Document:

<PAGE>

                                                                    Exhibit 10.7

                      EMPLOYMENT AND SEVERANCE AGREEMENT

     THIS EMPLOYMENT AND SEVERANCE AGREEMENT is made and entered this 22nd day
of May, 2001 by and among JAMES R. LAUFFER, an individual and resident of
Pennsylvania ("Lauffer"), PROMISTAR FINANCIAL CORPORATION, a Pennsylvania
corporation ("Promistar"), PROMISTAR BANK, a national banking association
("Promistar Bank"), FNH CORPORATION, a Pennsylvania corporation ("FNH") and
FIRST NATIONAL BANK OF HERMINIE, a national banking association (the "Bank");

     WHEREAS, Promistar and FNH are parties to an Agreement and Plan of
Reorganization dated as of February 24, 2001 (the "Merger Agreement"), which
contemplates that FNH would merge with and into Promistar and that the Bank
would merge with and into Promistar Bank (the FNH into Promistar and Bank into
Promistar Bank mergers are hereinafter referred to collectively as the
"Mergers");

     WHEREAS, Lauffer is a director and executive officer of FNH and of the Bank
and, after the Mergers will be a director of Promistar and an employee of
Promistar Bank for an indefinite period;

     WHEREAS, Lauffer and the Bank are parties to (i) a Second Amended and
Restated Employment Contract dated as of August 9, 1999 (the "Employment
Contract"); (ii) an Executive Supplemental Income Agreement dated as of March
25, 1987 (the "Supplemental Agreement"); (iii) an Executive Salary Continuation
Agreement dated as of July 15, 1999 (the "Continuation Agreement"); and (iv) an
Endorsement Method Split Dollar Plan Agreement (the "Split Dollar Agreement" and
collectively the "Lauffer Employment Contracts");

     WHEREAS, the parties have agreed that, as of the Effective Time (as such
term is defined in the Merger Agreement), Promistar and Promistar Bank will
expressly assume each and all of the obligations of the Bank under the Lauffer
Employment Contracts as such documents are in effect as of the date hereof and
giving effect to the amendments contemplated by this Employment and Severance
Agreement;

     WHEREAS, the parties have agreed that the Employment Contract will be
amended as of the Effective Time to provide, generally, that (i) Promistar and
Promistar Bank shall pay the severance amount due thereunder in a lump-sum and
(ii) such severance amount will be increased if Shareholder Approval (as defined
below) of the amendment to the Continuation Agreement is not received;

     WHEREAS, the parties have agreed that the Continuation Agreement will be
amended as of the Effective Time to provide, generally, that (i) Promistar and
Promistar Bank shall pay the Retirement and Post-Retirement Death Benefit under
Section IV of the Continuation Agreement and (ii) the offsets described in the
second sentence of Section IV shall no longer apply (that is, the benefit will
be increased) if Shareholder Approval of that amendment is received;
<PAGE>

     WHEREAS, the parties have agreed that Lauffer will accept employment with
Promistar Bank and, upon cessation of such employment, he will serve as a
director of Promistar;

     WHEREAS, Sections 5.01(o) and 5.02(l) of the Merger Agreement contemplate,
and make a condition precedent to the Mergers, an agreement among Lauffer, FNH
and Promistar amending the Employment Contract and the Continuation Agreement
and providing for the compensation to be paid to Lauffer following the Mergers;

     WHEREAS, this Employment and Severance Agreement, together with the
Exhibits hereto, is intended to be the agreement contemplated by Sections
5.01(o) and 5.02(l) of the Merger Agreement;

     NOW, THEREFORE, in consideration of the mutual promises hereinafter made
and intending to be legally bound, the parties hereto agree as follow:

1.   Termination of this Employment and Severance Agreement.
     ------------------------------------------------------

     If the Effective Time (as defined in the Merger Agreement) does not occur,
this Employment and Severance Agreement shall be without force and effect and
shall be terminated in its entirety without action by any party upon termination
of the Merger Agreement. Without limiting the generality of the foregoing, if
the Effective Time does not occur, the Mergers will not occur, Lauffer will
retain all rights he has or may have with respect to the Bank and/or FNH under
the Lauffer Employment Contracts and neither Promistar nor Promistar Bank will
have any obligations to Lauffer under this Agreement.

2.   Amendment of Continuation Agreement and Employment Contract.
     -----------------------------------------------------------

     Effective as of the Effective Time, the Continuation Agreement and the
Employment Contract shall be amended in the respective forms attached hereto as
Exhibits 1 and 2 to provide generally as follows:

     a.   Continuation Agreement.  If the Mergers occur and the shareholders of
          ----------------------
FNH approve, at or before the Effective Time and in accordance with Section
280G(b)(5)(B) of the Code and Section 6 of this Agreement ("Shareholder
Approval") the elimination of the offsets otherwise required under the second
sentence of Section IV of the Continuation Agreement (the "Offsets"), the
Offsets shall be eliminated under the Continuation Agreement and the amounts
payable to Lauffer will be increased accordingly;

     b.   Employment Contract.  If the Mergers occur and the Shareholder
          --------------------
Approval of  the amendment to the Continuation Agreement is received, the
termination benefit payable to Lauffer pursuant to Section 12 of the Employment
shall be converted from salary continuation to a lump-sum payment.  If the
Mergers occur and Shareholder Approval of the amendment to the Continuation
Agreement is not received, the lump-sum amount payable under Section 12 of the
Employment Contract, as amended, shall be increased to $821,000 if the
automobile otherwise described in Section 4(c) below is transferred by the Bank
prior to the Effective Time in a transfer not part of a parachute payment as
defined in Section 280G(b)(2) of the Code or $778,000 if the transfer of such
automobile is at the Effective Time or otherwise as part of a parachute payment.
Furthermore, the Employment Contract shall be amended to the extent

                                       2
<PAGE>

necessary to ensure that there is no duplication between the provisions of the
Employment Contract and this Employment and Severance Agreement.

     c.   Assumption of Continuation Agreement and Employment Contract, as
          ----------------------------------------------------------------
amended, by Promistar and Promistar Bank.  As amended, as of the Effective Time,
----------------------------------------
the Continuation Agreement and the Employment Contract shall be assumed by
Promistar and Promistar Bank.

3.   Assumption of Split Dollar Agreement and Supplemental Agreement by
     ------------------------------------------------------------------
Promistar and Promistar Bank.
----------------------------

     As of the Effective Time, Promistar and Promistar Bank shall assume all
obligations to Lauffer under the Split Dollar Agreement and the Supplemental
Agreement.

4.   Employment of Lauffer by Promistar Bank.
     ---------------------------------------

     At the Effective Time, Lauffer shall become an employee of Promistar Bank
and shall have a title, duties and office commensurate with his experience and
abilities, which position shall be no less senior than the level required to
cause Lauffer to be eligible to retain his office in Independent Commercial
Bankers Association ("ICBA"). Promistar Bank agrees to employ Lauffer and
Lauffer agrees to accept such employment. Subject to the Section 5 of this
Agreement, the employment will be employment at will and either party may
terminate the employment arrangement upon thirty (30) days written notice to the
other. During the period of employment, Promistar Bank shall pay and provide to
Lauffer:

     (a)  a monthly salary of no less than $19,662;

     (b)  eligibility to earn annual bonuses on terms no less favorable to
Lauffer than the bonus arrangements provided by the Bank prior to the Mergers
and, if Lauffer's service is less than 12 months in any period taken into
account for an annual bonus, the bonus shall be pro rated for the period of time
actually served by Lauffer during that period;

     (c)  if not transferred prior to the Effective Time, a transfer of title,
free and clear of all encumbrances, of the automobile provided for Lauffer's use
by the Bank prior to the Mergers;

     (d)  participation in such employee benefit and fringe benefit plans as are
provided to senior executives of Promistar Bank on the same terms and conditions
as the such other senior executives of Promistar Bank may participate, provided,
however, Lauffer will decline participation in the Promistar Bank health plan in
favor of receipt of reimbursement of premiums paid under health plan coverage in
effect prior to his employment, as such reimbursement is described in Section
4(f)(2) below;

     (e)  vacations taken at Lauffer's discretion of not less in the aggregate
than four (4) nor more than 6 weeks per calendar year;

     (f)  Lauffer shall be entitled to the following additional fringe benefits:

          (i)  a payment of up to $2,500 per year in each of calendar years
     2001, 2002 and 2003 for financial planning and tax services provided to
     Lauffer and/or his spouse;

                                       3
<PAGE>

          (ii)   reimbursement, in an amount not to exceed $8,500 per year, for
     the payment of premiums for health insurance coverage as provided under
     arrangements secured by or with respect to Lauffer prior to the Effective
     Time in which Lauffer intends to continue his coverage;

          (iii)  reimbursement of up to $1,500 per year in country club dues
     each year for calendar years 2001, 2002 and 2003;

          (iv)   reimbursement of up to $10,000 each year for calendar years
     2001, 2002 and 2003 for the expenses of attendance by Lauffer and Lauffer's
     spouse of ICBA meetings or other banking industry conventions and/or
     conferences;

          (v)    until the death of Lauffer, payment of premiums on term life
     insurance policies with a death benefit of not less than $250,000 (which
     may be provided by continuing the policy purchased by the Bank and in
     effect on Lauffer's life prior to the Merger;

          (vi)   payment of premiums in accordance with the terms of the Lincoln
     Benefit Life Insurance Endorsement Method Split Dollar Policy;

          (vii)  payment at his age 65 of the balance accrued for Lauffer under
     the FNH Director's Deferred Compensation Plan prior to the Mergers in
     accordance with its terms and, at the Effective Time, Promistar shall place
     an amount of cash with a value equal to such accrued balance in an
     irrevocable grantor trust with an institution with trust powers as trustee
     and trust provisions requiring payment to Lauffer or his beneficiary at
     Lauffer's age 65.

          (viii) At the Effective Time, Promistar shall place an amount of cash
     with a present value equal to the aggregate of its payment obligations to
     Lauffer under the  Supplemental Agreement and its estimated payment
     obligations to Lauffer under the Continuation Agreement in an irrevocable
     grantor trust with an institution with trust powers as trustee and trust
     provisions requiring payment to Lauffer or his beneficiary in accordance
     with the terms of such agreements.

5.   Compensation to Lauffer for Services as Director of Promistar.
     -------------------------------------------------------------

     During the period Lauffer is employed by Promistar Bank as an active
employee under Section 4 above, he shall receive no compensation from Promistar
for his services as a director of Promistar and, instead, he shall serve as an
employee-director of Promistar. Upon his termination of employment with
Promistar Bank for any reason, Promistar shall compensate Lauffer for his
services as a director in accordance with Promistar's compensation program for
outside (non-employee) directors then in effect. In addition, since it is
contemplated that Lauffer will represent Promistar at ICBA, community and
industry functions, if Lauffer terminates employment with Promistar Bank prior
to the expiration of any times or dates set forth in Section 4(f) above,
Promistar shall pay or provide to Lauffer the fringe benefits set forth in
Section 4(f) for the times remaining in the respective subsections of Section
4(f) to the extent not then paid or provided by Promistar Bank.

                                       4
<PAGE>

6.   Shareholder Approval.
     --------------------

     Shareholder Approval shall be deemed received if, at or before the
Effective Time:

     (a)  the payments contemplated by the Change in Control Agreements (before
giving effect to the Non-duplication Amendments) are approved by a vote of
persons who owned, immediately before the Merger, more than 75% of the voting
power of all outstanding stock of FNH within the meaning of Prop. Treas. Reg.
1.280G-1, Q&A 7(c); and

     (b)  Promistar receives an opinion of counsel acceptable to Promistar
(which may be counsel to the Bank) that the requirements for the exemption set
forth at Section 280G(b)(5) of the Code and Prop. Treas. Reg. 1.280G-1, Q&A 7 5,
6 and 7 have been satisfied.

7.   Non Competition.
     ---------------

     During the period of employment under Section 4 of this Agreement and for
one year thereafter, Lauffer shall refrain from competing with Promistar and
Promistar Bank except with the prior written consent of Promistar and Promistar
Bank. The phrase "refrain from competing with Promistar and Promistar Bank"
shall mean that Lauffer will not engage, directly or indirectly (including, by
way of example only, as a principal, partner, venturer, employee or agent) nor
have any direct or indirect interest in any enterprise (a "Competing
Enterprise") which competes or holds an interest of more than five percent (5%)
of an entity which competes with Promistar and Promistar Bank, or with any
subsidiary of Promistar and Promistar Bank, by engaging in providing banking
services to individuals or corporations engaging in any activity in any
geographic area which the business plan of Promistar and/or Promistar Bank as in
effect at the Effective Time, contemplates Promistar and Promistar Bank to be
engaged within two (2) years following the Effective Time. It is agreed that the
foregoing provisions shall not restrict Lauffer from either (i) being a director
of or having any investments or other interests in an enterprise which is not a
Competing Enterprise or (ii) having any investments in any Competing Enterprise
the stock of which is listed on a national securities exchange or traded
publicly over-the-counter so long as such investment does not give Lauffer more
than three percent (3%) of the voting stock of such company.

8.   Confidentiality.
     ---------------

     Lauffer agrees:

     (a)  To keep secret all business plans and mailing lists of the Promistar
or Promistar Bank and all matters of Promistar or Promistar Bank specifically
indicated to be confidential by the Promistar or Promistar Bank or established
as confidential by written Promistar or Promistar Bank policy, and not to
disclose them to any one outside Promistar or Promistar Bank either during or
after his employment with Promistar or Promistar Bank, except with the prior
written consent of the applicable entity of Promistar or Promistar Bank or as
required by law; and

     (b)  To deliver promptly to Promistar or Promistar Bank on termination of
employment of Lauffer all memoranda, notes, records, reports and other documents
(and all copies thereof) with respect to any such confidential matters and other
proprietary information

                                       5
<PAGE>

(such as customer lists, supplier lists, etc.) which Lauffer may then possess or
have under his control.

9.   Arbitration.
     -----------

     Any disputes hereunder shall be settled by arbitration in Johnstown,
Pennsylvania, under the auspices of, and in accordance with the National Rules
for the Resolution of Employment Disputes of the American Arbitration
Association, and the decision in such arbitration shall be final and conclusive
on the parties and judgment upon such decision may be entered in any court
having jurisdiction thereof. No arbitrator shall have the power of authority to
attempt to change the character of such payments, reform this Agreement or to
award more to one party or the other than allowed by the Agreement.

10.  Notices.
     -------

     All notices and other communications that are required or may be given
under this Agreement shall be in writing and shall be delivered personally or by
registered or certified mail addressed to the party concerned at the following
addresses:

          If to Promistar:

          Promistar Financial Corporation
          551 Main Street
          Johnstown, Pennsylvania 15901
          Attention: John H. Anderson

          If to Promistar Bank:

          Promistar Bank
          551 Main Street
          Johnstown, Pennsylvania 15901
          Attention: John H. Anderson

          If to FNH:

          FNH Corporation
          98 Wendel Road
          Irwin, Pennsylvania 15642

          If to the Bank:

          First National Bank of Herminie
          98 Wendel Road
          Irwin, Pennsylvania 15642

                                       6
<PAGE>

          If to Lauffer:

          James R. Lauffer
          405 Old Route 30
          Irwin, PA 15642

          with a copy to:

          James J. Barnes, Esq.
          Richard D. Rose, Esq.
          Buchanan Ingersoll Professional Corporation
          301 Grant Street

          20th Floor - One Oxford Centre
          Pittsburgh, PA 15219

or to such other address as shall be designated by notice in writing to the
other party in accordance herewith.  Notices and other communications hereunder
shall be deemed effectively given when personally delivered, or, if mailed, 72
hours after deposit in the United States mail.

11.  Miscellaneous.
     -------------

     (a)  Except as specifically set forth herein, this Agreement supersedes all
prior agreements, arrangements and undertakings, written or oral, relating to
the subject matter hereof.

     (b)  After the Effective Time,

          (i)  this Agreement shall inure to the benefit of and be binding upon
     Lauffer, Lauffer's heirs, representatives or estate.

          (ii) this Agreement shall be binding upon and inure to the benefit of
     Promistar and Promistar Bank and its successors and assigns.  Promistar and
     Promistar Bank shall require any successor (whether direct or indirect, by
     purchase, conversion of form, merger, consolidation or otherwise) to all or
     substantially all of the business or assets of Promistar and Promistar
     Bank, by agreement in form and substance satisfactory to the Executive,
     expressly to assume and agree to perform this Agreement in the same manner
     and to the same extent that Promistar and Promistar Bank would be required
     to perform if no such succession had taken place.  As used in this
     subparagraph, "Bank" shall mean (A) such entity as defined in this
     Agreement, (B) each parent or subsidiary thereof and (C) any successor,
     other than a regulatory agency, to the business or any of the assets of
     Promistar and Promistar Bank which executes and delivers the agreement
     provided for in this Subsection 11(b)(ii) or which otherwise becomes bound
     by all the terms and provisions of this Agreement by operation of law.

     (c)  This Agreement may be amended, modified, superseded, canceled, renewed
or extended and the terms or covenants hereof may be waived, only by a written
instrument executed by each of the parties hereto, or in the case of a waiver,
by the party waiving compliance. The failure of any party at any time or times
to require performance of any

                                       7
<PAGE>

provisions hereof shall in no manner affect the right at a later time to enforce
such provisions. No waiver by either party of the breach of any term or covenant
contained in this Agreement, whether by conduct or otherwise, in any one or more
instances, shall be deemed to be, or construed as, a further or continuing
waiver of any such breach or a waiver of the breach, preceding or succeeding, of
any other term or covenant contained in this Agreement.

     (d)  In the event any one or more of the covenants, terms or provisions
contained in this Agreement shall be invalid, illegal or unenforceable in any
respect, the validity of the remaining covenants, terms and provisions contained
herein shall be in no way affected, prejudiced or disturbed thereby.

     (e)  This Agreement is personal in nature and neither of the parties hereto
shall, without the consent of the other, assign or transfer this Agreement or
any rights or obligations hereunder. Without limiting the foregoing, the
Executive's right to receive payments hereunder shall not be assignable or
transferable, whether by pledge, creation of a security interest or otherwise,
other than a transfer to his beneficiary pursuant to the terms of the applicable
Lauffer Employment Contract or by his will or by the laws of descent or
distribution, and in the event of any attempted assignment or transfer contrary
to this Subsection 11(e) neither Promistar nor Promistar Bank shall have
liability to pay any amount so attempted to be assigned or transferred.

     (f)  This Agreement shall be governed by and construed in accordance with
the laws of the Commonwealth of Pennsylvania regardless of its principles of
conflict of laws, except as such laws of the Commonwealth of Pennsylvania may be
preempted by the laws of the United States.

     (g)  All payments required hereunder shall be made from the general assets
of Promistar or Promistar Bank and Lauffer shall have no rights greater than the
rights of a general creditor of Promistar or Promistar Bank.

     (h)  Promistar and Promistar Bank may withhold from any payment required
hereunder such amounts for federal, state and local income tax as Promistar and
Promistar Bank, in good faith, determines to be required by applicable laws,
provided, however, Promistar and Promistar Bank shall provide Lauffer with
notice of the amount so withheld and shall promptly pay over such amounts to the
appropriate taxing body.

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered as of the date first above written.

ATTEST:                             PROMISTAR

By: /s/ Janet E. Gillen             By: /s/ John H. Anderson
  ------------------------              ---------------------------------------
     Assistant Secretary            Title: Chairman and Chief Executive Officer
                                           ------------------------------------

ATTEST:                             PROMISTAR BANK

By: /s/ Janet E. Gillen             By: /s/ Steven C. Ackmann
  ------------------------              ---------------------------------------
     Assistant Secretary            Title: Chairman, President and Chief
                                           Operating Officer
                                         --------------------------------------

                                       8
<PAGE>

ATTEST:                             FNH

By /s/ Kerry M. Anthony             By: /s/ Anthony P. Zello, Jr.
  -----------------------------         ------------------------------------
     EVP/C.O.O.                     Title  Vice President, Personnel Officer
                                           ---------------------------------

ATTEST:                             FIRST NATIONAL BANK OF HERMINIE

By /s/ Kerry M. Anthony             By: /s/ Jay A. Miller
  -----------------------------         ------------------------------------
     EVP/C.O.O.                     Title
                                         -----------------------------------

WITNESS:

By /s/ V. David Lavella             By: /s/ James R. Lauffer
  -----------------------------         ------------------------------------
     Secretary                           James Lauffer

                                       9<PAGE>   1

                                                                     Exhibit 4.4

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

                         QUEST DIAGNOSTICS INCORPORATED,

                                    as Issuer

                     THE SUBSIDIARY GUARANTORS NAMED HEREIN,

                                  as Guarantors

                                       and

                              THE BANK OF NEW YORK,

                                   as Trustee

                                    Indenture

                            Dated as of _____________

                           Providing for the Issuance

                                       of

                             Senior Debt Securities

================================================================================
<PAGE>   2

                         QUEST DIAGNOSTICS INCORPORATED
           Reconciliation and tie between Trust Indenture Act of 1939
                    and Indenture, dated as of _____________

TRUST INDENTURE ACT SECTION                                 INDENTURE SECTION
---------------------------                                 -----------------
Section 310(a)(1).....................................             607
              (a)(2)..................................             607
              (b).....................................             608
Section 312(c)........................................             701
Section 314(a)........................................             703
              (a)(4)..................................            1005
              (c)(1)..................................             102
              (c)(2)..................................             102
              (e).....................................             102
Section 315(b)........................................             601
Section 316(a) (last sentence)........................    101 ("Outstanding")
              (a)(1)(A)...............................          502, 512
              (a)(1)(B)...............................             513
              (b).....................................             508
Section 317(a)(1).....................................             503
              (a)(2)..................................             504
Section 318(a)........................................             111
              (c).....................................             111

----------
NOTE: This reconciliation and tie shall not, for any purpose, be deemed to be a
part of the Indenture.

<PAGE>   3

                                TABLE OF CONTENTS

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101 Definitions......................................................1
SECTION 102 Compliance Certificates and Opinions............................10
SECTION 103 Form of Documents Delivered to Trustee..........................11
SECTION 104 Acts of Holders.................................................11
SECTION 105 Notices, Etc., to Trustee and Company...........................13
SECTION 106 Notice to Holders; Waiver.......................................13
SECTION 107 Effect of Headings and Table of Contents........................14
SECTION 108 Successors and Assigns..........................................14
SECTION 109 Separability Clause.............................................14
SECTION 110 Benefits of Indenture...........................................15
SECTION 111 Governing Law...................................................15
SECTION 112 Legal Holidays..................................................15
SECTION 113 Conflict of Any Provision of Indenture with Trust
              Indenture Act ................................................15
SECTION 114 No Recourse against Others......................................15
SECTION 115 Waiver of Trial by Jury.........................................16

                                   ARTICLE TWO

                                SECURITIES FORMS

SECTION 201 Forms of Securities.............................................16
SECTION 202 Form of Trustee's Certificate of Authentication.................17
SECTION 203 Securities Issuable in Global Form..............................17
SECTION 204 Form of Legend for Book-Entry Securities........................18

                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301 Amount Unlimited; Issuable in Series............................18
SECTION 302 Denominations...................................................22
SECTION 303 Execution, Authentication, Delivery and Dating..................23
SECTION 304 Temporary Securities............................................25
SECTION 305 Registration, Registration of Transfer and Exchange.............27
SECTION 306 Mutilated, Destroyed, Lost and Stolen Securities................30
SECTION 307 Payment of Interest; Interest Rights Preserved; Optional
              Interest Reset ...............................................31
SECTION 308 Optional Extension of Maturity..................................34

                                        i
<PAGE>   4

SECTION 309 Persons Deemed Owners...........................................35
SECTION 310 Cancellation....................................................36
SECTION 311 Computation of Interest.........................................36
SECTION 312 Currency and Manner of Payments in Respect of Securities........36
SECTION 313 Appointment and Resignation of Successor Exchange Rate Agent....40
SECTION 314 CUSIP Numbers...................................................41

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401 Satisfaction and Discharge of Indenture.........................41
SECTION 402 Application of Trust Funds......................................42

                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501 Events of Default...............................................43
SECTION 502 Acceleration of Maturity; Rescission and Annulment..............44
SECTION 503 Collection of Indebtedness and Suits for Enforcement
            by Trustee .....................................................45
SECTION 504 Trustee May File Proofs of Claim................................46
SECTION 505 Trustee May Enforce Claims Without Possession of Securities
              or Coupons ...................................................47
SECTION 506 Application of Money Collected..................................47
SECTION 507 Limitation on Suits.............................................47
SECTION 508 Unconditional Right of Holders to Receive Principal, Premium
              and Interest and Additional Amounts, if Any...................48
SECTION 509 Restoration of Rights and Remedies..............................48
SECTION 510 Rights and Remedies Cumulative..................................48
SECTION 511 Delay or Omission Not Waiver....................................49
SECTION 512 Control by Holders of Securities................................49
SECTION 513 Undertaking for Costs...........................................49
SECTION 514 Waiver of Past Defaults.........................................49
SECTION 515 Waiver of Usury, Stay or Extension Laws.........................50

                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601 Notice of Defaults..............................................50
SECTION 602 Certain Rights of Trustee.......................................50
SECTION 603 Not Responsible for Recitals or Issuance of Securities..........52
SECTION 604 May Hold Securities.............................................53
SECTION 605 Money Held in Trust.............................................53

                                       ii
<PAGE>   5

SECTION 606 Compensation and Reimbursement..................................53
SECTION 607 Corporate Trustee Required; Eligibility.........................54
SECTION 608 Resignation and Removal; Appointment of Successor...............54
SECTION 609 Acceptance of Appointment by Successor..........................55
SECTION 610 Merger, Conversion, Consolidation or Succession to Business.....56
SECTION 611 Appointment of Authenticating Agent.............................57
SECTION 612 Conflicting Interests...........................................58
SECTION 613 Appointment of Co-Trustee.......................................58
SECTION 614 Trustee's Application for Instructions from the Company.........59

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701 Disclosure of Names and Addresses of Holders....................60
SECTION 702 Reports by Trustee..............................................61
SECTION 703 Reports by Company and Subsidiary Guarantors....................61
SECTION 704 Calculation of Original Issue Discount..........................62

                                  ARTICLE EIGHT

                  CONSOLIDATION, MERGER, CONVEYANCE OR TRANSFER

SECTION 801 Company May Consolidate, Etc., Only on Certain Terms............62
SECTION 802 Successor Person Substituted....................................62
SECTION 803 Officers' Certificate and Opinion of Counsel....................63

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

SECTION 901 Supplemental Indentures Without Consent of Holders..............63
SECTION 902 Supplemental Indentures with Consent of Holders.................65
SECTION 903 Execution of Supplemental Indentures............................66
SECTION 904 Effect of Supplemental Indentures...............................67
SECTION 905 Conformity with Trust Indenture Act.............................67
SECTION 906 Reference in Securities to Supplemental Indentures..............67

                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001 Payment of Principal, Premium, if any, and Interest............67
SECTION 1002 Maintenance of Office or Agency................................68

                                       iii
<PAGE>   6

SECTION 1003 Money for Securities Payments to be Held in Trust..............69
SECTION 1004 Corporate Existence............................................70
SECTION 1005 Additional Amounts.............................................70
SECTION 1006 Statement as to Compliance.....................................71
SECTION 1007 Waiver of Certain Covenants....................................72

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101 Applicability of Article.......................................72
SECTION 1102 Election to Redeem; Notice to Trustee..........................72
SECTION 1103 Selection by Trustee of Securities to be Redeemed..............72
SECTION 1104 Notice of Redemption...........................................73
SECTION 1105 Deposit of Redemption Price....................................74
SECTION 1106 Securities Payable on Redemption Date..........................74
SECTION 1107 Securities Redeemed in Part....................................75

                                 ARTICLE TWELVE

                                  SINKING FUNDS

SECTION 1201 Applicability of Article.......................................76
SECTION 1202 Satisfaction of Sinking Fund Payments with Securities..........76
SECTION 1203 Redemption of Securities for Sinking Fund......................76

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

SECTION 1301 Applicability of Article.......................................77
SECTION 1302 Repayment of Securities........................................77
SECTION 1303 Exercise of Option.............................................77
SECTION 1304 When Securities Presented for Repayment Become Due
               and Payable .................................................78
SECTION 1305 Securities Repaid in Part......................................79

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

SECTION 1401 Applicability of Article; Company's Option to Effect
               Defeasance or Covenant Defeasance............................79
SECTION 1402 Defeasance and Discharge.......................................79
SECTION 1403 Covenant Defeasance............................................80
SECTION 1404 Conditions to Defeasance or Covenant Defeasance................80

                                       iv
<PAGE>   7

SECTION 1405 Deposited Money and Government Obligations to Be Held in
               Trust; Other Miscellaneous Provisions........................82

                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

SECTION 1501 Purposes for Which Meetings May Be Called......................83
SECTION 1502 Call, Notice and Place of Meetings.............................83
SECTION 1503 Persons Entitled to Vote at Meetings...........................83
SECTION 1504 Quorum; Action.................................................84
SECTION 1505 Determination of Voting Rights; Conduct and Adjournment
               of Meetings .................................................85
SECTION 1506 Counting Votes and Recording Action of Meetings................86

                                 ARTICLE SIXTEEN

                                   GUARANTEES

SECTION 1601 Guarantees.....................................................86
SECTION 1602 Execution and Delivery of Guarantees...........................87
SECTION 1603 Limitation of Guarantor's Liability............................88

EXHIBIT A - FORMS OF CERTIFICATES

                                        v
<PAGE>   8

            INDENTURE, dated as of ______________, between QUEST DIAGNOSTICS
INCORPORATED, a Delaware corporation (hereinafter called the "Company"), having
its principal office at One Malcolm Avenue, Teterboro, New Jersey 07608, each of
the Subsidiary Guarantors (as hereinafter defined) and THE BANK OF NEW YORK, a
New York banking corporation, as Trustee (hereinafter called the "Trustee").

