  or  separate  trustee  shall,  to  the  extent
permitted by law, but to such extent only, be appointed subject to the following
conditions:

               (a) the Securities shall be authenticated and delivered,  and all
      rights, powers, duties and obligations hereunder in respect of the custody
      of securities, cash and other personal property held by, or required to be
      deposited  or pledged  with,  the Trustee  hereunder,  shall be  exercised
      solely, by the Trustee;

               (b) the rights,  powers,  duties and obligations hereby conferred
      or imposed  upon the  Trustee in respect of any  property  covered by such
      appointment  shall be conferred or imposed upon and exercised or performed
      either by the Trustee or by the Trustee  and such  co-trustee  or separate
      trustee  jointly,  as shall be provided in the instrument  appointing such
      co-trustee or separate trustee, except to the extent that under any law of
      any  jurisdiction  in which any  particular  act is to be  performed,  the
      Trustee shall be  incompetent or unqualified to perform such act, in which
      event such rights,  powers,  duties and obligations shall be exercised and
      performed by such co-trustee or separate trustee;

               (c) the Trustee at any time, by an instrument in writing executed
      by it, with the concurrence of the Company,  may accept the resignation of
      or remove any co-trustee or separate trustee appointed under this Section,
      and, if an Event of Default  shall have  occurred and be  continuing,  the
      Trustee shall have power to accept the


                                       -55-

      resignation of, or remove, any such co-trustee or separate trustee without
      the  concurrence of the Company.  Upon the written request of the Trustee,
      the Company  shall join with the Trustee in the  execution and delivery of
      all  instruments  and  agreements  necessary or proper to effectuate  such
      resignation or removal.  A successor to any co-trustee or separate trustee
      so  resigned or removed may be  appointed  in the manner  provided in this
      Section;

               (d)  no  co-trustee  or  separate  trustee   hereunder  shall  be
      personally liable by reason of any act or omission of the Trustee,  or any
      other such trustee hereunder; and

               (e) any Act of Holders  delivered to the Trustee  shall be deemed
      to have been delivered to each such co-trustee and separate trustee.

SECTION 915. Appointment of Authenticating Agent

               The Trustee may  appoint an  Authenticating  Agent or Agents with
respect to the  Securities  of one or more series,  which shall be authorized to
act on behalf of the Trustee to  authenticate  Securities  of such series issued
upon original  issuance and upon exchange,  registration  of transfer or partial
redemption  thereof or pursuant to Section 306, and Securities so  authenticated
shall be  entitled  to the  benefits  of this  Indenture  and shall be valid and
obligatory  for all  purposes  as if  authenticated  by the  Trustee  hereunder.
Wherever  reference is made in this Indenture to the authentication and delivery
of  Securities by the Trustee or the Trustee's  certificate  of  authentication,
such reference shall be deemed to include  authentication and delivery on behalf
of the Trustee by an  Authenticating  Agent and a certificate of  authentication
executed  on  behalf  of  the   Trustee  by  an   Authenticating   Agent.   Each
Authenticating  Agent shall be  acceptable to the Company and shall at all times
be a  corporation  organized  and doing  business  under the laws of the  United
States,  any State or territory thereof or the District of Columbia,  authorized
under such laws to act as  Authenticating  Agent,  having a combined capital and
surplus of not less than  $50,000,000  and subject to supervision or examination
by Federal or State authority. If such Authenticating Agent publishes reports of
condition  at least  annually,  pursuant to law or to the  requirements  of said
supervising or examining  authority,  then for the purposes of this Section, the
combined capital and surplus of such Authenticating  Agent shall be deemed to be
its  combined  capital  and  surplus as set forth in its most  recent  report of
condition so published. If at any time an Authenticating Agent shall cease to be
eligible in accordance with the provisions of this Section,  such Authenticating
Agent shall resign  immediately  in the manner and with the effect  specified in
this Section.

               Any corporation into which an Authenticating  Agent may be merged
or converted or with which it may be consolidated,  or any corporation resulting
from any merger,  conversion or consolidation to which such Authenticating Agent
shall be a party,  or any  corporation  succeeding  to the  corporate  agency or
corporate  trust business of an  Authenticating  Agent,  shall continue to be an
Authenticating  Agent,  provided such  corporation  shall be otherwise  eligible
under this Section,  without the execution or filing of any paper or any further
act on the part of the Trustee or the Authenticating Agent.


                                       -56-

               An Authenticating  Agent may resign at any time by giving written
notice  thereof to the Trustee and to the  Company.  The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company. Upon receiving such a notice of
resignation  or  upon  such  a  termination,   or  in  case  at  any  time  such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section,  the Trustee may appoint a successor  Authenticating
Agent which shall be  acceptable to the Company.  Any  successor  Authenticating
Agent upon acceptance of its appointment  hereunder shall become vested with all
the rights, powers and duties of its predecessor hereunder,  with like effect as
if originally  named as an  Authenticating  Agent.  No successor  Authenticating
Agent shall be appointed unless eligible under the provisions of this Section.

               The Trustee agrees to pay to each Authenticating  Agent from time
to time  reasonable  compensation  for its services under this Section,  and the
Trustee  shall be entitled to be  reimbursed  for such  payments,  in accordance
with, and subject to the provisions of Section 907.

               The  provisions  of Sections 308, 904 and 905 shall be applicable
to each Authenticating Agent.

               If an  appointment  with respect to the Securities of one or more
series shall be made pursuant to this Section, the Securities of such series may
have   endorsed   thereon,   in  addition  to  the  Trustee's   certificate   of
authentication,  an alternate certificate of authentication substantially in the
following form:


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


                                            ------------------------
                                            As Trustee


                                            By
                                              ----------------------
                                              As Authenticating
                                                Agent

                                            By
                                              ----------------------
                                              Authorized Signatory


               If all of the Securities of a series may not be originally issued
at  one  time,   and  if  the  Trustee  does  not  have  an  office  capable  of
authenticating  Securities upon original  issuance located in a Place of Payment
where the Company wishes to have  Securities of such series  authenticated  upon
original issuance, the Trustee, if so requested by the Company in writing (which
writing  need not comply  with  Section  102 and need not be  accompanied  by an
Opinion of  Counsel),  shall  appoint,  in  accordance  with this Section and in
accordance  with such  procedures  as shall be  acceptable  to the  Trustee,  an
Authenticating Agent having an


                                       -57-

office in a Place of Payment  designated  by the  Company  with  respect to such
series of Securities.

