NORTH AMERICAN VACCINE INC
8-K, 1998-11-20
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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

                                    FORM 8-K


                                 CURRENT REPORT



                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


               Date of Report (Date of earliest event reported):
                               November 12, 1998



                              NORTH AMERICAN VACCINE, INC.
            ----------------------------------------------------------
            (Exact name of registrant as specified in its charter)


               CANADA                        1-10451            98-0121241
   -------------------------------       ------------    ----------------------
   (State or other jurisdiction of       (Commission        (IRS Employer
            incorporation)               File Number)    Identification No.)




      10150 OLD COLUMBIA ROAD, COLUMBIA, MARYLAND                 21046
      -------------------------------------------             ---------
       (Address of principal executive offices)               (Zip Code)



      Registrant's telephone number, including area code: (410) 309-7100






<PAGE>


Item 5. OTHER EVENTS

      On  November  12,  1998,  the Company  completed  a $25 million  financing
through the private placement of 4.5% Convertible  Secured Notes ("4.5% Notes").
The 4.5% Notes were sold at par,  mature on  November  13,  2003 and provide for
interest payable semi-annually on May 13 and November 13 of each year commencing
on May 13, 1999.  The 4.5% Notes are  convertible,  in whole or in part,  by the
holder(s)  at  any  time  prior  to  maturity  (unless  previously  redeemed  or
repurchased)  into shares of the Company's Common Stock at a conversion price of
approximately $8.54 per share. The conversion price was set based on the average
closing  price of the  Company's  Common  Stock for the twenty (20) trading days
preceding the date of the announcement of the agreement-in-principle between the
Company and prospective  purchasers.  The measurement period for determining the
conversion  price began on August 26, 1998 and terminated on September 23, 1998.
The closing prices of the Company's  Common Stock during that period ranged from
a low of $6.875  and a high of  $11.25.  The 4.5%  Notes are  secured by certain
assets of the Company,  are  otherwise  subordinated  in right of payment to all
existing and future  senior  indebtedness  of the  Company,  do not restrict the
incurrence  of  future  senior  or other  indebtedness  of the  Company  and are
redeemable,  in whole or in part,  at the option of the  Company on or after one
year from the date of issuance at par, plus accrued  interest to the  redemption
date. Upon a change in control, the Company is required to offer to purchase all
of the 4.5% Notes then  outstanding  at a  purchase  price  equal to 100% of the
principal amount thereof, plus interest. The repurchase price will be payable in
cash or, at the option of the Company,  in shares of the Company's  Common Stock
(valued at 95% of the average closing prices of the Common Stock for a specified
period prior to the repurchase date). At its option,  the Company may redeem the
4.5%  Notes,  in whole or in part,  on or after  November  13,  1999 at par plus
accrued interest.

      The net proceeds from the offering,  estimated at $24.6 million, are to be
used for marketing and distribution of first commercial  products,  research and
development,  clinical trials, capital expenditures  (including  construction or
acquisition of additional  facilities  and purchase of equipment)  protection of
patent rights, and general corporate purposes and working capital.

      The 4.5% Notes were issued to certain  existing  shareholders,  affiliates
and accredited investors, including BioChem Pharma Inc. and Phillip Frost, M.D.,
which purchased 4.5% Notes in the aggregate  principal  amount of $9 million and
$4.25  million,  respectively.  The 4.5%  Notes  are not  registered  under  the
Securities  Act of 1933, as amended (the  "Securities  Act"),  or any applicable
state or  foreign  securities  laws,  and were sold in  reliance  on  prescribed
exemptions  from  registrations  under the Securities  Act and other  applicable
state or foreign securities laws.

      On November  12, 1998,  the date on which the 4.5% Notes were issued,  the
closing price of the Company's Common Stock was $12.625.  As this price exceeded
the  conversion  price of the 4.5% Notes,  the  Company  must  recognize,  under
generally accepted  accounting  principles,  a beneficial  conversion feature by
allocating  approximately  $12.0 million of the  Offering's  proceeds to paid-in
capital in the fourth  quarter of 1998.  This  discount  also is deemed to be an
increase in the effective  interest rate of the 4.5% Notes and will be reflected
in the fourth  quarter of 1998 as a  corresponding  one-time  charge to interest
expense of approximately $12.0 million.

Item 7. FINANCIAL STATEMENTS AND EXHIBITS

(c) Exhibits:

10.38 Indenture, dated November 12, 1998, by and between the Company and Bankers
Trust Company, as Trustee.

10.39 Security and Pledge Agreement, dated November 12, 1998, by and between the
Company and Bankers Trust Company, as Trustee.


                                       2
<PAGE>



                                   SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

Date: November 20, 1998


                                    NORTH AMERICAN VACCINE, INC.


                                    By: /s/ Randal D. Chase, Ph.D
                                        ------------------------
                                        Randal D. Chase, Ph.D
                                        President and Chief Executive Officer


                                       3
<PAGE>



                                     EXHIBIT INDEX

   EXHIBIT
   NUMBER                           DESCRIPTION

    10.38   Indenture,  dated  November 12, 1998, by and between the Company and
            Bankers Trust Company, as Trustee.

    10.39   Security and Pledge  Agreement,  dated  November  12,  1998,  by and
            between the Company and Bankers Trust Company, as Trustee.










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







                          NORTH AMERICAN VACCINE, INC.


                                       and

                              BANKERS TRUST COMPANY
                                   as Trustee



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

                                    INDENTURE
                          Dated as of November 12, 1998
                             -------------------





                     4.5% Convertible Secured Notes due 2003

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


<PAGE>


                Certain Sections of this Indenture relating to
                       Sections 310 through 318 of the
                          Trust Indenture Act of 1939:
Section 310 (a)(1)   .................................      609
            (a)(2)   .................................      609
            (a)(3)   .................................      Not Applicable
            (a)(4)   .................................      Not Applicable
            (a)(5)   .................................      609
            (b)      .................................      608
Section 312 (a)      .................................      701
                     .................................      702(a)
            (b)      .................................      702(b)
            (c)      .................................      702(c)
Section 314 (a)      .................................      704
            (a)(4)   .................................      1004
            (b)      .................................      1502
            (c)(1)   .................................      102
            (c)(2)   .................................      102
            (c)(3)   .................................      Not Applicable
            (d)      .................................      1501
            (e)      .................................      102
Section 315 (a)      .................................      601
            (b)      .................................      602
            (c)      .................................      601
            (d)      .................................      601
            (e)      .................................      514
Section 316 (a)(1)(A).................................      502
                     .................................      512
            (a)(1)(B).................................      513
            (a)(2)   .................................      Not Applicable
            (b)      .................................      508
            (c)      .................................      104(c)
Section 317 (a)(1)   .................................      503
            (a)(2)   .................................      504
            (b)      .................................      1003
Section 318 (a)      .................................      107



<PAGE>


                               TABLE OF CONTENTS*
                                                                            PAGE

Parties........................................................................1
Recitals of the Company........................................................1

ARTICLE ONE  Definitions and Other Provisions of General Application.........1
   SECTION 101. Definitions..................................................1
   SECTION 102. Compliance Certificates and Opinions.........................7
   SECTION 103. Form of Documents Delivered to Trustee.......................8
   SECTION 104. Acts of Holders; Record Dates................................8
   SECTION 105. Notices, Etc., to Trustee and Company........................9
   SECTION 106. Notice to Holders; Waiver...................................10
   SECTION 107. Conflict with Trust Indenture Act...........................10
   SECTION 108. Effect of Headings and Table of Contents....................11
   SECTION 109. Successors and Assigns......................................11
   SECTION 110. Separability Clause.........................................11
   SECTION 111. Benefits of Indenture.......................................11
   SECTION 112. Governing Law...............................................11
   SECTION 113. Legal Holidays..............................................11
   SECTION 114. Intentionally Left Blank....................................12
   SECTION 115. Limitation on Individual Liability..........................12
   SECTION 116. Execution in Counterparts...................................12
   SECTION 117. Interest Act (Canada).......................................12

ARTICLE TWO.................................................................12
   SECTION 201. Forms Generally.............................................12
   SECTION 202. Form of Face of Security....................................13
   SECTION 203. Form of Reverse of Definitive Securities....................18

ARTICLE THREE  The Securities...............................................28
   SECTION 301. Title and Terms.............................................28
   SECTION 302. Denominations...............................................28
   SECTION 303. Execution, Authentication, Delivery and Dating..............29
   SECTION 304. Temporary Securities........................................29
   SECTION 305. Registration, Registration of Transfer and Exchange.........30
   SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities............32
   SECTION 307. Payment of Interest; Interest Rights Preserved..............33
   SECTION 308. Persons Deemed Owners.......................................34
   SECTION 309. Cancellation................................................34
   SECTION 310. Computation of Interest.....................................35

ARTICLE FOUR  Satisfaction and Discharge....................................35

- --------------------
*Note:  This table of contents  shall not, for any  purposes,  be deemed to be a
part of the Indenture.

                                        1
<PAGE>




   SECTION 401. Satisfaction and Discharge of Indenture.....................35
   SECTION 402. Application of Trust Money..................................36
   SECTION 403. Reinstatement...............................................36

ARTICLE FIVE  Remedies......................................................37
   SECTION 501. Events of Default...........................................37
   SECTION 502. Acceleration of Maturity; Rescission and Annulment..........38
   SECTION 503. Collection of Indebtedness and Suits for Enforcement by
         Trustee............................................................40
   SECTION 504. Trustee May File Proofs of Claim............................40
   SECTION 505. Trustee May Enforce Claims Without Possession of Securities.41
   SECTION 506. Application of Money Collected..............................41
   SECTION 507. Limitation on Suits.........................................42
   SECTION 508. Unconditional Right of Holders to Receive Principal,
         Premium, Additional Amounts and Interest and to Convert............42
   SECTION 509. Restoration of Rights and Remedies..........................43
   SECTION 510. Rights and Remedies Cumulative..............................43
   SECTION 511. Delay or Omission Not Waiver................................43
   SECTION 512. Control by Holders..........................................43
   SECTION 513. Waiver of Past Defaults.....................................44
   SECTION 514. Undertaking for Costs.......................................44

ARTICLE SIX  The Trustee....................................................45
   SECTION 601. Certain Duties and Responsibilities.........................45
   SECTION 602. Notice of Defaults..........................................45
   SECTION 603. Certain Rights of Trustee...................................46
   SECTION 604. Not Responsible for Recitals or Issuance of Securities......47
   SECTION 605. May Hold Securities.........................................47
   SECTION 606. Money Held in Trust.........................................48
   SECTION 607. Compensation and Reimbursement..............................48
   SECTION 608. Disqualification; Conflicting Interests.....................49
   SECTION 609. Corporate Trustee Required; Eligibility.....................49
   SECTION 610. Resignation and Removal; Appointment of Successor...........50
   SECTION 611. Acceptance of Appointment by Successor......................51
   SECTION 612. Merger, Conversion, Consolidation or Succession to Business.51
   SECTION 613. Preferential Collection of Claims Against Company...........51
   SECTION 614. Appointment of Authenticating Agent.........................51

ARTICLE SEVEN  Holders'Lists and Reports by Trustee and Company.............53
   SECTION 701. Company to Furnish Trustee Names and Addresses of Holders...53
   SECTION 702. Preservation of Information; Communication to Holders.......54
   SECTION 703. Reports by Trustee..........................................54
   SECTION 704. Reports by Company..........................................54
   SECTION 705. Intentionally Left Blank....................................54

ARTICLE EIGHT  Consolidation, Merger, Conveyance, Transfer or Lease.........55


                                       ii
<PAGE>




   SECTION 801. Company May Consolidate, Etc., Only on Certain Terms........55
   SECTION 802. Successor Substituted.......................................55

ARTICLE NINE  Supplemental Indentures.......................................56
   SECTION 901. Supplemental Indentures Without Consent of Holders..........56
   SECTION 902. Supplemental Indentures with Consent of Holders.............57
   SECTION 903. Execution of Supplemental Indentures........................58
   SECTION 904. Effect of Supplemental Indentures...........................58
   SECTION 905. Conformity with Trust Indenture Act.........................58
   SECTION 906. Reference in Securities to Supplemental Indentures..........58
   SECTION 907. Notice of Supplemental Indenture............................58

ARTICLE TEN  Covenants......................................................59
   SECTION 1001. Payment of Principal, Premium and Interest.................59
   SECTION 1002. Maintenance of Office or Agency............................59
   SECTION 1003. Money for Security Payments to Be Held in Trust............59
   SECTION 1004. Statement By Officers as to Default........................61
   SECTION 1005. Existence..................................................61
   SECTION 1006. Maintenance of Properties..................................61
   SECTION 1007. Payment of Taxes and Other Claims..........................61
   SECTION 1008. Resale of Certain Securities...............................62
   SECTION 1009. Waiver of Certain Covenants................................62
   SECTION 1010. Additional Amounts.........................................62

ARTICLE ELEVEN  Redemption of Securities....................................63
   SECTION 1101. Right of Redemption........................................63
   SECTION 1102. Applicability of Article...................................63
   SECTION 1103. Election to Redeem; Notice to Trustee......................63
   SECTION 1104. Selection by Trustee of Securities to be Redeemed..........63
   SECTION 1105. Notice of Redemption.......................................64
   SECTION 1106. Deposit of Redemption Price................................65
   SECTION 1107. Securities Payable on Redemption Date......................65
   SECTION 1108. Securities Redeemed in Part................................65

ARTICLE TWELVE  Subordination of Securities.................................66
   SECTION 1201. Securities Subordinated to Senior Indebtedness.............66
   SECTION 1202. Payment Over of Proceeds Upon Dissolution. Etc.............66
   SECTION 1203. Prior Payment to Senior Indebtedness upon Acceleration of
         Securities.........................................................67
   SECTION 1204. Intentionally Left Blank...................................68
   SECTION 1205. Payment Permitted If No Default............................68
   SECTION 1206. Subrogation to Rights of Holders of Senior Indebtedness....68
   SECTION 1207. Provisions Solely to Define Relative Rights................69
   SECTION 1208. Trustee to Effectuate Subordination........................69
   SECTION 1209. No Waiver of Subordination Provisions......................69
   SECTION 1210. Notice to Trustee..........................................70


                                       iii
<PAGE>




   SECTION 1211. Reliance on Judicial Order or Certificate of Liquidating
         Agent..............................................................70
   SECTION 1212. Trustee Not Fiduciary for Holders of Senior Indebtedness...71
   SECTION 1213. Rights of Trustee as Holder of Senior Indebtedness;
         Preservation of Trustee's Rights...................................71
   SECTION 1214. Article Applicable to Paying Agents........................71
   SECTION 1215. Certain Conversions Deemed Payment.........................71
   SECTION 1216. No Suspension of Remedies..................................72

ARTICLE THIRTEEN  Conversion of Securities..................................72
   SECTION 1301. Conversion Privilege and Conversion Price..................72
   SECTION 1302. Exercise of Conversion Privilege...........................73
   SECTION 1303. Fractions of Shares........................................74
   SECTION 1304. Adjustment of Conversion Price.............................74
   SECTION 1305. Notice of Adjustments of Conversion Price..................82
   SECTION 1306. Notice of Certain Corporate Action.........................82
   SECTION 1307. Company to Reserve Common Shares...........................83
   SECTION 1308. Taxes on Conversions.......................................84
   SECTION 1309. Covenant as to Common Shares...............................84
   SECTION 1310. Cancellation of Converted Securities.......................84
   SECTION 1311. Provisions of Consolidation, Merger or Sale of Assets......84
   SECTION 1312. Trustee's Disclaimer.......................................85

ARTICLE FOURTEEN  Right to Require Repurchase...............................86
   SECTION 1401. Right to Require Repurchase................................86
   SECTION 1402. Notice; Method of Exercising Repurchase Right..............86
   SECTION 1403. Deposit of Repurchase Price................................87
   SECTION 1404. Securities Not Repurchased on Repurchase Date..............88
   SECTION 1405. Securities Repurchased in Part.............................88
   SECTION 1406. Certain Definitions........................................88
   SECTION 1407. Merger, Consolidation, Etc.................................89

ARTICLE FIFTEEN  Security...................................................90
   SECTION 1501. Security and Pledge Agreement..............................90
   SECTION 1502. Recording, Etc.............................................90
   SECTION 1503. Intentionally Left Blank...................................91
   SECTION 1504. Certificates of the Company................................91
   SECTION 1505. Suits to Protect the Collateral............................91
   SECTION 1506. Authorization of Receipt of Funds by the Trustee Under the
         Security and Pledge Agreement......................................91



                                       iv
<PAGE>




      INDENTURE, dated as of November 12, 1998, between North American Vaccine,
Inc., a corporation duly organized and existing under the laws of Canada (herein
called the "Company"), having its principal executive offices at 10150 Old
Columbia Road, Columbia, Maryland 21046 and Bankers Trust Company, a New York
corporation, as Trustee (herein called the "Trustee").