                RECITALS OF THE COMPANY AND SUBSIDIARY GUARANTORS

            WHEREAS, the Company deems it necessary to issue from time to time
for its lawful purposes senior debt securities (hereinafter called the
"Securities") evidencing its unsecured and unsubordinated indebtedness, which
may or may not be convertible into or exchangeable for any securities of any
Person (including the Company) and which may or may not be guaranteed by the
Subsidiary Guarantors, and has duly authorized the execution and delivery of
this Indenture to provide for the issuance from time to time of the Securities,
to be issued in one or more series, unlimited as to principal amount, to bear
such rates of interest, to mature at such times and to have such other
provisions as provided in this Indenture;

            WHEREAS, this Indenture is subject to the provisions of the Trust
Indenture Act of 1939, as amended, that are required to be part of this
Indenture and shall, to the extent applicable, be governed by such provisions;
and

            WHEREAS, all things necessary to make this Indenture a valid
agreement of the Company and each Subsidiary Guarantor, in accordance with its
terms, have been done;

            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 and coupons, or
of a 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 or unless such definition is
changed or amended in a supplement or amendment to this Indenture:

            (1) the terms defined in this Article have the meanings assigned to
      them in this Article, and include the plural as well as the singular;

            (2) all other terms used herein which are defined in the TIA, either
      directly or by reference therein, have the meanings assigned to them
      therein, and the terms "cash transaction" and "self-liquidating paper", as
      used in TIA Section 311, shall have the meanings assigned to them in the
      rules of the Commission adopted under the TIA;

<PAGE>   9

            (3) all accounting terms not otherwise defined herein have the
      meanings assigned to them in accordance with accounting principles
      generally accepted in the United States; and

            (4) 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 Three, Article Five and
Article Six are defined in those Articles.

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

            "Additional Amounts" means any additional amounts which are required
by a Security or by or pursuant to a Board Resolution, under circumstances
specified therein, to be paid by the Company in respect of certain taxes imposed
on certain Holders and which are owing to such Holders.

            "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 indirectly,
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 authenticating agent appointed by
the Trustee pursuant to Section 611.

            "Authorized Newspaper" means a newspaper, in the English language or
in an official language of the country of publication, customarily published on
each Business Day, whether or not published on Saturdays, Sundays or holidays,
and of general circulation in each place in connection with which the term is
used or in the financial community of each such place. Where successive
publications are required to be made in Authorized Newspapers, the successive
publications may be made in the same or in different newspapers in the same city
meeting the foregoing requirements and in each case on any Business Day.

            "Bearer Security" means any Security established pursuant to Section
201 which is payable to bearer.

            "Board of Directors" means the board of directors of the Company or
any Subsidiary Guarantor, as the case may be, or the executive committee or any
committee of that board duly authorized to act hereunder.

            "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company or any Subsidiary Guarantor,
as the case may be, 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.

                                       2
<PAGE>   10

            "Business Day", when used with respect to any Place of Payment or
any other particular location referred to in this Indenture or in the
Securities, means, unless otherwise specified with respect to any Securities
pursuant to Section 301, each Monday, Tuesday, Wednesday, Thursday and Friday
which is not a day on which banking institutions in that Place of Payment or
particular location are authorized or obligated by law or executive order to
close.

            "Clearstream" means Clearstream Banking societe anonyme or its
successor.

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

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

            "Company" shall mean such successor corporation.

            "Company Request" and "Company Order" mean, respectively, a written
request or order signed in the name of the Company by the Chairman, the
President or a Vice President, and by the Treasurer, an Assistant Treasurer, the
Comptroller or an Assistant Comptroller, the Secretary or an Assistant
Secretary, of the Company, and delivered to the Trustee.

            "Conversion Date" has the meaning specified in Section 312(d).

            "Conversion Event" means the cessation of use of (i) a Foreign
Currency both by the government of the country which issued such currency and
for the settlement of transactions by a central bank or other public
institutions of or within the international banking community, (ii) the euro for
the settlement of transactions by public institutions of or within the European
Communities or (iii) any currency unit (or composite currency) other than the
euro for the purposes for which the euro was established.

            "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 hereof is located at 101 Barclay Street,
New York, New York 10286, Attn: Corporate Trust - Trustee Administration.

            "Corporation" includes corporations, associations, limited liability
companies, companies and business trusts.

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

            "Currency" means any currency or currencies, composite currency or
currency unit or currency units, including, without limitation, the euro, issued
by the government of one or more countries or by any reorganized confederation
or association of such governments.

                                       3
<PAGE>   11

            "Default" means any event which is, or after notice or passage of
time or both would be, an Event of Default.

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

            "Depository Participant" means, with respect to the Depositary Trust
Company (the "Depository") or its nominee, an institution that has an account
therewith.

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

            "Election Date" has the meaning specified in Section 312(h).

            "Euroclear" means Morgan Guaranty Trust Company of New York,
Brussels Office, or its successor as operator of the Euroclear System.

            "European Communities" means the European Union, the European Coal
and Steel Community and the European Atomic Energy Community.

            "Event of Default" has the meaning specified in Article Five.

            "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

            "Exchange Rate Agent", with respect to Securities of or within any
series, means, unless otherwise specified with respect to any Securities
pursuant to Section 301, a New York Clearing House bank designated pursuant to
Section 301 or Section 313.

            "Exchange Rate Officer's Certificate" means a certificate setting
forth (i) the applicable Market Exchange Rate or the applicable bid quotation
and (ii) the Dollar or Foreign Currency amounts of principal (and premium, if
any) and interest, if any (on an aggregate basis and on the basis of a Security
having the lowest denomination principal amount determined in accordance with
Section 302 in the relevant currency or currency unit), payable with respect to
a Security of any series on the basis of such Market Exchange Rate or the
applicable bid quotation signed by the Treasurer, any Vice President or any
Assistant Treasurer of the Company.

            "Foreign Currency" means any Currency, including, without
limitation, the euro, issued by the government of one or more countries other
than the United States of America or by any recognized confederation or
association of such governments.

            "Government Obligations" means securities which are (i) direct
obligations of the United States of America or the government which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (ii) obligations of
a Person controlled or supervised by and acting as an agency or instrumentality
of the United States of America or such government which issued the Foreign
Currency in which the Securities of such series are payable, the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other government, which, in either case, are
not callable or redeemable at the option of

                                       4
<PAGE>   12

the issuer thereof, and shall also include a depository receipt issued by a bank
or trust company as custodian with respect to any such Government Obligation or
a specific payment of interest on or principal of any such Government Obligation
held by such custodian for the account of the holder of a depository receipt;
provided that (except as required by law) such custodian is not authorized to
make any deduction from the amount payable to the holder of such depository
receipt from any amount received by the custodian in respect of the Government
Obligation or the specific payment of interest on or principal of the Government
Obligation evidenced by such depository receipt.

            "Holder" means, in the case of a Registered Security, the Person in
whose name a Security is registered in the Security Register and, in the case of
a Bearer Security, the bearer thereof and, when used with respect to any coupon,
shall mean the bearer thereof.

            "Indenture" means this instrument as originally executed or 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 particular series of Securities established as
contemplated by Section 301; provided, however, that, if at any time more than
one Person is acting as Trustee under this instrument, "Indenture" shall mean,
with respect to any one or more series of Securities for which such Person is
Trustee, this instrument as originally executed or 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
the or those particular series of Securities for which such Person is Trustee
established as contemplated by Section 301, exclusive, however, of any
provisions or terms which relate solely to other series of Securities for which
such Person is not Trustee, regardless of when such terms or provisions were
adopted, and exclusive of any provisions or terms adopted by means of one or
more indentures supplemental hereto executed and delivered after such Person had
become such Trustee but to which such Person, as such Trustee, was not a party.

            "Indexed Security" means a Security as to which all or certain
interest payments and/or the principal amount payable at Maturity are determined
by reference to prices, changes in prices, or differences between prices, of
securities, Currencies, intangibles, goods, articles or commodities or by such
other objective price, economic or other measures as are specified in Section
301 hereof.

            "Interest", when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, shall mean
interest payable after Maturity, and, when used with respect to a Security which
provides for the payment of Additional Amounts pursuant to Section 1004 or
otherwise, includes such Additional Amounts.

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

            "Market Exchange Rate" means, unless otherwise specified with
respect to any Securities pursuant to Section 301, (i) for any conversion
involving a currency unit on the one hand and Dollars or any Foreign Currency on
the other, the exchange rate between the relevant currency unit and Dollars or
such Foreign Currency calculated by the method specified pursuant

                                       5
<PAGE>   13

to Section 301 for the Securities of the relevant series, (ii) for any
conversion of Dollars into any Foreign Currency, the noon buying rate for such
Foreign Currency for cable transfers quoted in New York City as certified for
customs purposes by the Federal Reserve Bank of New York and (iii) for any
conversion of one Foreign Currency into Dollars or another Foreign Currency, the
spot rate at noon local time in the relevant market at which, in accordance with
normal banking procedures, the Dollars or Foreign Currency into which conversion
is being made could be purchased with the Foreign Currency from which conversion
is being made from major banks located in either New York City, London or any
other principal market for Dollars or such purchased Foreign Currency, in each
case determined by the Exchange Rate Agent. Unless otherwise specified with
respect to any Securities pursuant to Section 301, in the event of the
unavailability of any of the exchange rates provided for in the foregoing
clauses (i), (ii) and (iii), the Exchange Rate Agent shall use, in its sole
discretion and without liability on its part, such quotation of the Federal
Reserve Bank of New York as of the most recent available date, or quotations
from one or more major banks in New York City, London or other principal market
for such currency or currency unit in question, or such other quotations as the
Exchange Rate Agent shall deem appropriate. Unless otherwise specified by the
Exchange Rate Agent, if there is more than one market for dealing in any
currency or currency unit by reason of foreign exchange regulations or
otherwise, the market to be used in respect of such currency or currency unit
shall be that upon which a nonresident issuer of securities designated in such
currency or currency unit would purchase such currency or currency unit in order
to make payments in respect of such securities.

            "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 therein or herein provided, whether at the Stated Maturity or
by declaration of acceleration, notice of redemption, notice of option to elect
repayment, notice of exchange or conversion or otherwise.

            "Officers' Certificate" means a certificate signed by the Chairman,
the President or any Vice President and by the Treasurer, an Assistant
Treasurer, the Comptroller or an Assistant Comptroller, the Secretary or an
Assistant Secretary of the Company or any Subsidiary Guarantor, as the case may
be, and delivered to the Trustee.

            "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company or any Subsidiary Guarantor or who may be an employee of
or other counsel for the Company or any Subsidiary Guarantor satisfactory to the
Trustee.

            "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

            "Outstanding", when used with respect to Securities or any series of
any Securities, means, as of the date of determination, all Securities or all
Securities of such series, as the case may be, theretofore authenticated and
delivered under this Indenture, except:

            (A) Securities theretofore cancelled by the Trustee or delivered to
      the Trustee for cancellation;

                                       6
<PAGE>   14

            (B) Securities, or portions thereof, for whose payment or redemption
      or repayment at the option of the Holder money in the necessary amount has
      been theretofore deposited with the Trustee or any Paying Agent (other
      than the Company or any Subsidiary Guarantor) in trust or set aside and
      segregated in trust by the Company or a Subsidiary Guarantor (if the
      Company or such Subsidiary Guarantor shall act as Paying Agent) for the
      Holders of such Securities and any coupons appertaining thereto, provided
      that, if such Securities are to be redeemed, notice of such redemption has
      been duly given pursuant to this Indenture or provision therefor
      satisfactory to the Trustee has been made;

            (C) Securities, except to the extent provided in Sections 1402 and
      1403, with respect to which the Company has effected defeasance and/or
      covenant defeasance as provided in Article Fourteen; and

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

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or are present at
a meeting of Holders for quorum purposes, and for the purpose of making the
calculations required by TIA Section 313, (i) the principal amount of an
Original Issue Discount Security that may be counted in making such
determination or calculation and that shall be deemed to be Outstanding for such
purpose shall be equal to the amount of principal thereof that would be (or
shall have been declared to be) due and payable, at the time of such
determination, upon a declaration of acceleration of the Maturity thereof
pursuant to Section 502, (ii) the principal amount of any Security denominated
in a Foreign Currency that may be counted in making such determination or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined as of the date such Security is originally
issued by the Company as set forth in an Exchange Rate Officer's Certificate
delivered to the Trustee, of the principal amount (or, in the case of an
Original Issue Discount Security or Indexed Security, the Dollar equivalent as
of such date of original issuance of the amount determined as provided in clause
(i) above or (iii) below, respectively) of such Security, (iii) the principal
amount of any Indexed Security that may be counted in making such determination
or calculation and that shall be deemed outstanding for such purpose shall be
equal to the principal face amount of such Indexed Security at original
issuance, unless otherwise provided with respect to such Security pursuant to
Section 301, and (iv) Securities owned by the Company or any other obligor upon
the Securities or any Affiliate of the Company or of such other obligor shall be
disregarded and deemed not to be Outstanding, except that, in determining
whether the Trustee shall be protected in making such calculation or in relying
upon any such request, demand, authorization, direction, notice, consent or
waiver, only Securities which the Trustee actually knows to be so owned shall be
so disregarded. Securities so owned which have been pledged in good faith may be
regarded as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Securities and that
the pledgee is not the Company or any other obligor upon the Securities or any
Affiliate of the Company or of such other obligor.

                                       7
<PAGE>   15

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

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

            "Place of Payment", when used with respect to the Securities of or
within any series, means the place or places where the principal of (and
premium, if any) and interest, if any, on such Securities are payable as
specified and as contemplated by Sections 301 and 1002.

            "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 or a Security to which a
mutilated, destroyed, lost or stolen coupon appertains shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security or
the Security to which the mutilated, destroyed, lost or stolen coupon
appertains.

            "Redemption Date", when used with respect to any Security to be
redeemed, in whole or in part, 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.

            "Registered Security" shall mean any Security which is registered in
the Security Register.

            "Regular Record Date" for the interest payable on any Interest
Payment Date on the Registered Securities of or within any series means the date
specified for that purpose as contemplated by Section 301, whether or not a
Business Day.

            "Repayment Date" means, when used with respect to any Security to be
repaid at the option of the Holder, the date fixed for such repayment by or
pursuant to this Indenture.

            "Repayment Price" means, when used with respect to any Security to
be repaid at the option of the Holder, the price at which it is to be repaid by
or pursuant to this Indenture.

            "Responsible Officer" shall mean, when used with respect to the
Trustee, any officer within the corporate trust department of the Trustee,
including any vice president, assistant vice president, assistant secretary,
assistant treasurer, trust officer or any other officer of the Trustee who
customarily performs functions similar to those performed by the Persons who at
the time shall be such officers, respectively, or to whom any corporate trust
matter is referred because of such person's knowledge of and familiarity with
the particular subject and who shall have direct responsibility for the
administration of this Indenture.

                                       8
<PAGE>   16

            "Security" or "Securities" has the meaning stated in the first
recital of this Indenture and, more particularly, means any Security or
Securities authenticated and delivered under this Indenture; provided, however,
that, if at any time there is more than one Person acting as Trustee under this
Indenture, "Securities" with respect to the Indenture as to which such Person is
Trustee shall have the meaning stated in the first recital of this Indenture and
shall more particularly mean Securities authenticated and delivered under this
Indenture, exclusive, however, of Securities of any series as to which such
Person is not Trustee. Where applicable, references in this Indenture to
"Security" or "Securities" in respect of which Subsidiary Guarantees have been
issued and are Outstanding will include such Subsidiary Guarantees.

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

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

            "Stated Maturity", when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security or a coupon representing such installment of interest as the
fixed date on which the principal of such Security or such installment of
principal or interest is due and payable, as such date may be extended pursuant
to the provisions of Section 308.

            "Subsidiary" means any corporation a majority of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries of the Company. For the purposes of this definition,
"voting stock" means stock having voting power for the election of directors,
managers or trustees of any Person (whether or not, at the time, stock of any
other class or classes shall have, or might have, voting power by reason of the
happening of any contingency).

            "Subsidiary Guarantees" means, with respect to the Securities of any
series, the guarantees with respect to the Securities of such Series by a
Subsidiary Guarantor pursuant to Article Thirteen hereof or a supplemental
indenture thereto.

            "Subsidiary Guarantor" means, with respect to the Securities of any
series, Quest Diagnostics Holdings Incorporated, Quest Diagnostics Clinical
Laboratories, Inc., Quest Diagnostics Incorporated (CA), Quest Diagnostics
Incorporated (MD), Quest Diagnostics LLC, Quest Diagnostics Incorporated (MI),
Quest Diagnostics Incorporated (CT), Quest Diagnostics Incorporated (MA), Quest
Diagnostics of Pennsylvania Inc., Quest Diagnostics Incorporated (OH), Metwest
Inc., Nichols Institute Diagnostics, DPD Holdings, Inc., Diagnostics Reference
Services Inc., Laboratory Holdings Incorporated, Quest Diagnostics Finance
Incorporated, Quest Diagnostics Investments Incorporated, Pathology Building
Partnership and any other Subsidiary of the Company that provides a Subsidiary
Guarantee with respect to the Securities of such series pursuant to a
supplemental indenture thereto.

            "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939
as in force at the date as of which this Indenture was executed, except as
provided in Section 905.

                                       9
<PAGE>   17

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

            "United States" means, unless otherwise specified with respect to
any Securities pursuant to Section 301, the United States of America (including
the states and the District of Columbia), its territories, its possessions and
other areas subject to its jurisdiction.

            "United States Person" means, unless otherwise specified with
respect to any Securities pursuant to Section 301, an individual who is a
citizen or resident of the United States, a corporation, partnership or other
entity created or organized in or under the laws of the United States or an
estate or trust the income of which is subject to United States federal income
taxation regardless of its source.

            "Valuation Date" has the meaning specified in Section 312(c).

            "Yield to Maturity" means the yield to maturity, computed at the
time of issuance of a Security (or, if applicable, at the most recent
redetermination of interest on such Security) and as set forth in such Security
in accordance with generally accepted United States bond yield computation
principles.

            SECTION 102 Compliance Certificates and Opinions.

            Upon any application or request by the Company or any Subsidiary
Guarantor to the Trustee to take any action under any provision of this
Indenture, the Company or such Subsidiary Guarantor, as the case may be, shall
furnish to the Trustee an Officers' Certificate stating that all conditions
precedent, if any, provided for in this Indenture relating to the proposed
action have been complied with and an Opinion of Counsel stating that in the
opinion of such counsel all such conditions precedent, 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 (other than pursuant to
Section 1005) shall include:

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

            (2) 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;

                                       10
<PAGE>   18

            (3) a statement that, in the opinion of each such individual, he has
      made such examination or investigation as is necessary to enable him to
      express an informed opinion as to whether or not such condition or
      covenant has been complied with; and

            (4) a statement as to whether, in the opinion of each such
      individual, 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 as 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 or any
Subsidiary Guarantor may be based, insofar as it relates to legal matters, upon
an Opinion of Counsel, or a certificate or representations by counsel, unless
such officer knows, or in the exercise of reasonable care should know, that the
opinion, certificate or representations with respect to the matters upon which
his certificate or opinion is based are erroneous. Any such Opinion of Counsel
or certificate or representations 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 or such Subsidiary Guarantor, as the case may be,
stating that the information as to such factual matters is in the possession of
the Company or such Subsidiary Guarantor, as the case may be, unless such
counsel knows, or in the exercise of reasonable care should know, that the
certificate or opinion or representations as 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.

            SECTION 104 Acts of Holders.

            (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of the Outstanding Securities of all series or one or more series, as
the case may be, may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed (which may be electronically signed) by such
Holders in person or by agents duly appointed in writing. If Securities of a
series are issuable as Bearer Securities, any request, demand, authorization,
direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders of Securities of such series may, alternatively, be
embodied in and evidenced by the record of Holders of Securities of such series
voting in favor thereof, either in person or by proxies duly appointed in
writing, at any meeting of Holders of Securities of such series duly called and
held in accordance with the provisions of Article Fifteen, 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

                                       11
<PAGE>   19

Trustee and, where it is hereby expressly required, to the Company or the
Subsidiary Guarantors or to all of them. 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 or 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
conclusive in favor of the Trustee and the Company and any agent of the Trustee
or the Company, if made in the manner provided in this Section. The record of
any meeting of Holders of Securities shall be proved in the manner provided in
Section 1506.

            (b) The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may be proved in any
manner which the Trustee deems reasonably sufficient.

            (c) The ownership of Registered Securities shall be proved by the
Security Register.

            (d) The ownership of Bearer Securities may be proved by the
production of such Bearer Securities or by a certificate executed, as
depositary, by any trust company, bank, banker or other depositary, wherever
situated, if such certificate shall be deemed by the Trustee to be satisfactory,
showing that at the date therein mentioned such Person had on deposit with such
depositary, or exhibited to it, the Bearer Securities therein described; or such
facts may be proved by the certificate or affidavit of the Person holding such
Bearer Securities, if such certificate or affidavit is deemed by the Trustee to
be satisfactory. The Trustee, the Company and the Subsidiary Guarantors may
assume that such ownership of any Bearer Security continues until (1) another
certificate or affidavit bearing a later date issued in respect of the same
Bearer Security is produced, or (2) such Bearer Security is produced to the
Trustee by some other Person, or (3) such Bearer Security is surrendered in
exchange for a Registered Security, or (4) such Bearer Security is no longer
Outstanding. The ownership of Bearer Securities may also be proved in any other
manner that the Trustee deems sufficient.

            (e) If the Company or any Subsidiary Guarantor shall solicit from
the Holders of Registered Securities any request, demand, authorization,
direction, notice, consent, waiver or other Act, the Company or such Subsidiary
Guarantor, as the case may be, may, at its option, in or pursuant to a Board
Resolution, 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 or such Subsidiary Guarantor, as
the case may be, shall have no obligation to do so. Notwithstanding TIA Section
316(c), such record date shall be the record date specified in or pursuant to
such Board Resolution, which shall be a date not earlier than the date 30 days
prior to the first solicitation of Holders generally in connection therewith and
not later than the date such solicitation is completed. 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 such record date shall be deemed to be
Holders for the purposes of determining whether Holders of the requisite
proportion of 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
such record date; provided that no such

                                       12
<PAGE>   20

authorization, agreement or consent by the Holders on such record date shall be
deemed effective unless it shall become effective pursuant to the provisions of
this Indenture not later than 180 days after the record date.

            (f) Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security 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, any
Security Registrar, any Paying Agent, any Authenticating Agent, the Company or
any Subsidiary Guarantor in reliance thereon, whether or not notation of such
action is made upon such Security.

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

            Any request, demand, authorization, direction, notice, consent,
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, (1) the Trustee
by any Holder or by the Company or any Subsidiary Guarantor shall be sufficient
for every purpose hereunder if made, given, furnished or filed in writing to or
with the Trustee at its Corporate Trust Office, Attention: Corporate Trust
Administration, or at any other address previously furnished in writing by the
Trustee to the Holders or the Company or such Subsidiary Guarantor or (2) the
Company or any Subsidiary Guarantor by the Trustee or by any Holder shall be
sufficient for every purpose hereunder (unless otherwise herein expressly
provided) if in writing and mailed, given, furnished or filed with or to the
Company or such Subsidiary Guarantor addressed to it at the address of the
Company's principal office specified in the first paragraph of this Indenture or
at any other address previously furnished in writing to the Trustee by the
Company or such Subsidiary Guarantor.

            SECTION 106 Notice to Holders; Waiver.

            Where this Indenture provides for notice of any event to Holders of
Registered Securities by the Company, the Subsidiary Guarantors or the Trustee,
such notice shall be sufficiently given (unless otherwise herein expressly
provided) if in writing and mailed, first-class postage prepaid, or by email, to
each such Holder affected by such event, at his physical address or email
address as such address appears in the Security Register, not later than the
latest date, and not earlier than the earliest date, prescribed for the giving
of such notice. In any case where notice to Holders of Registered Securities 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 of Registered Securities or the sufficiency
of any notice to Holders of Bearer Securities given as provided herein. Any
notice mailed to a Holder in the manner herein prescribed shall be conclusively
deemed to have been received by such Holder, whether or not such Holder actually
receives such notice.

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

                                       13
<PAGE>   21

            Except as otherwise expressly provided herein or otherwise specified
with respect to any Securities pursuant to Section 301, where this Indenture
provides for notice to Holders of Bearer Securities of any event, such notice
shall be sufficiently given if published in (1)an Authorized Newspaper in The
City of New York and in such other city or cities as may be specified in such
Securities on a Business Day, or (2) an electronic medium easily accessible by
the Holders as may be specified to such Holders, such publication to be not
later than the latest date, and not earlier than the earliest date, prescribed
for the giving of such notice. Any such notice shall be deemed to have been
given on the date of such publication or, if published more than once, on the
date of the first such publication.

            If by reason of the suspension of publication of any Authorized
Newspaper or Authorized Newspapers or by reason of any other cause it shall be
impracticable to publish any notice to Holders of Bearer Securities as provided
above, then such notification to Holders of Bearer Securities as shall be given
with the approval of the Trustee shall constitute sufficient notice to such
Holders for every purpose hereunder. Neither the failure to give notice by
publication to Holders of Bearer Securities as provided above, nor any defect in
any notice so published, shall affect the sufficiency of such notice with
respect to other Holders of Bearer Securities or the sufficiency of any notice
to Holders of Registered Securities given as provided herein.

            Any request, demand, authorization, direction, notice, consent or
waiver required or permitted under this Indenture shall be in the English
language, except that any published notice may be in an official language of the
country of publication.