                                ARTICLE TEN

             Holders' Lists and Reports by Trustee and Company

SECTION 1001. Lists of Holders.

               Semiannually,  not later than June 1 and December 1 in each year,
commencing  June 1, 1996,  and at such other times as the Trustee may request in
writing,  the  Company  shall  furnish or cause to be  furnished  to the Trustee
information as to the names and addresses of the Holders,  and the Trustee shall
preserve such  information and similar  information  received by it in any other
capacity and afford to the Holders access to information so preserved by it, all
to such  extent,  if any,  and in such  manner as shall be required by the Trust
Indenture Act; provided, however, that no such list need be furnished so long as
the Trustee shall be the Security Registrar.

SECTION 1002. Reports by Trustee and Company.

               Not later than  November 1 in each year,  commencing  November 1,
1996,  the Trustee  shall  transmit to the Holders and the  Commission a report,
dated as of the next  preceding  September  15,  with  respect to any events and
other matters  described in Section  313(a) of the Trust  Indenture Act, in such
manner and to the extent  required by the Trust Indenture Act. The Trustee shall
transmit to the Holders and the Commission,  and the Company shall file with the
Trustee  (within 30 days after filing with the Commission in the case of reports
which pursuant to the Trust  Indenture Act must be filed with the Commission and
furnished to the Trustee) and transmit to the Holders,  such other  information,
reports and other documents,  if any, at such times and in such manner, as shall
be required by the Trust Indenture Act.


                               ARTICLE ELEVEN

             Consolidation, Merger, Conveyance or Other Transfer

SECTION 1101. Company May Consolidate, etc., Only on Certain Terms.

               The Company  shall not  consolidate  with or merge into any other
corporation,  or convey or otherwise transfer or lease its properties and assets
substantially as an entirety to any Person, unless

               (a) the corporation  formed by such  consolidation  or into which
      the  Company is merged or the  Person  which  acquires  by  conveyance  or
      transfer, or which leases,


                                       -58- 

      the  properties  and assets of the  Company  substantially  as an entirety
      shall be a Person  organized  and validly  existing  under the laws of the
      United  States,  any State thereof or the District of Columbia,  and shall
      expressly  assume,  by an  indenture  supplemental  hereto,  executed  and
      delivered to the Trustee, in form satisfactory to the Trustee, the due and
      punctual payment of the principal of and premium, if any, and interest, if
      any, on all  Outstanding  Securities and the performance of every covenant
      of this Indenture on the part of the Company to be performed or observed;

               (b) immediately  after giving effect to such transaction no Event
      of Default,  and no event  which,  after  notice or lapse of time or both,
      would become an Event of Default,  shall have occurred and be  continuing;
      and

               (c) the Company shall have  delivered to the Trustee an Officer's
      Certificate   and  an  Opinion  of  Counsel,   each   stating   that  such
      consolidation,  merger,  conveyance,  or other  transfer or lease and such
      supplemental  indenture  comply with this Article and that all  conditions
      precedent  herein  provided  for relating to such  transactions  have been
      complied with.

SECTION 1102. Successor Corporation Substituted.

               Upon any  consolidation  by the  Company  with or  merger  by the
Company into any other corporation or any conveyance, or other transfer or lease
of the  properties  and assets of the  Company  substantially  as an entirety in
accordance  with  Section  1101,  the  successor   corporation  formed  by  such
consolidation  or into  which the  Company is merged or the Person to which such
conveyance,  transfer or lease is made shall succeed to, and be substituted for,
and may exercise every right and power of, the Company under this Indenture with
the same  effect  as if such  successor  Person  had been  named as the  Company
herein,  and thereafter,  except in the case of a lease, the predecessor  Person
shall be relieved of all  obligations and covenants under this Indenture and the
Securities Outstanding hereunder.

                                ARTICLE TWELVE

                            Supplemental Indentures

SECTION 1201. Supplemental Indentures Without Consent of Holders.

               Without the consent of any Holders,  the Company and the Trustee,
at any  time  and  from  time to time,  may  enter  into one or more  indentures
supplemental  hereto,  in  form  satisfactory  to the  Trustee,  for  any of the
following purposes:

               (a) to evidence the  succession of another  Person to the Company
      and the  assumption by any such  successor of the covenants of the Company
      herein and in the Securities, all as provided in Article Eleven; or


                                       -59- 

               (b) to  add  one or  more  covenants  of  the  Company  or  other
      provisions  for the  benefit  of all  Holders  or for the  benefit  of the
      Holders  of,  or to  remain  in  effect  only so long as  there  shall  be
      Outstanding,  Securities of one or more specified  series, or to surrender
      any right or power herein conferred upon the Company; or

               (c) to add any  additional  Events of Default with respect to all
      or any series of Securities Outstanding hereunder; or

               (d) to change or eliminate any provision of this  Indenture or to
      add any new provision to this Indenture;  provided,  however, that if such
      change,  elimination or addition shall  adversely  affect the interests of
      the Holders of  Securities of any series  Outstanding  on the date of such
      indenture  supplemental  hereto  in any  material  respect,  such  change,
      elimination or addition shall become effective with respect to such series
      only pursuant to the provisions of Section 1202 hereof or when no Security
      of such series remains Outstanding; or

               (e) to provide  collateral  security  for all but not part of the
      Securities; or

               (f) to establish the form or terms of Securities of any series as
      contemplated by Sections 201 and 301; or

               (g) to provide  for the  authentication  and  delivery  of bearer
      securities and coupons appertaining thereto representing interest, if any,
      thereon  and  for  the  procedures  for  the  registration,  exchange  and
      replacement  thereof and for the giving of notice to, and the solicitation
      of the vote or consent of, the holders thereof,  and for any and all other
      matters incidental thereto; or

               (h) to evidence  and provide for the  acceptance  of  appointment
      hereunder  by  a  separate  or  successor  Trustee  with  respect  to  the
      Securities  of one or  more  series  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 911(b); or

               (i) to provide for the procedures  required to permit the Company
      to utilize,  at its option, a  noncertificated  system of registration for
      all, or any series of, the Securities; or

               (j) to change any place or places where (1) the  principal of and
      premium, if any, and interest,  if any, on all or any series of Securities
      shall be payable,  (2) all or any series of Securities  may be surrendered
      for  registration of transfer,  (3) all or any series of Securities may be
      surrendered  for  exchange  and (4)  notices  and  demands  to or upon the
      Company in respect of all or any series of Securities  and this  Indenture
      may be served; or


                                       -60-

               (k) to cure any ambiguity, to correct or supplement any provision
      herein  which may be defective or  inconsistent  with any other  provision
      herein,  or to make any other changes to the  provisions  hereof or to add
      other  provisions with respect to matters or questions  arising under this
      Indenture,  provided  that  such  other  changes  or  additions  shall not
      adversely  affect the interests of the Holders of Securities of any series
      in any material respect.