                             RECITALS OF THE COMPANY

      The Company has duly authorized the creation of an issue of its 4.5%
Convertible Secured Notes due 2003 (herein called the "Securities") of
substantially the tenor and amount hereinafter set forth, and to provide
therefor the Company has duly authorized the execution and delivery of this
Indenture.

      All things necessary to make the Securities, when executed by the Company
and authenticated and delivered hereunder and duly issued by the Company, the
valid obligations of the Company, and to make this Indenture a valid agreement
of the Company, in accordance with their and 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 agreed, for the equal and
proportionate benefit of all Holders of the Securities, 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:

      (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 Trust Indenture
Act, either directly or by reference therein, have the meanings assigned to them
therein;

      (3) all accounting terms not otherwise defined herein have the meanings
assigned to them in accordance with generally accepted accounting principles,
and, except as otherwise herein expressly provided, the term "generally accepted
accounting principles" with respect to any computation required and permitted
hereunder shall mean such accounting principles as are generally accepted and
accepted and adopted by the Company at the date of this Indenture; and the words



<PAGE>




"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 in Articles Twelve, Thirteen and Fourteen are defined
in such Articles.

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

      "Additional Amounts" has the meaning specified in Section 202.

      "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 Person authorized by the Trustee pursuant
to Section 614 to act on behalf of the Trustee to authenticate Securities.

      "Bankruptcy Law" has the meaning specified in Section 501.

      "Beneficial Owner" is determined in accordance with Rule 13d-3,
promulgated by the Commission under the Exchange Act.

      "Board of Directors" means either the board of directors of the Company or
any duly authorized committee of that board.

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

      "Business Day" means each Monday, Tuesday, Wednesday, Thursday and Friday
which is not a day on which banking institutions in New York, New York or the
city in which the Corporate Trust Office is located are authorized or obligated
to close by law or executive order.

      "Canadian Additional Amounts" has the meaning specified in Section 202.

      "Canadian Excluded Holder" has the meaning specified in Section 202.

      "Canadian Tax" has the meaning specified in Section 202.

      "Change in Control" has the meaning specified in Section 1406.

      "Closing Date" means November 12, 1998.



                                       2
<PAGE>




      "Collateral" means the current or future assets of the Company defined as
Collateral in the Security and Pledge Agreement.

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

      "Common Shares" includes any stock of any class of the Company which has
no preference in respect of dividends or of amounts payable in the event of any
voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which is not subject to redemption by the Company. However, subject to the
provisions of Section 1311, shares issuable on conversion of Securities shall
include only shares of the class designated as Common Shares of the Company at
the date of this Indenture or shares of any class or classes resulting from any
reclassification or reclassifications thereof and which have no preference in
respect of dividends or of amounts payable in the event of any voluntary or
involuntary liquidation, dissolution or winding-up of the Company and which are
not subject to redemption by the Company; PROVIDED, that if at any time there
shall be more than one such resulting class, the shares of each such class then
so issuable shall be substantially in the proportion which the total number of
shares of such class resulting from all such reclassifications bears to the
total number of shares of all such classes resulting from all such
reclassifications.

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

      "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman of the Board, its Chief
Executive Officer, its President or a Vice President, and by its Treasurer, an
Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered to
the Trustee.

      "Corporate Trust Office" means the office of the Trustee at which at any
particular time its corporate trust business shall principally be administered,
which office is, at the date as of which this Indenture is dated, located at
Four Albany Street, New York, New York 10006 (Attention:
Corporation Trust and Agency Services).

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

      "Current Market Price" has the meaning specified in Section 1304.

      "Custodian" has the meaning specified in Section 501.

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



                                       3
<PAGE>




      "Definitive Security" or "Definitive Securities" means a Security or
Securities that are in the form of the Security set forth in Sections 202 and
203 hereof.

      "Event of Default" has the meaning specified in Section 501.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended,
together with the rules and regulations promulgated thereunder.

      "Excluded Holder" has the meaning specified in Section 202.

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

      "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, including, for
all purposes of this instrument and any such supplemental indenture, the
provisions of the Trust Indenture Act that are deemed to be a part of and govern
this instrument and any such supplemental indenture, respectively.

      "Lien" means any mortgage, charge, pledge, lien (statutory or otherwise),
privilege, security interest, hypothecation, assignment for security, claim, or
preference or priority or other encumbrance upon or with respect to any property
of any kind, real or personal, movable or immovable, now owned or hereafter
acquired. A Person will be deemed to own subject to a Lien any property that
such Person has acquired or holds subject to the interest of a vendor or lessor
under any conditional sale agreement, capital lease or other title retention
agreement.

      "Interest Payment Date" means the Stated Maturity of an installment of
interest on the Securities.

      "Maturity," when used with respect to any Security, means the date on
which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity thereof or by declaration of
acceleration, redemption or otherwise.

      "Officers' Certificate" means a certificate signed by the Chairman of the
Board, the Chief Executive Officer, the President or a Vice President, and by
the Treasurer, an Assistant Treasurer, the Secretary or an Assistant Secretary,
of the Company, and delivered to the Trustee. One of the officers signing an
Officers' Certificate given pursuant to Section 1004 shall be the principal
executive, financial or accounting officer of the Company.

      "Opinion of Counsel" means a written opinion of counsel who shall be
reasonably acceptable to the Trustee.

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

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



                                       4
<PAGE>




      (ii) Securities, or portions thereof, for the payment or redemption of
which moneys in the necessary amount have been theretofore deposited with the
Trustee or any Paying Agent (other than the Company) in trust or set aside and
segregated in trust by the Company (if the Company shall act as its own Paying
Agent) for the Holders of such Securities; provided, that if such Securities, or
portions thereof, 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;

      (iii) 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; and

      (iv) Securities which have been converted into Common Shares, pursuant to
Article Thirteen;

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, 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 relying upon any such request, demand, authorization, direction, notice,
consent or waiver, only Securities as to which the Trustee has actual knowledge
of such ownership 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.

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

      "Person" means any individual, Corporation, partnership, joint venture,
trust, unincorporated organization or government or any agency or political
subdivision thereof.

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

      "Record Date" means either a Regular Record Date or a Special Record Date,
as applicable.

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



                                       5
<PAGE>




      "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 on the
applicable Redemption Date.

      "Regular Record Date," for the interest payable on any Interest Payment
Date means April 30 or October 31 (whether or not a Business Day), as the case
may be, next preceding such Interest Payment Date.

      "Regulation S" means Regulation S under the Securities Act of 1933.

      "Repurchase Date" has the meaning specified in Section 1401.

      "Repurchase Event" has the meaning specified in Section 1406.

      "Repurchase Price" has the meaning specified in Section 1401.

      "Responsible Officer" means, when used with respect to the Trustee, any
officer within the Corporate Trust and Agency Services group (or any successor
group of the Trustee) including any vice president, assistant vice president,
assistant secretary, assistant treasurer or any other officer or assistant
officer of the Trustee customarily performing 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 at the Corporate Trust Office
because of his knowledge of and familiarity with the particular subject.

      "Security and Pledge Agreement" means the agreement between the Company
and the Trustee, dated the Closing Date, relating to the Collateral.

      "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder.

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

      "Senior Indebtedness" has the meaning specified in Section 1201.

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

      "Stated Maturity," when used with respect to any Security or any
installment of interest thereon, means the date specified in such Security as
the fixed date on which the principal of such Security or such installment of
interest is due and payable.

      "Subsidiary" means a corporation more than 50% of the outstanding voting
stock of which is owned, directly or indirectly, by the Company or by one or
more other Subsidiaries or by the Company and one or more other Subsidiaries.
For the purposes of this definition, "voting stock" means stock which ordinarily
has voting power for the election of directors, whether at all times or only so
long as no senior class of stock has such voting power by reason of any
contingency.



                                       6
<PAGE>




      "Substituted Properties" has the meaning specified in Section 203.

      "Tax Law Change" has the meaning specified in Section 202.

      "Taxes" has the meaning specified in Section 202.

      "Taxing Jurisdiction" has the meaning specified in Section 202.

      "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force at
the date as of which this instrument was executed; PROVIDED, HOWEVER, that in
the event the Trust Indenture Act of 1939 is amended after such date, "Trust
Indenture Act" means, to the extent required by any such amendment, the Trust
Indenture Act of 1939 as so amended.

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

      "U.S. Additional Amounts" has the meaning specified in Section 202.

      "U.S. Excluded Holder" has the meaning specified in Section 202.

      "U.S. Tax" has the meaning specified in Section 202.

      "United States Alien" has the meaning specified in Section 202.

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

SECTION 102.   COMPLIANCE CERTIFICATES AND OPINIONS.

      Upon any application or request by the Company to the Trustee to take any
action under any provision of this Indenture, the Company shall furnish to the
Trustee such certificates and opinions as may be required under the Trust
Indenture Act. Each such certificate or opinion shall be given in the form of an
Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirement set forth in
this Indenture.

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

      (1) a statement that each individual or firm signing such certificate or
opinion has read such covenant or condition 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;



                                       7
<PAGE>




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

      (4) a statement as to whether, in the opinion of each such individual or
such firm, such condition or covenant has been complied with.

SECTION 103.   FORM OF DOCUMENTS DELIVERED TO TRUSTEE.

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

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

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

SECTION 104.   ACTS OF HOLDERS; RECORD DATES.

      (a) Any request, demand, authorization, direction, notice, consent, waiver
or other action provided by this Indenture to be given or taken by Holders may
be embodied in and evidenced by one or more instruments of substantially similar
tenor signed by such Holders in person or by agents duly appointed in writing;
and, except as herein otherwise expressly provided, such action shall become
effective when such instrument or instruments are delivered to the Trustee and,
where it is hereby expressly required, to the Company. Such instrument or
instruments (and the action embodied therein and evidenced thereby) are herein
sometimes referred to as the "Act" of the Holders signing such instrument or
instruments. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose of this Indenture
and (subject to Section 601) conclusive in favor of the Trustee and the Company,
if made in the manner provided in this Section.



                                       8
<PAGE>




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

      (c) The Company may, in the circumstances permitted by the Trust Indenture
Act, fix any day as the record date for the purpose of determining the Holders
entitled to give or take any request, demand, authorization, direction, notice,
consent, waiver or other action, or to vote on any action, authorized or
permitted to be given or taken by Holders. If not set by the Company prior to
the first solicitation of a Holder made by any Person in respect of any such
action, or, in the case of any such vote, prior to such vote, the record date
for any such action or vote shall be the 30th day (or, if later, the date of the
most recent list of Holders required to be provided pursuant to Section 701)
prior to such first solicitation or vote, as the case may be. With regard to any
record date, only the Holders on such date (or their duly designated proxies)
shall be entitled to give or take, or vote on, the relevant action.
Notwithstanding the foregoing, the Company shall not set a record date for, and
the provisions of this paragraph shall not apply with respect to, any Act by the
Holders pursuant to Sections 501, 502 or 512.

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

      (e) Any 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 therefor or in exchange therefor or in lieu thereof in
respect of anything done, omitted or suffered to be done by the Trustee or the
Company in reliance thereon, whether or not notation of such action is made upon
such Security.

      (f) Without limiting the foregoing, a Holder entitled hereunder to give or
take any action hereunder with regard to any particular Security may do so with
regard to all or any part of the principal amount of such Security or by one or
more duly appointed agents each of which may do so pursuant to such appointment
with regard to all or any different part of such principal amount.

SECTION 105.   NOTICES, ETC., TO TRUSTEE AND COMPANY.

      Any Act of Holders or other documents 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 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 and Agency
Services, or telecopied to (212) 250-6961 (telephone confirmation (212)
250-6161) or at any other address previously furnished in writing to the Holders
and the Company by the Trustee; or



                                       9
<PAGE>




      (2) the Company by the Trustee or by any Holder shall be sufficient for
every purpose hereunder (unless otherwise herein expressly provided) if in
writing and sent by registered or certified mail, postage prepaid, to the
Company or telecopied to (410) 309-4077 (telephone confirmation (410) 309-7100),
addressed to it at the address of its principal executive offices specified in
the first paragraph of this instrument or at any other address previously
furnished in writing to the Trustee by the Company.

      All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; five Business
Days after being deposited in the mail, registered or certified with postage
prepaid, if mailed; when receipt acknowledged, if telecopied; and the next
Business Day after timely delivery to the courier, if sent by nationally
recognized overnight air courier guaranteeing next day delivery.

SECTION 106.   NOTICE TO HOLDERS; WAIVER.

      Where this Indenture provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly provided)
if made, given, mailed or otherwise furnished or filed in writing to each Holder
affected by such event, at his address as it appears in the Security Register,
not later than the latest date (if any), and not earlier than the earliest date
(if any), prescribed for the giving of such notice. 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. All
such notices and communications shall be deemed to have been duly given: at the
time delivered by hand, if personally delivered; five Business Days after being
deposited in the mail, registered or certified with postage prepaid, if mailed;
when answered back if telexed; when receipt acknowledged, if telecopied; and the
next Business Day after timely delivery to the courier, if sent by nationally
recognized overnight air courier guaranteeing next day delivery.

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

SECTION 107.   CONFLICT WITH TRUST INDENTURE ACT.