            Where this Indenture provides for notice in any manner, such notice
may be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice. Waivers of notice by Holders shall be filed with the Trustee, but such
filing shall not be a condition precedent to the validity of any action taken in
reliance upon such waiver.

            SECTION 107 Effect of Headings and Table of Contents.

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

            SECTION 108 Successors and Assigns.

            All covenants and agreements in this Indenture by the Company or any
Subsidiary Guarantor shall bind its successors and assigns, whether so expressed
or not.

            SECTION 109 Separability Clause.

            In case any provision in this Indenture or in any Security, any
Subsidiary Guarantee or coupon 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.

                                       14
<PAGE>   22

            SECTION 110 Benefits of Indenture.

            Nothing in this Indenture or in the Securities, the Subsidiary
Guarantees or coupons, express or implied, shall give to any Person, other than
the parties hereto, any Security Registrar, any Paying Agent, any Authenticating
Agent and their successors hereunder and the Holders any benefit or any legal or
equitable right, remedy or claim under this Indenture.

            SECTION 111 Governing Law.

            This Indenture, the Securities, the Subsidiary Guarantees and
coupons shall be governed by and construed in accordance with the laws of the
State of New York, without regard to principles of conflicts of laws. This
Indenture is subject to the provisions of the Trust Indenture Act that are
required to be part of this Indenture and shall, to the extent applicable, be
governed by such provisions.

            SECTION 112 Legal Holidays.

            In any case where any Interest Payment Date, Redemption Date,
Repayment Date, sinking fund payment date, Stated Maturity or Maturity of any
Security shall not be a Business Day at any Place of Payment, then
(notwithstanding any other provision of this Indenture or any Security or coupon
other than a provision in the Securities of any series which specifically states
that such provision shall apply in lieu of this Section), payment of principal
(or premium, if any) or interest, 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 with the same force and effect as if made on the Interest
Payment Date, Redemption Date, Repayment Date or sinking fund payment date, or
at the Stated Maturity or Maturity; provided that no interest shall accrue on
the amount so payable for the period from and after such Interest Payment Date,
Redemption Date, Repayment Date, sinking fund payment date, Stated Maturity or
Maturity, as the case may be.

            SECTION 113 Conflict of Any Provision of Indenture with Trust
Indenture Act.

            If and to the extent that any provision of this Indenture limits,
qualifies or conflicts with the duties imposed by TIA Sections 310 to 318,
inclusive, or conflicts with any provision (an "incorporated provision")
required by or deemed to be included in this Indenture by operation of such TIA
Sections or any section of the TIA, such imposed duties or incorporated
provisions shall control. If any provision of this Indenture modifies or
excludes any provision of the TIA that may be so modified or excluded, the
latter provision shall be deemed to apply to this Indenture as so modified or
excluded, as the case may be.

            SECTION 114 No Recourse against Others.

            A director, officer, employee or stockholder, as such, of the
Company or any Subsidiary Guarantor shall not have any liability for any
obligations of the Company or such Subsidiary Guarantor under the Securities,
the Subsidiary Guarantees, if any, or this Indenture or for any claim based on,
in respect of or by reason of such obligations or their creation. Each Holder by
accepting any of the Securities and the Subsidiary Guarantees waives and
releases all such liability.

                                       15
<PAGE>   23

            SECTION 115 Waiver of Trial by Jury.

            The Company, the Subsidiary Guarantors, the Trustee, and Holders
hereby irrevocably and unconditionally waive the right to trial by jury in
connection with any claim arising out of or relating to the Securities and under
this Indenture.

                                   ARTICLE TWO

                                SECURITIES FORMS

            SECTION 201 Forms of Securities.

            The Registered Securities, if any, of each series, the Bearer
Securities, if any, of each series and related coupons shall be in substantially
the forms as shall be established in one or more indentures supplemental hereto
or approved from time to time by or pursuant to a Board Resolution in accordance
with Section 301, shall have such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by this
Indenture or any indenture supplemental hereto, and may have such letters,
numbers or other marks of identification or designation and such legends or
endorsements placed thereon as the Company or the Subsidiary Guarantors, as the
case may be, may deem appropriate and as are not inconsistent with the
provisions of this Indenture, or as may be required to comply with any law or
with any rule or regulation made pursuant thereto or with any rule or regulation
of any stock exchange on which the Securities may be listed, or to conform to
usage.

            Unless otherwise specified as contemplated by Section 301, Bearer
Securities shall have interest coupons attached.

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

                                       16
<PAGE>   24

            SECTION 202 Form of Trustee's Certificate of Authentication.

            Subject to Section 611, the Trustee's certificate of authentication
shall be in substantially the following form:

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

                        THE BANK OF NEW YORK
                        as Trustee

                        By___________________________
                        Authorized Signatory

            SECTION 203 Securities Issuable in Global Form.

            If Securities of or within a series are issuable in global form, as
specified as contemplated by Section 301, then, notwithstanding clause (8) of
Section 301 and the provisions of Section 302, any such Security shall represent
such of the Outstanding Securities of such series as shall be specified therein
and may provide that it shall represent the aggregate amount of Outstanding
Securities of such series from time to time endorsed thereon and that the
aggregate amount of Outstanding Securities of such series represented thereby
may from time to time be increased or decreased to reflect exchanges. Any
endorsement of a Security in global form to reflect the amount, or any increase
or decrease in the amount, of Outstanding Securities represented thereby shall
be made by the Trustee in such manner and upon instructions given by such Person
or Persons as shall be specified therein or in the Company Order to be delivered
to the Trustee pursuant to Section 303 or 304. Subject to the provisions of
Section 303 and, if applicable, Section 304, the Trustee shall deliver and
redeliver any Security in permanent global form in the manner and upon
instructions given by the Person or Persons specified therein or in the
applicable Company Order. If a Company Order pursuant to Section 303 or 304 has
been, or simultaneously is, delivered, any instructions by the Company with
respect to endorsement, delivery or redelivery of a Security in global form
shall be in writing but need not comply with Section 102 and need not be
accompanied by an Opinion of Counsel.

            The provisions of the last sentence of Section 303 shall apply to
any Security represented by a Security in global form if such Security was never
issued and sold by the Company and the Company delivers to the Trustee the
Security in global form together with written instructions (which need not
comply with Section 102 and need not be accompanied by an Opinion of Counsel)
with regard to the reduction in the principal amount of Securities represented
thereby, together with the written statement contemplated by the last sentence
of Section 303.

            Notwithstanding the provisions of Section 307, unless otherwise
specified as contemplated by Section 301, payment of principal of (and premium,
if any) and interest, if any, on any Security in permanent global form shall be
made to the Person or Persons specified therein.

                                       17
<PAGE>   25

            Notwithstanding the provisions of Section 309 and except as provided
in the preceding paragraph, the Company, the Subsidiary Guarantors, the Trustee
and any agent of the Company, the Subsidiary Guarantors and the Trustee shall
treat as the Holder of such principal amount of Outstanding Securities
represented by a permanent global Security (i) in the case of a permanent global
Security in registered form, the Holder of such permanent global Security in
registered form, or (ii) in the case of a permanent global Security in bearer
form, Euroclear or Clearstream.

            SECTION 204 Form of Legend for Book-Entry Securities.

            Any Global Security authenticated and delivered hereunder shall bear
a legend (which would be in addition to any other legends required in the case
of a restricted Security) in substantially the following form:

            THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE
      INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A
      DEPOSITORY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN
      WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS
      SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON
      OTHER THAN SUCH DEPOSITORY OR ITS NOMINEE EXCEPT IN THE LIMITED
      CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

            UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
      OF THE DEPOSITARY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR
      REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND SUCH CERTIFICATE ISSUED
      IN EXCHANGE FOR THIS CERTIFICATE IS REGISTERED IN THE NAME OF CEDE & CO.,
      OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE
      DEPOSITORY, ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
      OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, SINCE THE REGISTERED OWNER
      HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                                  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.

            The Securities shall rank equally and pari passu and may be issued
in one or more series. There shall be established in one or more Board
Resolutions or pursuant to authority granted by one or more Board Resolutions
and, subject to Section 303, set forth, or determined in the manner provided, in
an Officers' Certificate, or established in one or more indentures supplemental
hereto, prior to the issuance of Securities of any series, any or all of the
following,

                                       18
<PAGE>   26

as applicable (each of which (except for the matters set forth in clauses (1),
(2) and (15) below), if so provided, may be determined from time to time by the
Company with respect to unissued Securities of the series when issued from time
to time):

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

            (2) any limit upon the aggregate principal amount of the Securities
      of the series that may be authenticated and delivered under this Indenture
      (except for Securities authenticated and delivered upon registration of
      transfer of, or in exchange for, or in lieu of, other Securities of the
      series pursuant to Section 304, 305, 306, 906, 1107 or 1305) and whether
      any series may be reopened for additional Securities of that series; in
      the event that such series of Securities may be reopened from time to time
      for issuances of additional Securities of such series, the terms thereof
      shall indicate whether any such additional Securities shall have the same
      terms as the prior Securities of such series or whether the Company may
      establish additional or different terms with respect to such additional
      Securities;

            (3) the date or dates, or the method by which such date or dates
      will be determined or extended, on which the principal (and premium, if
      any,) of the Securities of the series shall be payable;

            (4) the rate or rates at which the Securities of the series shall
      bear interest, if any, or the method by which such rate or rates shall be
      determined, the date or dates from which such interest shall accrue or the
      method by which such date or dates shall be determined, the Interest
      Payment Dates on which such interest will be payable and the Regular
      Record Date, if any, for the interest payable on any Registered Security
      on any Interest Payment Date, or the method by which such date shall be
      determined, and the basis upon which such interest shall be calculated if
      other than that of a 360-day year of twelve 30-day months;

            (5) the place or places, if any, other than or in addition to the
      Borough of Manhattan, The City of New York, where the principal of (and
      premium, if any) and interest, if any, on Securities of the series shall
      be payable, any Registered Securities of the series may be surrendered for
      registration of transfer and exchange, Securities of the series may be
      surrendered for exchange, where Securities of that series that are
      convertible or exchangeable may be surrendered for conversion or exchange,
      as applicable, and where notices or demands to or upon the Company or, if
      applicable, the Subsidiary Guarantors in respect of the Securities of the
      series and this Indenture may be served;

            (6) the period or periods within which, or the date or dates on
      which, the price or prices at which, the Currency or Currencies in which,
      and other terms and conditions upon which Securities of the series may be
      redeemed, in whole or in part, at the option of the Company, if the
      Company is to have the option;

                                       19
<PAGE>   27

            (7) the obligation, if any, of the Company to redeem, repay or
      purchase Securities of the series pursuant to any sinking fund or
      analogous provision 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, the Currency or Currencies in which, and other terms and
      conditions upon which Securities of the series shall be redeemed, repaid
      or purchased, in whole or in part, pursuant to such obligation;

            (8) if other than denominations of $1,000 and any integral multiple
      thereof, the denomination or denominations in which any Registered
      Securities of the series shall be issuable and, if other than
      denominations of $5,000, the denomination or denominations in which any
      Bearer Securities of the series shall be issuable;

            (9) if other than the Trustee, the identity of each Security
      Registrar and/or Paying Agent;

            (10) if other than the principal amount thereof, the portion of the
      principal amount of Securities of the series that shall be payable upon
      declaration of acceleration of the Maturity thereof pursuant to Section
      502 or the method by which such portion shall be determined;

            (11) if other than Dollars, the Currency or Currencies in which
      payment of the principal of (or premium, if any) or interest, if any, on
      the Securities of the series shall be made or in which the Securities of
      the series shall be denominated and the particular provisions applicable
      thereto in accordance with, in addition to or in lieu of any of the
      provisions of Section 312;

            (12) whether the amount of payments of principal of (or premium, if
      any) or interest, if any, on the Securities of the series may be
      determined with reference to an index, formula or other method (which
      index, formula or method may be based, without limitation, on one or more
      Currencies, commodities, equity indices or other indices), and the manner
      in which such amounts shall be determined;

            (13) whether the principal of (or premium, if any) or interest, if
      any, on the Securities of the series are to be payable, at the election of
      the Company or a Holder thereof, in one or more Currencies other than that
      in which such Securities are denominated or stated to be payable, the
      period or periods within which (including the Election Date), and the
      terms and conditions upon which, such election may be made, and the time
      and manner of determining the exchange rate between the Currency or
      Currencies in which such Securities are denominated or stated to be
      payable and the Currency or Currencies in which such Securities are to be
      paid, in each case in accordance with, in addition to or in lieu of any of
      the provisions of Section 312;

            (14) provisions, if any, granting special rights to the Holders of
      Securities of the series upon the occurrence of such events as may be
      specified;

            (15) any deletions from, modifications of or additions to the Events
      of Default or covenants or other provisions (including any deletions from,
      modifications of or additions to any of the provisions of Section 1007) of
      the Company with respect to

                                       20
<PAGE>   28

      Securities of the series, whether or not such Events of Default or
      covenants or other provisions are consistent with the Events of Default or
      covenants or other provisions set forth herein;

            (16) whether Securities of the series are to be issuable as
      Registered Securities, Bearer Securities or both, any restrictions
      applicable to the offer, sale or delivery of Bearer Securities and the
      terms upon which Bearer Securities of the series may be exchanged for
      Registered Securities of the series and vice versa (if permitted by
      applicable laws and regulations), whether any Securities of the series are
      to be issuable initially in temporary global form and whether any
      Securities of the series are to be issuable in permanent global form with
      or without coupons and, if so, whether beneficial owners of interests in
      any such permanent global Security may exchange such interests for
      Securities of such series in certificated form and of like tenor of any
      authorized form and denomination and the circumstances under which any
      such exchanges may occur, if other than in the manner provided in Section
      305, and, if Registered Securities of the series are to be issuable as a
      global Security, the identity of the depository for such series;

            (17) the date as of which any Bearer Securities of the series and
      any temporary global Security representing Outstanding Securities of the
      series shall be dated if other than the date of original issuance of the
      first Security of the series to be issued;

            (18) the Person to whom any interest on any Registered Security of
      the series shall be payable, if other than the Person in whose name such
      Security (or one or more Predecessor Securities) is registered at the
      close of business on the Regular Record Date for such interest, the manner
      in which, or the Person to whom, any interest on any Bearer Security of
      the series shall be payable, if otherwise than upon presentation and
      surrender of the coupons appertaining thereto as they severally mature,
      and the extent to which, or the manner in which, any interest payable on a
      temporary global Security on an Interest Payment Date will be paid if
      other than in the manner provided in Section 304;

            (19) the applicability, if any, of Sections 1402 and 1403 to the
      Securities of the series (and, in the case of Section 1403, if applicable,
      any additional covenants subject to covenant defeasance) and any
      provisions in modification of, in addition to or in lieu of any of the
      provisions of Article Fourteen;

            (20) if the Securities of such series are to be issuable in
      definitive form (whether upon original issue or upon exchange of a
      temporary Security of such series) only upon receipt of certain
      certificates or other documents or satisfaction of other conditions, then
      the form and/or terms of such certificates, documents or conditions;

            (21) whether, under what circumstances and the Currency in which,
      the Company will pay Additional Amounts as contemplated by Section 1005 on
      the Securities of the series to any Holder who is not a United States
      person (including any modification to the definition of such term) in
      respect of any tax, assessment or governmental charge and, if so, whether
      the Company will have the option to redeem such Securities rather than pay
      such Additional Amounts (and the terms of any such option);

                                       21
<PAGE>   29

            (22) the designation of the initial Exchange Rate Agent, if any;

            (23) if the Securities of the series are to be convertible into or
      exchangeable for any securities of any Person (including the Company), the
      terms and conditions upon which such Securities of the series will be so
      convertible or exchangeable (including, without limitation, the initial
      conversion price or rate, the conversion period, the conversion agent, if
      any, adjustments of the applicable conversion price or rate and any
      requirements with respect to the reservation of shares or Securities for
      purposes of conversion);

            (24) whether payment of any amounts due hereunder will be guaranteed
      by one or more guarantors, including subsidiaries of the Company; and

            (25) any other terms of the series (which terms shall not be
      inconsistent with the requirements of the TIA).

            All Securities of any one series and the coupons appertaining to any
Bearer Securities of such series shall be substantially identical except, in the
case of Registered Securities, as to denomination and except as may otherwise be
provided in or pursuant to such Board Resolution (subject to Section 303) and
set forth in such Officers' Certificate or in any such indenture supplemental
hereto. All Securities of any one series need not be issued at the same time
and, unless otherwise provided, a series may be reopened, without the consent of
the Holders, for issuances of additional Securities of such series or to
establish additional terms of such series of Securities (which additional terms
shall only be applicable to unissued or additional Securities of such series).

            If any of the terms of the Securities of any series are established
by action taken pursuant to one or more Board Resolutions, a copy of an
appropriate record of such action(s) shall be certified by the Secretary or an
Assistant Secretary of the Company and delivered to the Trustee at or prior to
the delivery of the Officers' Certificate setting forth the terms of the
Securities of such series.

            SECTION 302 Denominations.

            The Securities of each series shall be issuable in such
denominations as shall be specified as contemplated by Section 301. In the
absence of any such provision with respect to Securities of any series, the
principal, premium and interest and Additional Amounts with respect to the
Securities shall be payable in Dollars. With respect to Securities of any series
denominated in Dollars, in the absence of any such provisions with respect to
the Securities of any series, the Registered Securities of such series, other
than Registered Securities issued in global form (which may be of any
denomination) shall be issuable in denominations of $1,000 and any integral
multiple thereof, and the Bearer Securities of such series, other than Bearer
Securities issued in global form (which may be of any denomination), shall be
issuable in a denomination of $5,000.

                                       22
<PAGE>   30

            SECTION 303 Execution, Authentication, Delivery and Dating.

            The Securities and any coupons appertaining thereto shall be
executed on behalf of the Company by its Chairman, its President or one of its
Vice Presidents, under its corporate seal reproduced thereon or a facsimile or
copy thereof and attested by its Secretary or one of its Assistant Secretaries.
The signature of any of these officers on the Securities and coupons may be
manual or facsimile signatures of the present or any future such authorized
officer and may be imprinted or otherwise reproduced on the Securities.

            Securities or coupons bearing the manual or facsimile signatures of
individuals who were at any time the proper officers 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 or coupons.

            At any time and from time to time after the execution and delivery
of this Indenture, the Company may deliver Securities of any series, together
with any coupon appertaining thereto, executed by the Company, to the Trustee
for authentication, together with a Company Order for the authentication and
delivery of such Securities, and the Trustee in accordance with the Company
Order shall authenticate and deliver such Securities; either to the Company or
according to the directions contained in the Company Order; provided, however,
that, in connection with its original issuance, no Bearer Security shall be
mailed or otherwise delivered to any location in the United States; and provided
further that, unless otherwise specified with respect to any series of
Securities pursuant to Section 301, a Bearer Security may be delivered in
connection with its original issuance only if the Person entitled to receive
such Bearer Security shall have furnished a certificate in the form set forth in
Exhibit A-1 to this Indenture or such other certificate as may be specified with
respect to any series of Securities pursuant to Section 301, dated no earlier
than 15 days prior to the earlier of the date on which such Bearer Security is
delivered and the date on which any temporary Security first becomes
exchangeable for such Bearer Security in accordance with the terms of such
temporary Security and this Indenture. If any Security shall be represented by a
permanent global Bearer Security, then, for purposes of this Section and Section
304, the notation of a beneficial owner's interest therein upon original
issuance of such Security or upon exchange of a portion of a temporary global
Security shall be deemed to be delivery in connection with its original issuance
of such beneficial owner's interest in such permanent global Security. Except as
permitted by Section 306, the Trustee shall not authenticate and deliver any
Bearer Security unless all appurtenant coupons for interest then matured have
been detached and cancelled. If all the Securities of any series are not to be
issued at one time and if the Board Resolution or supplemental indenture
establishing such series shall so permit, such Company Order may set forth
procedures acceptable to the Trustee for the issuance of such Securities and
determining the terms of particular Securities of such series, such as interest
rate, maturity date, date of issuance and date from which interest shall accrue.
In authenticating such Securities, and accepting the additional responsibilities
under this Indenture in relation to such Securities, the Trustee shall be
entitled to receive, and (subject to TIA Sections 315(a) through 315(d)) shall
be fully protected in relying upon,

            (A) an Opinion of Counsel stating,

                                       23
<PAGE>   31

                  (a) that the form or forms of such Securities and any coupons
            have been established in conformity with the provisions of this
            Indenture;

                  (b) that the terms of such Securities and any coupons have
            been established in conformity with the provisions of this
            Indenture; and

                  (c) that such Securities, together with any coupons
            appertaining thereto, when completed by appropriate insertions and
            executed and delivered by the Company to the Trustee for
            authentication in accordance with this Indenture, authenticated and
            delivered by the Trustee in accordance with this Indenture and
            issued by the Company in the manner and subject to any conditions
            specified in such Opinion of Counsel, will constitute legal, valid
            and binding obligations of the Company, enforceable in accordance
            with their terms, subject to applicable bankruptcy, insolvency,
            reorganization and other similar laws of general applicability
            relating to or affecting the enforcement of creditors' rights, to
            general equitable principles and to such other qualifications as
            such counsel shall conclude do not materially affect the rights of
            Holders of such Securities and any coupons;

            (B) an Officers' Certificate stating, to the best of the knowledge
      of the signers of such certificate, that no Event of Default with respect
      to any of the Securities shall have occurred and be continuing; and

            (C) an executed supplemental indenture (if any).

            Notwithstanding the provisions of Section 301 and of this Section
303, if all the Securities of any series are not to be issued at one time, it
shall not be necessary to deliver an Officers' Certificate otherwise required
pursuant to Section 301 or the Company Order, Opinion of Counsel or Officers'
Certificate otherwise required pursuant to the preceding paragraph at the time
of issuance of each Security of such series, but such order, opinion and
certificates, with appropriate modifications to cover such future issuances,
shall be delivered at or before the time of issuance of the first Security of
such series.

            If such form or terms have been so established, the Trustee shall
not be required to authenticate such Securities if the issue of such Securities
pursuant to this Indenture will affect the Trustee's own rights, duties,
obligations or immunities under the Securities and this Indenture or otherwise
in a manner which is not reasonably acceptable to the Trustee. Notwithstanding
the generality of the foregoing, the Trustee will not be required to
authenticate Securities denominated in a Foreign Currency if the Trustee
reasonably believes that it would be unable to perform its duties with respect
to such Securities.

            Each Registered Security shall be dated the date of its
authentication and each Bearer Security shall be dated as of the date specified
as contemplated by Section 301.

            No Security or coupon shall be entitled to any benefit under this
Indenture or be valid or obligatory for any purpose unless there appears on such
Security or Security to which such coupon appertains a certificate of
authentication substantially in the form provided for herein duly executed by
the Trustee or an Authenticating Agent by manual signature of an

                                       24
<PAGE>   32

authorized signatory, 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 but never issued and sold by the Company, and the Company
shall deliver such Security to the Trustee for cancellation as provided in
Section 310 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 of this
Indenture.

            SECTION 304 Temporary Securities.

            (a) Pending the preparation of definitive Securities of any series,
the Company may execute, and upon Company Order the Trustee shall authenticate
and deliver, temporary 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, in registered form, or, if authorized, in bearer form with one or
more coupons or without coupons, and with such appropriate insertions,
omissions, substitutions and other variations as the officers executing such
Securities may determine, as conclusively evidenced by their execution of such
Securities. In the case of Securities of any series, such temporary Securities
may be in global form.

            Except in the case of temporary Securities in global form (which
shall be exchanged in accordance with Section 304(b) or as otherwise provided in
or pursuant to a Board Resolution), if temporary Securities of any series are
issued, the Company will cause definitive Securities of that series to be
prepared without unreasonable delay. After the preparation of definitive
Securities of such series, the temporary Securities of such series shall be
exchangeable for definitive Securities of such series upon surrender of the
temporary Securities of such series at the office or agency of the Company in a
Place of Payment for that series, without charge to the Holder. Upon surrender
for cancellation of any one or more temporary Securities of any series
(accompanied by any non-matured coupons appertaining thereto), the Company shall
execute and the Trustee shall authenticate and deliver in exchange therefor a
like principal amount of definitive Securities of the same series of authorized
denominations; provided, however, that no definitive Bearer Security shall be
delivered in exchange for a temporary Registered Security; and provided further
that a definitive Bearer Security shall be delivered in exchange for a temporary
Bearer Security only in compliance with the conditions set forth in Section 303.
Until so exchanged, the temporary Securities of any series shall in all respects
be entitled to the same benefits under this Indenture as definitive Securities
of such series.

            (b) Unless otherwise provided in or pursuant to a Board Resolution,
this Section 304(b) shall govern the exchange of temporary Securities issued in
global form. If temporary Securities of any series are issued in global form,
any such temporary global Security shall, unless otherwise provided therein, be
delivered to the London office of a depositary or common depositary (the "Common
Depositary"), for the benefit of Euroclear and Clearstream, for credit to the
respective accounts of the beneficial owners of such Securities (or to such
other accounts as they may direct).

                                       25
<PAGE>   33

            Without unnecessary delay but in any event not later than the date
specified in, or determined pursuant to the terms of, any such temporary global
Security (the "Exchange Date"), the Company shall deliver to the Trustee
definitive Securities, in aggregate principal amount equal to the principal
amount of such temporary global Security, executed by the Company. On or after
the Exchange Date, such temporary global Security shall be surrendered by the
Common Depositary to the Trustee, as the Company's agent for such purpose, to be
exchanged, in whole or from time to time in part, for definitive Securities
without charge, and the Trustee shall authenticate and deliver, in exchange for
each portion of such temporary global Security and upon receipt of the Company
Order described in Section 303, an equal aggregate principal amount of
definitive Securities of the same series of authorized denominations and of like
tenor as the portion of such temporary global Security to be exchanged. The
definitive Securities to be delivered in exchange for any such temporary global
Security shall be in bearer form, registered form, permanent global bearer form
or permanent global registered form, or any combination thereof, as specified as
contemplated by Section 301, and, if any combination thereof is so specified, as
requested by the beneficial owner thereof; provided, however, that, unless
otherwise specified in such temporary global Security, upon such presentation by
the Common Depositary, such temporary global Security is accompanied by a
certificate dated the Exchange Date or a subsequent date and signed by Euroclear
as to the portion of such temporary global Security held for its account then to
be exchanged and a certificate dated the Exchange Date or a subsequent date and
signed by Clearstream as to the portion of such temporary global Security held
for its account then to be exchanged, each in the form set forth in Exhibit A-2
to this Indenture or in such other form as may be established pursuant to
Section 301; and provided further that definitive Bearer Securities shall be
delivered in exchange for a portion of a temporary global Security only in
compliance with the requirements of Section 303.

            Unless otherwise specified in such temporary global Security, the
interest of a beneficial owner of Securities of a series in a temporary global
Security shall be exchanged for definitive Securities of the same series and of
like tenor following the Exchange Date when the account holder instructs
Euroclear or Clearstream, as the case may be, to request such exchange on his
behalf and delivers to Euroclear or Clearstream, as the case may be, a
certificate in the form set forth in Exhibit A-1 to this Indenture (or in such
other form as may be established pursuant to Section 301), dated no earlier than
15 days prior to the Exchange Date, copies of which certificate shall be
available from the offices of Euroclear and Clearstream, the Trustee, any
Authenticating Agent appointed for such series of Securities and each Paying
Agent. Unless otherwise specified in such temporary global Security, any such
exchange shall be made free of charge to the beneficial owners of such temporary
global Security, except that a Person receiving definitive Securities must bear
the cost of insurance, postage, transportation and the like unless such Person
takes delivery of such definitive Securities in person at the offices of
Euroclear or Clearstream. Definitive Securities in bearer form to be delivered
in exchange for any portion of a temporary global Security shall be delivered
only outside the United States.