               Without  limiting the generality of the  foregoing,  if the Trust
Indenture  Act as in effect at the date of the  execution  and  delivery of this
Indenture or at any time thereafter shall be amended and

                     (x) if any such amendment shall require one or more changes
                  to any  provisions  hereof  or  the  inclusion  herein  of any
                  additional provisions,  or shall by operation of law be deemed
                  to effect  such  changes or  incorporate  such  provisions  by
                  reference or otherwise, this Indenture shall be deemed to have
                  been  amended so as to conform to such  amendment to the Trust
                  Indenture  Act, and the Company and the Trustee  may,  without
                  the  consent  of  any   Holders,   enter  into  an   indenture
                  supplemental  hereto to effect or  evidence  such  changes  or
                  additional provisions; or

                     (y) if any such amendment  shall permit one or more changes
                  to, or the elimination of, any provisions hereof which, at the
                  date of the  execution  and  delivery  hereof  or at any  time
                  thereafter,  are  required  by the Trust  Indenture  Act to be
                  contained herein,  this Indenture shall be deemed to have been
                  amended to effect such changes or elimination, and the Company
                  and the Trustee may, without the consent of any Holders, enter
                  into  an  indenture   supplemental  hereto  to  evidence  such
                  amendment hereof.

SECTION 1202. Supplemental Indentures With Consent of Holders.

               With the  consent of the  Holders of not less than a majority  in
aggregate  principal  amount of the  Securities  of all series then  Outstanding
under this Indenture,  considered as one class, by Act of said Holders delivered
to the  Company  and  the  Trustee,  the  Company,  when  authorized  by a Board
Resolution,   and  the  Trustee  may  enter  into  an  indenture  or  indentures
supplemental  hereto for the purpose of adding any provisions to, or changing in
any manner or eliminating  any of the provisions of, this Indenture or modifying
in any manner the rights of the Holders of  Securities  of such series under the
Indenture; provided, however, that if there shall be Securities of more than one
series  Outstanding  hereunder and if a proposed  supplemental  indenture  shall
directly affect the rights of the Holders of Securities of one or more, but less
than all, of such series,  then the consent only of the Holders of a majority in
aggregate principal amount of the Outstanding Securities of


                                       -61-

all series so directly affected, considered as one class, shall be required; and
provided, further, that no such supplemental indenture shall:

               (a)  change  the  Stated  Maturity  of the  principal  of, or any
      installment  of principal of or interest on (except as provided in Section
      311 hereof),  any Security,  or reduce the principal amount thereof or the
      rate of  interest  thereon (or the amount of any  installment  of interest
      thereon)  or change  the  method of  calculating  such rate or reduce  any
      premium  payable  upon  the  redemption  thereof,  or  change  the coin or
      currency (or other property),  in which any Security or any premium or the
      interest thereon is payable, or impair the right to institute suit for the
      enforcement  of any such  payment on or after the Stated  Maturity  of any
      Security (or, in the case of redemption, on or after the Redemption Date),
      without, in any such case, the consent of the Holder of such Security, or

               (b) reduce the percentage in principal  amount of the Outstanding
      Securities of any series (or, if applicable,  in liquidation preference of
      any series of Preferred  Securities),  the consent of the Holders of which
      is required  for any such  supplemental  indenture,  or the consent of the
      Holders  of  which is  required  for any  waiver  of  compliance  with any
      provision  of  this  Indenture  or  of  any  default   hereunder  and  its
      consequences,  or reduce the  requirements  of Section  1304 for quorum or
      voting,  without,  in any such case,  the  consent of the  Holders of each
      Outstanding Security of such series, or

               (c) modify any of the provisions of this Section,  Section 607 or
      Section  813 with  respect  to the  Securities  of any  series,  except to
      increase the  percentages in principal  amount referred to in this Section
      or such  other  Sections  or to  provide  that  other  provisions  of this
      Indenture  cannot be modified or waived  without the consent of the Holder
      of each Outstanding  Security affected thereby;  provided,  however,  that
      this clause  shall not be deemed to require the consent of any Holder with
      respect to changes in the  references  to "the  Trustee"  and  concomitant
      changes in this Section,  or the deletion of this  proviso,  in accordance
      with the requirements of Sections 911(b) and 1201(h).

Notwithstanding the foregoing, so long as any of the Preferred Securities remain
outstanding,  the Trustee may not consent to a supplemental indenture under this
Section  1202  without  the  prior  consent,  obtained  as  provided  in a Trust
Agreement pertaining to a Trust which issued such Preferred  Securities,  of the
holders of not less than a majority in aggregate  liquidation  preference of all
Preferred Securities issued by such Trust affected, considered as one class, or,
in the case of changes  described  in clauses  (a),  (b) and (c) above,  100% in
aggregate   liquidation   preference  of  all  such  Preferred  Securities  then
outstanding  which  would  be  affected  thereby,  considered  as one  class.  A
supplemental  indenture  which  changes  or  eliminates  any  covenant  or other
provision of this  Indenture  which has expressly  been included  solely for the
benefit of one or more  particular  series of Securities,  or which modifies the
rights of the Holders of Securities of such series with respect to such covenant
or other


                                       -62-

provision,  shall be deemed not to affect the rights under this Indenture of the
Holders of Securities of any other series.

               It shall  not be  necessary  for any Act of  Holders  under  this
Section to approve the particular form of any proposed  supplemental  indenture,
but it shall be sufficient if such Act shall  approve the substance  thereof.  A
waiver by a Holder of such Holder's right to consent under this Section shall be
deemed to be a consent of such Holder.

SECTION 1203. Execution of Supplemental Indentures.

               In executing,  or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture,  the Trustee shall be entitled to receive,
and  (subject  to Section  901) shall be fully  protected  in relying  upon,  an
Opinion of Counsel stating that the execution of such supplemental  indenture is
authorized  or  permitted by this  Indenture.  The Trustee may, but shall not be
obligated  to,  enter into any such  supplemental  indenture  which  affects the
Trustee's own rights, duties,  immunities or liabilities under this Indenture or
otherwise.