      It is the express intention of the Company that this Indenture be subject
to the provisions of the Trust Indenture Act of 1939, as amended,
notwithstanding the fact that the Securities are being offered in a private
placement and not a public offering; provided, however, that the Trust Indenture
Act Sections 310 (b), 311, and 313 shall not be applicable to or be incorporated
by reference in this Indenture. Except as otherwise expressly set forth herein,
all mandatory provisions of such Trust Indenture Act shall be deemed to apply to
this Indenture as if fully set forth herein and any provision herein
inconsistent with any such provision of such Trust Indenture Act shall be deemed
superseded thereby.



                                       10
<PAGE>




SECTION 108.   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 109.   SUCCESSORS AND ASSIGNS.

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

SECTION 110.   SEPARABILITY CLAUSE.

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

SECTION 111.   BENEFITS OF INDENTURE.

      Nothing in this Indenture or in the Securities, express or implied, shall
give to any Person, other than the parties hereto and their successors
hereunder, the Holders of Securities and, with respect to Article Twelve, the
holders of Senior Indebtedness, any benefit or any legal or equitable right,
remedy or claim under this Indenture.

SECTION 112.   GOVERNING LAW.

      This Indenture and, except as may otherwise be required by mandatory
provisions of law, the Securities shall be governed by and construed in
accordance with the laws of the State of New York, but without regard to the
principles of conflicts of laws thereof.

SECTION 113.   LEGAL HOLIDAYS.

      In any case where any Interest Payment Date, Redemption Date, Repurchase
Date or Stated Maturity of any Security or the last date on which a Holder has
the right to convert his Securities shall not be a Business Day, then
(notwithstanding any other provision of this Indenture or of the Securities)
payment of interest or principal and premium if any, or conversion of the
Securities need not be made on such date, but may be made on the next succeeding
Business Day with the same force and effect as if made on the Interest Payment
Date, Repurchase Date, Redemption Date or at the Stated Maturity, or on such
last day for conversion; PROVIDED, that no interest shall accrue for the period
from and after such Interest Payment Date, Repurchase Date, Redemption Date,
Stated Maturity or such last day of conversion, as the case may be, to the next
succeeding Business Day.



                                       11
<PAGE>




SECTION 114.   INTENTIONALLY LEFT BLANK.

SECTION 115.   LIMITATION ON INDIVIDUAL LIABILITY.

      No recourse under or upon any obligation, covenant or agreement contained
in this Indenture or in any Security, or for any claim based thereon or
otherwise in respect thereof, shall be had against any incorporator,
shareholder, officer or director, as such, past, present or future, of the
Company or any successor corporation, either directly or through the Company,
whether by virtue of any constitution, statute or rule of law, or by the
enforcement of any assessment or penalty or otherwise; it being expressly
understood that this Indenture and the obligations issued hereunder are solely
corporate obligations, and that no such personal liability whatever shall attach
to, or is or shall be incurred by, the incorporators, shareholders, officers or
directors, as such, of the Company or any successor Person, or any of them,
because of the creation of the indebtedness hereby authorized, or under or by
reason of the obligations, covenants or agreements contained in this Indenture
or in any Security or implied therefrom; and that any and all such personal
liability of every name and nature, either at common law or by constitution or
statute, of, and any and all such rights and claims against, every such
incorporator, shareholder, officer or director, as such, because of the creation
of the indebtedness hereby authorized, or under or by reason of the obligations,
covenants or agreements contained in this Indenture or in any Security or
implied therefrom, are hereby expressly waived and released as a condition of,
and as a consideration for, the execution of this Indenture and the issuance of
such Security.

SECTION 116.   EXECUTION IN COUNTERPARTS.

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

SECTION 117.   INTENTIONALLY LEFT BLANK


                                   ARTICLE TWO

                                 SECURITY FORMS

SECTION 201.   FORMS GENERALLY.

      The Securities and the Trustee's certificate of authentication shall be in
substantially the forms set forth in this Article, with such appropriate
insertions, omissions, substitutions and other variations as are required or
permitted by this Indenture, and may have such letters, numbers or other marks
of identification and such legends or endorsements placed thereon as may be
required to comply with any organizational document, any applicable law or with
the rules of any securities exchange on which the Securities are listed or as
may, consistently herewith, be determined by the Company's officers executing
such Securities, as evidenced by their execution of the Securities.

      The Securities will be issued in definitive form and shall be
substantially in the form set forth in Sections 202 and 203 hereof.



                                       12
<PAGE>




      The Definitive Securities shall be printed, lithographed or engraved or
produced by any combination of these methods or may be produced in any other
manner as determined by the officers executing such Securities, as evidenced by
their execution of such Securities.

SECTION 202.   FORM OF FACE OF SECURITY.

      THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION
EXEMPT FROM REGISTRATION AND PROSPECTUS REQUIREMENTS UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), THE ONTARIO SECURITIES ACT AND THE
QUEBEC SECURITIES ACT, AND ANY COMMON SHARES ISSUABLE UPON CONVERSION OF THIS
SECURITY MAY NOT BE SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH
REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.

      THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF NORTH AMERICAN
VACCINE, INC. THAT (A) THIS SECURITY AND ANY COMMON SHARES ISSUABLE UPON ITS
CONVERSION OF THIS SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED ONLY
(1) IN A TRANSACTION EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES
ACT, OR (2) PURSUANT TO THE EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT
PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE), OR (3) PURSUANT TO A
REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES
ACT (AND WHICH CONTINUES TO BE EFFECTIVE AT THE TIME OF SUCH TRANSFER) AND IN
EACH OF ITEMS (1) THROUGH (3) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF THE STATES AND OTHER JURISDICTIONS OF THE UNITED STATES, AND THAT (B) THE
HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF
THIS SECURITY, OR ANY COMMON SHARES ISSUABLE UPON CONVERSION OF THIS SECURITY
FROM IT, OTHER THAN UPON TRANSFER PURSUANT TO ITEM (2) OR (3) OF CLAUSE (A) AS A
CONSEQUENCE OF WHICH THIS LEGEND IS REMOVED OR REMOVABLE, OF THE RESALE
RESTRICTIONS REFERRED TO IN CLAUSE (A) ABOVE.

      THIS SECURITY, ANY COMMON SHARES ISSUABLE UPON CONVERSION OF THIS SECURITY
AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME
TO MODIFY THE RESTRICTIONS ON AND PROCEDURES FOR RESALES AND OTHER TRANSFERS OF
ANY SUCH SECURITIES TO REFLECT ANY CHANGE IN APPLICABLE LAW OR REGULATION (OR
THE INTERPRETATION THEREOF) OR IN PRACTICES RELATING TO THE RESALE OR TRANSFER
OF RESTRICTED SECURITIES GENERALLY. THE HOLDER OF THIS SECURITY AND ANY COMMON
SHARES ISSUABLE UPON CONVERSION OF THIS SECURITY SHALL BE DEEMED BY THE
ACCEPTANCE OF THIS SECURITY IN THIS OFFERING, AND ANY COMMON SHARES ISSUABLE
UPON CONVERSION OF THIS SECURITY, TO HAVE AGREED TO ANY SUCH AMENDMENT OR
SUPPLEMENT.

                          NORTH AMERICAN VACCINE, INC.

                     4.5% Convertible Secured Notes due 2003

No. __________                                                    $_________



                                       13
<PAGE>




      North American Vaccine, Inc., a corporation duly organized and existing
under the laws of Canada (herein called the "Company," which term includes any
successor Person under the Indenture hereinafter referred to), for value
received, hereby promises to pay to ____________________________, or its
registered assigns, the principal sum of _____________________Dollars on
November 13, 2003 upon surrender hereof to the Paying Agent, and to pay interest
thereon from the date of original issuance of Securities pursuant to the
Indenture or from and including the most recent Interest Payment Date to which
interest has been paid or duly provided for, semi-annually on May 13 and
November 13 in each year, commencing May 13, 1999 at the rate of 4.5% per annum,
until the principal hereof is paid or made available for payment. The interest
so payable, and punctually paid or duly provided for, on any Interest Payment
Date will, as provided in such Indenture, be paid to the Person in whose name
this Security (or one or more Predecessor Securities) is registered at the close
of business on the Regular Record Date for such interest, which shall be the
April 30 or October 31 (whether or not a Business Day), as the case may be, next
preceding such Interest Payment Date. Any such interest not so punctually paid
or duly provided for will forthwith cease to be payable to the Holder on such
Regular Record Date and may either be paid to the Person in whose name this
Security (or one or more Predecessor Securities) is registered at the close of
business on a Special Record Date for the payment of such Defaulted Interest to
be fixed by the Trustee or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the
Securities may be listed and upon such notice as may be required by such
exchange, all as more fully provided in said Indenture. Notice of a Special
Record Date shall be given to Holders of Securities not less than 10 days prior
to such Special Record Date. Payment of the principal of and premium, if any,
and interest on this Security will be made in same day funds at the office or
agency of the Company maintained for that purpose pursuant to Section 1002 of
the Indenture, in each case in such coin or currency of the United States of
America as of the time of payment is legal tender for payment of public and
private debts; provided, however, that at the option of the Company payment of
interest in respect of Securities may be made by check mailed to the address of
the Person entitled thereto as such address shall appear in the Security
Register or by transfer to a dollar account maintained by the Holder with a bank
in New York, New York.

      The Company will pay to the Holder of this Security who is a non-resident
of Canada (within the meaning of the Income Tax Act (Canada)) such additional
amounts ("Canadian Additional Amounts") as may be necessary in order that every
net payment of the principal of and premium, if any, and interest on this
Security (including payment on redemption or repurchase), after deduction or
withholding for or on account of any present or future tax, assessment or
governmental charge required by law to be deducted or withheld from a payment of
principal, premium or interest on this Security and imposed upon or as a result
of such payment by the Government of Canada or of any province or territory
thereof or by any authority or agency thereof or therein ("Taxing Jurisdiction")
("Canadian Tax"), will not be less than the amount provided for in this Security
to be then due and payable; provided that no Canadian Additional Amounts will be
payable with respect to a payment or credit made to a Holder of, or on behalf of
an owner of a beneficial interest in, this Security (i) with whom the Company
does not deal at arm's length (within the meaning of the Income Tax Act
(Canada)) at the time of making such payment or credit, or (ii) which is subject


                                       14
<PAGE>




to Canadian Taxes by reason of its being connected with Canada or any province
or territory thereof (including, without limitation, by reason of such person
being, or being deemed to be, a resident of Canada (within the meaning of the
Income Tax Act (Canada)) or carrying on business or being deemed to carry on
business (within the meaning of such Act) in Canada whether in or through a
permanent establishment or fixed base in Canada or otherwise) otherwise than by
the mere holding of this Security or the receipt of payments or credits
thereunder or (iii) that could obtain an exemption from, or reduction in, the
applicable Canadian Tax by satisfying reporting or certification requirements
imposed by the relevant Taxing Jurisdiction and that fails to do so (such a
Holder or owner being referred to herein collectively as a "Canadian Excluded
Holder").

      The Company will also pay to the Holder of this Security who is a United
States Alien (as defined below) such additional amounts ("U.S. Additional
Amounts," and, together with Canadian Additional Amounts, "Additional Amounts")
as may be necessary in order that every net payment of the principal of and
premium, if any, and interest on this Security (including payment on redemption
or repurchase), after deduction or withholding for or on account of any present
or future tax, assessment or governmental charge imposed upon or as a result of
such payment by the United States or any political subdivision or taxing
authority thereof or therein ("U.S. Tax," and, together with Canadian Tax,
"Taxes"), will not be less than the amount provided for in this Security to be
then due and payable; provided that no U.S. Additional Amounts will be payable
to such a Holder with respect to:

      (a) any U.S. Tax that would not have been so imposed but for (i) the
existence of any present or former connection between such Holder (or between a
fiduciary, settlor, beneficiary, member, shareholder of or possessor of a power
over such a Holder that is an estate, a trust, a partnership or a corporation)
and the United States or any political subdivision or taxing authority thereof
or therein, including, without limitation, such Holder (or such fiduciary,
settlor, beneficiary, member, shareholder or possessor) being or having been a
citizen or resident of the United States or treated as a resident thereof, or
being or having been engaged in a trade or business or present therein, or
having or having had a permanent establishment therein, or (ii) such Holder's
present or former status as a personal holding company, a foreign personal
holding company with respect to the United States, or a foreign private
foundation or foreign tax-exempt entity for U.S. tax purposes, or a corporation
that accumulates earnings to avoid U.S. federal income tax;

      (b) any U.S. Tax that would not have been so imposed but for the
presentation by such Holder of this Security for payment on a date more than 15
days after the date on which such payment became due and payable or the date on
which payment thereof is duly provided for, whichever occurs later;

      (c) any U.S. Tax that is an estate, inheritance, gift, sales, transfer,
personal property or similar tax, assessment or governmental charge;

      (d) any U.S.  Tax that would not have been  imposed but for the failure to
comply with any  certification,  identification or other reporting  requirements
concerning the  nationality,  residence,  identity or connection with the United


                                       15
<PAGE>




States of such Holder (or owner of a beneficial  interest in this Security),  if
compliance  is required by statute or by  regulation  of the United  States as a
precondition to relief or exemption from such U.S. Tax;

      (e) any U.S. Tax that is payable otherwise than by deduction or
withholding from payments of principal or premium, if any, or interest on this
Security;

      (f) any U.S. Tax imposed on a Holder that actually or constructively owns
10% or more of the total combined voting power of all classes of stock of the
Company entitled to vote or that is a controlled foreign corporation related to
the Company through stock ownership;

      (g) any U.S. Tax imposed on a Holder that is a partnership or a fiduciary
or other than the sole beneficial owner of such payment, but only to the extent
that any beneficial owner or member of the partnership or beneficiary or settlor
with respect to the fiduciary would not have been entitled to the payment of
U.S. Additional Amounts had the beneficial owner, member, beneficiary or settlor
directly been the Holder of this Security; or

      (h) any combination of items (a), (b), (c), (d), (e), (f) and (g).

      (The Holder of this Security with respect to which any of the listed U.S.
Taxes becomes payable is referred to herein as a "U.S. Excluded Holder," and
U.S. Excluded Holders, together with Canadian Excluded Holders, are referred to
herein as "Excluded Holders." For purposes of this Security, a "United States
Alien" is any person who, for U.S. federal income tax purposes, is a foreign
corporation, a nonresident alien individual, a nonresident alien fiduciary of a
foreign estate or trust, or a foreign partnership one or more of the members of
which is, for U.S. federal income tax purposes, a foreign corporation, a
nonresident alien individual or a nonresident alien fiduciary of a foreign
estate or trust.)