            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, except that, unless otherwise
specified as contemplated by Section 301, interest payable on a temporary global
Security on an Interest Payment Date for Securities of such series occurring
prior to the applicable Exchange Date shall be payable to Euroclear and
Clearstream on such Interest

                                       26
<PAGE>   34

Payment Date upon delivery by Euroclear and Clearstream to the Trustee of a
certificate or certificates in the form set forth in Exhibit A-2 to this
Indenture (or in such other forms as may be established pursuant to Section
301), for credit without further interest on or after such Interest Payment Date
to the respective accounts of Persons who are the beneficial owners of such
temporary global Security on such Interest Payment Date and who have each
delivered to Euroclear or Clearstream, as the case may be, a certificate dated
no earlier than 15 days prior to the Interest Payment Date occurring prior to
such Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in
such other forms as may be established pursuant to Section 301). Notwithstanding
anything to the contrary herein contained, the certifications made pursuant to
this paragraph shall satisfy the certification requirements of the preceding two
paragraphs of this Section 304(b) and of the third paragraph of Section 303 of
this Indenture and the interests of the Persons who are the beneficial owners of
the temporary global Security with respect to which such certification was made
will be exchanged for definitive Securities of the same series and of like tenor
on the Exchange Date or the date of certification if such date occurs after the
Exchange Date, without further act or deed by such beneficial owners. Except as
otherwise provided in this paragraph, no payments of principal (or premium, if
any) or interest, if any, owing with respect to a beneficial interest in a
temporary global Security will be made unless and until such interest in such
temporary global Security shall have been exchanged for an interest in a
definitive Security. Any interest so received by Euroclear and Clearstream and
not paid as herein provided shall be returned to the Trustee prior to the
expiration of two years after such Interest Payment Date in order to be repaid
to the Company.

            SECTION 305 Registration, Registration of Transfer and Exchange.

            The Company shall cause to be kept at the Corporate Trust Office of
the Trustee or in any office or agency of the Company in a Place of Payment a
register for each series of Securities (the registers maintained in such office
or in any such office or agency of the Company in a Place of Payment being
herein sometimes referred to collectively as the "Security Register") in which,
subject to such reasonable regulations as it may prescribe, the Company shall
provide for the registration of Registered Securities and of transfers of
Registered Securities. The Security Register shall be in written form or any
other form capable of being converted into written form within a reasonable
time. The Trustee, at its Corporate Trust Office, is hereby initially appointed
"Security Registrar" for the purpose of registering Registered Securities and
transfers of Registered Securities on such Security Register as herein provided.
In the event that the Trustee shall cease to be Security Registrar, it shall
have the right to examine the Security Register at all reasonable times.

            Upon surrender for registration of transfer of any Registered
Security of any series at any office or agency of the Company in a Place of
Payment for that series, the Company shall execute, and the Trustee shall
authenticate and deliver, subject to the terms and conditions of this Article 3,
in the name of the designated transferee or transferees, one or more new
Registered Securities of the same series, of any authorized denominations and of
a like aggregate principal amount, bearing a number not contemporaneously
outstanding and containing identical terms and provisions.

            At the option of the Holder, Registered Securities of any series may
be exchanged for other Registered Securities of the same series, of any
authorized denomination or

                                       27
<PAGE>   35

denominations and of a like aggregate principal amount, containing identical
terms and provisions, upon surrender of the Registered Securities to be
exchanged at any such office or agency. Whenever any Registered Securities are
so surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Registered Securities which the Holder making the
exchange is entitled to receive. Unless otherwise specified with respect to any
series of Securities as contemplated by Section 301, Bearer Securities may not
be issued in exchange for Registered Securities.

            If (but only if) permitted by the applicable Board Resolution and
(subject to Section 303) set forth in the applicable Officers' Certificate, or
in any indenture supplemental hereto, delivered as contemplated by Section 301,
at the option of the Holder, Bearer Securities of any series may be exchanged
for Registered Securities of the same series of any authorized denominations and
of a like aggregate principal amount and tenor, upon surrender of the Bearer
Securities to be exchanged at any such office or agency, with all unmatured
coupons and all matured coupons in default thereto appertaining. If the Holder
of a Bearer Security is unable to produce any such unmatured coupon or coupons
or matured coupon or coupons in default, any such permitted exchange may be
effected if the Bearer Securities are accompanied by payment in funds acceptable
to the Company in an amount equal to the face amount of such missing coupon or
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there is furnished to them such security or indemnity
as they may require to save each of them and any Paying Agent harmless. If
thereafter the Holder of such Security shall surrender to any Paying Agent any
such missing coupon in respect of which such a payment shall have been made,
such Holder shall be entitled to receive the amount of such payment; provided,
however, that, except as otherwise provided in Section 1002, interest
represented by coupons shall be payable only upon presentation and surrender of
those coupons at an office or agency located outside the United States.
Notwithstanding the foregoing, in case a Bearer Security of any series is
surrendered at any such office or agency in a permitted exchange for a
Registered Security of the same series and like tenor after the close of
business at such office or agency on (i) any Regular Record Date and before the
opening of business at such office or agency on the relevant Interest Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer Security shall be surrendered without the coupon relating to such
Interest Payment Date or proposed date for payment, as the case may be, and
interest or Defaulted Interest, as the case may be, will not be payable on such
Interest Payment Date or proposed date for payment, as the case may be, in
respect of the Registered Security issued in exchange for such Bearer Security,
but will be payable only to the Holder of such coupon when due in accordance
with the provisions of this Indenture.

            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.

            Notwithstanding the foregoing, except as otherwise specified as
contemplated by Section 301, any permanent global Security shall be exchangeable
only as provided in this paragraph. If any beneficial owner of an interest in a
permanent global Security is entitled to exchange such interest for Securities
of such series and of like tenor and principal amount of another authorized form
and denomination, as specified as contemplated by Section 301 and

                                       28
<PAGE>   36

provided that any applicable notice provided in the permanent global Security
shall have been given, then without unnecessary delay but in any event not later
than the earliest date on which such interest may be so exchanged, the Company
shall deliver to the Trustee definitive Securities in aggregate principal amount
equal to the principal amount of such beneficial owner's interest in such
permanent global Security, executed by the Company. On or after the earliest
date on which such interests may be so exchanged, such permanent global Security
shall be surrendered by the Common Depositary or such other depositary as shall
be specified in the Company Order with respect thereto to the Trustee, as the
Company's agent for such purpose, to be exchanged, in whole or from time to time
in part, for definitive Securities without charge and the Trustee shall
authenticate and deliver, in exchange for each portion of such permanent global
Security, an equal aggregate principal amount of definitive Securities of the
same series of authorized denominations and of like tenor as the portion of such
permanent global Security to be exchanged which, unless the Securities of the
series are not issuable both as Bearer Securities and as Registered Securities,
as specified as contemplated by Section 301, shall be in the form of Bearer
Securities or Registered Securities, or any combination thereof, as shall be
specified by the beneficial owner thereof; provided, however, that no such
exchanges may occur during a period beginning at the opening of business 15 days
before any selection of Securities to be redeemed and ending on the relevant
Redemption Date if the Security for which exchange is requested may be among
those selected for redemption; and provided further that no Bearer Security
delivered in exchange for a portion of a permanent global Security shall be
mailed or otherwise delivered to any location in the United States. If a
Registered Security is issued in exchange for any portion of a permanent global
Security after the close of business at the office or agency where such exchange
occurs on (i) any Regular Record Date and before the opening of business at such
office or agency on the relevant Interest Payment Date, or (ii) any Special
Record Date and before the opening of business at such office or agency on the
related proposed date for payment of Defaulted Interest, interest or Defaulted
Interest, as the case may be, will not be payable on such Interest Payment Date
or proposed date for payment, as the case may be, in respect of such Registered
Security, but will be payable on such Interest Payment Date or proposed date for
payment, as the case may be, only to the Person to whom interest in respect of
such portion of such permanent global Security is payable in accordance with the
provisions of this Indenture.

            All Securities issued 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 Registered Security presented or surrendered for registration
of transfer or for exchange shall (if so required by the Company or the Security
Registrar) be duly endorsed, or be accompanied by a written instrument of
transfer in form satisfactory to the Company and the Security Registrar, duly
executed by the Holder thereof or his attorney duly authorized in writing.

            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

                                       29
<PAGE>   37

exchange of Securities, other than exchanges pursuant to Section 304, 906, 1107
or 1305 not involving any transfer.

            The Company shall not be required (i) to issue, register the
transfer of or exchange any Security if such Security may be among those
selected for redemption during a period beginning at the opening of business 15
days before selection of the Securities to be redeemed under Section 1103 and
ending at the close of business on (A) if such Securities are issuable only as
Registered Securities, the day of the mailing of the relevant notice of
redemption and (B) if such Securities are issuable as Bearer Securities, the day
of the first publication of the relevant notice of redemption or, if such
Securities are also issuable as Registered Securities and there is no
publication, the mailing of the relevant notice of redemption, or (ii) to
register the transfer of or exchange any Registered Security so selected for
redemption in whole or in part, except, in the case of any Registered Security
to be redeemed in part, the portion thereof not to be redeemed, or (iii) to
exchange any Bearer Security so selected for redemption except that such a
Bearer Security may be exchanged for a Registered Security of that series and
like tenor, provided that such Registered Security shall be simultaneously
surrendered for redemption, or (iv) to issue, register the transfer of or
exchange any Security which has been surrendered for repayment at the option of
the Holder, except the portion, if any, of such Security not to be so repaid.

            Each Holder of a Security agrees to indemnify the Company and the
Trustee against any liability that may result from the transfer, exchange or
assignment of such Holder's Security in violation of any provision of this
Indenture and/or applicable United States Federal or state securities law.

            The Trustee shall have no obligation or duty to monitor, determine
or inquire as to compliance with any restrictions on transfer imposed under this
Indenture or under applicable law with respect to any transfer of any interest
in any Security (including any transfers between or among Depository
Participants or beneficial owners of interests in any Global Security) other
than to require delivery of such certificates and other documentation or
evidence as are expressly required by, and to do so if and when expressly
required by, the terms of this Indenture, and to examine the same to determine
substantial compliance as to form with the express requirements hereof.

            SECTION 306 Mutilated, Destroyed, Lost and Stolen Securities.

            If any mutilated Security or a Security with a mutilated coupon
appertaining to it is surrendered to the Trustee or the Company, together with,
in proper cases, such security or indemnity as may be required by the Company or
the Trustee to save each of them or any agent of either of them harmless, the
Company shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of the same series and principal amount, containing
identical terms and provisions and bearing a number not contemporaneously
outstanding, with coupons corresponding to the coupons, if any, appertaining to
the surrendered Security.

            If there shall be delivered to the Company and to the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
or coupon, and (ii) such security or indemnity as may be required by them to
save each of them and any agent of either of them

                                       30
<PAGE>   38

harmless, then, in the absence of notice to the Company or the Trustee that such
Security or coupon has been acquired by a bona fide purchaser, the Company shall
execute and upon its request and according to its directions the Trustee shall
authenticate and deliver, in lieu of any such destroyed, lost or stolen Security
or in exchange for the Security to which a destroyed, lost or stolen coupon
appertains (with all appurtenant coupons not destroyed, lost or stolen), a new
Security of the same series and principal amount, containing identical terms and
provisions and bearing a number not contemporaneously outstanding, with coupons
corresponding to the coupons, if any, appertaining to such destroyed, lost or
stolen Security or to the Security to which such destroyed, lost or stolen
coupon appertains.

            Notwithstanding the provisions of the previous two paragraphs, in
case any such mutilated, destroyed, lost or stolen Security or coupon has become
or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, with coupons corresponding to the coupons, if
any, appertaining to such mutilated, destroyed, lost or stolen Security or to
the Security to which such mutilated, destroyed, lost or stolen coupon
appertains, pay such Security or coupon; provided, however, that payment of
principal of (and premium, if any) and interest, if any, on Bearer Securities
shall, except as otherwise provided in Section 1002, be payable only at an
office or agency located outside the United States and, unless otherwise
specified as contemplated by Section 301, any interest on Bearer Securities
shall be payable only upon presentation and surrender of the coupons
appertaining thereto.

            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
expenses (including the fees and expenses of the Trustee) connected therewith.

            Every new Security of any series, together with its coupons, if any,
issued pursuant to this Section in lieu of any destroyed, lost or stolen
Security, or in exchange for a Security to which a destroyed, lost or stolen
coupon appertains, shall constitute an original additional contractual
obligation of the Company, whether or not the destroyed, lost or stolen Security
and its coupons, if any, or the destroyed, lost or stolen coupon shall be at any
time enforceable by anyone, and shall be entitled to all the benefits of this
Indenture equally and proportionately with any and all other Securities of that
series and their coupons, if any, 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 or coupons.

            SECTION 307 Payment of Interest; Interest Rights Preserved; Optional
Interest Reset.

            (a) Except as otherwise specified with respect to a series of
Securities in accordance with the provisions of Section 301, interest, if any,
on any Registered Security that 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 at the office or
agency of the

                                       31
<PAGE>   39

Company maintained for such purpose pursuant to Section 1002; provided, however,
that each installment of interest, if any, on any Registered Security may at the
Company's option be paid by (i) mailing a check for such interest, payable to or
upon the written order of the Person entitled thereto pursuant to Section 309,
to the address of such Person as it appears on the Security Register or (ii)
transfer to an account maintained by the payee inside the United States.

            Unless otherwise provided as contemplated by Section 301 with
respect to the Securities of any series, payment of interest, if any, may be
made, in the case of a Bearer Security, by transfer to an account maintained by
the payee with a bank located outside the United States.

            Unless otherwise provided as contemplated by Section 301, every
permanent global Security will provide that interest, if any, payable on any
Interest Payment Date will be paid to each of Euroclear and Clearstream with
respect to that portion of such permanent global Security held for its account
by the Common Depositary, for the purpose of permitting each of Euroclear and
Clearstream to credit the interest, if any, received by it in respect of such
permanent global Security to the accounts of the beneficial owners thereof.

            In case a Bearer Security of any series is surrendered in exchange
for a Registered Security of such series after the close of business (at an
office or agency in a Place of Payment for such series) on any Regular Record
Date and before the opening of business (at such office or agency) on the next
succeeding Interest Payment Date, such Bearer Security shall be surrendered
without the coupon relating to such Interest Payment Date and interest will not
be payable on such Interest Payment Date in respect of the Registered Security
issued in exchange for such Bearer Security, but will be payable only to the
Holder of such coupon when due in accordance with the provisions of this
Indenture.

            Except as otherwise specified with respect to a series of Securities
in accordance with the provisions of Section 301, any interest on any Registered
Security of any series that 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 registered Holder thereof on the
relevant 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 (1) or (2) below:

            (1) The Company may elect to make payment of any Defaulted Interest
      to the Persons in whose names the Registered Securities of such series (or
      their respective Predecessor Securities) are registered at the close of
      business on 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 Registered Security of such series and the date of the
      proposed payment (which shall not be less than 20 days after such notice
      is received by the Trustee), and at the same time the Company shall
      deposit with the Trustee an amount of money in the Currency in which the
      Securities of such series are payable (except as otherwise specified
      pursuant to Section 301 for the Securities of such series and except, if
      applicable, as provided in Sections 312(b), 312(d) and 312(e)) equal to
      the aggregate amount proposed to be paid in respect of such Defaulted
      Interest or shall make

                                       32
<PAGE>   40

      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 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 Registered Securities of
      such series at his address 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 mailed as aforesaid, such Defaulted Interest shall be paid to
      the Persons in whose names the Registered Securities of such series (or
      their respective Predecessor Securities) are registered at the close of
      business on such Special Record Date and shall no longer be payable
      pursuant to the following clause (2). In case a Bearer Security of any
      series is surrendered at the office or agency in a Place of Payment for
      such series in exchange for a Registered Security of such series after the
      close of business at such office or agency on any Special Record Date and
      before the opening of business at such office or agency on the related
      proposed date for payment of Defaulted Interest, such Bearer Security
      shall be surrendered without the coupon relating to such proposed date of
      payment and Defaulted Interest will not be payable on such proposed date
      of payment in respect of the Registered Security issued in exchange for
      such Bearer Security, but will be payable only to the Holder of such
      coupon when due in accordance with the provisions of this Indenture.

            (2) The Company may make payment of any Defaulted Interest on the
      Registered 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.

            (b) The provisions of this Section 307(b) may be made applicable to
any series of Securities pursuant to Section 301 (with such modifications,
additions or substitutions as may be specified pursuant to such Section 301).
The interest rate (or the spread or spread multiplier used to calculate such
interest rate, if applicable) on any Security of such series may be reset by the
Company on the date or dates specified on the face of such Security (each an
"Optional Reset Date"). The Company may exercise such option with respect to
such Security by notifying the Trustee of such exercise at least 45 but not more
than 60 days prior to an Optional Reset Date for such Security. Not later than
40 days prior to each Optional Reset Date, the Trustee shall transmit, in the
manner provided for in Section 106, to the Holder of any such Security a notice
(the "Reset Notice") indicating whether the Company has elected to reset the
interest rate (or the spread or spread multiplier used to calculate such
interest rate, if applicable), and if so (i) such new interest rate (or such new
spread or spread multiplier, if applicable) and (ii) the provisions, if any, for
redemption during the period from such Optional Reset Date to the next Optional
Reset Date or if there is no such next Optional Reset Date, to the Stated
Maturity

                                       33
<PAGE>   41

of such Security (each such period a "Subsequent Interest Period"), including
the date or dates on which or the period or periods during which and the price
or prices at which such redemption may occur during the Subsequent Interest
Period.

            Notwithstanding the foregoing, not later than 20 days prior to the
Optional Reset Date, the Company may, at its option, revoke the interest rate
(or the spread or spread multiplier used to calculate such interest rate, if
applicable) provided for in the Reset Notice and establish a higher interest
rate (or a spread or spread multiplier providing for a higher interest rate, if
applicable) for the Subsequent Interest Period by causing the Trustee to
transmit, in the manner provided for in Section 106, notice of such higher
interest rate (or such spread or spread multiplier providing for a higher
interest rate, if applicable) to the Holder of such Security. Such notice shall
be irrevocable. All Securities with respect to which the interest rate (or the
spread or spread multiplier used to calculate such interest rate, if applicable)
is reset on an Optional Reset Date, and with respect to which the Holders of
such Securities have not tendered such Securities for repayment (or have validly
revoked any such tender) pursuant to the next succeeding paragraph, will bear
such higher interest rate (or such spread or spread multiplier providing for a
higher interest rate, if applicable).

            The Holder of any such Security may have the option to elect
repayment by the Company of the principal of such Security on each Optional
Reset Date at a price equal to the principal amount thereof plus interest
accrued to such Optional Reset Date. In order to obtain repayment on an Optional
Reset Date, the Holder must follow the procedures set forth in Article Thirteen
for repayment at the option of Holders except that the period for delivery or
notification to the Trustee shall be at least 25 but not more than 35 days prior
to such Optional Reset Date and except that, if the Holder has tendered any
Security for repayment pursuant to the Reset Notice, the Holder may, by written
notice to the Trustee, revoke such tender or repayment until the close of
business on the tenth day before such Optional Reset Date.

            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 Optional Extension of Maturity.

            The provisions of this Section 308 may be made applicable to any
series of Securities pursuant to Section 301 (with such modifications, additions
or substitutions as may be specified pursuant to such Section 301). The Stated
Maturity of any Security of such series may be extended at the option of the
Company for the period or periods specified on the face of such Security (each
an "Extension Period") up to but not beyond the date (the "Final Maturity") set
forth on the face of such Security. The Company may exercise such option with
respect to any Security by notifying the Trustee of such exercise at least 45
but not more than 60 days prior to the Stated Maturity of such Security in
effect prior to the exercise of such option (the "Original Stated Maturity"). If
the Company exercises such option, the Trustee shall transmit, in the manner
provided for in Section 106, to the Holder of such Security not later than 40
days prior to the Original Stated Maturity a notice (the "Extension Notice")
indicating (i) the election of the Company to extend the Stated Maturity, (ii)
the new Stated Maturity, (iii) the interest rate (or

                                       34
<PAGE>   42

spread, spread multiplier or other formula used to calculate such interest rate,
if applicable), if any, applicable to the Extension Period and (iv) the
provisions, if any, for redemption during such Extension Period. Upon the
Trustee's transmittal of the Extension Notice, the Stated Maturity of such
Security shall be extended automatically and, except as modified by the
Extension Notice and as described in the next paragraph, such Security will have
the same terms as prior to the transmittal of such Extension Notice.

            Notwithstanding the foregoing, not later than 20 days before the
Original Stated Maturity of such Security, the Company may, at its option,
revoke the interest rate (or spread, spread multiplier or other formula used to
calculate such interest rate, if applicable) provided for in the Extension
Notice and establish a higher interest rate (or spread, spread multiplier or
other formula to calculate such higher interest rate, if applicable) for the
Extension Period by causing the Trustee to transmit, in the manner provided for
in Section 106, notice of such higher interest rate (or spread, spread
multiplier or other formula used to calculate such interest rate, if applicable)
to the Holder of such Security. Such notice shall be irrevocable. All Securities
with respect to which the Stated Maturity is extended will bear such higher
interest rate.

            If the Company extends the Stated Maturity of any Security, the
Holder will have the option to elect repayment of such Security by the Company
on the Original Stated Maturity at a price equal to the principal amount
thereof, plus interest accrued to such date. In order to obtain repayment on the
Original Stated Maturity once the Company has extended the Stated Maturity
thereof, the Holder must follow the procedures set forth in Article Thirteen for
repayment at the option of Holders, except that the period for delivery or
notification to the Trustee shall be at least 25 but not more than 35 days prior
to the Original Stated Maturity and except that, if the Holder has tendered any
Security for repayment pursuant to an Extension Notice, the Holder may by
written notice to the Trustee revoke such tender for repayment until the close
of business on the tenth day before the Original Stated Maturity.

            SECTION 309 Persons Deemed Owners.

            Prior to due presentment of a Registered Security for registration
of transfer, the Company, the Subsidiary Guarantors, if any, the Trustee and any
agent of the Company, the Subsidiary Guarantors, if any, or the Trustee may
treat the Person in whose name such Registered Security is registered as the
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
Registered Security and for all other purposes whatsoever, whether or not such
Registered Security be overdue, and none of the Company, the Subsidiary
Guarantors, if any, the Trustee nor any agent of the Company, the Subsidiary
Guarantors, if any, or the Trustee shall be affected by notice to the contrary.

            Title to any Bearer Security and any coupons appertaining thereto
shall pass by delivery. The Company, the Subsidiary Guarantors, if any, the
Trustee and any agent of the Company, the Subsidiary Guarantors, if any, or the
Trustee may treat the bearer of any Bearer Security and the bearer of any coupon
as the absolute owner of such Security or coupon for the purpose of receiving
payment thereof or on account thereof and for all other purposes whatsoever,
whether or not such Security or coupon be overdue, and none of the Company, the

                                       35
<PAGE>   43

Subsidiary Guarantors, if any, the Trustee nor any agent of the Company, the
Subsidiary Guarantors, if any, or the Trustee shall be affected by notice to the
contrary.

            None of the Company, the Subsidiary Guarantors, the Trustee, any
Paying Agent or the Security Registrar will have any responsibility or liability
for any aspect of the records relating to or payments made on account of
beneficial ownership interests of a Security in global form or for maintaining,
supervising or reviewing any records relating to such beneficial ownership
interests.

            Notwithstanding the foregoing, with respect to any global Security,
nothing herein shall prevent the Company, the Subsidiary Guarantors, the
Trustee, or any agent of the Company, the Subsidiary Guarantors, if any, or the
Trustee, from giving effect to any written certification, proxy or other
authorization furnished by any depositary, as a Holder, with respect to such
global Security or impair, as between such depositary and owners of beneficial
interests in such global Security, the operation of customary practices
governing the exercise of the rights of such depositary (or its nominee) as
Holder of such global Security.

            SECTION 310 Cancellation.

            All Securities and coupons surrendered for payment, redemption,
repayment at the option of the Holder, registration of transfer or exchange or
for credit against any sinking fund payment shall, if surrendered to any Person
other than the Trustee, be delivered to the Trustee, and any such Securities and
coupons and Securities and coupons surrendered directly to the Trustee for any
such purpose shall be promptly cancelled by it. The Company may at any time
deliver to the Trustee for cancellation any Securities previously authenticated
and delivered hereunder which the Company may have acquired in any manner
whatsoever, and may deliver to the Trustee (or to any other Person for delivery
to the Trustee) for cancellation any Securities previously authenticated
hereunder which the Company has not issued and sold, and all Securities so
delivered shall be promptly cancelled by the Trustee. If the Company shall so
acquire any of the Securities, however, such acquisition shall not operate as a
redemption or satisfaction of the indebtedness represented by such Securities
unless and until the same are surrendered to the Trustee for cancellation. No
Securities shall be authenticated in lieu of or in exchange for any Securities
cancelled as provided in this Section, except as expressly permitted by this
Indenture. Cancelled Securities and coupons held by the Trustee shall be
destroyed by the Trustee and the Trustee shall deliver a certificate of such
destruction to the Company, unless by a Company Order the Company directs their
return to it.

            SECTION 311 Computation of Interest.

            Except as otherwise specified as contemplated by Section 301 with
respect to Securities of any series, interest, if any, on the Securities of each
series shall be computed on the basis of a 360-day year consisting of twelve
30-day months.

            SECTION 312 Currency and Manner of Payments in Respect of
Securities.

            (a) Unless otherwise specified with respect to any Securities
pursuant to Section 301, with respect to Registered Securities of any series not
permitting the election provided for in paragraph (b) below or the Holders of
which have not made the election provided

                                       36
<PAGE>   44

for in paragraph (b) below, and with respect to Bearer Securities of any series,
except as provided in paragraph (d) below, payment of the principal of (and
premium, if any) and interest, if any, on any Registered or Bearer Security of
such series will be made in the Currency in which such Registered Security or
Bearer Security, as the case may be, is payable. The provisions of this Section
312 may be modified or superseded with respect to any Securities pursuant to
Section 301.

            (b) It may be provided pursuant to Section 301 with respect to
Registered Securities of any series that Holders shall have the option, subject
to paragraphs (d) and (e) below, to receive payments of principal of (or
premium, if any) or interest, if any, on such Registered Securities in any of
the Currencies which may be designated for such election by delivering to the
Trustee for such series of Registered Securities a written election with
signature guarantees and in the applicable form established pursuant to Section
301, not later than the close of business on the Election Date immediately
preceding the applicable payment date. If a Holder so elects to receive such
payments in any such Currency, such election will remain in effect for such
Holder or any transferee of such Holder until changed by such Holder or such
transferee by written notice to the Trustee for such series of Registered
Securities (but any such change must be made not later than the close of
business on the Election Date immediately preceding the next payment date to be
effective for the payment to be made on such payment date and no such change of
election may be made with respect to payments to be made on any Registered
Security of such series with respect to which an Event of Default has occurred
or with respect to which the Company has deposited funds pursuant to Article
Four or Fourteen or with respect to which a notice of redemption has been given
by the Company or a notice of option to elect repayment has been sent by such
Holder or such transferee). Any Holder of any such Registered Security who shall
not have delivered any such election to the Trustee of such series of Registered
Securities not later than the close of business on the applicable Election Date
will be paid the amount due on the applicable payment date in the relevant
Currency as provided in Section 312(a). The Trustee for each such series of
Registered Securities shall notify the Exchange Rate Agent as soon as
practicable after the Election Date of the aggregate principal amount of
Registered Securities for which Holders have made such written election.