SECTION 1204. Effect of Supplemental Indentures.

               Upon the  execution  of any  supplemental  indenture  under  this
Article,  this  Indenture  shall be modified in accordance  therewith,  and such
supplemental indenture shall form a part of this Indenture for all purposes; and
every Holder of Securities theretofore or thereafter authenticated and delivered
hereunder shall be bound thereby.  Any supplemental  indenture permitted by this
Article may restate this Indenture in its entirety,  and, upon the execution and
delivery  thereof,  any such  restatement  shall  supersede  this  Indenture  as
theretofore in effect for all purposes.

SECTION 1205. Conformity With Trust Indenture Act.

               Every  supplemental  indenture  executed pursuant to this Article
shall conform to the requirements of the Trust Indenture Act as then in effect.

SECTION 1206. Reference in Securities to Supplemental Indentures.

               Securities of any series  authenticated  and delivered  after the
execution of any supplemental  indenture pursuant to this Article may, and shall
if required by the Trustee,  bear a notation in form  approved by the Trustee as
to any matter provided for in such supplemental  indenture. If the Company shall
so determine,  new  Securities  of any series so modified as to conform,  in the
opinion of the Trustee and the Company,  to any such supplemental  indenture may
be prepared and executed by the Company and  authenticated  and delivered by the
Trustee in exchange for Outstanding Securities of such series.


                                       -63-

SECTION 1207. Modification Without Supplemental Indenture

               If the terms of any  particular  series of Securities  shall have
been  established  in  a  Board  Resolution  or  an  Officer's   Certificate  as
contemplated  by  Section  301,  and not in an  indenture  supplemental  hereto,
additions to, changes in or the elimination of any of such terms may be effected
by means of a supplemental  Board  Resolution or Officer's  Certificate,  as the
case may be, delivered to, and accepted by, the Trustee; provided, however, that
such  supplemental  Board  Resolution  or  Officer's  Certificate  shall  not be
accepted by the Trustee or  otherwise  be effective  unless all  conditions  set
forth  in this  Indenture  which  would  be  required  to be  satisfied  if such
additions,  changes or elimination  were  contained in a supplemental  indenture
shall have been  appropriately  satisfied.  Upon the  acceptance  thereof by the
Trustee,  any such supplemental Board Resolution or Officer's  Certificate shall
be deemed to be a  "supplemental  indenture"  for  purposes of Section  1204 and
1206.


                           ARTICLE THIRTEEN

             Meetings of Holders; Action Without Meeting

SECTION 1301. Purposes for Which Meetings May Be Called.

               A meeting of Holders of Securities of one or more, or all, series
may be called  at any time and from time to time  pursuant  to this  Article  to
make,  give or take  any  request,  demand,  authorization,  direction,  notice,
consent,  waiver or other action provided by this Indenture to be made, given or
taken by Holders of Securities of such series.

SECTION 1302. Call, Notice and Place of Meetings.

               (a) The  Trustee  may at any time call a meeting  of  Holders  of
      Securities  of one or more,  or all,  series for any purpose  specified in
      Section  1301, to be held at such time and at such place in the Borough of
      Manhattan,  The City of New York, as the Trustee shall determine, or, with
      the  approval of the  Company,  at any other  place.  Notice of every such
      meeting,  setting  forth  the time and the  place of such  meeting  and in
      general terms the action  proposed to be taken at such  meeting,  shall be
      given,  in the manner  provided in Section  106, not less than 21 nor more
      than 180 days prior to the date fixed for the meeting.

               (b) If the Trustee shall have been requested to call a meeting of
      the Holders of Securities of one or more, or all, series by the Company or
      by the Holders of 33% in aggregate principal amount of all of such series,
      considered  as one class,  for any purpose  specified in Section  1301, by
      written request setting forth in reasonable  detail the action proposed to
      be taken at the meeting,  and the Trustee  shall not have given the notice
      of such meeting  within 21 days after receipt of such request or shall not
      thereafter  proceed to cause the  meeting to be held as  provided  herein,
      then the Company or the Holders of Securities of such series in the amount
      above specified,


                                       -64-

      as the case may be, may determine the time and the place in the Borough of
      Manhattan,  The  City of New  York,  or in such  other  place  as shall be
      determined or approved by the Company,  for such meeting and may call such
      meeting  for such  purposes  by  giving  notice  thereof  as  provided  in
      subsection (a) of this Section.

               (c) Any meeting of Holders of  Securities of one or more, or all,
      series  shall be valid  without  notice if the Holders of all  Outstanding
      Securities  of such  series  are  present  in  person  or by proxy  and if
      representatives  of the Company and the Trustee are present,  or if notice
      is waived in writing  before or after the  meeting  by the  Holders of all
      Outstanding  Securities  of  such  series,  or by  such of them as are not
      present at the  meeting in person or by proxy,  and by the Company and the
      Trustee.

SECTION 1303. Persons Entitled to Vote at Meetings.

               To be entitled to vote at any meeting of Holders of Securities of
one or  more,  or all,  series a  Person  shall  be (a) a Holder  of one or more
Outstanding  Securities  of  such  series,  or  (b)  a  Person  appointed  by an
instrument  in  writing  as  proxy  for a  Holder  or  Holders  of one  or  more
Outstanding  Securities  of such  series  by such  Holder or  Holders.  The only
Persons who shall be entitled to attend any meeting of Holders of  Securities of
any series  shall be the  Persons  entitled  to vote at such  meeting  and their
counsel,   any   representatives   of  the  Trustee  and  its  counsel  and  any
representatives of the Company and its counsel.

SECTION 1304. Quorum; Action.