      The Company will make any deduction or withholding, and remit the full
amount deducted or withheld to the relevant authority, in accordance with
applicable law. The Company will furnish the Holder of this Security, within 30
days after the date the payment of any Taxes is due pursuant to applicable law,
certified copies of tax receipts evidencing such payment by the Company. The
Company will indemnify and hold harmless the Holder of, or each owner of a
beneficial interest in, this Security (other than an Excluded Holder) and upon
written request will reimburse the Holder, or such owner of a beneficial
interest, for the amount of (i) any Taxes levied or imposed on and paid by the
Holder, or such owner of a beneficial interest, as a result of payments made
with respect to this Security, (ii) any liability (including penalties, interest
and reasonable expenses) arising from or with respect to Taxes, and (iii) any
Taxes imposed with respect to payment of Additional Amounts or any reimbursement
pursuant to this sentence.

      Notwithstanding the foregoing, the Company shall not be obligated to pay
Additional Amounts in respect of payments becoming due on this Security more
than 15 days after the redemption date for a redemption described on the reverse
hereof except to the extent that the Company's obligations to pay such
Additional Amounts does not arise from the Tax Law Change that resulted in such
redemption.



                                       16
<PAGE>




      At least 30 days prior to each date on which any payment under or with
respect to this Security is due and payable, if the Company will be obligated to
pay Additional Amounts with respect to such payment, the Company will deliver to
the Trustee and the Paying Agent an Officers' Certificate stating the fact that
such Additional Amounts will be payable and setting forth the amounts so payable
and other information necessary to enable the Trustee and the Paying Agent to
pay such Additional Amounts to the Holder or owners of a beneficial interest in
this Security, as the case may be, on the payment date.

      Except as specifically provided herein and in the Indenture, the Company
shall not be required to make any payment with respect to any Taxes. Whenever in
this Security there is a reference, in any context, to the payment of the
principal of or premium, if any, or interest on, or in respect of, this
Security, such mention shall be deemed to include mention of the payment of
Additional Amounts to the extent that, in such context, Additional Amounts are,
were or would be payable in respect of this Security. Express mention of the
payment of Additional Amounts (if applicable) in any provision of this Security
shall not be construed as excluding Additional Amounts in those provisions of
this Security where such express mention is not made.

      Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

      Unless the certificate of authentication hereon has been executed by the
Trustee referred to on the reverse hereof by manual signature, this Security
shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

      IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated: _____________________

[Corporate Seal]                          NORTH AMERICAN VACCINE, INC.


                                          By:_________________________________
                                             Daniel J. Abdun-Nabi, Senior Vice
                                                  President-Legal Affairs

                                          By:_________________________________
                                             Lawrence J. Hineline, Vice
                                                  President-Finance

Attest:


By:____________________________________
   Name:
   Title:



                                       17
<PAGE>




SECTION 203.   FORM OF REVERSE OF DEFINITIVE SECURITIES.

      This Security is one of a duly authorized issue of Securities of the
Company designated as its 4.5% Convertible Secured Notes due 2003 (herein called
the "Securities"), limited in aggregate principal amount to $25,000,000, issued
and to be issued under an Indenture, dated as of November 12, 1998 (herein
called the "Indenture"), between the Company and Bankers Trust Company as
Trustee (herein called the "Trustee," which term includes any successor trustee
under the Indenture), to which Indenture and all indentures supplemental thereto
reference is hereby made for a statement of the respective rights, limitations
of rights, duties and immunities thereunder of the Company, the Trustee, the
holders of Senior Indebtedness and the Holders of the Securities and of the
terms upon which the Securities are, and are to be, authenticated and delivered.

      Subject to and upon compliance with the provisions of the Indenture, the
Holder of this Security is entitled, at his option, at any time following the
date of original issuance of Securities pursuant to the Indenture and on or
before the close of business on November 13, 2003, or in case this Security or a
portion hereof is called for redemption, then in respect of this Security or
such portion hereof until and including, but (unless the Company defaults in
making the payment due upon redemption) not after, the close of business on the
Business Day next preceding the Redemption Date, to convert this Security (or
any portion of the principal amount hereof which is $1,000 or an integral
multiple thereof), at the principal amount hereof, or of such portion, into
fully paid and non-assessable Common Shares (calculated as to each conversion to
the nearest 1/100th of a share) at a conversion price equal to $8.5406 principal
amount for each Common Share (or at the current adjusted conversion price if an
adjustment has been made as provided in the Indenture) by surrender of this
Security, duly endorsed or assigned to the Company or in blank, to the Company
at its office or agency maintained for that purpose pursuant to Section 1002 of
the Indenture, accompanied by written notice to the Company in the form provided
in this Security (or such other notice as is acceptable to the Company) that the
Holder hereof elects to convert this Security, or if less than the entire
principal amount hereof is to be converted, the portion hereof to be converted,
and, in case such surrender shall be made during the period from the close of
business on any Regular Record Date next preceding any Interest Payment Date to
the close of business on the Business Day immediately preceding such Interest
Payment Date (unless this Security or the portion thereof being converted has
been called for redemption during the period from the close of business on any
Regular Record Date next preceding any Interest Payment Date to the close of
business on the Business Day next preceding the following Interest Payment
Date), also accompanied by payment in funds acceptable to the Company of an
amount equal to the interest payable on such Interest Payment Date on the
principal amount of this Security then being converted. If such Security or
portion thereof being converted shall have been called for redemption during the
period from the close of business on the Regular Record Date to the close of
business on the Business Day next preceding the following Interest Payment Date,
then the Company shall pay interest on such Security or portion thereof up to
but not including the date of conversion. Subject to the aforesaid requirements,
no payment or adjustment is to be made upon conversion on account of any
interest accrued hereon or on account of any dividends on the Common Shares
issued upon conversion. No fractional shares or scrip representing fractions of


                                       18
<PAGE>




shares will be issued on conversion, but, instead of any fractional share the
Company shall pay a cash adjustment as provided in the Indenture. The conversion
price is subject to adjustment as provided in the Indenture.

      In addition, the Indenture provides that in case of certain amalgamations,
consolidations, mergers, sales or transfers to which the Company is a party, the
Indenture shall be amended, without the consent of any Holders of Securities, so
that this Security, if then Outstanding, will be convertible thereafter, during
the period this Security shall be convertible as specified above, only into the
kind and amount of securities, cash and other property receivable upon such
amalgamation, consolidation, merger, sale or transfer by a holder of the number
of Common Shares of the Company into which this Security could have been
converted immediately prior to such amalgamation, consolidation, merger, sale or
transfer, but subject to all requirements necessary to ensure that the
Securities will not be subject to Canadian Tax as a result thereof, and assuming
such holder of Common Shares is not a Person with which the Company amalgamated
or consolidated or into which the Company merged or which merged into the
Company or to which such sale or transfer was made, as the case may be, or an
Affiliate thereof and, failed to exercise any rights of election as to the kind
or amount of securities, cash or other property receivable upon such
amalgamation, consolidation, merger, sale or transfer and further assuming, if
such amalgamation, consolidation, merger, sale or transfer occurs prior to the
later of 60 days following the date of original issuance of the Securities, that
the Security was convertible at the time of such occurrence at the conversion
price specified above as adjusted from the date of original issuance of such
Security to such time as provided in the Indenture, subject to any requirements
necessary to ensure that this Security will be and will remain exempt from
Canadian Tax including, without limitation, the requirement in effect on the
date hereof that the Holder of this Security shall not under any circumstances
be entitled to receive shares, other securities or property, other than
securities that are "prescribed securities" as defined in Section 6208 of the
Regulations under the Income Tax Act (Canada), in the event that any such
amalgamation, consolidation, merger, sale or transfer occurs on or prior to the
day that is five years plus one day from the date of original issuance of the
Securities. Notwithstanding any provision to the contrary if such amalgamation,
consolidation, merger, or transfer occurs on or prior to the day that is 5 years
plus one day from the date of original issuance of this Security, a holder of
this Security shall not be entitled in any circumstances to convert such
Security into any securities, cash or other property (the "Substituted
Properties") unless such Substituted Properties are "prescribed securities" with
respect to the Security for purposes of clause 212(1)(b)(vii)(E) of the Income
Tax Act (Canada).

      The Securities are subject to redemption upon not less than 30 and not
more than 60 days' notice by mail, at any time on or after November 13, 1999, as
a whole or in part, at the election of the Company, at the Redemption Price set
forth below (expressed as a percentage of the principal amount), plus accrued
interest to the Redemption Date (subject to the right of Holders of record on
the relevant Regular Record Date to receive interest due on an Interest Payment
Date that is on or prior to the Redemption Date).

             REDEMPTION PRICE
                 100.00%




                                       19
<PAGE>




in each case together with accrued and unpaid interest, if any, to, but
excluding, the Redemption Date.

      Securities are also redeemable, at the option of the Company, in whole but
not in part, under the circumstances described in the next succeeding paragraph,
at a Redemption Price equal to 100% of the principal amount thereof plus
interest accrued to the Redemption Date and any Additional Amounts; PROVIDED,
HOWEVER, that interest installments on Securities whose Stated Maturity is on or
prior to such Redemption Date will be payable to the Holders of such Securities,
or one or more Predecessor Securities, of record at the close of business on the
relevant Record Dates referred to on the face hereof, all as provided in the
Indenture.

      If the Company has or will become obligated to pay to the Holder of this
Security Additional Amounts, as described on the face of this Security, as a
result of any change in, or amendment to, or proposed amendment to, the laws
(including any regulations and rulings promulgated thereunder) of the United
States or Canada, or any political subdivision or taxing authority thereof or
therein affecting taxation, or any change in, or amendment to, or proposed
amendment to the application or official interpretation of such laws,
regulations or rulings (any such change or amendment being herein referred to as
a "Tax Law Change"), and such obligation cannot be avoided by the Company taking
reasonable measures available to it, then the Company may, at its option, redeem
this Security as a whole but not in part, upon not less than 30 days nor more
than 60 days notice to the Holder prior to the Redemption Date, at a Redemption
Price equal to 100% of the principal amount plus interest accrued to the
Redemption Date and any Additional Amounts then payable; provided, that (i) no
such notice of redemption shall be given earlier than 90 days prior to the
earliest date on which the Company would be obligated to pay any such Additional
Amounts were a payment in respect of this Security then due and (ii) at the time
such notice of redemption is given, such obligation to pay such Additional
Amounts remains in effect. Prior to the mailing of any notice of redemption
pursuant to this paragraph, the Company shall deliver to the Trustee (a) an
Officers' Certificate stating that the Company is entitled to effect such
redemption and setting forth a statement of facts showing that the conditions
precedent to the right of the Company so to redeem have occurred and (b) an
Opinion of Counsel, to the effect that the Company has or will become obligated
to pay such Additional Amounts as a result of a Tax Law Change. The Company's
right to so redeem this Security shall continue as long as the Company shall
have made payments of Additional Amounts specified on the face of this Security.

      If a Change in Control occurs, the Holder of this Security shall have the
right, in accordance with the provisions of the Indenture, to require the
Company to repurchase this Security (or any portion of the principal amount
hereof that is an integral multiple of $1,000) for cash at a Repurchase Price
equal to 100% of the principal amount thereof plus interest accrued to the
Repurchase Date. At the option of the Company, the Repurchase Price may be paid
in cash or, as provided in the Indenture, by delivery of Common Shares having a
fair market value equal to the Repurchase Price; PROVIDED that payment may not
be made in Common Shares unless at the time of payment such Shares are listed on
a national securities exchange or quoted on Nasdaq. For purposes of this
paragraph, the fair market value of Common Shares shall be determined by the
Company and shall be equal to 95% of the average of the Closing Prices Per Share


                                       20
<PAGE>




for the five consecutive Trading Days immediately preceding the second Trading
Day immediately preceding the Repurchase Date. Whenever in this Security there
is a reference, in any context, to the principal of any Security as of any time,
such reference shall be deemed to include reference to the Repurchase Price
payable in respect of such Security and express mention of such Repurchase Price
in any provision of this Security shall not be construed as excluding the
Repurchase Price in those provisions of this Security when such express mention
is not made.

      In the event of redemption or conversion of this Security in part only, a
new Security or Securities for the unredeemed or unconverted portion hereof will
be issued in the name of the Holder hereof upon the cancellation hereof.

      The indebtedness evidenced by this Security is, in all respects,
subordinate and subject in right of payment to the prior payment in full of all
Senior Indebtedness, except with respect to the Collateral as provided in the
Security and Pledge Agreement, and this Security is issued subject to the
provisions of the Indenture with respect thereto. Each Holder of this Security,
by accepting the same, (a) agrees to and shall be bound by such provisions, (b)
authorizes and directs the Trustee on his behalf to take such action as may be
necessary or appropriate to effectuate the subordination so provided, and (c)
appoints the Trustee his attorney-in-fact for any and all such purposes.

      If an Event of Default shall occur and be continuing, the principal of all
the Securities may be declared due and payable in the manner and with the effect
provided in the Indenture.

      The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with the consent of the Holders of not
less than a majority in aggregate principal amount of the Securities at the time
Outstanding, and, under certain limited circumstances, by the Company and the
Trustee without the consent of the Holders. The Indenture also contains
provisions permitting the Holders of specified percentages in aggregate
principal amount of the Securities at the time Outstanding, on behalf of the
Holders of all the Securities, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and
their consequences. Any such consent or waiver by the Holder of this Security
shall be conclusive and binding upon such Holder and upon all future Holders of
this Security and of any Security issued upon the registration of transfer
hereof or in exchange hereof or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security.

      No reference herein to the Indenture and no provision of this Security or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and premium, if any, and
interest on this Security at the times, place and rate, and in the coin or
currency, herein prescribed or to convert this Security as provided in the
Indenture.

      As provided in the Indenture and subject to certain limitations therein
set forth, the transfer of this Security is registrable in the Security
Register, upon surrender of this Security for registration of transfer at the
office or agency of the Company in any place where the principal of and any


                                       21
<PAGE>




premium and interest on this Security are payable, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Securities,
of authorized denominations and for the same aggregate principal amount, will be
issued to the designated transferee or transferees.

      The Securities are issuable only in fully registered form without coupons
in denominations of $1,000 and any integral multiple thereof. As provided in the
Indenture and subject to certain limitations therein set forth, Securities are
exchangeable for a like aggregate principal amount of Securities of a different
authorized denomination, as requested by the Holder surrendering the same.

      No service charge shall be made for any such registration of transfer or
exchange except as provided in the Indenture, and the Company may require
payment of a sum sufficient to cover any tax or other governmental charge
payable in connection therewith.

      Prior to due presentment of this Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes, except as provided in this Security, whether or not this Security be
overdue, and neither the Company, the Trustee nor any such agent shall be
affected by notice to the contrary.

      All terms used in this Security which are defined in the Indenture shall
have the meanings assigned to them in the Indenture. The Company will furnish to
any Holder upon written request and without charge a copy of the Indenture.









                                       22
<PAGE>




                           [FORM OF CONVERSION NOTICE]


      TO NORTH AMERICAN VACCINE, INC.