            (c) Unless otherwise specified pursuant to Section 301, if the
election referred to in paragraph (b) above has been provided for pursuant to
Section 301, then, unless otherwise specified pursuant to Section 301, not later
than the fourth Business Day after the Election Date for each payment date for
Registered Securities of any series, the Exchange Rate Agent will deliver to the
Company a written notice specifying the Currency in which Registered Securities
of such series are payable, the respective aggregate amounts of principal of
(and premium, if any) and interest, if any, on the Registered Securities to be
paid on such payment date, specifying the amounts in such Currency so payable in
respect of the Registered Securities as to which the Holders of Registered
Securities denominated in any Currency shall have elected to be paid in another
Currency as provided in paragraph (b) above. If the election referred to in
paragraph (b) above has been provided for pursuant to Section 301 and if at
least one Holder has made such election, then, unless otherwise specified
pursuant to Section 301, on the second Business Day preceding such payment date
the Company will deliver to the Trustee for such series of Registered Securities
an Exchange Rate Officer's Certificate in respect of the Dollar or Foreign
Currency or Currencies payments to be made on such payment date. Unless
otherwise specified pursuant to Section 301, the Dollar or Foreign Currency or
Currencies amount receivable by

                                       37
<PAGE>   45

Holders of Registered Securities who have elected payment in a Currency as
provided in paragraph (b) above shall be determined by the Company on the basis
of the applicable Market Exchange Rate in effect on the second Business Day (the
"Valuation Date") immediately preceding each payment date, and such
determination shall be conclusive and binding for all purposes, absent manifest
error.

            (d) If a Conversion Event occurs with respect to a Foreign Currency
in which any of the Securities are denominated or payable other than pursuant to
an election provided for pursuant to paragraph (b) above, then with respect to
each date for the payment of principal of (and premium, if any) and interest, if
any on the applicable Securities denominated or payable in such Foreign Currency
occurring after the last date on which such Foreign Currency was used (the
"Conversion Date"), the Dollar shall be the currency of payment for use on each
such payment date. Unless otherwise specified pursuant to Section 301, the
Dollar amount to be paid by the Company to the Trustee of each such series of
Securities and by such Trustee or any Paying Agent to the Holders of such
Securities with respect to such payment date shall be, in the case of a Foreign
Currency other than a currency unit, the Dollar Equivalent of the Foreign
Currency or, in the case of a currency unit, the Dollar Equivalent of the
Currency Unit, in each case as determined by the Exchange Rate Agent in the
manner provided in paragraph (f) or (g) below.

            (e) Unless otherwise specified pursuant to Section 301, if the
Holder of a Registered Security denominated in any Currency shall have elected
to be paid in another Currency as provided in paragraph (b) above, and a
Conversion Event occurs with respect to such elected Currency, such Holder shall
receive payment in the Currency in which payment would have been made in the
absence of such election; and if a Conversion Event occurs with respect to the
Currency in which payment would have been made in the absence of such election,
such Holder shall receive payment in Dollars as provided in paragraph (d) of
this Section 312.

            (f) The "Dollar Equivalent of the Foreign Currency" shall be
determined by the Exchange Rate Agent and shall be obtained for each subsequent
payment date by converting the specified Foreign Currency into Dollars at the
Market Exchange Rate on the Conversion Date.

            (g) The "Dollar Equivalent of the Currency Unit" shall be determined
by the Exchange Rate Agent and subject to the provisions of paragraph (h) below
shall be the sum of each amount obtained by converting the Specified Amount of
each Component Currency into Dollars at the Market Exchange Rate for such
Component Currency on the Valuation Date with respect to each payment.

            (h) For purposes of this Section 312, the following terms shall have
the following meanings:

            A "Component Currency" shall mean any currency which, on the
      Conversion Date, was a component currency of the relevant currency unit,
      including, but not limited to, the euro.

                                       38
<PAGE>   46

            A "Specified Amount" of a Component Currency shall mean the number
      of units of such Component Currency or fractions thereof which were
      represented in the relevant currency unit, including, but not limited to,
      the euro, on the Conversion Date. If after the Conversion Date the
      official unit of any Component Currency is altered by way of combination
      or subdivision, the Specified Amount of such Component Currency shall be
      divided or multiplied in the same proportion. If after the Conversion Date
      two or more Component Currencies are consolidated into a single currency,
      the respective Specified Amounts of such Component Currencies shall be
      replaced by an amount in such single currency equal to the sum of the
      respective Specified Amounts of such consolidated Component Currencies
      expressed in such single currency, and such amount shall thereafter be a
      Specified Amount and such single currency shall thereafter be a Component
      Currency. If after the Conversion Date any Component Currency shall be
      divided into two or more currencies, the Specified Amount of such
      Component Currency shall be replaced by amounts of such two or more
      currencies, having an aggregate Dollar Equivalent value at the Market
      Exchange Rate on the date of such replacement equal to the Dollar
      Equivalent of the Specified Amount of such former Component Currency at
      the Market Exchange Rate immediately before such division, and such
      amounts shall thereafter be Specified Amounts and such currencies shall
      thereafter be Component Currencies. If, after the Conversion Date of the
      relevant currency unit, including, but not limited to, the euro, a
      Conversion Event (other than any event referred to above in this
      definition of "Specified Amount") occurs with respect to any Component
      Currency of such currency unit and is continuing on the applicable
      Valuation Date, the Specified Amount of such Component Currency shall, for
      purposes of calculating the Dollar Equivalent of the Currency Unit, be
      converted into Dollars at the Market Exchange Rate in effect on the
      Conversion Date of such Component Currency.

            "Election Date" shall mean the Regular Record Date for the
      applicable series of Registered Securities or at least 16 days prior to
      Maturity, as the case may be, or such other prior date for any series of
      Registered Securities as specified pursuant to clause 13 of Section 301 by
      which the written election referred to in Section 312(b) may be made.

            All decisions and determinations of the Exchange Rate Agent
regarding the Dollar Equivalent of the Foreign Currency, the Dollar Equivalent
of the Currency Unit, the Market Exchange Rate and changes in the Specified
Amounts as specified above shall be in its sole discretion and shall, in the
absence of manifest error, be conclusive for all purposes and irrevocably
binding upon the Company, the Trustee for the appropriate series of Securities
and all Holders of such Securities denominated or payable in the relevant
Currency. The Exchange Rate Agent shall promptly give written notice to the
Company and the Trustee for the appropriate series of Securities of any such
decision or determination.

            In the event that the Company determines in good faith that a
Conversion Event has occurred with respect to a Foreign Currency, the Company
will immediately give written notice thereof to the Trustee of the appropriate
series of Securities and to the Exchange Rate Agent (and such Trustee will
promptly thereafter give notice in the manner provided in Section 106 to the
affected Holders) specifying the Conversion Date. In the event the Company so
determines that a Conversion Event has occurred with respect to the euro or any
other currency unit in which Securities are denominated or payable, the Company
will immediately give written

                                       39
<PAGE>   47

notice thereof to the Trustee of the appropriate series of Securities and to the
Exchange Rate Agent (and such Trustee will promptly thereafter give notice in
the manner provided in Section 106 to the affected Holders) specifying the
Conversion Date and the Specified Amount of each Component Currency on the
Conversion Date. In the event the Company determines in good faith that any
subsequent change in any Component Currency as set forth in the definition of
Specified Amount above has occurred, the Company will similarly give written
notice to the Trustee of the appropriate series of Securities and to the
Exchange Rate Agent.

            The Trustee of the appropriate series of Securities shall be fully
justified and protected in conclusively relying and acting upon information
received by it from the Company and the Exchange Rate Agent and shall not
otherwise have any duty or obligation to determine the accuracy or validity of
such information independent of the Company or the Exchange Rate Agent.

            SECTION 313 Appointment and Resignation of Successor Exchange Rate
Agent.

            (a) Unless otherwise specified pursuant to Section 301, if and so
long as the Securities of any series (i) are denominated in a Foreign Currency
or (ii) may be payable in a Foreign Currency, or so long as it is required under
any other provision of this Indenture, then the Company will maintain with
respect to each such series of Securities, or as so required, at least one
Exchange Rate Agent. The Company will cause the Exchange Rate Agent to make the
necessary foreign exchange determinations at the time and in the manner
specified pursuant to Section 301 for the purpose of determining the applicable
rate of exchange and, if applicable, for the purpose of converting the issued
Foreign Currency into the applicable payment Currency for the payment of
principal (and premium, if any) and interest, if any, pursuant to Section 312.

            (b) No resignation of the Exchange Rate Agent and no appointment of
a successor Exchange Rate Agent pursuant to this Section shall become effective
until the acceptance of appointment by the successor Exchange Rate Agent as
evidenced by a written instrument delivered to the Company and the Trustee of
the appropriate series of Securities accepting such appointment executed by the
successor Exchange Rate Agent.

            (c) If the Exchange Rate Agent shall resign, be removed or become
incapable of acting, or if a vacancy shall occur in the office of the Exchange
Rate Agent for any cause, with respect to the Securities of one or more series,
the Company, by or pursuant to a Board Resolution, shall promptly appoint a
successor Exchange Rate Agent or Exchange Rate Agents with respect to the
Securities of that or those series (it being understood that any such successor
Exchange Rate Agent may be appointed with respect to the Securities of one or
more or all of such series and that, unless otherwise specified pursuant to
Section 301, at any time there shall only be one Exchange Rate Agent with
respect to the Securities of any particular series that are originally issued by
the Company on the same date and that are initially denominated and/or payable
in the same Currency).

                                       40
<PAGE>   48

            SECTION 314 CUSIP Numbers.

            The Company in issuing the Securities may use "CUSIP" numbers (if
then generally in use), and, if so, the Trustee shall indicate the "CUSIP"
numbers of the Securities in notices of redemption as a convenience to Holders;
provided that, any such notice may state that no representation is made as to
the correctness of such numbers either as printed on the Securities or as
contained in any notice of redemption and that reliance may be placed only on
the other identification numbers printed on the Securities, and any such
redemption shall not be affected by any defect in or omission of such numbers.
The Company will promptly notify the Trustee of any change in the "CUSIP"
numbers.

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

            SECTION 401 Satisfaction and Discharge of Indenture.

            Unless otherwise specified pursuant to Section 301, this Indenture
shall upon Company Request cease to be of further effect with respect to any
series of Securities specified in such Company Request (except as to any
surviving rights of registration of transfer or exchange of Securities of such
series expressly provided for herein or pursuant hereto and any right to receive
Additional Amounts, as provided in Section 1005), and the Trustee, upon receipt
of a Company Order, and at the expense of the Company, shall execute proper
instruments acknowledging satisfaction and discharge of this Indenture as to
such series when

            (1) either

                  (A) all Securities of such series theretofore authenticated
            and delivered and all coupons, if any, appertaining thereto (other
            than (i) coupons appertaining to Bearer Securities surrendered for
            exchange for Registered Securities and maturing after such exchange,
            whose surrender is not required or has been waived as provided in
            Section 305, (ii) Securities and coupons of such series which have
            been destroyed, lost or stolen and which have been replaced or paid
            as provided in Section 306, (iii) coupons appertaining to Securities
            called for redemption and maturing after the relevant Redemption
            Date, whose surrender has been waived as provided in Section 1106,
            and (iv) Securities and coupons of such series for whose payment
            money has theretofore been deposited in trust or segregated and held
            in trust by the Company and thereafter repaid to the Company or
            discharged from such trust, as provided in Section 1003) have been
            delivered to the Trustee for cancellation; or

                  (B) all Securities of such series and, in the case of (I) or
            (II) below, any coupons appertaining thereto not theretofore
            delivered to the Trustee for cancellation

                        (I) have become due and payable, or

                                       41
<PAGE>   49

                        (II) will become due and payable at their Stated
                  Maturity within one year, or

                        (III) if redeemable at the option of the Company, are to
                  be called for redemption within one year under arrangements
                  satisfactory to the Trustee for the giving of notice of
                  redemption by the Trustee in the name, and at the expense, of
                  the Company,

                  and the Company, in the case of (I), (II) or (III) above, has
                  irrevocably deposited or caused to be deposited with the
                  Trustee as trust funds in trust for such purpose an amount in
                  the Currency in which the Securities of such series are
                  payable, sufficient to pay and discharge the entire
                  indebtedness on such Securities and such coupons not
                  theretofore delivered to the Trustee for cancellation,
                  including the principal (and premium, if any) and interest, if
                  any, to the date of such deposit (in the case of Securities
                  which have become due and payable) or to the Stated Maturity
                  or Redemption Date, as the case may be;

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

            (3) the Company has delivered to the Trustee an Officers'
      Certificate and an Opinion of Counsel, each stating that all conditions
      precedent herein provided for relating to the satisfaction and discharge
      of this Indenture as to such series have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee and any predecessor Trustee under
Section 606, the obligations of the Company to any Authenticating Agent under
Section 611 if money shall have been deposited with the Trustee pursuant to
subclause (B) of clause (1) of this Section, the obligations of the Trustee
under Section 402 and the last paragraph of Section 1003 and the obligations of
the Company and the Trustee with respect to Securities of such series under
Sections 305, 306, 1002 and 1005, with respect to the payment of Additional
Amounts, if any, with respect to any rights of Holders to require the Company to
repay such Securities as contemplated by Section 1301 and with respect to any
rights of Holders to convert or exchange such Securities into other Securities,
shall survive. These obligations shall continue to be governed and construed in
accordance with Section 111.

            SECTION 402 Application of Trust Funds.

            Subject to the provisions of the last paragraph of Section 1003, all
money deposited with the Trustee pursuant to Section 401 shall be held in trust
and applied by it, in accordance with the provisions of the Securities, the
coupons and this Indenture, to the payment, either directly or through any
Paying Agent (including the Company acting as its own Paying Agent) as the
Trustee may determine, to the Persons entitled thereto, of the principal (and
premium, if any) and interest, if any, for whose payment such money has been
deposited with or

                                       42
<PAGE>   50

received by the Trustee, but such money need not be segregated from other funds
except to the extent required by law.

                                  ARTICLE FIVE

                                    REMEDIES

            SECTION 501 Events of Default.

            "Event of Default", wherever used herein with respect to any
particular series of Securities, means any one of the following events as such
events may be otherwise amended in accordance with Section 301 (whatever the
reason for such Event of Default and whether or not it shall be voluntary or
involuntary or be effected by operation of law or pursuant to any judgment,
decree or order of any court or any order, rule or regulation of any
administrative or governmental body):

            (1) default in the payment of any interest upon, or any Additional
      Amount payable in respect of, any Security of that series or of any coupon
      appertaining thereto, when such interest or coupon becomes due and
      payable, and continuance of such default for a period of 30 days; or

            (2) default in the payment of the principal of (or premium, if any,
      on) any Security of that series when it becomes due and payable at its
      Maturity; or

            (3) default in the deposit of any sinking fund payment, when and as
      due by the terms of any Security of that series; or

            (4) default in the performance, or breach, of any covenant or
      agreement of the Company or any Subsidiary Guarantor in this Indenture
      with respect to any Security of that series (other than a covenant or
      agreement a default in whose performance or whose breach is elsewhere in
      this Section specifically dealt with), and continuance of such default or
      breach for a period of 60 days after there has been given, by registered
      or certified mail, to the Company or such Subsidiary Guarantor, as the
      case may be, by the Trustee or to the Company or such Subsidiary
      Guarantor, as the case may be, and the Trustee by the Holders of at least
      25% in principal amount of the Outstanding Securities of that 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;
      or

            (5) the Company or any Subsidiary Guarantor pursuant to or within
      the meaning of any Bankruptcy Law:

                  (A) commences a voluntary case or proceedings,

                  (B) consents to the entry of an order for relief against it in
            an involuntary case or proceedings,

                                       43
<PAGE>   51

                  (C) consents to the appointment of a Custodian of it or for
            all or substantially all of its property,

                  (D) makes a general assignment for the benefit of its
            creditors, or

                  (E) issues a public announcement admitting its inability to
            pay its debts generally as they become due; or

            (6) a court of competent jurisdiction enters an order or decree
      under any Bankruptcy Law that:

                  (A) is for relief against the Company or any Subsidiary
            Guarantor in an involuntary case,

                  (B) appoints a Custodian of the Company or any Subsidiary
            Guarantor or for all or substantially all of its property, or

                  (C) orders the winding-up or liquidation of the Company or any
            Subsidiary Guarantor, and the order or decree remains unstayed and
            in effect for 90 days; or

            (7) any Subsidiary Guarantor repudiates its obligations under any
      Subsidiary Guarantee or, except as permitted by this Indenture, any
      Subsidiary Guarantee is determined to be unenforceable or invalid or shall
      for any reason cease to be in full force and effect; or

            (8) any other Event of Default provided with respect to Securities
      of that series.

The term "Bankruptcy Law" means title 11, U.S. Code or any similar foreign,
Federal or State law for the relief of debtors. The term "Custodian" means any
custodian, receiver, trustee, assignee, liquidator or other similar official
under any Bankruptcy Law.

            SECTION 502 Acceleration of Maturity; Rescission and Annulment.

            If an Event of Default (other than an Event of Default specified in
Section 501(5) or 501(6) with respect to the Company) with respect to Securities
of any series at the time Outstanding occurs and is continuing, then and in
every such case the Trustee or the Holders of not less than 25% in principal
amount of the Outstanding Securities of that series may declare the principal
(or, if any Securities are Original Issue Discount Securities or Indexed
Securities, such portion of the principal as may be specified in the terms
thereof) and accrued interest of all the Securities of that series to be due and
payable immediately, by a notice in writing to the Company (and to the Trustee
if given by the Holders), and upon any such declaration such principal or
specified portion thereof and interest shall become immediately due and payable.
If an Event of Default specified in Section 501(5) or 501(6) with respect to the
Company or any Subsidiary Guarantor occurs, the amounts described above with
respect to the Outstanding Securities of all series shall ipso facto become and
be immediately due and payable without any declaration or other act on the part
of the Trustee or any Holder. Upon payment of such

                                       44
<PAGE>   52

principal and interest, all of the Company's obligations under the Securities of
such Series and this Indenture, other than obligations under Section 606, shall
terminate.

            At any time after such a declaration of acceleration with respect to
Securities of any series has been made and before a judgment or decree for
payment of the money due has been obtained by the Trustee as hereinafter
provided in this Article, the Holders of a majority in principal amount of the
Outstanding Securities of that series, by written notice to the Company and the
Trustee, may rescind and annul such declaration and its consequences if:

            (1) the Company or any Subsidiary Guarantor has paid or deposited
      with the Trustee a sum sufficient in cash to pay all principal, interest
      and Additional Amounts which have become due other than by such
      declaration of acceleration, interest or any such overdue amounts, and
      amounts owing the Trustee;

            (2) all Events of Default with respect to Securities of that series,
      other than the nonpayment of the principal of (or premium, if any) or
      interest on Securities of that series which have become due solely by such
      declaration of acceleration, have been cured or waived as provided in
      Section 513; and

            (3) such rescission would not conflict with any judgment or decree
      of a court of competent jurisdiction.

            No such rescission shall affect any subsequent default or impair any
right consequent thereon.

            SECTION 503 Collection of Indebtedness and Suits for Enforcement by
Trustee.

            The Company covenants that if:

            (1) default is made in the payment of any installment of interest or
      Additional Amounts on any Security of any series and any related coupon
      when such interest or Additional Amounts becomes due and payable and such
      default continues for a period of 30 days, or

            (2) default is made in the payment of the principal of (or premium,
      if any, on) any Security of any series at its Maturity,

then the Company will, upon demand of the Trustee, pay to the Trustee, for the
benefit of the Holders of Securities of such series and coupons, the whole
amount then due and payable on such Securities and coupons for principal (and
premium, if any) and interest, if any, with interest upon any overdue principal
(and premium, if any) and, to the extent that payment of such interest shall be
legally enforceable, upon any overdue installments of interest, if any, at the
rate or rates borne by or provided for in such Securities, and, in addition
thereto, such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

            If the Company fails 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

                                       45
<PAGE>   53

the collection of the sums so due and unpaid, and may prosecute such proceeding
to judgment or final decree, and may enforce the same against the Company or any
other obligor upon Securities of such series 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 of such series, wherever
situated.

            If an Event of Default with respect to Securities of any series
occurs and is 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 and any related coupons 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.

            SECTION 504 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, any Subsidiary Guarantor or
any other obligor upon the Securities or the property of the Company, such
Subsidiary Guarantor or of such other obligor or their creditors, the Trustee
(irrespective of whether the principal of the Securities of any series 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 any overdue principal, premium 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 (or
      in the case of Original Issue Discount Securities or Indexed Securities,
      such portion of the principal as may be provided for in the terms thereof)
      (and 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 the reasonable compensation, expenses,
      disbursements and advances of the Trustee, its agents and counsel) 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 of Securities of such series and coupons 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 amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee and any predecessor Trustee, their agents and counsel, and any other
amounts due the Trustee or any predecessor Trustee under Section 606.

            Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a Security
or coupon any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or coupons or

                                       46
<PAGE>   54

the rights of any Holder thereof, or to authorize the Trustee to vote in respect
of the claim of any Holder of a Security or coupon in any such proceeding.

            SECTION 505 Trustee May Enforce Claims Without Possession of
Securities or Coupons.

            All rights of action and claims under this Indenture or any of the
Securities or coupons may be prosecuted and enforced by the Trustee without the
possession of any of the Securities or coupons 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 of the Securities and
coupons in respect of which such judgment has been recovered.

            SECTION 506 Application of Money Collected.

            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 or coupons, or
both, as the case may be, 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 and any
      predecessor Trustee under Section 606;

            SECOND: To the payment of the amounts then due and unpaid upon the
      Securities and coupons for principal (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 aggregate amounts due and payable on such Securities and
      coupons for principal (and premium, if any) and interest, if any,
      respectively; and

            THIRD: To the payment of the remainder, if any, to the Company.

            SECTION 507 Limitation on Suits.

            No Holder of any Security of any series or any related coupon 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:

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

                  (2) the Holders of not less than 25% in principal amount of
            the Outstanding Securities of that series 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;

                                       47
<PAGE>   55

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

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

            (5) no direction inconsistent with such written request has been
      given to the Trustee during such 60-day period by the Holders of a
      majority in principal amount of the Outstanding Securities of that series;

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 such
Holders.

            SECTION 508 Unconditional Right of Holders to Receive Principal,
Premium and Interest and Additional Amounts, if Any.

            Notwithstanding any other provision in this Indenture, the Holder of
any Security or coupon shall have the right which is absolute and unconditional
to receive payment of the principal of (and premium, if any) and (subject to
Sections 305 and 307) interest, if any, and Additional Amounts, if any, on such
Security or payment of such coupon on the respective due dates expressed in such
Security or coupon (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.

            SECTION 509 Restoration of Rights and Remedies.

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

            SECTION 510 Rights and Remedies Cumulative.

            Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities or coupons in the
last paragraph of Section 306, no right or remedy herein conferred upon or
reserved to the Trustee or to the Holders of Securities or coupons 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.

                                       48
<PAGE>   56

            SECTION 511 Delay or Omission Not Waiver.

            No delay or omission of the Trustee or of any Holder of any Security
or coupon 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
of Securities or coupons, as the case may be.

            SECTION 512 Control by Holders of Securities.

            The Holders of a majority in principal amount of the Outstanding
Securities of any 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 that

            (1) such direction shall not be in conflict with any rule of law or
      with this Indenture,

            (2) the Trustee may take any other action deemed proper by the
      Trustee which is not inconsistent with such direction, and

            (3) the Trustee need not take any action which might involve it in
      personal liability or be unjustly prejudicial to the Holders of Securities
      of such series not consenting.

            SECTION 513 Undertaking for Costs.

            All parties to this Indenture agree that 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 or omitted by it as a Trustee, a court in its
discretion may require the filing by any party litigant in the suit of an
undertaking to pay the costs of the suit, and the court in its discretion may
assess reasonable costs, including reasonable attorney's fees and expenses,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant, provided that this
Section 513 shall not apply to a suit by the Trustee, a suit by a Holder
pursuant to Section 508 hereof, or a suit by Holders of more than 10% in
principal amount of the then Outstanding Securities.

            SECTION 514 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 and any related coupons waive any past default
hereunder with respect to such series and its consequences, except a default

            (1) in the payment of the principal of (or premium, if any) or
      interest, if any, or Additional Amounts on any Security of such series or
      any related coupons, or

                                       49
<PAGE>   57

            (2) in respect of a covenant or provision hereof which under Article
      Nine cannot be modified or amended without the consent of the Holder of
      each Outstanding Security of such series affected.

            Upon any such waiver, such default shall cease to exist, and any
Event 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 Event of Default or impair any right consequent thereon.

            SECTION 515 Waiver of Usury, Stay or Extension Laws.

            Each of the Company and the Subsidiary Guarantors 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 or any usury or other law wherever enacted, now or at
any time hereafter in force, which may affect the covenants or the performance
of this Indenture; and each of the Company and the Subsidiary Guarantors (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 SIX

                                   THE TRUSTEE

            SECTION 601 Notice of Defaults.

            Within five days after the earlier of receipt from the Company of
notice of the occurrence of a Default or Event of Default hereunder or the date
such occurrence hereunder actually becomes known to a Responsible Officer of the
Trustee, the Trustee shall transmit to all Holders of Securities of such series,
in the manner and to the extent provided in TIA Section 313(c), notice of such
Default hereunder known to the Trustee, unless such Default shall have been
cured or waived; provided, however, that, except in the case of a Default in the
payment of the principal of (or premium, if any) or interest, if any, on any
Security of such series, or in the payment of any sinking or purchase fund
installment with respect to the Securities of such series, the Trustee shall be
protected in withholding such notice if and so long as the board of directors,
the executive committee or a trust committee of directors and/or Responsible
Officers of the Trustee in good faith determines that the withholding of such
notice is in the interests of the Holders of the Securities and coupons of such
series; and provided further that in the case of any Default or breach of the
character specified in Section 501(4) with respect to the Securities and coupons
of such series, no such notice to Holders shall be given until at least 60 days
after the occurrence thereof unless otherwise specified in accordance with
Section 301.

            SECTION 602 Certain Rights of Trustee.

            Subject to the provisions of TIA Section 315(a) through 315(d):

                                       50
<PAGE>   58

            (1) The Trustee undertakes to perform such duties and only such
      duties as are specifically set forth in this Indenture, and no implied
      covenants or obligations shall be read into this Indenture against the
      Trustee.

            (2) The Trustee may conclusively rely and shall be protected in
      acting or refraining from acting upon any resolution, certificate,
      statement, instrument, opinion, report, notice, request, direction,
      consent, order, bond, debenture, note, coupon or other paper or document
      believed by it to be genuine and to have been signed or presented by the
      proper party or parties.

            (3) Any request or direction of the Company mentioned herein shall
      be sufficiently evidenced by a Company Request or Company Order (other
      than delivery of any Security, together with any coupons appertaining
      thereto, to the Trustee for authentication and delivery pursuant to
      Section 303 which shall be sufficiently evidenced as provided therein) and
      any resolution of the Board of Directors may be sufficiently evidenced by
      a Board Resolution.

            (4) The Trustee shall not be liable for any error of judgment made
      in good faith by a Responsible Officer, unless it shall be proved that the
      Trustee was negligent in ascertaining the pertinent facts.

            (5) The Trustee shall not be liable with respect to any action taken
      or omitted to be taken by it in good faith in accordance with the
      direction of the Holders of a majority in principal amount of the
      Outstanding Securities of any series, determined as provided in Sections
      101 and 104.

            (6) 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 prescribed) may, in the absence of
      bad faith on its part, rely upon a Board Resolution, an Opinion of Counsel
      or an Officers' Certificate.

            (7) The Trustee may consult with counsel of its choosing and the
      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.

            (8) 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 of the Holders of Securities of any series or any related
      coupons pursuant to this Indenture, unless such Holders shall have offered
      to the Trustee security or indemnity reasonably satisfactory to the
      Trustee against the costs, expenses and liabilities which might be
      incurred by it in compliance with such request or direction.