               The Persons  entitled to vote a majority in  aggregate  principal
amount of the  Outstanding  Securities  of the  series  with  respect to which a
meeting  shall have been  called as  hereinbefore  provided,  considered  as one
class,  shall constitute a quorum for a meeting of Holders of Securities of such
series;  provided,  however,  that if any action is to be taken at such  meeting
which  this  Indenture  expressly  provides  may be  taken by the  Holders  of a
specified percentage,  which is less than a majority, in principal amount of the
Outstanding  Securities  of such series,  considered  as one class,  the Persons
entitled  to  vote  such  specified   percentage  in  principal  amount  of  the
Outstanding Securities of such series, considered as one class, shall constitute
a quorum.  In the absence of a quorum within one hour of the time  appointed for
any such meeting,  the meeting  shall,  if convened at the request of Holders of
Securities of such series,  be  dissolved.  In any other case the meeting may be
adjourned  for such period as may be  determined  by the chairman of the meeting
prior to the adjournment of such meeting. In the absence of a quorum at any such
adjourned  meeting,  such  adjourned  meeting may be further  adjourned for such
period  as may be  determined  by the  chairman  of  the  meeting  prior  to the
adjournment of such adjourned  meeting.  Except as provided by Section  1305(e),
notice of the  reconvening of any meeting  adjourned for more than 30 days shall
be given as provided in Section  1302(a) not less than 10 days prior to the date
on which the meeting is scheduled to be reconvened. Notice of the reconvening of
an adjourned meeting shall state expressly the percentage, as provided above, of
the principal  amount of the  Outstanding  Securities of such series which shall
constitute a quorum.


                                       -65-

               Except as limited by Section 1202, any resolution  presented to a
meeting or  adjourned  meeting duly  reconvened  at which a quorum is present as
aforesaid  may be  adopted  only by the  affirmative  vote of the  Holders  of a
majority in aggregate  principal  amount of the  Outstanding  Securities  of the
series with respect to which such meeting shall have been called,  considered as
one class;  provided,  however,  that, except as so limited, any resolution with
respect to any action which this  Indenture  expressly  provides may be taken by
the  Holders  of a  specified  percentage,  which is less  than a  majority,  in
principal amount of the Outstanding Securities of such series, considered as one
class,  may be adopted at a meeting or an adjourned  meeting duly reconvened and
at which a quorum is present as aforesaid by the affirmative vote of the Holders
of such specified  percentage in principal amount of the Outstanding  Securities
of such series, considered as one class.

               Any resolution passed or decision taken at any meeting of Holders
of Securities  duly held in accordance with this Section shall be binding on all
the Holders of Securities of the series with respect to which such meeting shall
have been held, whether or not present or represented at the meeting.

SECTION 1305.  Attendance  at Meetings;  Determination  of Voting  Rights;
               Conduct and Adjournment of Meetings.

               (a)  Attendance  at meetings of Holders of  Securities  may be in
      person or by proxy;  and, to the extent  permitted  by law, any such proxy
      shall  remain in  effect  and be  binding  upon any  future  Holder of the
      Securities   with   respect  to  which  it  was  given  unless  and  until
      specifically  revoked  by the Holder or future  Holder of such  Securities
      before being voted.

               (b) Notwithstanding  any other provisions of this Indenture,  the
      Trustee may make such reasonable  regulations as it may deem advisable for
      any meeting of Holders of  Securities in regard to proof of the holding of
      such  Securities  and of the  appointment  of proxies and in regard to the
      appointment  and  duties  of  inspectors  of  votes,  the  submission  and
      examination  of proxies,  certificates  and other evidence of the right to
      vote,  and such other matters  concerning the conduct of the meeting as it
      shall deem appropriate.  Except as otherwise  permitted or required by any
      such regulations,  the holding of Securities shall be proved in the manner
      specified in Section 104 and the  appointment of any proxy shall be proved
      in the manner  specified in Section 104. Such regulations may provide that
      written  instruments  appointing  proxies,  regular on their face,  may be
      presumed valid and genuine  without the proof  specified in Section 104 or
      other proof.

               (c) The Trustee  shall,  by an instrument  in writing,  appoint a
      temporary  chairman of the  meeting,  unless the  meeting  shall have been
      called by the  Company or by Holders as provided  in Section  1302(b),  in
      which case the Company or the Holders of Securities of the series  calling
      the meeting,  as the case may be, shall in like manner appoint a temporary
      chairman.  A permanent  chairman and a permanent  secretary of the meeting
      shall be elected by vote of the Persons entitled to vote a


                                       -66-

       majority in aggregate principal amount of the Outstanding Securities of
       all series represented at the meeting, considered as one class.

               (d) At any meeting  each Holder or proxy shall be entitled to one
      vote for each $1 principal  amount of Securities  held or  represented  by
      him;  provided,  however,  that no vote  shall be cast or  counted  at any
      meeting in respect of any Security challenged as not Outstanding and ruled
      by the chairman of the meeting to be not Outstanding.  The chairman of the
      meeting  shall have no right to vote,  except as a Holder of a Security or
      proxy.

               (e) Any meeting  duly called  pursuant to Section 1302 at which a
      quorum is present may be adjourned  from time to time by Persons  entitled
      to vote a  majority  in  aggregate  principal  amount  of the  Outstanding
      Securities  of all series  represented  at the meeting,  considered as one
      class; and the meeting may be held as so adjourned without further notice.

SECTION 1306. Counting Votes and Recording Action of Meetings.

               The vote upon any resolution  submitted to any meeting of Holders
shall be by written  ballots on which shall be subscribed  the signatures of the
Holders  or of their  representatives  by proxy and the  principal  amounts  and
serial  numbers of the  Outstanding  Securities,  of the series with  respect to
which the meeting  shall have been  called,  held or  represented  by them.  The
permanent  chairman of the meeting  shall  appoint two  inspectors  of votes who
shall count all votes cast at the meeting for or against any  resolution and who
shall make and file with the  secretary of the meeting  their  verified  written
reports of all votes cast at the meeting.  A record of the  proceedings  of each
meeting of Holders  shall be prepared by the  secretary of the meeting and there
shall be attached to said record the original reports of the inspectors of votes
on any vote by ballot taken thereat and affidavits by one or more persons having
knowledge  of the facts  setting  forth a copy of the notice of the  meeting and
showing  that said  notice  was  given as  provided  in  Section  1302  and,  if
applicable,  Section  1304.  Each  copy  shall be  signed  and  verified  by the
affidavits of the  permanent  chairman and secretary of the meeting and one such
copy  shall be  delivered  to the  Company,  and  another  to the  Trustee to be
preserved by the Trustee,  the latter to have attached thereto the ballots voted
at the meeting.  Any record so signed and verified shall be conclusive  evidence
of the matters therein stated.

SECTION 1307. Action Without Meeting.

               In  lieu  of a vote  of  Holders  at a  meeting  as  hereinbefore
contemplated in this Article,  any request,  demand,  authorization,  direction,
notice,  consent,  waiver or other action may be made, given or taken by Holders
by written instruments as provided in Section 104.