      The undersigned registered owner of this Security hereby irrevocably
exercises the option to convert this Security, or the portion hereof (which is
$1,000 or a multiple thereof) designated below, into Common Shares in accordance
with the terms of the Indenture referred to in this Security, and directs that
the shares issuable and deliverable upon the conversion, together with any check
in payment for a fractional share and any Security representing any unconverted
principal amount hereof, be issued and delivered to the registered owner hereof
unless a different name has been provided below. If this Notice is being
delivered on a date after the close of business on a Regular Record Date and
prior to the close of business on the related Interest Payment Date, this Notice
is accompanied by payment in funds acceptable to the Company, of an amount equal
to the interest payable on such Interest Payment Date on the principal of this
Security to be converted (unless this Security has been called for redemption,
in which event the amount payable to accompany this Notice shall be determined
in accordance with the Indenture). If shares or any portion of this Security not
converted are to be issued in the name of a person other than the undersigned,
the undersigned will pay all transfer taxes payable with respect thereto. Any
amount required to be paid by the undersigned on account of interest accompanies
this Security.


                                        ______________________________________

Dated: _____________________________    ______________________________________
                                        Signature(s)

Signature(s) must be guaranteed by an eligible guarantor institution (banks,
stockbrokers, savings and loan associations and credit unions with membership in
an approved signature guarantee medallion program) pursuant to SEC Rule 17Ad -
15, if Common Shares are to be delivered, or Securities to be issued, other than
to and in the name of the registered owner.


____________________________________
Signature Guarantee


      Fill in for registration of Common Shares if they are to be delivered, or
Securities if they are to be issued, other than to and in the name of the
registered owner:


____________________________________
(Name)


____________________________________
(Street Address)




                                       23
<PAGE>




____________________________________
(City, State and zip code)



(Please print name and address)

Register:          ________   Common Shares
                   ________   Securities


(Check appropriate line(s)).

Principal amount to be converted (if less than all):  $_____________,000



                                    _________________________________
                                    Social Security or other Taxpayer
                                    Identification Number of owner





                                       24
<PAGE>





                                [ASSIGNMENT FORM]

      For value received ____________________________________hereby sell(s),
assign(s) and transfer(s) unto _____________________________________ (Please
insert social security or other Taxpayer Identification Number of assignee
______________) the within Security, and hereby irrevocably constitutes and
appoints __________________________ attorney to transfer the said security on
the books of the Company, with full power of substitution in the premises.

      In connection with any transfer of the within Security within two years of
the date of original issuance of such Security (unless such Security has been
sold pursuant to a registration statement that was effective at the time of such
transfer), the undersigned confirms that such Security is being transferred:

      / /   To North American Vaccine, Inc., or a subsidiary thereof; or

      / /   In an exempt transaction pursuant to and in compliance with the
            Securities Act; or

      / /   Pursuant to and in compliance with Rule 144 under the Securities
            Act;

and unless the box below is checked, the undersigned confirms that such Security
is not being transferred to an "affiliate" of the Company as defined in Rule 144
under the Securities Act of 1933, as amended (an "Affiliate").

      / /   The transferee is an Affiliate of the Company.

Dated: ________________________     _________________________________________
                                    Signature(s)

                                    Signature(s) must be guaranteed by an
                                    eligible guarantor institution (banks,
                                    stockbrokers, savings and loan associations
                                    and credit unions with membership in an
                                    approved signature guarantee medallion
                                    program) pursuant to SEC Rule 17Ad-15 if
                                    Common Shares are to be issued, or
                                    Securities to be delivered, other than to or
                                    in the name of the registered Holder.


                                    _________________________________________
                                    Signature Guarantee





                                       25
<PAGE>



                      [OPTION OF HOLDER TO ELECT PURCHASE]

      If you wish to have this Security purchased by the Company pursuant to
Section 1401 of the Indenture, check the Box:  / /

      If you wish to have a portion of this Security (which is $1,000 or an
integral multiple thereof) purchased by the Company pursuant to Section 1401 of
the Indenture, state the amount you wish to have purchased:

$_______________________

Date: __________________      Your Signature(s): _____________________________

                                                 _____________________________

                              Tax Identification No.: ________________________

(Sign exactly as your name appears on the face of this Security)



Signature Guarantee:__________________________________________________________



The signature to this option of Holder to elect purchase should be guaranteed by
an eligible guarantor institution (banks, stockbrokers, savings and loan
associations and credit unions with membership in an approved signature
guarantee medallion program) pursuant to SEC Rule 17 Ad - 15.







                                       26
<PAGE>



SECTION 204.   FORM OF TRUSTEE'S CERTIFICATE OF AUTHENTICATION.

      The Trustee's certificate of authentication shall be in substantially the
following form:

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

                        BANKERS TRUST COMPANY, as Trustee



                        By________________________________________
                                    Authorized Signatory




















                                       27
<PAGE>



                                  ARTICLE THREE

                                 THE SECURITIES

SECTION 301.   TITLE AND TERMS.

      The aggregate principal amount of Securities which may be authenticated
and delivered under this Indenture is limited to $25,000,000, except for
Securities authenticated and delivered upon registration of transfer of, or in
exchange for, or in lieu of, other Securities pursuant to Section 304, 305, 306,
906, 1108, 1302 or 1405.

      The Securities shall be known and designated as the "4.5% Convertible
Secured Notes due 2003" of the Company. Their Stated Maturity shall be November
13, 2003 and they shall bear interest at the rate of 4.5% per annum, from the
date of original issuance of Securities pursuant to this Indenture or from the
most recent Interest Payment Date to which interest has been paid or duly
provided for, as the case may be, payable semi-annually on May 13 and November
13 commencing May 13, 1999, until the principal thereof is paid or made
available for payment.

      The principal of and premium, if any, and interest on the Securities shall
be payable in same day funds at the office or agency of the Company maintained
for such purpose pursuant to Section 1002; PROVIDED, HOWEVER, that at the option
of the Company payment of interest to Holders may be made by check mailed to the
address of the Person entitled thereto as such address shall appear in the
Security Register or by transfer to a dollar account maintained by the Holder at
a bank in New York, New York.

      The Securities shall be subject to the transfer restrictions set forth in
Section 305.

      The Securities shall be redeemable as provided in Article Eleven.

      The Securities shall be subordinated in right of payment to Senior
Indebtedness, except with respect to the Collateral as provided in the Security
and Pledge Agreement, as provided in Article Twelve.

      The Securities shall be convertible as provided in Article Thirteen.

      The Securities shall be subject to repurchase at the option of the Holder
as provided in Article Fourteen.

      The Securities shall be secured as provided in Article Fifteen.

SECTION 302.   DENOMINATIONS.

      The Securities shall be issuable only in fully registered form without
coupons and only in denominations of $1,000 and any integral multiple thereof.




                                       28
<PAGE>




SECTION 303.   EXECUTION, AUTHENTICATION, DELIVERY AND DATING.

      The Securities shall be executed on behalf of the Company by its Chairman
of the Board, its Chief Executive Officer, its President or one of its Vice
Presidents, under its corporate seal or a facsimile thereof reproduced thereon
attested by its Secretary or one of its Assistant Secretaries. The signature of
any of these officers on the Securities may be manual or facsimile.

      Securities 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.

      At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Securities 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 such Company
Order shall either at one time or from time to time pursuant to such
instructions as may be described therein authenticate and deliver such
Securities as in this Indenture provided and not otherwise. Such Company Order
shall specify the amount of Securities to be authenticated and the date on which
the original issue of Securities is to be authenticated, and shall certify that
all conditions precedent to the issuance of such Securities contained in this
Indenture have been complied with. The aggregate principal amount of Securities
Outstanding at any time may not exceed the amount set forth above except as
provided in Section 306.

      Each Security shall be dated the date of its authentication.

      No Security shall be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein duly
executed by the Trustee by manual signature, and such certificate upon any
Security shall be conclusive evidence, and the only evidence, that such Security
has been duly authenticated and delivered hereunder and is entitled to the
benefits of the Indenture. The Trustee may appoint an Authenticating Agent
pursuant to the terms of Section 614.

SECTION 304.   TEMPORARY SECURITIES.

      Pending the preparation of Definitive Securities, 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 and with such
appropriate insertions, omissions, substitutions and other variations as the
officers executing such Securities may determine, as evidenced by their
execution of such Securities. Every such temporary Security shall be executed by
the Company and shall be authenticated and delivered by the Trustee upon the
same conditions and in substantially the same manner, and with the same effect
as the Definitive Security or Securities in lieu of which it is issued.




                                       29
<PAGE>




      If temporary Securities are issued, the Company will cause Definitive
Securities to be prepared without unreasonable delay. After the preparation of
Definitive Securities, the temporary Securities shall be exchangeable for
Definitive Securities upon surrender of the temporary Securities at any office
or agency of the Company designated pursuant to Section 1002, without charge to
the Holder. Upon surrender for cancellation of any one or more temporary
Securities the Company shall execute and the Trustee shall authenticate and
deliver in exchange therefor one or more Definitive Securities of a like
principal amount of authorized denominations. Until so exchanged the temporary
Securities shall in all respects be entitled to the same benefits under this
Indenture as Definitive Securities.

SECTION 305.   REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.

      (a) The Company shall cause to be kept at the Corporate Trust Office a
register (the register maintained in such office and in any other office or
agency designated pursuant to Section 1002 being herein sometimes collectively
referred to as the "Security Register") in which, subject to such reasonable
regulations as it may prescribe, the Company shall provide for the registration
of Securities and of transfers of Securities. The Trustee is hereby appointed
"Security Registrar" for the purpose of registering Securities and transfers of
Securities as herein provided. At all reasonable times the Security Register
shall be open for inspection by the Company.

      (b) Until two years after the date of original issuance of the Securities,
each Security certificate (and all Securities issued in exchange therefor or
substitution thereof) shall bear a legend in substantially the following form,
unless otherwise agreed by the Company in writing, with notice to the Trustee
(unless such Security shall be sold pursuant to a registration statement that is
effective at the time of such sale):

      THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION
EXEMPT FROM REGISTRATION AND PROSPECTUS REQUIREMENTS UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), THE ONTARIO SECURITIES ACT AND THE
QUEBEC SECURITIES ACT, AND ANY COMMON SHARES ISSUABLE UPON CONVERSION OF THIS
SECURITY MAY NOT BE SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH
REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.

      THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF NORTH AMERICAN
VACCINE, INC. THAT (A) THIS SECURITY AND ANY COMMON SHARES ISSUABLE UPON ITS
CONVERSION OF THE OF THIS SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE
TRANSFERRED ONLY (1) IN A TRANSACTION EXEMPT FROM THE REGISTRATION REQUIREMENTS
OF THE SECURITIES ACT, OR (2) PURSUANT TO THE EXEMPTION FROM REGISTRATION UNDER
THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE), OR (3)
PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE



                                       30
<PAGE>




SECURITIES ACT (AND WHICH CONTINUES TO BE EFFECTIVE AT THE TIME OF SUCH
TRANSFER) AND IN EACH OF ITEMS (1) THROUGH (3) IN ACCORDANCE WITH ANY APPLICABLE
SECURITIES LAWS OF THE STATES AND OTHER JURISDICTIONS OF THE UNITED STATES, AND
THAT (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY
PURCHASER OF THIS SECURITY, OR ANY COMMON SHARES ISSUABLE UPON CONVERSION OF
THIS SECURITY FROM IT, OTHER THAN UPON TRANSFER PURSUANT TO ITEM (2) OR (3) OF
CLAUSE (A) AS A CONSEQUENCE OF WHICH THIS LEGEND IS REMOVED OR REMOVABLE, OF THE
RESALE RESTRICTIONS REFERRED TO IN CLAUSE (A) ABOVE.

      THIS SECURITY, ANY COMMON SHARES ISSUABLE UPON CONVERSION OF THIS SECURITY
AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME
TO MODIFY THE RESTRICTIONS ON AND PROCEDURES FOR RESALES AND OTHER TRANSFERS OF
ANY SUCH SECURITIES TO REFLECT ANY CHANGE IN APPLICABLE LAW OR REGULATION (OR
THE INTERPRETATION THEREOF) OR IN PRACTICES RELATING TO THE RESALE OR TRANSFER
OF RESTRICTED SECURITIES GENERALLY. THE HOLDER OF THIS SECURITY AND ANY COMMON
SHARES ISSUABLE UPON CONVERSION OF THIS SECURITY SHALL BE DEEMED BY THE
ACCEPTANCE OF THIS SECURITY, AND ANY COMMON SHARES ISSUABLE UPON CONVERSION OF
THIS SECURITY TO HAVE AGREED TO ANY SUCH AMENDMENT OR SUPPLEMENT.

      (c) All Securities issued upon any registration of transfer or exchange of
Securities shall be the 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.

      (d) To the extent requested by the Trustee, all Securities the transfer,
exchange and/or registration of which is effectuated pursuant to this Section
305 shall be accompanied by an Officers' Certificate of the Company, certifying
that such transfer, exchange and/or registration is authorized by the Company
and permitted hereunder.

      (e) Any Security or Common Shares issued upon the conversion or exchange
of a Security that, on or prior to two years after the original issuance of the
Securities, is purchased or owned by the Company or any Affiliate thereof may
not be resold by the Company or such Affiliate unless registered under the
Securities Act or resold pursuant to an exemption from the registration
requirements of the Securities Act in a transaction which results in such
Securities or Common Shares issuable upon conversion thereof, as the case may
be, no longer being "restricted securities" (as defined under Rule 144).

      (f) To permit registrations of transfer and exchanges, the Company shall
execute and the Trustee shall authenticate Securities at the Security
Registrar's request.

      (g) No service charge to a Holder shall be made for any registration of
transfer or exchange of Securities except as provided in Section 306. The
Company may require payment of a sum sufficient to cover any tax or other



                                       31
<PAGE>




governmental charge that may be imposed in connection with any registration of
transfer or exchange of Securities, other than exchanges pursuant to Section
304, 906, 1108, 1302 or 1405 not involving any transfer.

      (h) The Company or the Security Registrar shall not be required (i) to
issue, register the transfer of or exchange any Security during a period
beginning at the opening of business 15 days before the day of the mailing of a
notice of redemption of Securities selected for redemption under Section 1104
and ending at the close of business on the day of such mailing, (ii) to register
the transfer of or exchange any Security selected for redemption in whole or in
part, except the unredeemed portion of any Security being redeemed in part or
(iii) to register the transfer of or exchange of any Security surrendered for
conversion pursuant to Article Thirteen or repurchase (and not withdrawn)
pursuant to Article Fourteen.

SECTION 306.   MUTILATED, DESTROYED, LOST AND STOLEN SECURITIES.

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

      If there shall be delivered to the Company and the Trustee (i) evidence to
their satisfaction of the destruction, loss or theft of any Security and (ii)
such security or indemnity as may be required by them to save each of them and
any agent of either of them harmless, then, in the absence of notice to the
Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen Security, a new Security
of like tenor and principal amount and bearing a number not contemporaneously
outstanding. The Trustee may charge the Company for the Trustee's expenses in
replacing such Security.

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

      Upon the issuance of any new Security under this Section, the Company may
require the payment of a sum sufficient to cover any tax or other governmental
charge that may be imposed in relation thereto and any other expenses (including
the fees and expenses of the Trustee) connected therewith.