            (9) 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, coupon or other paper or document, but the Trustee,
      in its discretion, may make such further inquiry or

                                       51
<PAGE>   59

      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 be entitled to examine the books, records and premises of the
      Company, personally or by agent or attorney but in the case of any
      certificate or opinion specifically required by the Indenture to be
      delivered to the Trustee, the Trustee shall have a duty to examine the
      same to determine whether they conform to the Indenture requirements.

            (10) 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.

            (11) The Trustee shall not be liable for any action taken, suffered
      or omitted by it in good faith and believed by it to be authorized or
      within the discretion or rights or powers conferred upon it by this
      Indenture other than any liabilities arising out of the negligence of the
      Trustee.

            (12) The rights, privileges, protections, immunities and benefits
      given to the Trustee, including, without limitation, its right to be
      indemnified, are extended to, and shall be enforceable by, the Trustee in
      each of its capacities hereunder, and to each agent, custodian and other
      Person employed to act hereunder.

            (13) The Trustee may request that the Company deliver an Officers'
      Certificate setting forth the names of individuals and/or titles of
      officers authorized at such time to take specified actions pursuant to
      this Indenture, which Officers' Certificate may be signed by any person
      authorized to sign an Officers' Certificate, including any person
      specified as so authorized in any such certificate previously delivered
      and not superseded.

            The Trustee shall not be required 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.

            SECTION 603 Not Responsible for Recitals or Issuance of Securities.

            The recitals contained herein and in the Securities, except the
Trustee's certificate of authentication, and in any coupons shall be taken as
the statements of the Company, and neither the Trustee nor any Authenticating
Agent assumes any responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Indenture or of the
Securities or coupons, except that the Trustee represents that it is duly
authorized to execute and deliver this Indenture, authenticate the Securities
and perform its obligations hereunder and that the statements made by it in a
Statement of Eligibility on Form T-1 supplied to the Company are true and
accurate, subject to the qualifications set forth therein. Neither the Trustee
nor any Authenticating Agent shall be accountable for the use or application by
the Company of Securities or the proceeds thereof.

                                       52
<PAGE>   60

            SECTION 604 May Hold Securities.

            The Trustee, any Paying Agent, Security Registrar, Authenticating
Agent or any other agent of the Company or the Subsidiary Guarantors, in its
individual or any other capacity, may become the owner or pledgee of Securities
and coupons and, subject to TIA Sections 310(b) and 311, may otherwise deal with
the Company with the same rights it would have if it were not Trustee, Paying
Agent, Security Registrar, Authenticating Agent or such other agent.

            SECTION 605 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
otherwise agreed with the Company.

            SECTION 606 Compensation and Reimbursement.

            The Company agrees:

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

            (2) except as otherwise expressly provided herein, to reimburse each
      of the Trustee and any predecessor Trustee upon its request for all
      reasonable expenses, disbursements and advances 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 any such expense, disbursement or advance as may be
      attributable to its negligence or bad faith; and

            (3) to indemnify each of the Trustee and any predecessor Trustee
      for, and to hold it harmless against, any loss, damage, claims, liability
      or expense incurred without negligence or bad faith on its own part,
      arising out of or in connection with the acceptance or administration of
      the trust or trusts hereunder, including the costs and expenses of
      defending itself against any claim (whether asserted by the Company or any
      Holder or any other Person) or liability in connection with the exercise
      or performance of any of its powers or duties hereunder.

            As security for the performance of the obligations of the Company
under this Section, the Trustee shall have a claim prior to the Securities upon
all property and funds held or collected by the Trustee as such, except funds
held in trust for the payment of principal of (or premium, if any) or interest,
if any, on particular Securities or any coupons.

            When the Trustee incurs expenses or renders services after an Event
of Default specified in Section 501(5) or (6) occurs, the expenses and
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

                                       53
<PAGE>   61

            SECTION 607 Corporate Trustee Required; Eligibility.

            There shall at all times be a Trustee hereunder which shall be
eligible to act as Trustee under TIA Section 310(a)(1) and shall have a combined
capital and surplus of at least $50,000,000. If such corporation publishes
reports of condition at least annually, pursuant to law or the requirements of
Federal, State, Territorial or District of Columbia supervising or examining
authority, then for the purposes of this Section, the combined capital and
surplus of such corporation shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. 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 608 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 609.

            (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.

            (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.

            (d) If at any time:

                  (1) the Trustee shall fail to comply with the provisions of
            TIA Section 310(b) after written request therefor by the Company or
            by any Holder of a Security who has been a bona fide Holder of a
            Security for at least six months, or

                  (2) the Trustee shall cease to be eligible under Section 607
            and shall fail to resign after written request therefor by the
            Company or by any Holder of a Security who has been a bona fide
            Holder of a Security for at least six months, 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, (i) the Company by or pursuant to a Board Resolution may
remove the Trustee and appoint a successor Trustee with respect to all
Securities, or (ii) subject to TIA Section 315(e), any Holder of a Security who
has been a bona fide Holder of a Security 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.

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<PAGE>   62

            (e) If an instrument of acceptance by a successor Trustee shall not
have been delivered to the Trustee within 30 days after the giving of a notice
of resignation or the delivery of an Act of removal, the Trustee resigning or
being removed or any Holder who has been a bona fide Holder of Securities for at
least six months, may petition any court of competent jurisdiction for the
appointment of a successor Trustee.

            (f) 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 with
respect to the Securities of one or more series, the Company, by or pursuant to
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). 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, 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 of Securities
and accepted appointment in the manner hereinafter provided, any Holder of a
Security who has been a bona fide Holder of a Security of such series for at
least six months may, on behalf of himself and all others similarly situated,
petition any court of competent jurisdiction for the appointment of a successor
Trustee with respect to Securities of such series.

            (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
in the manner provided for notices to the Holders of Securities in Section 106.
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 609 Acceptance of Appointment by Successor.

            (a) In case of the appointment hereunder of a successor Trustee with
respect to all Securities, every such successor Trustee 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 request of the
Company or the successor Trustee, such retiring Trustee shall, upon payment of
its charges, 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, subject nevertheless to its
claim, if any, provided for in Section 606.

            (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
Subsidiary Guarantors, if

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<PAGE>   63

applicable, 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 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.

            (c) Upon request of any such successor Trustee, the Company shall
execute any and all instruments for more fully and certainly vesting in and
confirming to such successor Trustee all such rights, powers and trusts referred
to in paragraph (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 610 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 of 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 or coupons 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 or coupons so
authenticated with the same effect as if such successor Trustee had itself
authenticated such Securities or coupons. In case any Securities or coupons
shall not have been authenticated by such predecessor Trustee, any such
successor Trustee may authenticate and deliver such

                                       56
<PAGE>   64

Securities or coupons, in either its own name or that of its predecessor
Trustee, with the full force and effect which this Indenture provides for the
certificate of authentication of the Trustee.

            SECTION 611 Appointment of Authenticating Agent.

            At any time when any of the Securities remain Outstanding, the
Trustee may appoint an Authenticating Agent or Agents with respect to one or
more series of Securities which shall be authorized to act on behalf of the
Trustee to authenticate Securities of such series issued upon exchange,
registration of transfer or partial redemption thereof, 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. Any such appointment shall be evidenced by an instrument in writing
signed by a Responsible Officer of the Trustee, a copy of which instrument shall
be promptly furnished to the Company. 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
reasonably acceptable to the Company and, except as may otherwise be provided
pursuant to Section 301, shall at all times be a bank or trust company or
corporation organized and doing business and in good standing under the laws of
the United States of America or of any State 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 authorities. If such Authenticating Agent
publishes reports of condition at least annually, pursuant to law or the
requirements of the aforesaid 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. In case 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 further act
on the part of the Trustee or the Authenticating Agent.

            An Authenticating Agent for any series of Securities may at any time
resign by giving written notice of resignation to the Trustee for such series
and to the Company. The Trustee for any series of Securities may at any time
terminate the agency of an Authenticating Agent by giving written notice of
termination 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 for such series may appoint a successor
Authenticating Agent which shall be acceptable to the Company and shall give
notice of such appointment to all Holders of Securities of the series with
respect to which such Authenticating Agent will serve in the manner set forth

                                       57
<PAGE>   65

in Section 106. 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 herein. No successor Authenticating Agent shall be
appointed unless eligible under the provisions of this Section.

            The Company agrees to pay to each Authenticating Agent from time to
time reasonable compensation including reimbursement of its reasonable expenses
for its services under this Section.

            If an appointment with respect to one or more series is made
pursuant to this Section, the Securities of such series may have endorsed
thereon, in addition to or in lieu of 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.

                              THE BANK OF NEW YORK
                                   as Trustee

                              By ___________________________
                                 as Authenticating Agent

                              By ___________________________
                                 Authorized Signatory

            SECTION 612 Conflicting Interests.

            (a) The Trustee shall comply with the provisions of Section 310(b)
of the Trust Indenture Act.

            (b) The indenture dated as of December 16, 1996, for the Company's
10 3/4 % Senior Subordinated Notes due 2006 between the Company and The Bank of
New York shall be deemed to be specifically described herein for the purposes of
clause (i) of the first proviso contained in Section 310(b) of the TIA.

            SECTION 613 Appointment of Co-Trustee.

            (A) For the purpose of meeting any legal requirements of any
jurisdiction in which the Company may at the time be located in connection with
the enforcement of any right or the taking of any action on behalf of the
Holders of any Securities issued hereunder, the Trustee shall have the power and
may execute and deliver all instruments necessary to appoint one or more Persons
to act as a co-trustee or co-trustees, or separate trustee or separate trustees,
such powers, duties, obligations, rights and trusts as the Trustee may consider
necessary or desirable. Each co-trustee or separate trustee hereunder shall be
required to meet the terms of eligibility as a trustee under Section 607. The
Trustee shall promptly notify the Holders and the Company of the appointment of
a co-trustee or separate trustee under this section.

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<PAGE>   66

            (B) Every separate trustee and co-trustee shall, to the extent
permitted by law, be appointed and act subject to the following provisions and
conditions:

            (a) all rights, powers, duties and obligations conferred or imposed
      upon the Trustee shall be conferred or imposed upon and exercised or
      performed by the Trustee and such separate trustee or co-trustee jointly
      (it being understood that such separate trustee or co-trustee is not
      authorized to act separately without the Trustee joining in such act),
      except to the extent that under any law of any jurisdiction in which any
      particular act or acts are to be performed the Trustee shall be
      incompetent or unqualified to perform such act or acts, in which event
      such rights, powers, duties and obligations shall be exercised and
      performed singly by such separate trustee or co-trustee, but solely at the
      direction of the Trustee;

            (b) no trustee hereunder shall be personally liable by reason of any
      act or omission of any other trustee hereunder;

            (c) the Trustee may at any time accept the resignation of or remove
      any separate trustee or co-trustee;

            (d) any notice, request or other writing given to the Trustee shall
      be deemed to have been given to each of the then separate trustees and
      co-trustees, as effectively as if given to each of them. Every instrument
      appointing any separate trustee or co-trustee shall refer to this
      Indenture and the conditions of this Article Six. Each separate trustee
      and co-trustee, upon its acceptance of the trusts conferred, shall be
      vested with the estates or property specified in its instrument of
      appointment, either jointly with the Trustee or separately, as may be
      provided therein, subject to all the provisions of this Indenture,
      specifically including every provision of this Indenture relating to the
      conduct of, affecting the liability of, or affording protection or rights
      (including the rights to compensation, reimbursement and indemnification
      hereunder) to, the Trustee. Every such instrument shall be filed with the
      Trustee; and

            (e) any separate trustee or co-trustee may at any time constitute
      the Trustee its agent or attorney-in-fact with full power and authority,
      to the extent not prohibited by law, to do any lawful act under or in
      respect of this Indenture on its behalf and in its name for the purposes
      of enforcing any rights or taking any other action on behalf of the
      Holders of any Securities issued hereunder.

            SECTION 614 Trustee's Application for Instructions from the Company.

            Any application by the Trustee for written instructions from the
Company may, at the option of the Trustee, set forth in writing any action
proposed to be taken or omitted by the Trustee under this Indenture and the date
on and/or after which such action shall be taken or such omission shall be
effective. The Trustee shall not be liable for any action taken by, or omission
of, the Trustee in accordance with a proposal included in such application on or
after the date specified in such application (which date shall not be less than
five Business Days after the date any officer of the Company actually receives
such application, unless any such officer shall have consented in writing to any
earlier date) unless prior to taking any such action (or the effective

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<PAGE>   67

date in the case of an omission), the Trustee shall have received written
instructions in response to such application specifying the action to be taken
or omitted.

                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

            SECTION 701 Disclosure of Names and Addresses of Holders.

            The Company will furnish or cause to be furnished to the Trustee:

            (A) semiannually, not later than 15 days after each Regular Record
      Date for Securities of each series at the time Outstanding, a list in such
      form as the Trustee may reasonably require, of the names and addresses of
      the Holders of Registered Securities as of such Regular Record Date, or if
      there is no Regular Record Date for interest for such series of
      Securities, semiannually, upon such dates as are set forth in the Board
      Resolution, Officers' Certificates indenture supplemental hereto
      authorizing such series, and

            (B) at such other times as the Trustee may request in writing,
      within 30 days after the receipt by the Company of any such request, a
      list of similar form and content as of a date not more than 15 days prior
      to the time such list is furnished;

provided, however, that so long as the Trustee is the Security Registrar, no
such list shall be required to be furnished.

            The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders contained in the most recent
list furnished to the Trustee as provided in Section 701 and the names and
addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

            The rights of the Holders to communicate with other Holders with
respect to their rights under this Indenture or under the Securities, and the
corresponding rights and privileges of the Trustee, shall be as provided by the
Trust Indenture Act.

            Every Holder of Securities or coupons, by receiving and holding the
same, agrees with the Company, the Subsidiary Guarantors and the Trustee that
neither the Company nor any Subsidiary Guarantor nor the Trustee nor any
Authenticating Agent nor any Paying Agent nor any Security Registrar shall be
held accountable by reason of the disclosure of any information as to the names
and addresses of the Holders of Securities in accordance with TIA Section 312,
regardless of the source from which such information was derived, and that the
Trustee shall not be held accountable by reason of mailing any material pursuant
to a request made under TIA Section 312(b).

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            SECTION 702 Reports by Trustee.

            Within 60 days after May 15 of each year commencing with the first
May 15 after the first issuance of Securities pursuant to this Indenture, the
Trustee shall transmit by mail to all Holders of Securities as provided in TIA
Section 313(c) a brief report dated as of such May 15 if required by TIA Section
313(a).

            A copy of each such report shall, at the time of such transmission
to Holders, be filed by the Trustee with each stock exchange, if any, upon which
the Securities are listed, with the Commission and with the Company. The Company
will promptly notify the Trustee of the listing of the Securities on any stock
exchange.

            SECTION 703 Reports by Company and Subsidiary Guarantors.

            The Company and, so long as any Securities in respect of which its
Subsidiary Guarantees have been issued are Outstanding, each of the Subsidiary
Guarantors, will:

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

            (2) file with the Trustee and the Commission, in accordance with
      rules and regulations prescribed from time to time by the Commission, such
      additional information, documents and reports with respect to compliance
      by the Company or such Subsidiary Guarantor, as the case may be, with the
      conditions and covenants of this Indenture as may be required from time to
      time by such rules and regulations; and

            (3) transmit by mail to the Holders of Securities, within 30 days
      after the filing thereof with the Trustee, in the manner and to the extent
      provided in TIA Section 313(c), such summaries of any information,
      documents and reports required to be filed by the Company or such
      Subsidiary Guarantor, as the case may be, pursuant to paragraphs (1) and
      (2) of this Section as may be required by rules and regulations prescribed
      from time to time by the Commission.

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            SECTION 704 Calculation of Original Issue Discount.

            Upon request of the Trustee, the Company shall file with the Trustee
promptly at the end of each calendar year (i) a written notice specifying the
amount of original issue discount (including daily rates and accrual periods),
if any, accrued on Outstanding Securities as of the end of such year and (ii)
such other specific information relating to such original issue discount as may
then be relevant under the Internal Revenue Code of 1986, as amended from time
to time.

                                  ARTICLE EIGHT

                  CONSOLIDATION, MERGER, CONVEYANCE OR TRANSFER

            SECTION 801 Company May Consolidate, Etc., Only on Certain Terms.

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

            (1) either the Company shall be the continuing corporation, or the
      corporation (if other than the Company) formed by such consolidation
      or into which the Company is merged or the Person which acquires by
      conveyance or transfer the properties and assets of the Company
      substantially as an entirety shall expressly assume, by an indenture
      supplemental hereto, executed and delivered to the Trustee, in form
      satisfactory to the Trustee, all of the obligations of the Company under
      this Indenture and on all the Securities and this Indenture;

            (2) immediately after giving effect to such transaction, no Default
      or Event of Default shall have occurred and be continuing; and

            (3) the Company and the successor Person have delivered to the
      Trustee an Officers' Certificate and an Opinion of Counsel each stating
      that such consolidation, merger, conveyance or transfer and such
      supplemental indenture comply with this Article and that all conditions
      precedent herein provided for relating to such transaction have been
      complied with.

            SECTION 802 Successor Person Substituted.

            Upon any consolidation or merger, or any conveyance or transfer of
the properties and assets of the Company substantially as an entirety in
accordance with Section 801, the successor corporation formed by such
consolidation or into which the Company is merged or the successor Person to
which such conveyance or transfer is made shall succeed to, and be substituted
for, and may exercise every right and power of, the Company under this

                                       62
<PAGE>   70

Indenture with the same effect as if such successor had been named as the
Company herein; and in the event of any such conveyance or transfer (except by a
lease), the Company shall be discharged from all its obligations and covenants
under this Indenture and the Securities and coupons and may be dissolved and
liquidated.

            Such successor entity thereupon may cause to be signed, and may
issue either in its own name or in the name of the Company, any or all of the
Securities issuable hereunder which theretofore shall not have been signed by
the Company and delivered to the Trustee; and, upon the order of such successor
entity, instead of the Company, and subject to all the terms, conditions and
limitations prescribed in this Indenture, the Trustee shall authenticate and
shall deliver any Securities which previously shall have been signed and
delivered by the officers of the Company to the Trustee for authentication, and
any Securities which such successor entity thereafter shall cause to be signed
and delivered to the Trustee for that purpose. All the Securities of any series
so issued shall in all respects have the same legal rank and benefit under this
Indenture as the Securities of such series theretofore or thereafter issued in
accordance with the terms of this Indenture as though all of such Securities had
been issued at the date of the execution hereof.

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

            SECTION 803 Officers' Certificate and Opinion of Counsel.

            Any consolidation, merger, sale, conveyance, assignment, transfer or
lease permitted under Section 801 is also subject to the condition that the
Trustee shall have received an Officers' Certificate and an Opinion of Counsel
to the effect that any such consolidation, merger, sale, conveyance, transfer,
assignment or lease, and the assumption by any successor Person and any such
supplemental indenture, comply with the provisions of this Article and that all
conditions precedent herein provided for relating to such transaction have been
complied with.

                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

            SECTION 901 Supplemental Indentures Without Consent of Holders.

            Without the consent of any Holders of Securities or coupons, the
Company and, if applicable, the Subsidiary Guarantors, when authorized by or
pursuant to a Board Resolution, 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:

                                       63
<PAGE>   71

            (1) to evidence the succession of another Person to the Company or
      any Subsidiary Guarantor and the assumption by any such successor of the
      covenants of the Company or such Subsidiary Guarantor herein and in the
      Securities contained; or

            (2) to add to the covenants of the Company or the Subsidiary
      Guarantors for the benefit of the Holders of all or any series of
      Securities (and if such covenants are to be for the benefit of less than
      all series of Securities, stating that such covenants are expressly being
      included solely for the benefit of such series) or to surrender any right
      or power herein conferred upon the Company or the Subsidiary Guarantors;
      or

            (3) to add any additional Events of Default for the benefit of the
      Holders of all or any series of Securities (and if such Events of Default
      are to be for the benefit of less than all series of Securities, stating
      that such Events of Default are expressly being included solely for the
      benefit of such series); provided, however, that in respect of any such
      additional Events of Default such supplemental indenture may provide for a
      particular period of grace after default (which period may be shorter or
      longer than that allowed in the case of other defaults) or may provide for
      an immediate enforcement upon such default or may limit the remedies
      available to the Trustee upon such default or may limit the right of the
      Holders of a majority in aggregate principal amount of that or those
      series of Securities to which such additional Events of Default apply to
      waive such default; or

            (4) to add to or change any of the provisions of this Indenture to
      provide that Bearer Securities may be registrable as to principal, to
      change or eliminate any restrictions on the payment of principal of or any
      premium or interest on Bearer Securities, to permit Bearer Securities to
      be issued in exchange for Registered Securities, to permit Bearer
      Securities to be issued in exchange for Bearer Securities of other
      authorized denominations or to permit or facilitate the issuance of
      Securities in uncertificated form; provided that any such action shall not
      adversely affect the interests of the Holders of Securities of any series
      or any related coupons in any material respect; or

            (5) to change or eliminate any of the provisions of this Indenture;
      provided that any such change or elimination shall become effective only
      when there is no Security Outstanding of any series created prior to the
      execution of such supplemental indenture which is entitled to the benefit
      of such provision; or

            (6) to secure the Securities pursuant to the requirements of such
      indenture supplement, if applicable; or

            (7) to establish the form or terms of Securities of any series and
      any related coupons as permitted by Sections 201 and 301, including the
      provisions and procedures relating to Securities convertible into or
      exchangeable for any securities of any Person (including the Company); or

            (8) to evidence and provide for the acceptance of appointment
      hereunder by a successor Trustee with respect to the Securities of one or
      more series and to add to or

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      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; or

            (9) to cure any ambiguity, to correct or supplement any provision
      herein which may be inconsistent with any other provision herein, or to
      make any other provisions with respect to matters or questions arising
      under this Indenture; provided that such action shall not adversely affect
      the interests of the Holders of Securities of any series or any related
      coupons in any material respect; or

            (10) to supplement any of the provisions of this Indenture to such
      extent as shall be necessary to permit or facilitate the defeasance and
      discharge of any series of Securities pursuant to Sections 401, 1402 and
      1403; provided that any such action shall not adversely affect the
      interests of the Holders of Securities of such series and any related
      coupons or any other series of Securities in any material respect; or

            (11) to add a guarantor or guarantors for any series or all series
      of the Securities; or

            (12) to comply with the requirements of the Commission in order to
      effect or maintain the qualification of this Indenture under the TIA.

            SECTION 902 Supplemental Indentures with Consent of Holders.

            With the consent of the Holders of not less than a majority in
principal amount of all Outstanding Securities affected by such supplemental
indenture, with each series voting separately, by Act of said Holders delivered
to the Company and the Trustee, the Company and, if applicable, the Subsidiary
Guarantors, when authorized by or pursuant to 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 of modifying in any manner the rights of
the Holders of Securities and any related coupons under this Indenture;
provided, however, that no such supplemental indenture shall, without the
consent of the Holder of each Outstanding Security affected thereby:

            (1) change the Stated Maturity of the principal of (or premium, if
      any, on) or any installment of principal of or interest on, any Security,
      subject to the provisions of Section 308; or reduce the principal amount
      thereof or the rate of interest (or change the manner of calculation of
      interest), thereon, or any Additional Amounts with respect thereto, or any
      premium payable upon the redemption thereof, or change any obligation of
      the Company to pay Additional Amounts pursuant to Section 1005 (except as
      contemplated by Section 801(1) and permitted by Section 901(1)), or reduce
      the portion of the principal of an Original Issue Discount Security or
      Indexed Security that would be due and payable upon a declaration of
      acceleration of the Maturity thereof pursuant to Section 502 or the amount
      thereof provable in bankruptcy pursuant to Section 504, or adversely
      affect any right of repayment at the option of the Holder of any Security,
      or change any Place of Payment where, or the Currency in which, any
      Security or any premium or interest or Additional Amount thereon is
      payable, or impair the right to institute suit for the enforcement of any
      such payment on or after the Stated Maturity

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<PAGE>   73

      thereof (or, in the case of redemption or repayment at the option of the
      Holder, on or after the Redemption Date or the Repayment Date, as the case
      may be), or adversely affect any right to convert or exchange any Security
      as may be provided pursuant to Section 301 herein, or

            (2) reduce the percentage in principal amount of the Outstanding
      Securities of any series, the consent of whose Holders is required for any
      such supplemental indenture, or the consent of whose Holders is required
      for any waiver with respect to such series (of compliance with certain
      provisions of this Indenture or certain defaults hereunder and their
      consequences) provided for in this Indenture, or reduce the requirements
      of Section 1504 for quorum or voting, or

            (3) modify any of the provisions of this Section, Section 513 or
      Section 1006, except to increase any such percentage or to provide that
      certain other provisions of this Indenture cannot be modified or waived
      without the consent of the Holder of each Outstanding Security affected
      thereby, or

            (4) cause the Securities to be expressly subordinated to other
      indebtedness of the Company.

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

            The Company may, but shall not be obligated to, fix a record date
for the purpose of determining the Persons entitled to consent to any indenture
supplemental hereto. If a record date is fixed, the Holders at the close of
Business on such record date, or their duly designated proxies, and only such
Persons, shall be entitled to consent to such supplemental indenture, whether or
not such Holders remain Holders after such record date; provided that unless
such consent shall have become effective by virtue of the requisite percentage
having been obtained prior to the date which is 90 days after such record date,
any such consent previously given shall automatically and without further action
by any Holder be cancelled and of no further effect.

            SECTION 903 Execution of Supplemental Indentures.

            In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modification thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and shall be fully protected in relying upon (subject to the provisions of
Article Six hereof), an Opinion of Counsel stating that the execution

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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 or immunities under
this Indenture or otherwise.

            SECTION 904 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
and of any coupon appertaining thereto shall be bound thereby.

            SECTION 905 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 906 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.

                                   ARTICLE TEN

                                    COVENANTS

            SECTION 1001 Payment of Principal, Premium, if any, and Interest.

            The Company covenants and agrees for the benefit of the Holders of
each series of Securities that it will duly and punctually pay the principal of
(and premium, if any) and interest and Additional Amounts, if any, on the
Securities of that series in accordance with the terms of such series of
Securities, any coupons appertaining thereto and this Indenture. Any interest
due on Bearer Securities on or before Maturity, other than Additional Amounts,
if any, payable as provided in Section 1004 in respect of principal of (or
premium, if any, on) such a Security, shall be payable only upon presentation
and surrender of the several coupons for such interest installments as are
evidenced thereby as they severally mature. Unless otherwise specified with
respect to Securities of any series pursuant to Section 301, at the option of
the Company, all payments of principal may be paid by check to the registered
Holder of the Registered Security or other person entitled thereto against
surrender of such Security or wire transfer to an account in the United States
maintained by the Payee.

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            SECTION 1002 Maintenance of Office or Agency.