                                       -67-


                               ARTICLE FOURTEEN

       Immunity of Incorporators, Stockholders, Officers and Directors

SECTION 1401. Liability Solely Corporate

               No recourse  shall be had for the payment of the  principal of or
premium, if any, or interest, if any, on any Securities, or any part thereof, or
for  any  claim  based  thereon  or  otherwise  in  respect  thereof,  or of the
indebtedness represented thereby, or upon any obligation,  covenant or agreement
under  this  Indenture,  against  any  incorporator,   stockholder,  officer  or
director,  as such, past, present or future of the Company or of any predecessor
or  successor   corporation  (either  directly  or  through  the  Company  or  a
predecessor or successor  corporation),  whether by virtue of any constitutional
provision,  statute or rule of law, or by the  enforcement  of any assessment or
penalty  or  otherwise;  it being  expressly  agreed  and  understood  that this
Indenture and all the Securities are solely corporate  obligations,  and that no
personal  liability   whatsoever  shall  attach  to,  or  be  incurred  by,  any
incorporator,  stockholder, officer or director, past, present or future, of the
Company or of any  predecessor  or  successor  corporation,  either  directly or
indirectly  through the Company or any  predecessor  or  successor  corporation,
because of the  indebtedness  hereby  authorized or under or by reason of any of
the obligations,  covenants or agreements  contained in this Indenture or in any
of the  Securities  or to be implied  herefrom or  therefrom,  and that any such
personal  liability is hereby  expressly  waived and released as a condition of,
and as part of the  consideration  for, the execution of this  Indenture and the
issuance of the Securities.

                               ARTICLE FIFTEEN

                          Subordination of Securities

SECTION 1501. Securities Subordinate to Senior Indebtedness.

               The Company,  for itself,  its successors and assigns,  covenants
and agrees,  and each Holder of the Securities of each series, by its acceptance
thereof, likewise covenants and agrees, that the payment of the principal of and
premium,  if any, and  interest,  if any, on each and all of the  Securities  is
hereby  expressly  subordinated  and subject to the extent and in the manner set
forth in this  Article,  in right of payment to the prior payment in full of all
Senior Indebtedness.

               Each Holder of the  Securities of each series,  by its acceptance
thereof, authorizes and directs the Trustee on its behalf to take such action as
may be necessary or appropriate to effectuate the  subordination  as provided in
this Article, and appoints the Trustee its attorney-in-fact for any and all such
purposes.


                                       -68-

SECTION 1502. Payment Over of Proceeds of Securities

               In the event (a) of any  insolvency or bankruptcy  proceedings or
any receivership,  liquidation,  reorganization or other similar  proceedings in
respect  of  the  Company  or a  substantial  part  of its  property,  or of any
proceedings  for  liquidation,  dissolution  or other winding up of the Company,
whether  or not  involving  insolvency  or  bankruptcy,  or (b)  subject  to the
provisions of Section 1503,  that (i) a default shall have occurred with respect
to the payment of principal of or interest on or other monetary  amounts due and
payable on any Senior Indebtedness,  or (ii) there shall have occurred a default
(other than a default in the payment of principal or interest or other  monetary
amounts  due and  payable)  in respect of any  Senior  Indebtedness,  as defined
therein or in the instrument under which the same is outstanding, permitting the
holder or holders  thereof to  accelerate  the maturity  thereof (with notice or
lapse of time, or both), and such default shall have continued beyond the period
of grace,  if any, in respect  thereof,  and, in the cases of subclauses (i) and
(ii) of this clause  (b),  such  default  shall not have been cured or waived or
shall  not have  ceased  to  exist,  or (c) that the  principal  of and  accrued
interest  on the  Securities  of any  series  shall have been  declared  due and
payable  pursuant  to  Section  801 and such  declaration  shall  not have  been
rescinded and annulled as provided in Section 802, then:

                     (1) the holders of all Senior  Indebtedness  shall first be
                  entitled to receive payment of the full amount due thereon, or
                  provision  shall be made for such  payment in money or money's
                  worth,  before  the  Holders  of  any of  the  Securities  are
                  entitled to receive a payment on account of the  principal  of
                  or interest on the  indebtedness  evidenced by the Securities,
                  including,  without limitation,  any payments made pursuant to
                  Articles Four and Five;

                     (2) any  payment  by, or  distribution  of assets  of,  the
                  Company of any kind or character, whether in cash, property or
                  securities,  to  which  any  Holder  or the  Trustee  would be
                  entitled  except for the provisions of this Article,  shall be
                  paid  or  delivered  by the  person  making  such  payment  or
                  distribution,  whether a trustee in bankruptcy,  a receiver or
                  liquidating  trustee or otherwise,  directly to the holders of
                  such   Senior   Indebtedness   or  their   representative   or
                  representatives  or to  the  trustee  or  trustees  under  any
                  indenture under which any  instruments  evidencing any of such
                  Senior Indebtedness may have been issued, ratably according to
                  the  aggregate  amounts  remaining  unpaid on  account of such
                  Senior Indebtedness held or represented by each, to the extent
                  necessary to make  payment in full of all Senior  Indebtedness
                  remaining unpaid after giving effect to any concurrent payment
                  or distribution (or provision therefor) to the holders of such
                  Senior  Indebtedness,  before any payment or  distribution  is
                  made  to the  Holders  of the  indebtedness  evidenced  by the
                  Securities or to the Trustee under this Indenture; and


                                       -69-

                     (3) in the event that,  notwithstanding the foregoing,  any
                  payment by, or  distribution  of assets of, the Company of any
                  kind or character, whether in cash, property or securities, in
                  respect of  principal of or interest on the  Securities  or in
                  connection   with  any   repurchase  by  the  Company  of  the
                  Securities,  shall be  received  by the  Trustee or any Holder
                  before all Senior  Indebtedness  is paid in full, or provision
                  is made for such  payment  in money  or  money's  worth,  such
                  payment or distribution in respect of principal of or interest
                  on the Securities or in connection  with any repurchase by the
                  Company of the Securities shall be paid over to the holders of
                  such   Senior   Indebtedness   or  their   representative   or
                  representatives  or to  the  trustee  or  trustees  under  any
                  indenture  under  which any  instruments  evidencing  any such
                  Senior   Indebtedness   may  have  been  issued,   ratably  as
                  aforesaid,  for  application  to the  payment  of  all  Senior
                  Indebtedness   remaining   unpaid   until   all  such   Senior
                  Indebtedness shall have been paid in full, after giving effect
                  to  any  concurrent  payment  or  distribution  (or  provision
                  therefor) to the holders of such Senior Indebtedness.