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




                                       32
<PAGE>




SECTION 307.   PAYMENT OF INTEREST; INTEREST RIGHTS PRESERVED.

      Interest on any Security which is payable, and is punctually paid or duly
provided for, on any Interest Payment Date shall be paid to the Person in whose
name that Security (or one or more Predecessor Securities) is registered at the
close of business on the Regular Record Date for such interest. Payment of
interest will be made in same day funds at the office or agency of the Trustee
in New York, New York or at such other office or agency of the Company as it
shall maintain for that purpose pursuant to Section 1002, PROVIDED, HOWEVER,
that, at the option of the Company, interest on any Security may be paid by
mailing checks to the addresses of the Holders thereof as such addresses appear
in the Securities Register or by transfer to a dollar account maintained by a
Holder at a bank in New York, New York.

      Any interest on any Security which is payable, but is not punctually paid
or duly provided for, on any Interest Payment Date (herein called "Defaulted
Interest") shall forthwith cease to be payable to the Holder on the 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 Securities (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 Security and the date of the
proposed payment, and at the same time the Company shall deposit with the
Trustee an amount of money equal to the aggregate amount proposed to be paid in
respect of such Defaulted Interest or shall make arrangements satisfactory to
the Trustee for such deposit 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 sent certified or registered mail,
postage prepaid, to each Holder 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 so mailed, such Defaulted Interest shall be paid to the Persons in
whose names the Securities (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).

      (2) The Company may make payment of any Defaulted Interest in any other
lawful manner not inconsistent with the requirements of any securities exchange
on which the 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



                                       33
<PAGE>




proposed payment pursuant to this Clause, such manner of payment shall be deemed
practicable by the Trustee.

      Subject to the foregoing provisions of this Section, 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. In the
case of any Security which is converted after the close of business on any
Regular Record Date and before the close of business on the Business Day
immediately preceding such Interest Payment Date (other than any Security whose
Maturity is prior to such Interest Payment Date in which case interest will not
be payable on such Interest Payment Date), interest shall be payable on such
Interest Payment Date notwithstanding such conversion, and such interest
(whether or not punctually paid or duly provided for) 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 such Regular Record Date; PROVIDED,
HOWEVER, that Securities so surrendered for conversion shall (except in the case
of Securities or portions thereof called for redemption which is addressed in
Section 1302 below) be accompanied by payment in funds acceptable to the Company
of an amount equal to the interest payable on such Interest Payment Date on the
principal amount being surrendered for conversion. Except as otherwise expressly
provided above in subsection (2) and in Section 1302, in the case of any
Security which is converted, interest whose Stated Maturity is after the date of
conversion of such Security shall not be payable.

SECTION 308.   PERSONS DEEMED OWNERS.

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

SECTION 309.   CANCELLATION.

      All Securities surrendered for payment, redemption, registration of
transfer, exchange or conversion shall, if surrendered to any Person other than
the Trustee, be delivered to the Trustee and shall be promptly canceled 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 all Securities so delivered
shall be promptly canceled by the Trustee. No Securities shall be authenticated
in lieu of or in exchange for any Securities canceled as provided in this
Section, except as expressly permitted by this Indenture. All canceled
Securities held by the Trustee shall be destroyed by the Trustee, unless
otherwise directed by a Company Order.




                                       34
<PAGE>




SECTION 310.   COMPUTATION OF INTEREST.

      Interest on the Securities shall be computed on the basis of a 360-day
year of twelve 30-day months.

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

SECTION 401.   SATISFACTION AND DISCHARGE OF INDENTURE.

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

      (1)   either

            (A) all Securities theretofore authenticated and delivered (other
than (i) Securities which have been destroyed, lost or stolen and which have
been replaced or paid as provided in Section 306 and (ii) Securities 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 such Securities not theretofore delivered to the Trustee for
      cancellation

                  (i)   have become due and payable, or

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

                  (iii) 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, or

                  (iv) are delivered to the Conversion Agent for Conversion in
accordance with Article Thirteen or to the Trustee for repurchase in accordance
with Article Fourteen, and the Company, in the case of (i), (ii), (iii) or (iv)
above, has irrevocably deposited or caused to be deposited with the Trustee as
trust funds in trust for the purpose an amount in cash sufficient (without
consideration of any investment of such cash) to pay and discharge the entire
indebtedness on such Securities not theretofore delivered to the Trustee for
cancellation for principal and premium or Additional Amounts, if any, and
interest 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, PROVIDED that the Trustee shall have been irrevocably instructed to
apply such amount to said payments with respect to the Securities;




                                       35
<PAGE>




      (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 have
been complied with.

      Notwithstanding the satisfaction and discharge of this Indenture, the
following rights or obligations under the Securities and this Indenture shall
survive until otherwise terminated or discharged hereunder: (a) Article
Thirteen, Article Fourteen and the Company's obligations under Sections 304,
305, 306, 1002 and 1003, in each case with respect to any Securities described
in subclause (B) of Clause (l) of this Section, (b) this Article Four, (c) the
rights, powers, trusts, duties and immunities of the Trustee hereunder,
including the obligations of the Company to the Trustee under Section 607, and
the obligations of the Company to any Authenticating Agent under Section 614 and
(d) if money shall have been deposited with the Trustee pursuant to subclause
(B) of Clause (1) of this Section, the rights of Holders of any Securities
described in subclause (B) of Clause (1) of this Section to receive, solely from
the trust fund described in such subclause (B), payments in respect of the
principal of, and premium and Additional Amounts (if any) and interest on, such
Securities when such payment are due.

SECTION 402.   APPLICATION OF TRUST MONEY.

      Subject to the provisions of the last paragraph of Section 1003 and
Section 506, 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 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 and Additional Amounts, if any, and interest for whose payment such
money has been deposited with the Trustee. All moneys deposited with the Trustee
pursuant to Section 401 (and held by it or any Paying Agent) for the payment of
Securities subsequently converted shall be returned to the Company upon Company
Request.

SECTION 403.   REINSTATEMENT.

      If the Trustee or the Paying Agent is unable to apply any money in
accordance with this Article Four by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, then the Company's obligations under this Indenture and the
Securities shall be revived and reinstated as though no deposit had occurred
pursuant to this Article Four until such time as the Trustee or Paying Agent is
permitted to apply all money held in trust with respect to the Securities;
provided, however, that if the Company makes any payment of principal of, or any
premium or Additional Amounts or interest on, any Security following the
reinstatement of its obligations, the Company shall be subrogated to the rights
of the Holders of the Securities to receive such payment from the money so held
in trust.




                                       36
<PAGE>




                                  ARTICLE FIVE

                                    REMEDIES

SECTION 501.   EVENTS OF DEFAULT.

      "Event of Default," wherever used herein, means any one of the following
events (whatever the reason for such Event of Default and whether it shall be
occasioned by the provisions of Article Twelve or 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 the principal of, or premium or Additional
Amounts, if any, on any Security at its Maturity, whether or not such payment is
prohibited by the provisions of Article Twelve; or

      (2) default in the payment of any interest upon any Security when it
becomes due and payable, whether or not such payment is prohibited by the
provisions of Article Twelve, and continuance of such default for a period of 30
days; or

      (3) failure by the Company to provide timely notice of a Repurchase Event
as required in accordance with the provisions of Article Fourteen; or

      (4) default in the payment of the Repurchase Price in respect of any
Security on the Repurchase Date therefor in accordance with the provisions of
Article Fourteen, whether or not such payment is prohibited by the provisions of
Article Twelve; or

      (5) default in the performance, or breach, of any covenant or warranty of
the Company in this Indenture or the Security and Pledge Agreement (other than a
covenant or warranty 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 by the Trustee or to the Company and the Trustee
by the Holders of at least 25% in principal amount of the Outstanding Securities
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

      (6) default under one or more bonds, debentures, notes or other evidences
of indebtedness for money borrowed by the Company or any Subsidiary or under one
or more mortgages, indentures or instruments under which there may be issued or
by which there may be secured or evidenced any indebtedness for money borrowed
by the Company or any Subsidiary, whether such indebtedness now exists or shall
hereafter be created, which default individually or in the aggregate shall
constitute a failure to pay the principal of indebtedness in excess of
$10,000,000 when due and payable after the expiration of any applicable grace
period with respect thereto or shall have resulted in indebtedness in excess of
$10,000,000 becoming or being declared due and payable prior to the date on
which it would otherwise have become due and payable, without such indebtedness
having been discharged, or such acceleration having been rescinded or annulled,



                                       37
<PAGE>




within a period of 30 days after there shall have been given, by registered or
certified mail, to the Company by the Trustee or to the Company and the Trustee
by the Holders of at least 25% in principal amount of the Outstanding Securities
a written notice specifying such default and requiring the Company to cause such
indebtedness to be discharged or cause such acceleration to be rescinded or
annulled and stating that such notice is a "Notice of Default" hereunder; or

      (7)(A) a court of competent jurisdiction shall enter a decree or order for
relief in respect of the Company in any involuntary case under any Bankruptcy
Law or any applicable bankruptcy, insolvency or other similar law now or
hereafter in effect, which decree or order is not stayed; or any other similar
relief shall be granted under any applicable federal or state law; (B) a decree
or order of a court of competent jurisdiction for the appointment of a receiver,
liquidator, sequestrator, trustee, Custodian or other officer having similar
powers over the Company, or over all of or a substantial part of its or their
respective properties, shall have been entered; or the involuntary appointment
of an interim receiver, trustee or other Custodian (defined below) of the
Company for all or a substantial part of its or their respective properties; or
the issuance of a warrant of attachment, execution or similar process against
any substantial part of the property of the Company or any of its Subsidiaries
and the continuance of any such events in subpart (B) for 45 days unless stayed
or discharged; or

      (8) the Company (A) shall have an order for relief entered with respect to
it or commences a voluntary case under any Bankruptcy Law or any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect; (B)
shall consent to the entry of an order for relief in an involuntary case, or to
the conversion to an involuntary case, under any such law; (C) shall consent to
the appointment of or taking possession by a receiver, trustee or other
custodian for all or a substantial part of its property; (D) shall have made a
general assignment for the benefit of creditors of a substantial part of its or
their assets; (E) shall admit in writing of its inability to pay its debts as
such debts become due; or (F) the Board of Directors of the Company (or any
committee thereof) adopts any resolution which has not been rescinded or
otherwise authorizes or approves any of the foregoing; or

      (9) The occurrence of a Change of Control; PROVIDED, that such Event of
Default will be cured after a Change of Control notice has been sent and all
Securities properly tendered for purchase pursuant to such notice are accepted
for payment and such payment provided in the notice is made, as described in
Article Fourteen.

      The term "Bankruptcy Law" means Title 11, U.S. Code or any similar federal
or state law for the relief of debtors or the Bankruptcy Act (Canada), the
Companies Creditor Arrangement Act (Canada) or any other Canadian federal or
provincial law or the law of any other jurisdiction relating to the relief of
debtors. The term "Custodian" means any receiver, trustee, assignee, liquidator,
sequestrator or similar official under any Bankruptcy Law.

SECTION 502.   ACCELERATION OF MATURITY; RESCISSION AND ANNULMENT.

      If an Event of Default (other than as specified in subparagraph (7) or (8)
of Section 501) 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 may declare the principal of all the Securities to be due



                                       38
<PAGE>




and payable immediately, by a notice in writing to the Company (and to the
Trustee if given by Holders), and upon any such declaration such principal plus
any interest accrued on the Securities to the date of declaration shall become
immediately due and payable. If an Event of Default specified in subparagraph
(7) or (8) of Section 501 occurs and is continuing with respect to the Company,
then the principal of, premium and Additional Amounts, if any, and accrued and
unpaid interest, if any, on all of the Securities 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 of Securities.

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

      (l)   the Company has paid or deposited with the Trustee a sum
sufficient to pay

            (A)   all overdue interest on all Securities,

            (B) the principal of and premium and Additional Amounts, if any, on
any Securities which have become due otherwise than by such declaration of
acceleration and interest thereon at the rate borne by the Securities,

            (C) to the extent that payment of such interest is lawful, interest
upon overdue interest at the rate borne by the Securities, and

            (D) all sums paid or advanced by the Trustee and each predecessor
Trustee, their respective agents and counsel hereunder and the reasonable
compensation, expenses, disbursements and advances of the Trustee and each
predecessor Trustee, their respective agents and counsel; and

      (2) all Events of Default, other than the nonpayment of the principal of,
premium, and Additional Amounts, if any, and interest on the Securities that has
become due solely by such declaration of acceleration, have been cured or waived
as provided in Section 513. No such rescission and waiver shall affect any
subsequent default or impair any right consequent thereon.

      Upon receipt by the Trustee of any declaration of acceleration, or any
rescission and annulment of any such declaration, pursuant to this Section 502,
a record date shall automatically and without any other action by any Person be
set for the purpose of determining the Holders of Outstanding Securities
entitled to join in such declaration, or rescission and annulment, as the case
may be, which record date shall be the close of business on the day the Trustee
receives such declaration, or rescission and annulment, as the case may be. The
Holders of Outstanding Securities on such record date (or their duly appointed
agents), and only such Persons, shall be entitled to join in such declaration,
or rescission and annulment, as the case may be, whether or not such Holders



                                       39
<PAGE>




remain Holders after such record date; PROVIDED, that unless such declaration,
or rescission and annulment, as the case may be, shall have become effective by
virtue of Holders of the requisite principal amount of Outstanding Securities on
such record date (or their duly appointed agents) having joined therein on or
prior to the 90th day after such record date, such declaration, or rescission
and annulment, as the case may be, shall automatically and without any action by
any Person be canceled and of no further force or effect.

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 interest on any Security when
such interest 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 and
Additional Amounts, if any, on any Security at the Maturity thereof, the Company
will, upon demand of the Trustee, pay to it, for the benefit of the Holders of
such Securities, the whole amount then due and payable on such Securities for
principal of, and premium, if any, and interest, and, to the extent that payment
of such interest shall be legally enforceable, interest, on any overdue
principal and premium, if any, and on any overdue interest, at the rate borne by
the 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 and
each predecessor Trustee, their respective agents and counsel, and any other
amounts due the Trustee or any predecessor Trustee under Section 607.

      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 the collection of the sums so due and unpaid and may
prosecute any such proceeding to judgment or final decree, and may enforce the
same against the Company (or any other obligor upon the Securities) and collect
the moneys adjudged or decreed to be payable in the manner provided by law out
of the property of the Company (or any other obligor upon the Securities),
including Collateral under the Security and Pledge Agreement wherever situated.

      If an Event of Default occurs and is continuing, the Trustee may in its
discretion proceed to protect and enforce its rights and the rights of the
Holders 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 any judicial proceeding relative to the Company (or any other
obligor upon the Securities), its property or its creditors, the Trustee shall
be entitled and empowered, by intervention in such proceeding or otherwise, to
take any and all actions authorized under the Trust Indenture Act in order to
have the claims of the Holders and the Trustee allowed in any such proceeding.
In particular, the Trustee shall be authorized to collect and receive any moneys
or other property payable or deliverable on any such claims and to distribute



                                       40
<PAGE>




the same; and any custodian, receiver, assignee, trustee, liquidator,
sequestrator or other similar official in any such judicial proceeding is hereby
authorized by each Holder to make such payments to the Trustee and, in the event
that the Trustee shall consent to the making of such payments directly to the
Holders, to pay to the Trustee any amount due it and each predecessor Trustee
for the reasonable compensation, expenses, disbursements and advances of the
Trustee and each predecessor Trustee and their respective agents and counsel,
and any other amounts due the Trustee under Section 607.