            If Securities of a series are issuable only as Registered
Securities, the Company shall maintain in each Place of Payment for any series
of Securities an office or agency where Securities of that series may be
presented or surrendered for payment, where Securities of that series may be
surrendered for registration of transfer or exchange, where Securities of that
series that are convertible or exchangeable may be surrendered for conversion or
exchange, as applicable, and where notices and demands to or upon the Company in
respect of the Securities of that series and this Indenture may be served. If
Securities of a series are issuable as Bearer Securities, the Company will
maintain (A) in the Borough of Manhattan, The City of New York, an office or
agency where any Registered Securities of that series may be presented or
surrendered for payment, where any Registered Securities of that series may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange, where Securities of that series that are convertible
or exchangeable may be surrendered for conversion or exchange, as applicable,
and where notices and demands to or upon the Company in respect of the
Securities of that series and this Indenture may be served and where Bearer
Securities of that series and related coupons may be presented or surrendered
for payment in the circumstances described in the following paragraph (and not
otherwise), (B) subject to any laws or regulations applicable thereto, in a
Place of Payment for that series which is located outside the United States, an
office or agency where Securities of that series and related coupons may be
presented and surrendered for payment; provided, however, that if the Securities
of that series are listed on the Luxembourg Stock Exchange or any other stock
exchange located outside the United States and such stock exchange shall so
require, the Company will maintain a Paying Agent for the Securities of that
series in Luxembourg or any other required city located outside the United
States, as the case may be, so long as the Securities of that series are listed
on such exchange, and (C) subject to any laws or regulations applicable thereto,
in a Place of Payment for that series located outside the United States an
office or agency where any Registered Securities of that series may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange, where Securities of that series that are convertible
or exchangeable may be surrendered for conversion or exchange, as applicable and
where notices and demands to or upon the Company in respect of the Securities of
that series and this Indenture may be served. The Company will give prompt
written notice to the Trustee of the location, and any change in the location,
of each such office or agency. If at any time the Company shall fail to maintain
any such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the Corporate Trust Office of the Trustee, except that Bearer
Securities of that series and the related coupons may be presented and
surrendered for payment at the offices specified in the Security, in London,
England, and the Company hereby appoints the same as its agent to receive such
respective presentations, surrenders, notices and demands, and the Company
hereby appoints the Trustee its agent to receive all such presentations,
surrenders, notices and demands.

            Unless otherwise specified with respect to any Securities pursuant
to Section 301, no payment of principal, premium or interest on Bearer
Securities shall be made at any office or agency of the Company in the United
States or by check mailed to any address in the United States or by transfer to
an account maintained with a bank located in the United States; provided,
however, that, if the Securities of a series are payable in Dollars, payment of
principal of (and premium, if any) and interest, if any, on any Bearer Security
shall be made at the office of the

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<PAGE>   76

Company's Paying Agent in the Borough of Manhattan, The City of New York, if
(but only if) payment in Dollars of the full amount of such principal, premium
or interest, as the case may be, at all offices or agencies outside the United
States maintained for such purpose by the Company in accordance with this
Indenture, is illegal or effectively precluded by exchange controls or other
similar restrictions.

            The Company may from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all of such purposes, and may from time to time
rescind such designations; provided, however, that no such designation or
rescission shall in any manner relieve the Company of its obligation to maintain
an office or agency in accordance with the requirements set forth above for
Securities of any series for such purposes. The Company will give prompt written
notice to the Trustee of any such designation or rescission and of any change in
the location of any such other office or agency. Unless otherwise specified with
respect to any Securities pursuant to Section 301 with respect to a series of
Securities, the Company hereby designates as a Place of Payment for each series
of Securities the office or agency of the Company in the Borough of Manhattan,
The City of New York, and initially appoints the Trustee at its Corporate Trust
Office as Paying Agent in such city and as its agent to receive all such
presentations, surrenders, notices and demands.

            Unless otherwise specified with respect to any Securities pursuant
to Section 301, if and so long as the Securities of any series (i) are
denominated in a currency other than Dollars or (ii) may be payable in a
currency other than Dollars, or so long as it is required under any other
provision of the Indenture, then the Company will maintain with respect to each
such series of Securities, or as so required, at least one Exchange Rate Agent.

            SECTION 1003 Money for Securities Payments to be Held in Trust.

            If the Company or any Subsidiary or any Affiliate of any of them
shall at any time act as Paying Agent with respect to any series of any
Securities and any related coupons, it will, on or before each due date of the
principal of (or premium, if any) or interest, if any, on any of the Securities
of that series, segregate and hold in trust for the benefit of the Persons
entitled thereto a sum in the Currency in which the Securities of such series
are payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series and except, if applicable, as provided in Sections
312(b), 312(d) and 312(e)) sufficient to pay the principal (and premium, if any)
and interest, if any, on Securities of such series so becoming due until such
sums shall be paid to such Persons or otherwise disposed of as herein provided,
and will promptly notify the Trustee of its action or failure so to act.

            Whenever the Company shall have one or more Paying Agents for any
series of Securities and any related coupons, it will, on or before each due
date of the principal of (or premium, if any) or interest, if any, on any
Securities of that series, deposit with a Paying Agent a sum (in the Currency
described in the preceding paragraph) sufficient to pay the principal (or
premium, if any) or interest, if any, 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 will promptly
notify the Trustee of its action or failure so to act.

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            The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, 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, upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further liability with respect to
such sums.

            Except as otherwise provided in the Securities of any series, any
money deposited with the Trustee or any Paying Agent, or then held by the
Company or the Subsidiary Guarantors, in trust for the payment of the principal
of (or premium, if any) or interest, if any, on any Security of any series and
remaining unclaimed for two years after such principal, premium or interest has
become due and payable shall be paid to the Company upon Company Request or (if
then held by the Company or the Subsidiary Guarantors) shall be discharged from
such trust; and the Holder of such Security shall thereafter, as an unsecured
general creditor, look only to the Company and, if applicable, the Subsidiary
Guarantors for payment of such principal, premium or interest on any Security,
without interest thereon, and all liability of the Trustee or such Paying Agent
with respect to such trust money, and all liability of the Company or the
Subsidiary Guarantors as trustee thereof, shall thereupon cease; provided,
however, that the Trustee or such Paying Agent, before being required to make
any such repayment, may at the expense of the Company cause to be published
once, in an Authorized Newspaper in each Place of Payment for such series, or
mailed to each Holder of Registered Securities of such series, notice 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 publication, any unclaimed
balance of such money then remaining will be repaid to the Company.

            SECTION 1004 Corporate Existence.

            Subject to Article Eight, the Company and, so long as any Securities
in respect of which Subsidiary Guarantees have been issued are Outstanding, the
Subsidiary Guarantors shall do or cause to be done all things necessary to
preserve and keep in full force and effect its corporate existence and material
rights and franchises (charter and statutory); provided, however, that neither
the Company nor any of the Subsidiary Guarantors shall be required to preserve
any such right or franchise if it shall determine that the preservation thereof
is no longer necessary or desirable in the conduct of the business of the
Company; and provided further, however, that the foregoing shall not prohibit a
sale, transfer or conveyance of a Subsidiary or any of its assets in compliance
with the terms of the Indenture.

            SECTION 1005 Additional Amounts.

            If any Securities of a series provide for the payment of Additional
Amounts, the Company will pay to the Holder of a Security of such series or any
coupon appertaining thereto Additional Amounts as may be specified as
contemplated by Section 301. Whenever in this Indenture there is mentioned, in
any context, the payment of the principal of (or premium, if any) or interest,
if any, on any Security of any series or payment of any related coupon or the
net proceeds received on the sale or exchange of any Security of any series,
such mention shall be deemed to include mention of the payment of Additional
Amounts provided by the terms of such series established pursuant to Section 301
to the extent that, in such context, Additional Amounts

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are, were or would be payable in respect thereof pursuant to such terms and
express mention of the payment of Additional Amounts (if applicable) in any
provisions hereof shall not be construed as excluding Additional Amounts in
those provisions hereof where such express mention is not made.

            Except as otherwise specified as contemplated by Section 301, if the
Securities of a series provide for the payment of Additional Amounts, at least
10 days prior to the first Interest Payment Date with respect to that series of
Securities (or if the Securities of that series will not bear interest prior to
Maturity, the first day on which a payment of principal and any premium is
made), and at least 10 days prior to each date of payment of principal, premium
or interest if there has been any change with respect to the matters set forth
in the below-mentioned Officers' Certificate, the Company will furnish the
Trustee and the Company's principal Paying Agent or Paying Agents, if other than
the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying Agent or Paying Agents whether such payment of principal, premium or
interest on the Securities of that series shall be made to Holders of Securities
of that series or any related coupons who are not United States persons without
withholding for or on account of any tax, assessment or other governmental
charge described in the Securities of the series. If any such withholding shall
be required, then such Officers' Certificate shall specify by country the
amount, if any, required to be withheld on such payments to such Holders of
Securities of that series or related coupons and the Company will pay to the
Trustee or such Paying Agent the Additional Amounts required by the terms of
such Securities. In the event that the Trustee or any Paying Agent, as the case
may be, shall not so receive the above-mentioned certificate, then the Trustee
or such Paying Agent shall be entitled (i) to assume that no such withholding or
deduction is required with respect to any payment of principal or interest with
respect to any Securities of a series or related coupons until it shall have
received a certificate advising otherwise and (ii) to make all payments of
principal and interest with respect to the Securities of a series or related
coupons without withholding or deductions until otherwise advised. The Company
covenants to indemnify the Trustee and any Paying Agent for, and to hold them
harmless against, any loss, liability or expense reasonably incurred without
negligence or bad faith on their part arising out of or in connection with
actions taken or omitted by any of them in reliance on any Officers' Certificate
furnished pursuant to this Section or in reliance on the Company's not
furnishing such an Officers' Certificate.

            SECTION 1006 Statement as to Compliance.

            The Company and, if applicable, each of the Subsidiary Guarantors
will deliver to the Trustee, within 120 days after the end of each fiscal year,
a brief certificate from the principal executive officer, principal financial
officer or principal accounting officer as to his or her knowledge of the
Company's or such Subsidiary Guarantor's, as the case may be, compliance with
all conditions and covenants under this Indenture and, if the Company or such
Subsidiary Guarantor, as the case may be, is in default, specifying all such
defaults and the nature and status thereof of which he or she may have
knowledge. For purposes of this Section 1006, such compliance shall be
determined without regard to any period of grace or requirement of notice under
this Indenture.

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            SECTION 1007 Waiver of Certain Covenants.

            With respect to the Securities of any series, the Company and the
Subsidiary Guarantors may omit in any particular instance to comply with any
term, provision or condition specified pursuant to Section 301 as being subject
to this Section 1007, if before or after the time for such compliance the
Holders of at least a majority in principal amount of all Outstanding Securities
of such series, by Act of such Holders, waive such compliance in such instance
or generally waive compliance with such term, provision or condition, but 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 Subsidiary Guarantors and the
duties of the Trustee in respect of any such term, provision or condition shall
remain in full force and effect.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

            SECTION 1101 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 any series)
in accordance with this Article.

            SECTION 1102 Election to Redeem; Notice to Trustee.

            The election of the Company to redeem any Securities shall be
evidenced by or pursuant to a Board Resolution. In case of any redemption at the
election of the Company of less than all of the Securities of any series, the
Company shall, at least 60 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
Securities of such series to be redeemed. In the case of any redemption of
Securities prior to the expiration of any restriction on such redemption
provided in the terms of such Securities or elsewhere in this Indenture, the
Company shall furnish the Trustee with an Officers' Certificate evidencing
compliance with such restriction.

            SECTION 1103 Selection by Trustee of Securities to be Redeemed.

            If less than all the Securities of any series issued on the same day
with the same terms are to be redeemed, the particular Securities to be redeemed
shall be selected not more than 60 days prior to the Redemption Date by the
Trustee, from the Outstanding Securities of such series issued on such date with
the same terms not previously called for redemption, 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 that 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 that series.

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            The Trustee shall promptly notify the Company and the Security
Registrar (if other than itself) in writing of the Securities selected for
redemption and, in the case of any Securities selected for partial redemption,
the principal amount thereof to be redeemed.

            For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Security redeemed or to be redeemed only in part, to the
portion of the principal amount of such Security which has been or is to be
redeemed.

            SECTION 1104 Notice of Redemption.

            Notice of redemption shall be given in the manner provided in
Section 106, not less than 30 days nor more than 60 days prior to the Redemption
Date, unless a shorter period is specified by the terms of such series
established pursuant to Section 301, to each Holder of Securities to be
redeemed, but failure to give such notice in the manner herein provided to the
Holder of any Security designated for redemption as a whole or in part, or any
defect in the notice to any such Holder, shall not affect the validity of the
proceedings for the redemption of any other such Security or portion thereof.

            Any notice that is mailed to the Holders of Registered Securities in
the manner herein provided shall be conclusively presumed to have been duly
given, whether or not the Holder receives the notice.

            All notices of redemption shall state:

            (1) the Redemption Date,

            (2) the Redemption Price and accrued interest, if any, to the
      Redemption Date payable as provided in Section 1106,

            (3) if less than all Outstanding Securities of any series are to be
      redeemed, the identification (and, in the case of partial redemption, the
      principal amount) of the particular Security or Securities to be redeemed,

            (4) in case any Security is to be redeemed in part only, the notice
      which relates to such Security shall state that on and after the
      Redemption Date, upon surrender of such Security, the Holder will receive,
      without a charge, a new Security or Securities of authorized denominations
      for the principal amount thereof remaining unredeemed,

            (5) that on the Redemption Date, the Redemption Price and accrued
      interest, if any, to the Redemption Date payable as provided in Section
      1106 will become due and payable upon each such Security, or the portion
      thereof, to be redeemed and, if applicable, that interest thereon shall
      cease to accrue on and after said date,

            (6) the Place or Places of Payment where such Securities, together
      in the case of Bearer Securities with all coupons appertaining thereto, if
      any, maturing after the Redemption Date, are to be surrendered for payment
      of the Redemption Price and accrued interest, if any,

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            (7) that the redemption is for a sinking fund, if such is the case,

            (8) that, unless otherwise specified in such notice, Bearer
      Securities of any series, if any, surrendered for redemption must be
      accompanied by all coupons maturing subsequent to the date fixed for
      redemption or the amount of any such missing coupon or coupons will be
      deducted from the Redemption Price, unless security or indemnity
      satisfactory to the Company, the Trustee for such series and any Paying
      Agent is furnished,

            (9) if Bearer Securities of any series are to be redeemed and any
      Registered Securities of such series are not to be redeemed, and if such
      Bearer Securities may be exchanged for Registered Securities not subject
      to redemption on this Redemption Date pursuant to Section 305 or
      otherwise, the last date, as determined by the Company, on which such
      exchanges may be made, and

            (10) the CUSIP number of such Security, if any.

            Notice of redemption of Securities to be redeemed shall be given by
the Company or, at the Company's request, by the Trustee in the name and at the
expense of the Company.

            SECTION 1105 Deposit of Redemption Price.

            On or prior to any Redemption Date, the Company shall deposit with
the Trustee or with a Paying Agent (or, if the Company is acting as its own
Paying Agent, which it may not do in the case of a sinking fund payment under
Article Twelve, segregate and hold in trust as provided in Section 1003) an
amount of money in the Currency in which the Securities of such series are
payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series and except, if applicable, as provided in Sections
312(b), 312(d) and 312(e)) sufficient to pay on the Redemption Date the
Redemption Price of, and (unless otherwise specified pursuant to Section 301)
accrued interest on, all the Securities or portions thereof which are to be
redeemed on that date.

            SECTION 1106 Securities Payable on Redemption Date.

            Notice of redemption having been given as aforesaid, the Securities
of any series so to be redeemed shall, on the Redemption Date, become due and
payable at the Redemption Price therein specified in the Currency in which the
Securities of such series are payable (except as otherwise specified pursuant to
Section 301 for the Securities of such series and except, if applicable, as
provided in Sections 312(b), 312(d) and 312(e)) (together with accrued interest,
if any, to the Redemption Date), and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest, if any) such Securities shall if the same were interest-bearing cease
to bear interest and the coupons for such interest appertaining to any Bearer
Securities so to be redeemed, except to the extent provided below, shall be
void. Upon surrender of any such Security for redemption in accordance with said
notice, together with all coupons, if any, appertaining thereto maturing after
the Redemption Date, such Security shall be paid by the Company at the
Redemption Price, together with accrued interest, if any, to the Redemption
Date; provided, however, that installments of interest on Bearer Securities
whose Stated Maturity is on or prior to the Redemption Date shall be payable
only at an office or

                                       74
<PAGE>   82

agency located outside the United States (except as otherwise provided in
Section 1002) and, unless otherwise specified as contemplated by Section 301,
only upon presentation and surrender of coupons for such interest; and provided
further that installments of interest on Registered Securities whose Stated
Maturity is prior to (or, if specified pursuant to Section 301, on) the
Redemption Date shall be payable to the Holders of such Securities, or one or
more Predecessor Securities, registered as such at the close of business on the
relevant Record Dates according to their terms and the provisions of Section
307.

            If any Bearer Security surrendered for redemption shall not be
accompanied by all appurtenant coupons maturing after the Redemption Date, such
Security may be paid after deducting from the Redemption Price an amount equal
to the face amount of all such missing coupons, or the surrender of such missing
coupon or coupons may be waived by the Company and the Trustee if there be
furnished to them such security or indemnity as they may require to save each of
them and any Paying Agent harmless. If thereafter the Holder of such Security
shall surrender to the Trustee or any Paying Agent any such missing coupon in
respect of which a deduction shall have been made from the Redemption Price,
such Holder shall be entitled to receive the amount so deducted; provided,
however, that interest represented by coupons shall be payable only at an office
or agency located outside the United States (except as otherwise provided in
Section 1002) and, unless otherwise specified as contemplated by Section 301,
only upon presentation and surrender of those coupons.

            If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the Redemption Price shall, until paid, bear
interest from the Redemption Date at the rate of interest set forth in such
Security or, in the case of an Original Issue Discount Security, at the Yield to
Maturity of such Security.

            SECTION 1107 Securities Redeemed in Part.

            Any Registered Security which is to be redeemed only in part
(pursuant to the provisions of this Article or of Article Twelve) shall be
surrendered 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) and 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 as requested by such Holder in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered. However, if less than all the Securities of any
series with differing issue dates, interest rates and stated maturities are to
be redeemed, the Company in its sole discretion shall select the particular
Securities to be redeemed and shall notify the Trustee in writing thereof at
least 45 days prior to the relevant redemption date.

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<PAGE>   83

                                 ARTICLE TWELVE

                                  SINKING FUNDS

            SECTION 1201 Applicability of Article.

            The provisions of this Article shall be applicable to any sinking
fund for the retirement of Securities of a 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 such Securities of any series is herein referred to as an "optional
sinking fund payment". If provided for by the terms of any Securities of any
series, the cash amount of any mandatory sinking fund payment may be subject to
reduction as provided in Section 1202. Each sinking fund payment shall be
applied to the redemption of Securities of any series as provided for by the
terms of Securities of such series.

            SECTION 1202 Satisfaction of Sinking Fund Payments with Securities.

            Except as otherwise specifically contemplated by Section 301 for
Securities of such series, the Company may, in satisfaction of all or any part
of any mandatory sinking fund payment with respect to the Securities of a
series, (1) deliver Outstanding Securities of such series (other than any
previously called for redemption) together in the case of any Bearer Securities
of such series with all unmatured coupons appertaining thereto and (2) 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, as provided for by the terms of such Securities; provided that
such Securities so delivered or applied as a credit have not been previously so
credited. Such Securities shall be received and credited for such purpose by the
Trustee at the applicable 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 1203 Redemption of Securities for Sinking Fund.

            Not less than 60 days prior to each sinking fund payment date for
Securities of any series, the Company will deliver to the Trustee an Officers'
Certificate specifying the amount of the next ensuing mandatory sinking fund
payment for that series pursuant to the terms of that series, the portion
thereof, if any, which is to be satisfied by payment of cash in the Currency in
which the Securities of such series are payable (except as otherwise specified
pursuant to Section 301 for the Securities of such series and except, if
applicable, as provided in Sections 312(b), 312(d) and 312(e)) and the portion
thereof, if any, which is to be satisfied by delivering and crediting Securities
of that series pursuant to Section 1202, and the optional amount, if any, to be
added in cash to the next ensuing mandatory sinking fund payment, and will also
deliver to the Trustee any Securities to be so delivered and credited. If such
Officers'

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<PAGE>   84

Certificate shall specify an optional amount to be added in cash to the next
ensuing mandatory sinking fund payment, the Company shall thereupon be obligated
to pay the amount therein specified. 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 1103 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 1104. Such notice
having been duly given, the redemption of such Securities shall be made upon the
terms and in the manner stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

            SECTION 1301 Applicability of Article.

            Repayment of Securities of any series before their Stated Maturity
at the option of Holders thereof shall be made in accordance with the terms of
such Securities and (except as otherwise specified by the terms of such series
established pursuant to Section 301) in accordance with this Article.

            SECTION 1302 Repayment of Securities.

            Securities of any series subject to repayment in whole or in part at
the option of the Holders thereof will, unless otherwise provided in the terms
of such Securities, be repaid at the Repayment Price thereof, together with
interest, if any, thereon accrued to the Repayment Date specified in or pursuant
to the terms of such Securities. The Company covenants that on or before the
Repayment Date it will deposit with the Trustee or with a Paying Agent (or, if
the Company or any Subsidiary or any Affiliate of any of them is acting as
Paying Agent, segregate and hold in trust as provided in Section 1003) an amount
of money in the Currency in which the Securities of such series are payable
(except as otherwise specified pursuant to Section 301 for the Securities of
such series and except, if applicable, as provided in Sections 312(b), 312(d)
and 312(e)) sufficient to pay the Repayment Price of, and (unless otherwise
specified pursuant to Section 301) accrued interest on, all the Securities or
portions thereof, as the case may be, to be repaid on such date.

            SECTION 1303 Exercise of Option.

            Securities of any series subject to repayment at the option of the
Holders thereof will contain an "Option to Elect Repayment" form on the reverse
of such Securities. To be repaid at the option of the Holder, any Security so
providing for such repayment, with the "Option to Elect Repayment" form on the
reverse of such Security duly completed by the Holder (or by the Holder's
attorney duly authorized in writing), must be received by the Company at the
Place of Payment therefor specified in the terms of such Security (or at such
other place or places of which the Company shall from time to time notify the
Holders of such Securities) not earlier than 45 days nor later than 30 days
prior to the Repayment Date. If less than the entire Repayment Price of such
Security is to be repaid in accordance with the terms of such Security, the
portion of the Repayment Price of such Security to be repaid, in increments of
the minimum

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<PAGE>   85

denomination for Securities of such series, and the denomination or
denominations of the Security or Securities to be issued to the Holder for the
portion of such Security surrendered that is not to be repaid, must be
specified. Any Security providing for repayment at the option of the Holder
thereof may not be repaid in part if, following such repayment, the unpaid
principal amount of such Security would be less than the minimum authorized
denomination of Securities of the series of which such Security to be repaid is
a part. Except as otherwise may be provided by the terms of any Security
providing for repayment at the option of the Holder thereof, exercise of the
repayment option by the Holder shall be irrevocable unless waived by the
Company.

            SECTION 1304 When Securities Presented for Repayment Become Due and
Payable.

            If Securities of any series providing for repayment at the option of
the Holders thereof shall have been surrendered as provided in this Article and
as provided by or pursuant to the terms of such Securities, such Securities or
the portions thereof, as the case may be, to be repaid shall become due and
payable and shall be paid by the Company on the Repayment Date therein
specified, and on and after such Repayment Date (unless the Company and, if
applicable, the Subsidiary Guarantors shall default in the payment of such
Securities on such Repayment Date) such Securities shall, if the same were
interest-bearing, cease to bear interest and the coupons for such interest
appertaining to any Bearer Securities so to be repaid, except to the extent
provided below, shall be void. Upon surrender of any such Security for repayment
in accordance with such provisions, together with all coupons, if any,
appertaining thereto maturing after the Repayment Date, the Repayment Price of
such Security so to be repaid shall be paid by the Company, together with
accrued interest, if any, to the Repayment Date; provided, however, that coupons
whose Stated Maturity is on or prior to the Repayment Date shall be payable only
at an office or agency located outside the United States (except as otherwise
provided in Section 1002) and, unless otherwise specified pursuant to Section
301, only upon presentation and surrender of such coupons; and provided further
that installments of interest on Registered Securities, whose Stated Maturity is
prior to (or, if specified pursuant to Section 301, on) the Repayment Date shall
be payable (but without interest thereon, unless the Company shall default in
the payment thereof) to the Holders of such Securities, or one or more
Predecessor Securities, registered as such at the close of business on the
relevant Record Dates according to their terms and the provisions of Section
307.

            If any Bearer Security surrendered for repayment shall not be
accompanied by all appurtenant coupons maturing after the Repayment Date, such
Security may be paid after deducting from the amount payable therefor as
provided in Section 1302 an amount equal to the face amount of all such missing
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and, if applicable, the Subsidiary Guarantors and the Trustee if there
be furnished to them such security or indemnity as they may require to save each
of them and any Paying Agent harmless. If thereafter the Holder of such Security
shall surrender to the Trustee or any Paying Agent any such missing coupon in
respect of which a deduction shall have been made as provided in the preceding
sentence, such Holder shall be entitled to receive the amount so deducted;
provided, however, that interest represented by coupons shall be payable only at
an office or agency located outside the United States (except as otherwise
provided in

                                       78
<PAGE>   86

Section 1002) and, unless otherwise specified as contemplated by Section 301,
only upon presentation and surrender of those coupons.

            If any Security surrendered for repayment shall not be so repaid
upon surrender thereof, the Repayment Price shall, until paid, bear interest
from the Repayment Date at the rate of interest set forth in such Security or,
in the case of an Original Issue Discount Security, at the Yield to Maturity of
such Security.

            SECTION 1305 Securities Repaid in Part.

            Upon surrender of any Registered Security which is to be repaid in
part only, the Company shall execute and the Trustee shall authenticate and
deliver to the Holder of such Security, without service charge and at the
expense of the Company, a new Registered Security or Securities of the same
series, of any authorized denomination specified by the Holder, in an aggregate
principal amount equal to and in exchange for the portion of the principal of
such Security so surrendered which is not to be repaid.

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

            SECTION 1401 Applicability of Article; Company's Option to Effect
Defeasance or Covenant Defeasance.

            If pursuant to Section 301 provision is made for either or both of
(a) defeasance of the Securities of or within a series under Section 1402 or (b)
covenant defeasance of the Securities of or within a series under Section 1403,
then the provisions of such Section or Sections, as the case may be, together
with the other provisions of this Article (with such modifications thereto as
may be specified pursuant to Section 301 with respect to any Securities), shall
be applicable to such Securities and any coupons appertaining thereto, and the
Company may at its option by Board Resolution, at any time, with respect to such
Securities and any coupons appertaining thereto, elect to have Section 1402 (if
applicable) or Section 1403 (if applicable) be applied to such Outstanding
Securities and any coupons appertaining thereto upon compliance with the
conditions set forth below in this Article.

            SECTION 1402 Defeasance and Discharge.

            Upon the Company's exercise of the above option applicable to this
Section with respect to any Securities of or within a series, the Company and,
if applicable, the Subsidiary Guarantors shall each be deemed to have been
discharged from its obligations with respect to such Outstanding Securities and
any coupons appertaining thereto on the date the conditions set forth in Section
1404 are satisfied (hereinafter, "defeasance"). For this purpose, such
defeasance means that the Company shall be deemed to have paid and discharged
the entire indebtedness represented by such Outstanding Securities and any
coupons appertaining thereto, which shall thereafter be deemed to be
"Outstanding" only for the purposes of Section 1405 and the other Sections of
this Indenture referred to in clauses (A) and (B) of this Section, and to have
satisfied all its other obligations under such Securities and any coupons
appertaining thereto and this

                                       79
<PAGE>   87

Indenture insofar as such Securities and any coupons appertaining thereto are
concerned (and the Trustee, at the expense of the Company, shall execute proper
instruments acknowledging the same), except for the following which shall
survive until otherwise terminated or discharged hereunder: (A) the rights of
Holders of such Outstanding Securities and any coupons appertaining thereto to
receive, solely from the trust fund described in Section 1404 and as more fully
set forth in such Section, payments in respect of the principal of (and premium,
if any) and interest, if any, on such Securities and any coupons appertaining
thereto when such payments are due, (B) the obligations of the Company and, to
the extent applicable, the Subsidiary Guarantors with respect to such Securities
under Sections 305, 306, 1002 and 1003 and with respect to the payment of
Additional Amounts, if any, on such Securities as contemplated by Section 1004
with respect to the rights, if any, of the holders of such Securities to require
the Company and, to the extent applicable, the Subsidiary Guarantors to repay
such Securities as contemplated by Article Thirteen and with respect to the
rights, if any, of holders to convert or exchange such Securities into other
Securities, (C) the rights, powers, trusts, duties and immunities of the Trustee
hereunder and (D) this Article. Subject to compliance with this Article
Fourteen, the Company may exercise its option under this Section notwithstanding
the prior exercise of its option under Section 1403 with respect to such
Securities and any coupons appertaining thereto.