               Notwithstanding  the  foregoing,  at any time after the 123rd day
following  the date of deposit of cash or  Government  Obligations  pursuant  to
Section 701  (provided  all  conditions  set out in such Section shall have been
satisfied),  the funds so deposited and any interest thereon will not be subject
to any rights of holders of Senior Indebtedness  including,  without limitation,
those arising under this Article  Fifteen;  provided that no event  described in
clauses  (d) and (e) of Section 801 with  respect to the  Company  has  occurred
during such 123-day period.

               For purposes of this Article only,  the words "cash,  property or
securities"  shall not be deemed to  include  shares of stock of the  Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan or reorganization  or readjustment  which are subordinate
in  right  of  payment  to all  Senior  Indebtedness  which  may at the  time be
outstanding  to the same extent as, or to a greater  extent than, the Securities
are so  subordinated  as  provided in this  Article.  The  consolidation  of the
Company  with,  or the merger of the Company into,  another  corporation  or the
liquidation or  dissolution of the Company  following the conveyance or transfer
of its  property as an entirety,  or  substantially  as an entirety,  to another
corporation upon the terms and conditions  provided for in Article Eleven hereof
shall not be deemed a dissolution, winding-up, liquidation or reorganization for
the purposes of this Section 1502 if such other corporation  shall, as a part of
such consolidation,  merger,  conveyance or transfer, comply with the conditions
stated in Article Eleven hereof. Nothing in Section 1501 or in this Section 1502
shall  apply to claims of, or  payments  to, the  Trustee  under or  pursuant to
Section 907.


                                       -70-

SECTION 1503. Disputes with Holders of Certain Senior Indebtedness.

               Any  failure by the Company to make any payment on or perform any
other obligation in respect of Senior Indebtedness,  other than any indebtedness
incurred by the Company or assumed or guaranteed, directly or indirectly, by the
Company for money  borrowed (or any  deferral,  renewal,  extension or refunding
thereof) or any other  obligation  as to which the  provisions  of this  Section
shall have been waived by the Company in the  instrument or instruments by which
the Company incurred, assumed, guaranteed or otherwise created such indebtedness
or obligation, shall not be deemed a default under clause (b) of Section 1502 if
(i) the  Company  shall be  disputing  its  obligation  to make such  payment or
perform such  obligation and (ii) either (A) no final judgment  relating to such
dispute  shall have been issued  against the Company  which is in full force and
effect and is not  subject  to further  review,  including  a judgment  that has
become  final by reason of the  expiration  of the time within which a party may
seek  further  appeal or review,  or (B) in the event  that a  judgment  that is
subject to further  review or appeal has been issued,  the Company shall in good
faith be  prosecuting  an appeal or other  proceeding  for  review and a stay or
execution shall have been obtained pending such appeal or review.

SECTION 1504. Subrogation.

               Senior Indebtedness shall not be deemed to have been paid in full
unless the holders  thereof  shall have  received  cash (or  securities or other
property   satisfactory  to  such  holders)  in  full  payment  of  such  Senior
Indebtedness  then  outstanding.  Subject  to the prior  payment  in full of all
Senior  Indebtedness,  the  rights of the  Holders  of the  Securities  shall be
subrogated  to the rights of the holders of Senior  Indebtedness  to receive any
further payments or distributions of cash, property or securities of the Company
applicable to the holders of the Senior  Indebtedness until all amounts owing on
the  Securities  shall be paid in full;  and such payments or  distributions  of
cash,  property or  securities  received by the  Holders of the  Securities,  by
reason of such subrogation,  which otherwise would be paid or distributed to the
holders of such Senior Indebtedness shall, as between the Company, its creditors
other than the holders of Senior Indebtedness,  and the Holders, be deemed to be
a payment  by the  Company to or on  account  of Senior  Indebtedness,  it being
understood  that the provisions of this Article are and are intended  solely for
the purpose of defining the relative rights of the Holders, on the one hand, and
the holders of the Senior Indebtedness, on the other hand.

SECTION 1505. Obligation of the Company Unconditional.

               Nothing  contained in this Article or elsewhere in this Indenture
or in the Securities is intended to or shall impair,  as among the Company,  its
creditors  other than the holders of Senior  Indebtedness  and the Holders,  the
obligation of the Company,  which is absolute and  unconditional,  to pay to the
Holders the  principal  of and interest on the  Securities  as and when the same
shall become due and payable in accordance  with their terms,  or is intended to
or shall affect the relative  rights of the Holders and creditors of the Company
other than the  holders of Senior  Indebtedness,  nor shall  anything  herein or
therein prevent the Trustee or any Holder from exercising all remedies otherwise
permitted by applicable law


                                       -71-

upon default under this  Indenture,  subject to the rights,  if any,  under this
Article of the holders of Senior  Indebtedness  in respect of cash,  property or
securities of the Company received upon the exercise of any such remedy.

               Upon any payment or  distribution  of assets or securities of the
Company  referred to in this  Article,  the  Trustee  and the  Holders  shall be
entitled to rely upon any order or decree of a court of  competent  jurisdiction
in which such dissolution, winding up, liquidation or reorganization proceedings
are pending for the purpose of ascertaining  the persons entitled to participate
in  such  distribution,  the  holders  of  the  Senior  Indebtedness  and  other
indebtedness of the Company,  the amount thereof or payable thereon,  the amount
or amounts paid or distributed thereon, and all other facts pertinent thereto or
to this Article.

SECTION 1506. Priority of Senior Indebtedness Upon Maturity.

               Upon the maturity of the principal of any Senior  Indebtedness by
lapse of time,  acceleration  or  otherwise,  all  matured  principal  of Senior
Indebtedness  and interest and premium,  if any,  thereon shall first be paid in
full before any payment of principal or premium, if any, or interest, if any, is
made upon the Securities or before any Securities can be acquired by the Company
or any sinking fund payment is made with respect to the Securities  (except that
required sinking fund payments may be reduced by Securities acquired before such
maturity of such Senior Indebtedness).

SECTION 1507. Trustee as Holder of Senior Indebtedness.

               The  Trustee  shall be  entitled  to all rights set forth in this
Article with respect to any Senior  Indebtedness  at any time held by it, to the
same extent as any other holder of Senior Indebtedness.  Nothing in this Article
shall deprive the Trustee of any of its rights as such holder.