      No provision of this Indenture shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding; PROVIDED, HOWEVER,
that the Trustee may, on behalf of the Holders, vote for the election of a
trustee in bankruptcy or similar official and may be a member of the Creditors'
Committee.

SECTION 505.   TRUSTEE MAY ENFORCE CLAIMS WITHOUT POSSESSION OF SECURITIES.

      All rights of action and claims under this Indenture or the Securities may
be prosecuted and enforced by the Trustee without the possession of any of the
Securities or the production thereof in any proceeding relating thereto, and any
such proceeding instituted by the Trustee shall be brought in its own name as
trustee of an express trust, and any recovery of judgment shall, after provision
for the payment of the reasonable compensation, expenses, disbursements and
advances of the Trustee and each predecessor Trustee and their respective agents
and counsel, be for the ratable benefit of the Holders of the Securities 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 and
Additional Amounts, if any, or interest, upon presentation of the Securities and
the notation thereon of the payment if only partially paid and upon surrender
thereof if fully paid:

      FIRST: To payment of all amounts due the Trustee under Section 607;

      SECOND: Subject to Article Twelve and the Security and Pledge
Agreement, to the holders of Senior Indebtedness;

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




                                       41
<PAGE>




      FOURTH: The balance, if any, to the Company or any other Person or Persons
determined to be entitled thereto upon provision of an Officer's Certificate or
other evidence reasonably satisfactory to the Trustee by the Company or such
other person verifying such entitlement.

SECTION 507.   LIMITATION ON SUITS.

      No Holder of any Security 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;

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

      (3) such Holder or Holders have offered to the Trustee reasonable
indemnity satisfactory to it 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; it being understood and intended that no
one or more 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 Holders, or to obtain or to seek to obtain priority or
preference over any other Holders or to enforce any right under this Indenture,
except in the manner herein provided and for the equal and ratable benefit of
all the Holders.

SECTION 508.   UNCONDITIONAL RIGHT OF HOLDERS TO RECEIVE PRINCIPAL,
               PREMIUM, ADDITIONAL AMOUNTS AND INTEREST AND TO CONVERT.

      Notwithstanding any other provision in this Indenture, the Holder of any
Security shall have the right, which is absolute and unconditional, to receive
payment of the principal of and premium and Additional Amounts, if any, and
(subject to Section 307) interest on such Security on the respective Stated
Maturities expressed in such Security (or, in the case of redemption, on the
Redemption Date or, in the case of a repurchase pursuant to Article Fourteen, on
the Repurchase Date) and to convert such Security in accordance with Article
Thirteen and to institute suit for the enforcement of any such payment and right
to convert, and such rights shall not be impaired without the consent of such
Holder.




                                       42
<PAGE>




SECTION 509.   RESTORATION OF RIGHTS AND REMEDIES.

      If the Trustee or any Holder has instituted any proceeding to enforce any
right or remedy under this Indenture and such proceeding 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, subject to any determination in
such proceeding, the Company, the Trustee and the Holders shall 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 in Section 306, no right or
remedy herein conferred upon or reserved to the Trustee or to the Holders is
intended to be exclusive of any other right or remedy, and every right and
remedy shall, to the extent permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or otherwise. The assertion or employment of any right or remedy
hereunder, or otherwise, shall not prevent the concurrent assertion or
employment of any other appropriate right or remedy.

SECTION 511.   DELAY OR OMISSION NOT WAIVER.

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

SECTION 512.   CONTROL BY HOLDERS.

      The Holders of a majority in principal amount of the Outstanding
Securities 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, including, without limitation,
powers conferred on it by the Security and Pledge Agreement; PROVIDED, that

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

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

      (3) subject to the provisions of Section 601, the Trustee shall have the
right to decline to follow any such direction if the Trustee in good faith shall
determine that the action so directed would involve the Trustee in personal
liability or would be unduly prejudicial to Holders not joining in such
direction.




                                       43
<PAGE>




      Upon receipt by the Trustee of any such direction, a record date shall
automatically and without any other action by any Person be set for the purpose
of determining the Holders of Outstanding Securities entitled to join in such
direction, which record date shall be the close of business on the day the
Trustee receives such direction. The Holders of Outstanding Securities on such
record date (or their duly appointed agents), and only such Persons, shall be
entitled to join in such direction, whether or not such Holders remain Holders
after such record date; PROVIDED, that unless such direction shall have become
effective by virtue of Holders of the requisite principal amount of Outstanding
Securities on such record date (or their duly appointed agents) having joined
therein on or prior to the 90th day after such record date, such direction shall
automatically and without any action by any Person be canceled and of no further
force or effect.

SECTION 513.   WAIVER OF PAST DEFAULTS.

      The Holders of not less than a majority in principal amount of the
Outstanding Securities may on behalf of the Holders of all the Securities waive
any past default hereunder or under the Security and Pledge Agreement and its
consequences, except a default

      (1)   in the payment of the principal of or premium and Additional
Amounts, if any, or interest on any Security,

      (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 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 impair any right consequent thereon.

SECTION 514.   UNDERTAKING FOR COSTS.

      In any suit for the enforcement of any right or remedy under this
Indenture, or in any suit against the Trustee for any action taken, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; PROVIDED, that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company, in any suit instituted
by the Trustee, a suit by a Holder pursuant to Section 508, or a suit by a
Holder or Holders of more than 10% in principal amount of the outstanding
Securities.




                                       44
<PAGE>




                                   ARTICLE SIX

                                   THE TRUSTEE

SECTION 601.   CERTAIN DUTIES AND RESPONSIBILITIES.

      The duties and responsibilities of the Trustee shall be as provided by
this Indenture and the Trust Indenture Act for securities issued pursuant to
indentures qualified thereunder. Except as otherwise provided herein,
notwithstanding the foregoing, no provision of this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur any financial
liability or risk 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 satisfactory to it
against such risk or liability is not reasonably assured to it. Whether or not
therein expressly so provided, every provision of this Indenture relating to the
conduct or affecting the liability of or affording protection to the Trustee
shall be subject to the provisions of this Section. The Trustee shall not be
liable (x) for any error of judgment made in good faith by a Responsible Officer
or Responsible Officers of the Trustee, unless it shall be proved that the
Trustee was grossly negligent in ascertaining the pertinent facts or (y) 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 not less than a majority in
aggregate principal amount of the Securities at the time Outstanding relating to
the time, method and place of conducting any proceeding or any remedy available
to the Trustee, or exercising any trust or power conferred upon the Trustee,
under this Indenture. Prior to the occurrence of an Event of Default and after
the curing or waiving of all Events of Default which may have occurred: (i) the
duties and obligations of the Trustee shall be determined solely by the express
provisions of this Indenture and in the Trust Indenture Act, and the Trustee
shall not be liable except for the performance of such duties and obligations as
are specifically set forth in this Indenture and in the Trust Indenture Act, and
no implied covenants or obligations shall be read in to this Indenture against
the Trustee; and (ii) in the absence of bad faith on the part of the Trustee,
the Trustee may conclusively rely, as to the truth of the statements and the
correctness of the opinions therein, upon any statements, certificates or
opinions furnished to the Trustee and conforming to the requirements of this
Indenture and believed by the Trustee to be genuine and to have been signed or
presented by the proper party or parties; but in the case of any such
statements, certificates or opinions which by any provisions hereof are
specifically required to be furnished to the Trustee, the Trustee shall be under
a duty to examine the same to determine whether or not they conform on their
face to the requirements of this Indenture. If a default or an Event of Default
has occurred and is continuing, the Trustee shall exercise the rights and powers
vested in it by this Indenture and use the same degree of care and skill in its
exercise thereof as a prudent Person would exercise or use under the
circumstances in the conduct of his own affairs.

SECTION 602.   NOTICE OF DEFAULTS.

      The Trustee shall give the Holders notice of any default hereunder of
which a Responsible Officer has received written notice as and to the extent
provided by the Trust Indenture Act; PROVIDED, HOWEVER, that in the case of any
default of the character specified in Section 501(5), no such notice to Holders



                                       45
<PAGE>




shall be given until at least 30 days after the occurrence thereof. For the
purpose of this Section, the term "default" means any event which is, or after
notice or lapse of time or both would become, an Event of Default.

SECTION 603.   CERTAIN RIGHTS OF TRUSTEE.

      Subject to the provisions of Section 601:

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

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

      (c) whenever in the administration of this Indenture the Trustee shall
deem it desirable that a matter be proved or established prior to taking,
suffering or omitting any action hereunder, the Trustee (unless other evidence
be herein specifically prescribed) may, in the absence of bad faith on its part,
rely conclusively upon an Officers' Certificate;

      (d) the Trustee may consult with counsel 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;

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

      (f) before the Trustee acts or refrains from acting with respect to any
matter contemplated by this Indenture, it may require an Officers' Certificate
or an Opinion of Counsel, which shall conform to the provisions of Section 102,
and the Trustee shall be protected and shall not be liable for any action it
takes or omits to take in good faith and without gross negligence in reliance on
such certificate or opinion;

      (g) the Trustee shall not be required to give any bond or surety in
respect of the performance of its power and duties hereunder;

      (h) the Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, other evidence of indebtedness or other paper or document, but the



                                       46
<PAGE>




Trustee, in its discretion, may make such further inquiry or investigation into
such facts or matters as it may see fit, and, if the Trustee shall determine to
make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Company, personally or by agent or attorney;

      (i) 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;

      (j) the Trustee shall not be deemed to have actual knowledge of a default
or Event of Default until a Responsible Officer shall have received written
notice thereof;

      (k) 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 relating
to the time, method and place of conducting any proceeding for any remedy
available to the Trustee, or exercising any trust power conferred upon the
Trustee, under this Indenture;

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

      (m) The Trustee shall not be responsible for the recording, rerecording,
or filing of UCC Statements or UCC Continuation Statements; and

      (n) The permissive right of the Trustee to do things enumerated in this
Indenture shall not be construed as a duty, and the Trustee shall not be
answerable for other than its gross negligence or willful misconduct.

SECTION 604.   NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES.

      The recitals contained herein and in the Securities, except the Trustee's
certificate of authentication, shall be taken as the statements of the Company,
and the Trustee and any Authenticating Agent assume no responsibility for their
correctness. The Trustee makes no representations as to the validity or
sufficiency of this Indenture, the Security and Pledge Agreement, the Collateral
or of the Securities. The Trustee and any Authenticating Agent shall not be
accountable for the use or application by the Company of Securities or the
proceeds thereof.

SECTION 605.   MAY HOLD SECURITIES.

      The Trustee, any Authenticating Agent, any Paying Agent, any Security
Registrar or any other agent of the Company, in its individual or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
608 and 613, may otherwise deal with the Company with the same rights it would



                                       47
<PAGE>




have if it were not Trustee, Authenticating Agent, Paying Agent, Security
Registrar or such other agent.

SECTION 606.   MONEY HELD IN TRUST.

      Money held by the Trustee or any Paying Agent in trust hereunder need not
be segregated from other funds except to the extent required by law. The Trustee
or any Paying Agent shall be under no liability for interest on any money
received by it hereunder except as otherwise agreed with the Company.

SECTION 607.   COMPENSATION AND REIMBURSEMENT.

      The Company agrees:

      (l) to pay to the Trustee from time to time reasonable compensation for
all services rendered by it hereunder and under the Security and Pledge
Agreement (including its services as Security Registrar or Paying Agent or
Conversion Agent, or any other agency capacity if so appointed by the Company)
as may be mutually agreed upon in writing by the Company and the Trustee (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 the
Trustee and each predecessor Trustee upon its request for all reasonable
expenses, disbursements and advances incurred or made by or on behalf of it in
connection with the performance of its duties under any provision of this
Indenture and under the Security and Pledge Agreement (including the reasonable
compensation and the expenses and disbursements of its agents and counsel and
all other persons not regularly in its employ) except to the extent any such
expense, disbursement or advance may be attributable to its gross negligence or
bad faith; and

      (3) to indemnify the Trustee (which for purposes of this subsection shall
include its directors, officers, employees and agents) and each predecessor
Trustee (each an "indemnitee") for, and to hold it harmless against, any loss,
liability or expense incurred without gross negligence or bad faith on its part,
arising out of or in connection with the acceptance or administration of this
Indenture or the trusts hereunder and its duties hereunder and under the
Security and Pledge Agreement (including its services as Security Registrar or
Paying Agent, if so appointed by the Company), including enforcement of this
Section 607 and including the costs and expenses of defending itself against or
investigating any claim or liability in connection with the exercise or
performance of any of its powers or duties hereunder. The Company at the request
of an indemnitee shall defend any claim or threatened claim asserted against an
indemnitee for which it may seek indemnity, and the indemnitee shall cooperate
in the defense unless, in the reasonable opinion of the indemnitee's counsel,
the indemnitee has an interest adverse to the Company or a potential conflict of
interest exists between the indemnitee and the Company, in which case the
indemnitee may have separate counsel and the Company shall pay the reasonable
fees and expenses of such counsel; PROVIDED that the Company shall only be
responsible for the reasonable fees and expenses of one law firm (in addition to
local counsel) in any one action or separate substantially similar actions in
the same jurisdiction arising out of the same general allegations or



                                       48
<PAGE>




circumstances, such law firm to be designated by the indemnitee. This indemnity
shall survive the termination of the Indenture and the resignation or removal of
the Trustee.

      As security for the performance of the obligations of the Company under
this Section 607, the Trustee shall have a lien prior to the Securities upon all
property and funds held or collected by the Trustee as such, except funds held
in trust for the benefit of the Holders of particular Securities, and the
Securities are hereby subordinated to such prior lien. The obligations of the
Company under this Section to compensate and indemnify the Trustee and any
predecessor Trustee and to pay or reimburse the Trustee and any predecessor
Trustee for expenses, disbursements and advances, and any other amounts due the
Trustee or any predecessor Trustee under Section 607, shall constitute an
additional obligation hereunder and shall survive the satisfaction and discharge
of this Indenture.

      The Company agrees to pay by wire transfer on or prior to the Closing Date
the fees and expenses of counsel to the Trustee incurred in connection with the
preparation, delivery and execution of this Indenture and the Security and
Pledge Agreement.

      When the Trustee or any predecessor Trustee incurs expenses or renders
services in connection with the performance of its obligations hereunder
(including its services as Security Registrar or Paying Agent, if so appointed
by the Company) after an Event of Default specified in Section 501(7) or (8)
occurs, the expenses and the compensation for the services are intended to
constitute expenses of administration under any applicable bankruptcy,
insolvency or other similar federal or state law or analogous foreign law to the
extent provided in Section 503(b)(5) of Title 11 of the United States Code, as
now or hereafter in effect.