            SECTION 1403 Covenant Defeasance.

            Upon the Company's exercise of the above option applicable to this
Section with respect to any Securities of or within a series, the Company and,
if applicable, the Subsidiary Guarantors shall each be released from its
obligations under Section 1005 if specified pursuant to Section 301, its
obligations under any other covenant, with respect to such Outstanding
Securities and any coupons appertaining thereto on and after the date the
conditions set forth in Section 1404 are satisfied (hereinafter, "covenant
defeasance"), and such Securities and any coupons appertaining thereto shall
thereafter be deemed to be not "Outstanding" for the purposes of any direction,
waiver, consent or declaration or Act of Holders (and the consequences of any
thereof) in connection with [any restrictive covenants that may be inserted], or
such other covenant, but shall continue to be deemed "Outstanding" for all other
purposes hereunder. For this purpose, such covenant defeasance means that, with
respect to such Outstanding Securities and any coupons appertaining thereto, the
Company and the Subsidiary Guarantors may omit to comply with and shall have no
liability in respect of any term, condition or limitation set forth in any such
Section or such other covenant, whether directly or indirectly, by reason of any
reference elsewhere herein to any such Section or such other covenant or by
reason of reference in any such Section or such other covenant to any other
provision herein or in any other document and such omission to comply shall not
constitute a Default or an Event of Default under Section 501(4) or 501(7) or
otherwise except as specified in accordance with Section 301, as the case may
be, but, except as specified above, the remainder of this Indenture and such
Securities and any coupons appertaining thereto shall be unaffected thereby.

            SECTION 1404 Conditions to Defeasance or Covenant Defeasance.

            The following shall be the conditions to application of Section 1402
or Section 1403 to any Outstanding Securities of or within a series and any
coupons appertaining thereto:

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<PAGE>   88

            (a) The Company shall irrevocably have deposited or caused to be
      deposited with the Trustee (or another trustee satisfying the requirements
      of Section 607 who shall agree to comply with the provisions of this
      Article Fourteen applicable to it) as trust funds in trust for the purpose
      of making the following payments, specifically pledged as security for,
      and dedicated solely to, the benefit of the Holders of such Securities and
      any coupons appertaining thereto, (1) an amount (in such Currency in which
      such Securities and any coupons appertaining thereto are then specified as
      payable at Stated Maturity), or (2) Government Obligations applicable to
      such Securities and coupons appertaining thereto (determined on the basis
      of the Currency in which such Securities and coupons appertaining thereto
      are then specified as payable at Stated Maturity) which through the
      scheduled payment of principal and interest in respect thereof in
      accordance with their terms will provide, not later than one day before
      the due date of any payment of principal of (and premium, if any) and
      interest, if any, on such Securities and any coupons appertaining thereto,
      money in an amount, or (3) a combination thereof in an amount, sufficient,
      in the opinion of a nationally recognized firm of independent public
      accountants or nationally recognized independent investment banking firm
      expressed in a written certification thereof delivered to the Trustee, to
      pay and discharge, and which shall be applied by the Trustee (or other
      qualifying trustee) to pay and discharge, (i) the principal of (and
      premium, if any) and interest, if any, on such Outstanding Securities and
      any coupons appertaining thereto on the Stated Maturity of such principal
      or installment of principal or interest and (ii) any mandatory sinking
      fund payments or analogous payments applicable to such Outstanding
      Securities and any coupons appertaining thereto on the day on which such
      payments are due and payable in accordance with the terms of this
      Indenture and of such Securities and any coupons appertaining thereto.

            (b) Such defeasance or covenant defeasance shall not result in a
      breach or violation of, or constitute a default under, this Indenture or
      any other material agreement or instrument to which the Company is a party
      or by which it is bound.

            (c) No Default or Event of Default with respect to such Securities
      and any coupons appertaining thereto shall have occurred and be continuing
      on the date of such deposit or, insofar as Sections 501(5) and 501(6) are
      concerned, at any time during the period ending on the 91st day after the
      date of such deposit (it being understood that this condition shall not be
      deemed satisfied until the expiration of such period).

            (d) In the case of an election under Section 1402, the Company shall
      have delivered to the Trustee an Opinion of Counsel stating that (i) the
      Company has received from, or there has been published by, the Internal
      Revenue Service a ruling, or (ii) since the date of execution of this
      Indenture, there has been a change in the applicable Federal income tax
      law, in either case to the effect that, and based thereon such opinion
      shall confirm that, the Holders of such Outstanding Securities and any
      coupons appertaining thereto will not recognize income, gain or loss for
      Federal income tax purposes as a result of such defeasance and will be
      subject to Federal income tax on the same amounts, in the same manner and
      at the same times as would have been the case if such defeasance had not
      occurred.

                                       81
<PAGE>   89

            (e) In the case of an election under Section 1403, the Company shall
      have delivered to the Trustee an Opinion of Counsel to the effect that the
      Holders of such Outstanding Securities and any coupons appertaining
      thereto will not recognize income, gain or loss for Federal income tax
      purposes as a result of such covenant defeasance and will be subject to
      Federal income tax on the same amounts, in the same manner and at the same
      times as would have been the case if such covenant defeasance had not
      occurred.

            (f) The Company shall have delivered to the Trustee an Officers'
      Certificate and an Opinion of Counsel, each stating that all conditions
      precedent to the defeasance under Section 1402 or the covenant defeasance
      under Section 1403 (as the case may be) have been complied with and an
      Opinion of Counsel to the effect that either (i) as a result of a deposit
      pursuant to subsection (a) above and the related exercise of the Company's
      option under Section 1402 or Section 1403 (as the case may be),
      registration is not required under the Investment Company Act of 1940, as
      amended, by the Company, with respect to the trust funds representing such
      deposit or by the trustee for such trust funds or (ii) all necessary
      registrations under said Act have been effected.

            (g) Notwithstanding any other provisions of this Section, such
      defeasance or covenant defeasance shall be effected in compliance with any
      additional or substitute terms, conditions or limitations which may be
      imposed on the Company in connection therewith pursuant to Section 301.

            SECTION 1405 Deposited Money and Government Obligations to Be Held
in Trust; Other Miscellaneous Provisions.

            Subject to the provisions of the last paragraph of Section 1003, all
money and Government Obligations (or other property as may be provided pursuant
to Section 301) (including the proceeds thereof) deposited with the Trustee (or
other qualifying trustee, collectively for purposes of this Section 1405, the
"Trustee") pursuant to Section 1404 in respect of any Outstanding Securities of
any series and any coupons appertaining thereto shall be held in trust and
applied by the Trustee, in accordance with the provisions of such Securities and
any coupons appertaining thereto and this Indenture, to the payment, either
directly or through any Paying Agent (including the Company acting as its own
Paying Agent) as the Trustee may determine, to the Holders of such Securities
and any coupons appertaining thereto of all sums due and to become due thereon
in respect of principal (and premium, if any) and interest, if any, but such
money need not be segregated from other funds except to the extent required by
law.

            Unless otherwise specified with respect to any Security pursuant to
Section 301, if, after a deposit referred to in Section 1404(a) has been made,
(a) the Holder of a Security in respect of which such deposit was made is
entitled to, and does, elect pursuant to Section 312(b) or the terms of such
Security to receive payment in a Currency other than that in which the deposit
pursuant to Section 1404(a) has been made in respect of such Security, or (b) a
Conversion Event occurs as contemplated in Section 312(d) or 312(e) or by the
terms of any Security in respect of which the deposit pursuant to Section
1404(a) has been made, the indebtedness represented by such Security and any
coupons appertaining thereto shall be deemed to have been, and will be, fully
discharged and satisfied through the payment of the principal of (and premium,
if any) and interest, if any, on such Security as the same becomes due out of
the

                                       82
<PAGE>   90

proceeds yielded by converting (from time to time as specified below in the case
of any such election) the amount or other property deposited in respect of such
Security into the Currency in which such Security becomes payable as a result of
such election or Conversion Event based on the applicable Market Exchange Rate
for such Currency in effect on the second Business Day prior to each payment
date, except, with respect to a Conversion Event, for such Currency in effect
(as nearly as feasible) at the time of the Conversion Event.

            The Company shall pay and indemnify the Trustee against any tax, fee
or other charge imposed on or assessed against the Government Obligations
deposited pursuant to Section 1404 or the principal and interest received in
respect thereof other than any such tax, fee or other charge which by law is for
the account of the Holders of such Outstanding Securities and any coupons
appertaining thereto.

            Anything in this Article to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon Company
Request any money or Government Obligations (or other property and any proceeds
therefrom) held by it as provided in Section 1404 which, in the opinion of a
nationally recognized firm of independent public accountants expressed in a
written certification thereof delivered to the Trustee, are in excess of the
amount thereof which would then be required to be deposited to effect a
defeasance or covenant defeasance, as applicable, in accordance with this
Article.

                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

            SECTION 1501 Purposes for Which Meetings May Be Called.

            If Securities of a series are issuable as Bearer Securities, a
meeting of Holders of Securities of such 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 1502 Call, Notice and Place of Meetings.

            The Company may at any time call a meeting of Holders of Securities
of any series for any purpose specified in Section 1501, to be held at such time
and at such place in the Borough of Manhattan, The City of New York or in London
as the Company shall determine. Notice of every meeting of Holders of Securities
of any series, 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.

            SECTION 1503 Persons Entitled to Vote at Meetings.

            To be entitled to vote at any meeting of Holders of Securities of
any series, a Person shall be (1) a Holder of one or more Outstanding Securities
of such series, or (2) a Person

                                       83
<PAGE>   91

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 be present or to speak at 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 1504 Quorum; Action.

            The Persons entitled to vote a majority in principal amount of the
Outstanding Securities of a series 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 with respect to a consent or waiver which this
Indenture expressly provides may be given by the Holders of not less than a
specified percentage in principal amount of the Outstanding Securities of a
series, the Persons entitled to vote such specified percentage in principal
amount of the Outstanding Securities of such series shall constitute a quorum.
In the absence of a quorum within 30 minutes 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
a period of not less than 10 days as 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 a period
of not less than 10 days as determined by the chairman of the meeting prior to
the adjournment of such adjourned meeting. Notice of the reconvening of any
adjourned meeting shall be given as provided in Section 1502(a), except that
such notice need be given only once not less than five days prior to the date on
which the meeting is scheduled to be reconvened. Notice of the reconvening of
any 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.

            Except as limited by the proviso to Section 902, any resolution
presented to a meeting or adjourned meeting duly reconvened at which a quorum is
present as aforesaid may be adopted by the affirmative vote of the Holders of a
majority in principal amount of the Outstanding Securities of that series;
provided, however, that, except as limited by the proviso to Section 902, any
resolution with respect to any request, demand, authorization, direction,
notice, consent, waiver or other action which this Indenture expressly provides
may be made, given or taken by the Holders of a specified percentage, which is
less than a majority, in principal amount of the Outstanding Securities of a
series 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 that series.

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

            Notwithstanding the foregoing provisions of this Section 1504, if
any action is to be taken at a meeting of Holders of Securities of any series
with respect to any request, demand, authorization, direction, notice, consent,
waiver or other action that this Indenture expressly

                                       84
<PAGE>   92

provides may be made, given or taken by the Holders of a specified percentage in
principal amount of all Outstanding Securities affected thereby, or of the
Holders of such series and one or more additional series:

            (A) there shall be no minimum quorum requirement for such meeting;
      and

            (B) the principal amount of the Outstanding Securities of such
      series that vote in favor of such request, demand, authorization,
      direction, notice, consent, waiver or other action shall be taken into
      account in determining whether such request, demand, authorization,
      direction, notice, consent, waiver or other action has been made, given or
      taken under this Indenture.

            SECTION 1505 Determination of Voting Rights; Conduct and Adjournment
of Meetings.

            (a) Notwithstanding any provisions of this Indenture, the Company
may make such reasonable regulations as it may deem advisable for any meeting of
Holders of Securities of a series in regard to proof of the holding of
Securities of such series 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
or by having the signature of the Person executing the proxy witnessed or
guaranteed by any trust company, bank or banker authorized by Section 104 to
certify to the holding of Bearer Securities. 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.

            (b) The Company shall, by an instrument in writing appoint a
temporary chairman of the meeting, unless the meeting shall have been called by
Holders of Securities as provided in Section 1502(b), in which case the Holders
of Securities of the series calling the meeting 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 majority in
principal amount of the Outstanding Securities of such series represented at the
meeting.

            (c) At any meeting each Holder of a Security of such series or proxy
shall be entitled to one vote for each $1,000 principal amount of the
Outstanding Securities of such series 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 of such series or proxy.

            (d) Any meeting of Holders of Securities of any series duly called
pursuant to Section 1502 at which a quorum is present may be adjourned from time
to time by Persons

                                       85
<PAGE>   93

entitled to vote a majority in principal amount of the Outstanding Securities of
such series represented at the meeting, and the meeting may be held as so
adjourned without further notice.

            SECTION 1506 Counting Votes and Recording Action of Meetings.

            The vote upon any resolution submitted to any meeting of Holders of
Securities of any series shall be by written ballots on which shall be
subscribed the signatures of the Holders of Securities of such series or of
their representatives by proxy and the principal amounts and serial numbers of
the Outstanding Securities of such series 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 in duplicate of all votes cast at the meeting. A record, at least in
duplicate, of the proceedings of each meeting of Holders of Securities of any
Series 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 fact, setting forth a copy of the notice of the meeting and
showing that said notice was given as provided in Section 1502 and, if
applicable, Section 1504. 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 former 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.

                                 ARTICLE SIXTEEN

                                   GUARANTEES

            SECTION 1601 Guarantees.

            If Securities of or within a series are specified, as contemplated
by Section 301, to be guaranteed by the Subsidiary Guarantors, then each of the
Subsidiary Guarantors hereby fully and unconditionally guarantees, jointly and
severally, to each Holder of any such Security which is authenticated and
delivered by the Trustee and to each Holder of any coupon appertaining to any
such Security, if any, and to the Trustee on behalf of each such Holder, the due
and punctual payment of the principal of (and premium, if any, on) and interest
(including, in case of default, interest on principal and, to the extent
permitted by applicable law, on overdue interest and including any additional
interest required to be paid according to the terms of any such Security or any
coupon appertaining thereto), if any, on each such Security, and the due and
punctual payment of any sinking fund payment (or analogous obligation), if any,
provided for with respect to any such Security, when and as the same shall
become due and payable, whether at Stated Maturity, upon redemption, upon
acceleration, upon tender for repayment at the option of any Holder or
otherwise, according to the terms thereof and of this Indenture, including,
without limitation, the payment of any Additional Amounts, if any, provided for
with respect to any such Security as described under Section 1005 hereof (the
"Guarantor Obligations"). In case of the failure of the Company or any successor
thereto punctually to pay any such principal, premium, interest or sinking fund
payment, each of the Subsidiary Guarantors hereby agrees to cause any

                                       86
<PAGE>   94

such payment to be made punctually when and as the same shall become due and
payable, whether at Stated Maturity, upon redemption, upon declaration of
acceleration, upon tender for repayment at the option of any Holder or
otherwise, as if such payment were made by the Company.

            Each of the Subsidiary Guarantors hereby agrees that its Guarantor
Obligations hereunder shall be as if it were principal debtor and not merely
surety and shall be absolute and unconditional, irrespective of the identity of
the Company, the validity, regularity or enforceability of any such Security or
coupon appertaining thereto or this Indenture, the absence of any action to
enforce the same, any waiver or consent by the Holder of any such Security or
coupon appertaining thereto with respect to any provisions thereof, the recovery
of any judgment against the Company or any action to enforce the same, or any
other circumstance which might otherwise constitute a legal or equitable
discharge or defense of a Subsidiary Guarantor. Each of the Subsidiary
Guarantors hereby waives diligence, presentment, demand of payment, filing of
claims with a court in the event of insolvency or bankruptcy of the Company, any
right to require a proceeding first against the Company, protest, notice and all
demands whatsoever and covenants that its Subsidiary Guarantee will not be
discharged except by complete performance of its obligations contained in any
such Security or coupon appertaining thereto and in its Subsidiary Guarantee.

            If the Trustee or the Holder of any Security or any coupon
appertaining thereto is required by any court or otherwise to return to the
Company or any Subsidiary Guarantor, or any custodian, receiver, liquidator,
assignee, trustee, sequestrator or other similar official acting in relation to
the Company or such Subsidiary Guarantor, any amount paid to the Trustee or such
Holder in respect of a Security or any coupons appertaining thereto, the related
Subsidiary Guarantee, to the extent theretofore discharged, shall be reinstated
in full force and effect. Each of the Subsidiary Guarantors further agrees, to
the fullest extent that it may lawfully do so, that, as between such Subsidiary
Guarantor, on the one hand, and the Holders and the Trustee, on the other hand,
the maturity of the obligations guaranteed hereby may be accelerated as provided
in Article Five hereof for the purposes of this Subsidiary Guarantee,
notwithstanding any stay, injunction or other prohibition extant under any
applicable bankruptcy law preventing such acceleration in respect of the
obligations guaranteed hereby.

            Each of the Subsidiary Guarantors shall be subrogated to all rights
of the Holders of the Securities of a series (and of any coupons appertaining
thereto) against the Company in respect of any amounts paid by such Subsidiary
Guarantor on account of such Securities or any coupons appertaining thereto or
this Indenture; provided, however, that such Subsidiary Guarantor shall not be
entitled to enforce or to receive any payments arising out of, or based upon,
such right of subrogation until the principal of (and premium, if any, on) and
interest, if any, on all Securities of such series shall have been indefeasibly
paid in full.

            SECTION 1602 Execution and Delivery of Guarantees.

            To evidence the Subsidiary Guarantees with respect to Securities of
or within any series that are specified, as contemplated by Section 301, to be
guaranteed by the Subsidiary Guarantors, each of the Subsidiary Guarantors
hereby agrees to execute its Subsidiary Guarantee, in a form established
pursuant to Section 201, to be endorsed on each Security of such series

                                       87
<PAGE>   95

authenticated and delivered by the Trustee. Each such Subsidiary Guarantee shall
be executed on behalf of such Subsidiary Guarantor by its Chairman of the Board,
the Chief Executive Officer, the Chief Operating Officer, the Financial Officer,
or its President, or one of its Executive Vice Presidents or Vice Presidents, or
by its Treasurer or one of its Assistant Treasurers and attested by its
Secretary or one of its Assistant Secretaries. The signature of any of these
officers on the Subsidiary Guarantees may be manual or facsimile.

            Any Subsidiary Guarantee bearing the manual or facsimile signatures
of the individuals who were the proper officers of any Subsidiary Guarantor
shall bind such Subsidiary Guarantor, notwithstanding that such individuals or
any of them have ceased to hold such offices prior to the authentication and
delivery of the Securities upon which such Subsidiary Guarantee are endorsed or
did not hold such offices at the date of such Securities.

            The delivery of any Securities by the Trustee, after the
authentication thereof hereunder, shall constitute due delivery of the
Subsidiary Guarantees endorsed thereon on behalf of the Subsidiary Guarantors.
Each of the Subsidiary Guarantors hereby agrees that its Subsidiary Guarantee
set forth in this Article Thirteen shall remain in full force and effect
notwithstanding any failure to endorse on each Security a notation of such
Subsidiary Guarantee.

            SECTION 1603 Limitation of Guarantor's Liability.

            Each of the Subsidiary Guarantors, and by its acceptance of a
Security each Holder, hereby confirms that it is the intention of all such
parties that in no event shall any Guarantor Obligations under the Subsidiary
Guarantees constitute or result in a fraudulent transfer or conveyance for
purposes of, or result in a violation of, any United States federal, or
applicable United States state, fraudulent transfer or conveyance or similar
law. To effectuate the foregoing intention, in the event that the Guarantor
Obligations of any Subsidiary Guarantor in respect of the Securities of any
series would, but for this sentence, constitute or result in such a fraudulent
transfer or conveyance or violation, then the liability of such Subsidiary
Guarantor under its Subsidiary Guarantee in respect of the Securities of such
series shall be reduced to the extent necessary to eliminate such fraudulent
transfer or conveyance or violation under the applicable fraudulent transfer or
conveyance or similar law.

                                    * * * * *

                                       88
<PAGE>   96

            This Indenture 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 Indenture.

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

                                   QUEST DIAGNOSTICS INCORPORATED

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS HOLDINGS INCORPORATED

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS CLINICAL LABORATORIES, INC.

                                   By ___________________________
                                      Name:
                                      Title:
Attest:

___________________________
Name:
Title:

                                       89
<PAGE>   97

                                   QUEST DIAGNOSTICS INCORPORATED (CA)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS INCORPORATED (MD)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS LLC

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       90
<PAGE>   98

                                   QUEST DIAGNOSTICS INCORPORATED (MI)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS INCORPORATED (CT)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                  QUEST DIAGNOSTICS INCORPORATED (MA)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       91
<PAGE>   99

                                   QUEST DIAGNOSTICS OF PENNSYLVANIA INC.

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS INCORPORATED (OH)

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   METWEST INC.

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       92
<PAGE>   100

                                   NICHOLS INSTITUTE DIAGNOSTICS

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   DPD HOLDINGS, INC.

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   DIAGNOSTICS REFERENCE SERVICES INC.

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       93
<PAGE>   101

                                   LABORATORY HOLDINGS INCORPORATED

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS INVESTMENTS INCORPORATED

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   QUEST DIAGNOSTICS FINANCE INCORPORATED

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       94
<PAGE>   102

                                   PATHOLOGY BUILDING PARTNERSHIP

                                   By Quest Diagnostics Incorporated (MD),
                                      General Partner

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                   THE BANK OF NEW YORK
                                       as Trustee

                                   By ___________________________
                                      Name:
                                      Title:

Attest:

___________________________
Name:
Title:

                                       95
<PAGE>   103

                                    EXHIBIT A

                              FORMS OF CERTIFICATES
<PAGE>   104

                                   EXHIBIT A-1

               FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
                TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST
                       PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

     [Insert title or sufficient description of Securities to be delivered]

            This is to certify that, as of the date hereof, and except as set
forth below, the above-captioned Securities held by you for our account (i) are
owned by person(s) that are not citizens or residents of the United States,
domestic partnerships, domestic corporations or any estate or trust the income
of which is subject to United States federal income taxation regardless of its
source ("United States person(s)"), (ii) are owned by United States person(s)
that are (a) foreign branches of United States financial institutions (financial
institutions, as defined in United States Treasury Regulations Section
1.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial institutions
and who hold the Securities through such United States financial institutions on
the date hereof (and in either case (a) or (b), each such United States
financial institution hereby agrees, on its own behalf or through its agent,
that you may advise John Deere Capital Corporation or its agent that such
financial institution will comply with the requirements of Section 165(j)(3)(A),
(B) or (C) of the United States Internal Revenue Code of 1986, as amended, and
the regulations thereunder), or (iii) are owned by United States or foreign
financial institution(s) for purposes of resale during the restricted period (as
defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)),
and, in addition, if the owner is a United States or foreign financial
institution described in clause (iii) above (whether or not also described in
clause (i) or (ii)), this is to further certify that such financial institution
has not acquired the Securities for purposes of resale directly or indirectly to
a United States person or to a person within the United States or its
possessions.

            As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

            We undertake to advise you promptly by tested telex on or prior to
the date on which you intend to submit your certification relating to the
above-captioned Securities held by you for our account in accordance with your
Operating Procedures if any applicable statement herein is not correct on such
date, and in the absence of any such notification it may be assumed that this
certification applies as of such date.

            This certificate excepts and does not relate to [U.S.$] ___________
of such interest in the above-captioned Securities in respect of which we are
not able to certify and as to which we understand an exchange for an interest in
a Permanent Global Security or an exchange for and delivery of definitive
Securities (or, if relevant, collection of any interest) cannot be made until we
do so certify.

<PAGE>   105

            We understand that this certificate may be required in connection
with certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated: ___________

[To be dated no earlier than the 15th day
prior to (i) the Exchange Date or (ii) the
relevant Interest Payment Date occurring prior
to the Exchange Date, as applicable]
[Name of Person Making Certification]

                                    ___________________________________
                                    (Authorized Signatory)
                                    Name:
                                    Title:

                                      A-1-2
<PAGE>   106

                                   EXHIBIT A-2

                FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR AND
           CLEARSTREAM BANKING SOCIETE ANONYME IN CONNECTION WITH THE
                                   EXCHANGE OF
                    A PORTION OF A TEMPORARY GLOBAL SECURITY
                       OR TO OBTAIN INTEREST PAYABLE PRIOR
                              TO THE EXCHANGE DATE

                                   CERTIFICATE

     [Insert title or sufficient description of Securities to be delivered]

            This is to certify that, based solely on written certifications that
we have received in writing, by tested telex or by electronic transmission from
each of the persons appearing in our records as persons entitled to a portion of
the principal amount set forth below (our "Member Organizations") substantially
in the form attached hereto, as of the date hereof, [U.S.$] __________________
principal amount of the above-captioned Securities (i) is owned by person(s)
that are not citizens or residents of the United States, domestic partnerships,
domestic corporations or any estate or trust the income of which is subject to
United States Federal income taxation regardless of its source ("United States
person(s)"), (ii) is owned by United States person(s) that are (a) foreign
branches of United States financial institutions (financial institutions, as
defined in U.S. Treasury Regulations Section 1.165-12(c)(1)(v) are herein
referred to as "financial institutions") purchasing for their own account or for
resale, or (b) United States person(s) who acquired the Securities through
foreign branches of United States financial institutions and who hold the
Securities through such United States financial institutions on the date hereof
(and in either case (a) or (b), each such financial institution has agreed, on
its own behalf or through its agent, that we may advise John Deere Capital
Corporation or its agent that such financial institution will comply with the
requirements of Section 165(j)(3)(A), (B) or (C) of the Internal Revenue Code of
1986, as amended, and the regulations thereunder), or (iii) is owned by United
States or foreign financial institution(s) for purposes of resale during the
restricted period (as defined in United States Treasury Regulations Section
1.163-5(c)(2)(i)(D)(7)), and, to the further effect, that financial institutions
described in clause (iii) above (whether or not also described in clause (i) or
(ii)) have certified that they have not acquired the Securities for purposes of
resale directly or indirectly to a United States person or to a person within
the United States or its possessions.

            As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

            We further certify that (i) we are not making available herewith for
exchange (or, if relevant, collection of any interest) any portion of the
temporary global Security representing the above-captioned Securities excepted
in the above-referenced certificates of Member Organizations and (ii) as of the
date hereof we have not received any notification from any of our Member
Organizations to the effect that the statements made by such Member
Organizations

<PAGE>   107

with respect to any portion of the part submitted herewith for exchange (or, if
relevant, collection of any interest) are no longer true and cannot be relied
upon as of the date hereof.

            We understand that this certification is required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated: ____________

[To be dated no earlier than
the Exchange Date or the relevant
Interest Payment Date occurring
prior to the Exchange Date, as
applicable]

                                    [Morgan Guaranty Trust Company of New
                                    York, Brussels Office,] as Operator
                                    of the Euroclear System
                                    [Clearstream Banking societe anonyme]

                                    By ______________________________

                                      A-2-2

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