SECTION 1508. Notice to Trustee to Effectuate Subordination.

               Notwithstanding  the  provisions  of this  Article  or any  other
provision of the  Indenture,  the Trustee shall not be charged with knowledge of
the  existence  of any facts which would  prohibit  the making of any payment of
moneys to or by the  Trustee  unless and until the Trustee  shall have  received
written notice  thereof from the Company,  from a Holder or from a holder of any
Senior Indebtedness or from any representative or representatives of such holder
and,  prior to the receipt of any such  written  notice,  the  Trustee  shall be
entitled,  subject to Section  901, in all respects to assume that no such facts
exist; provided, however, that, if prior to the fifth Business Day preceding the
date upon which by the terms  hereof any such moneys may become  payable for any
purpose,  or in the event of the execution of an instrument  pursuant to Section
702 acknowledging satisfaction and discharge of this Indenture, then if prior to
the second Business Day preceding the date of such execution,  the Trustee shall
not have  received  with respect to such moneys the notice  provided for in this
Section,  then, anything herein contained to the contrary  notwithstanding,  the
Trustee may, in its discretion, receive such moneys and/or apply the same to the
purpose for which they were


                                       -72-

received, and shall not be affected by any notice to the contrary,  which may be
received  by  it on  or  after  such  date;  provided,  however,  that  no  such
application  shall  affect the  obligations  under this  Article of the  persons
receiving such moneys from the Trustee.

SECTION 1509. Modification, Extension, etc. of Senior Indebtedness

               The holders of Senior  Indebtedness may, without affecting in any
manner the subordination of the payment of the principal of and premium, if any,
and interest, if any, on the Securities, at any time or from time to time and in
their absolute discretion, agree with the Company to change the manner, place or
terms of  payment,  change or extend the time of payment  of, or renew or alter,
any Senior Indebtedness, or amend or supplement any instrument pursuant to which
any Senior  Indebtedness  is issued,  or exercise or refrain from exercising any
other  of  their  rights  under  the  Senior  Indebtedness  including,   without
limitation,  the waiver of default  thereunder,  all without notice to or assent
from the Holders or the Trustee.

SECTION  1510.  Trustee  Has  No  Fiduciary  Duty  to  Holders  of  Senior
                Indebtedness.

               With respect to the holders of Senior  Indebtedness,  the Trustee
undertakes to perform or to observe only such of its covenants and objectives as
are  specifically  set forth in this  Indenture,  and no  implied  covenants  or
obligations  with  respect to the holders of Senior  Indebtedness  shall be read
into this Indenture against the Trustee.  The Trustee shall not be deemed to owe
any  fiduciary  duty to the  holders  of Senior  Indebtedness,  and shall not be
liable to any such  holders  if it shall  mistakenly  pay over or deliver to the
Holders or the Company or any other Person, money or assets to which any holders
of Senior Indebtedness shall be entitled by virtue of this Article or otherwise.

SECTION 1511. Paying Agents Other Than the Trustee.

               In case at any time any Paying Agent other than the Trustee shall
have been  appointed  by the  Company  and be then  acting  hereunder,  the term
"Trustee" as used in this Article  shall in such case (unless the context  shall
otherwise  require) be construed as extending to and including such Paying Agent
within its meaning as fully for all intents and purposes as if such Paying Agent
were named in this Article in addition to or in place of the Trustee;  provided,
however,  that Sections 1507, 1508 and 1510 shall not apply to the Company if it
acts as Paying Agent.

SECTION 1512. Rights of Holders of Senior Indebtedness Not Impaired.

               No right of any present or future  holder of Senior  Indebtedness
to  enforce  the  subordination  herein  shall  at any  time  or in  any  way be
prejudiced  or  impaired by any act or failure to act on the part of the Company
or by any noncompliance by the Company with the terms,  provisions and covenants
of this Indenture,  regardless of any knowledge thereof any such holder may have
or be otherwise charged with.

                                       -73-

SECTION 1513. Effect of Subordination Provisions; Termination

               Notwithstanding  anything contained herein to the contrary, other
than as provided in the immediately  succeeding sentence,  all the provisions of
this Indenture shall be subject to the provisions of this Article, so far as the
same may be applicable thereto.

               Notwithstanding  anything  contained herein to the contrary,  the
provisions  of this  Article  Fifteen  shall be of no  further  effect,  and the
Securities  shall no longer be  subordinated  in right of  payment  to the prior
payment of Senior  Indebtedness,  if the  Company  shall have  delivered  to the
Trustee a notice to such effect.  Any such notice delivered by the Company shall
not be deemed to be a supplemental indenture for purposes of Article Twelve.

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

               This  instrument  may be executed in any number of  counterparts,
each of which  so  executed  shall be  deemed  to be an  original,  but all such
counterparts shall together constitute but one and the same instrument.


                                       -74-

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


                                    MINNESOTA POWER & LIGHT COMPANY


                                    By: James Vizanko
                                       -------------------------------
                                        James K. Vizanko
                                        Treasurer


                                       -75-



                                    THE BANK OF NEW YORK, Trustee


                                    By: Helen M. Cotiaux
                                       -------------------------------



                                       -76-


STATE OF MINNESOTA                  )
                                            ) ss.:
COUNTY OF ST. LOUIS                 )


                  On the 20th day of  March,  1996,  before me  personally  came
James K. Vizanko,  to me known,  who, being by me duly sworn, did depose and say
that  he is the  Treasurer  of  Minnesota  Power  &  Light  Company,  one of the
corporations  described in and which executed the foregoing instrument;  that he
knows the 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.



                                             Kristie J. Lindstrom
                                             ----------------------------------
                                             Kristie Lindstrom
                                              Notary Public, State of Minnesota
                                                    St. Louis County
                                             My. Comm. Expires [    ] 31, 2000



                                       -77-


STATE OF NEW YORK          )
                                            ) ss.:
COUNTY OF NEW YORK         )


                  On the 19th day of  March,  1996,  before me  personally  came
Helen Cotiaux, to me known, who, being by me duly sworn, did depose and say that
he is a  Vice  President  of  The  Bank  of New  York,  one of the  corporations
described in and which executed the foregoing instrument; that he knows the 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.


                                            Susan Fields
                                            ----------------------------------

                                              Notary Public, State of New York
                                                    No. 31-4980055
                                                Qualified in New York County
                                              Commission Expires April 8, 1997