SECTION 608.   INTENTIONALLY LEFT BLANK.

SECTION 609.   CORPORATE TRUSTEE REQUIRED; ELIGIBILITY.

      There shall at all times be a Trustee hereunder which shall be a Person
that (i) is eligible pursuant to the Trust Indenture Act to act as such, (ii)
has (or, in the case of a corporation included in a bank holding company system,
whose related bank holding company has) a combined capital and surplus of at
least $50,000,000 and (iii) has an office where it provides corporate trust
services, or at which it is authorized to receive notices hereunder, in the
Borough of Manhattan, The City of New York, or a designated agent. If such
Person publishes reports of condition at least annually, pursuant to law or to
the requirements of a Federal or state supervising or examining authority, then
for the purposes of this Section, the combined capital and surplus of such
Person 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.




                                       49
<PAGE>




SECTION 610.   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 611.

      (b) The Trustee may resign at any time by giving written notice thereof to
the Company. If an instrument of acceptance by a successor Trustee required by
Section 611 shall not have been delivered to the resigning Trustee within 30
days after the giving of such notice of resignation, the resigning Trustee may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

      (c) The Trustee may be removed at any time by an Act of the Holders of a
majority in principal amount of the Outstanding Securities delivered to the
Trustee and to the Company.

      (d) If at any time:

            (1) the Trustee shall fail to comply with Section 608 after written
request therefor by the Company or by any Holder who has been a bona fide Holder
of a Security for the last six months, or

            (2) the Trustee shall cease to be eligible under Section 609 and
shall fail to resign after written request therefor by the Company or by any
such Holder, or

            (3) the Trustee shall become incapable of acting or shall be
adjudged a bankrupt or insolvent or a receiver of the Trustee or of its property
shall be appointed or any public officer shall take charge or control of the
Trustee or of its property or affairs for the purpose of rehabilitation,
conservation or liquidation, then, in any such case, (i) the Company by a Board
Resolution may remove the Trustee, or (ii) subject to Section 5l4, any Holder
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 and the appointment of a
successor Trustee.

      (e) If the Trustee shall resign, be removed or become incapable of acting,
or if a vacancy shall occur in the office of Trustee for any cause, the Company,
by a Board Resolution, shall promptly appoint a successor Trustee and such
successor Trustee shall comply with the applicable requirements of Section 611.
If, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee shall be appointed by Act of the
Holders of a majority in principal amount of the Outstanding Securities
delivered to the Company and the retiring Trustee, the successor Trustee so
appointed shall, forthwith upon its acceptance of such appointment in accordance
with the applicable requirements of Section 611, become the successor Trustee
and supersede the successor Trustee appointed by the Company. If no successor
Trustee shall have been so appointed by the Company or the Holders and accepted
appointment in the manner required by Section 611, any Holder 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 appointment of a successor Trustee.




                                       50
<PAGE>




      (f) The Company shall give notice of each resignation and each removal of
the Trustee and each appointment of a successor Trustee to all Holders in the
manner provided in Section 106. Each notice shall include the name of the
successor Trustee and the address of its Corporate Trust Office.

SECTION 611.   ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

      Every successor Trustee appointed hereunder 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. 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.

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 612.   MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS.

      Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
(including the trust created by this Indenture) of the Trustee, shall be the
successor of the Trustee hereunder, PROVIDED such corporation shall be otherwise
qualified and eligible under this Article, without the execution or filing of
any paper or any further act on the part of any of the parties hereto. In case
any Securities shall have been authenticated, but not delivered, by the Trustee
then in office, any successor by merger, conversion or consolidation to such
authenticating Trustee may adopt such authentication and deliver the Securities
so authenticated with the same effect as if such successor Trustee had itself
authenticated such Securities.

SECTION 613.   INTENTIONALLY LEFT BLANK.

SECTION 614.   APPOINTMENT OF AUTHENTICATING AGENT.

      The Trustee may appoint an Authenticating Agent or Agents acceptable to
and at the expense of the Company which shall be authorized to act on behalf of
the Trustee to authenticate Securities issued upon exchange, registration of
transfer, partial conversion or partial redemption, but not upon original
issuance or pursuant to Section 306, and Securities so authenticated shall be
entitled to the benefits of this Indenture and shall be valid and obligatory for
all purposes as if authenticated by the Trustee hereunder. Wherever reference is
made in this Indenture to the authentication and delivery of Securities by the



                                       51
<PAGE>




Trustee or the Trustee's certificate of authentication, such reference shall,
but not upon original issuance or pursuant to Section 306, be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each Authenticating Agent shall be acceptable to the
Company and shall at all times be a Person organized and doing business under
the laws of the United States of America, any State thereof or the District of
Columbia, authorized under such laws to act as Authenticating Agent, having (or,
in case of a corporation included in a bank holding company system, its bank
holding company shall have) a combined capital and surplus of not less than
$50,000,000 and subject to supervision or examination by Federal or State
authority. If such Authenticating Agent publishes reports of condition at least
annually, pursuant to law or to the requirements of said supervising or
examining authority, then for the purposes of this Section, the combined capital
and surplus of such Authenticating Agent shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time an Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section, such Authenticating Agent shall
resign immediately in the manner and with the effect specified in this Section.

      Any Person into which an Authenticating Agent may be merged or converted
or with which it may be consolidated, or any Person resulting from any merger,
conversion or consolidation to which such Authenticating Agent shall be a party,
or any Person succeeding to all or substantially all of the corporate agency or
corporate trust business of an Authenticating Agent (including the
authenticating agency contemplated by this Indenture), shall continue to be an
Authenticating Agent, PROVIDED such Person shall be otherwise eligible under
this Section, without the execution or filing of any paper or any further act on
the part of the Trustee or the Authenticating Agent.

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

      Any Authenticating Agent by the acceptance of its appointment shall be
deemed to have represented to the Trustee that it is eligible for appointment as
Authenticating Agent under this Section and to have agreed with the Trustee
that: it will perform and carry out the duties of an Authenticating Agent as
herein set forth, including among other things the duties to authenticate
Securities when presented to it in connection with exchanges, registrations of
transfer or redemptions or conversions thereof, but not upon original issuances
or pursuant to Section 306; it will keep and maintain, and furnish to the



                                       52
<PAGE>




Trustee from time to time as requested by the Trustee, appropriate records of
all transactions carried out by it as Authenticating Agent and will furnish the
Trustee such other information and reports as the Trustee may reasonably
require; and it will notify the Trustee promptly if it shall cease to be
eligible to act as Authenticating Agent in accordance with the provisions of
this Section. Any Authenticating Agent by the acceptance of its appointment
shall be deemed to have agreed with the Trustee to indemnify the Trustee against
any loss, liability or expense incurred by the Trustee and to defend any claim
asserted against the Trustee by reason of any acts or failures to act of such
Authenticating Agent, but such Authenticating Agent shall have no liability for
any action taken by it in accordance with the specific written direction of the
Trustee.

      The Trustee shall not be liable for any act or any failure of the
Authenticating Agent to perform any duty either required herein or authorized
herein to be performed by such Person in accordance with this Indenture.

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

      If an appointment is made pursuant to this Section, the Securities may
have endorsed thereon, in addition to the Trustee's certificate of
authentication, an alternative certificate of authentication in the following
form:

      This is one of the Securities described in the within-mentioned Indenture.


                              BANKERS TRUST COMPANY, As Trustee


                              By_____________________________________
                                    As Authenticating Agent

                              By_____________________________________
                                    Authorized Officer


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

SECTION 701.   COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF HOLDERS.

      The Company will furnish or cause to be furnished to the Trustee (a)
semi-annually, not more than 15 days after each Regular Record Date, a list, in
such form as the Trustee may reasonably require, of the names and addresses of
the Holders as of such Regular Record Date, and (b) at such other times as the



                                       53
<PAGE>




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.

      Notwithstanding the foregoing, so long as the Trustee is the Security
Registrar, no such list shall be required to be furnished.

SECTION 702.   PRESERVATION OF INFORMATION; COMMUNICATION TO HOLDERS.

      (a) 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.

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

      (c) Every Holder of Securities, by receiving and holding the same, agrees
with the Company and the Trustee that neither the Company nor the Trustee nor
any agent of either of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders made pursuant to
the Trust Indenture Act or otherwise in accordance with this Indenture.

SECTION 703.   INTENTIONALLY LEFT BLANK.

SECTION 704.   REPORTS BY COMPANY.

      The Company shall file with the Trustee and the Commission, and transmit
to Holders, such information, documents and other reports, and such summaries
thereof, as may be required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to such Act; provided, that any such
information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Exchange Act shall be filed with the
Trustee within 15 days after the same is so required to be filed with the
Commission.

SECTION 705.   INTENTIONALLY LEFT BLANK.







                                       54
<PAGE>




                                  ARTICLE EIGHT

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 801.   COMPANY MAY CONSOLIDATE, ETC., ONLY ON CERTAIN TERMS.

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

      (1) in case the Company shall consolidate with or merge into another
Person or convey, transfer or lease all or substantially all of its properties
and assets to any Person, the Person formed by such consolidation or into which
the Company is merged or the Person which acquires by conveyance or transfer, or
which leases, all or substantially all of the properties and assets of the
Company shall be a corporation, partnership or trust, shall be organized and
validly existing under the laws of the United States of America, any State
thereof or the District of Columbia or the federal laws of Canada or any
province thereof and shall expressly assume, by an indenture supplemental
hereto, executed and delivered to the Trustee, in form satisfactory to the
Trustee, the due and punctual payment of the principal of and premium and
Additional Amounts, if any, and interest on all the Securities and the
performance or observance of every covenant of this Indenture on the part of the
Company to be performed or observed and shall have provided for conversion
rights in accordance with Section 1311;

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

      (3) such consolidation, merger, conveyance, transfer or lease does not
adversely affect the validity or enforceability of the Securities;

      (4) the interest, principal, premium, if any, and other amounts paid or
credited in respect of the Securities will not be subject to Canadian Tax as a
result of such consolidation, merger, conveyance, transfer or lease; and

      (5) the Company or the successor Person has delivered to the Trustee an
Officers' Certificate and an Opinion of Counsel, each stating that such
consolidation, merger, conveyance, transfer or lease and, if a supplemental
indenture is required in connection with such transaction, 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 SUBSTITUTED.

      Upon any consolidation of the Company with, or merger of the Company into,
any other Person or any conveyance, transfer or lease of all or substantially
all of the properties and assets of the Company in accordance with Section 801,



                                       55
<PAGE>




the successor Person formed by such consolidation or into which the Company is
merged or to which such conveyance, transfer or lease is made shall succeed to,
and be substituted for, and may exercise every right and power of, the Company
under this Indenture with the same effect as if such successor Person had been
named as the Company herein, and thereafter, except in the case of a transfer by
lease, the predecessor Person shall be relieved of all obligations and covenants
under this Indenture and the Securities.


                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

SECTION 901.   SUPPLEMENTAL INDENTURES WITHOUT CONSENT OF HOLDERS.

      Without the consent of any Holders, the Company, when authorized by a
Board Resolution and the provisions hereunder, 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:

      (l)   to cause this Indenture to be qualified under the Trust Indenture
Act; or

      (2) to evidence the succession of another Person to the Company and the
assumption by any such successor of the covenants of the Company herein and in
the Securities and the Security and Pledge Agreement; or

      (3) to add to the covenants of the Company for the benefit of the Holders,
or to surrender any right or power conferred herein or in the Securities and the
Security and Pledge Agreement upon the Company; or

      (4) to add any additional Events of Default, provided that the addition of
such Events of Default does not result in any interest on the Securities being
subject to Canadian Tax; or

      (5) to permit or facilitate the issuance of Securities in uncertificated
form; or

      (6)   to further secure the Securities; or

      (7) to make provision with respect to the conversion rights of Holders
pursuant to the requirements of Section 1311 or the repurchase rights of Holders
pursuant to Section 1407; or

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

      (9) to cure any ambiguity, to correct or supplement any provision herein
or in the Securities or the Security and Pledge Agreement which may be defective
or inconsistent with any other provision herein or in the Securities or the
Security and Pledge Agreement, or to make any other provisions with respect to
matters or questions arising under this Indenture which shall not be



                                       56
<PAGE>




inconsistent with the provisions of this Indenture; provided, that such action
pursuant to this Clause (9) shall not adversely affect the interests of the
Holders in any material respect and the Trustee may rely upon an Opinion of
Counsel to that effect.

SECTION 902.   SUPPLEMENTAL INDENTURES WITH CONSENT OF HOLDERS.

      With the consent of the Holders of not less than a majority in principal
amount of the Outstanding Securities, by Act of said Holders delivered to the
Company and the Trustee, the Company, when authorized by a Board Resolution, and
the Trustee may enter into an indenture or indentures supplemental hereto or any
amendment to the Security and Pledge Agreement for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or the Security and Pledge Agreement or of modifying in any
manner the rights of the Holders under this Indenture or the Security and Pledge
Agreement or change the obligation of the Company to pay Additional Amounts;
provided, however, that no such supplemental indenture or amendment shall,
without the consent of the Holder of each Outstanding Security affected thereby,

      (1) change the Stated Maturity of the principal of, or any installment of
interest on, any Security, or reduce the principal amount thereof or the rate of
interest thereon or any premium payable upon the redemption thereof, or change
the obligation of the Company to pay Additional Amounts or change the place of
payment where, or the coin or currency in which, any Security or any premium or
Additional Amounts or interest thereon is payable, or impair the right to
institute suit for the enforcement of any such payment on or after the Stated
Maturity thereof (or, in the case of redemption, on or after the Redemption
Date), or adversely affect the right to convert any Security as provided in
Article Thirteen (except as permitted by Section 901(7)), or modify the
provisions of Article Fourteen (except as provided by Section 901(7)), or the
provisions of this Indenture with respect to the subordination of the
Securities, in a manner adverse to the Holders, or

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

      (3) modify any of the provisions of this Section, Section 513 or Section
1009, 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; PROVIDED, HOWEVER,
that this Clause shall not be deemed to require the consent of any Holder with
respect to changes in the references to "the Trustee" and concomitant changes in
this Section, or the deletion of this proviso, in accordance with the
requirements of Section 901(8).

      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.




                                       57
<PAGE>




SECTION 903.   EXECUTION OF SUPPLEMENTAL INDENTURES.

      In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 601) shall be fully protected in relying upon, an
Officers' Certificate and an Opinion of Counsel stating that the execution of
such supplemental indenture is authorized or permitted by this Indenture. The
Trustee may, but shall not be obligated to, enter into any such supplemental
indenture which adversely 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
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.

SECTION 906.   REFERENCE IN SECURITIES TO SUPPLEMENTAL INDENTURES.

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

SECTION 907.   NOTICE OF SUPPLEMENTAL INDENTURE.

      Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to this Article, the Company shall transmit to
the Holders a notice setting forth the substance of such supplemental indenture.




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<PAGE>




                                   ARTICLE TEN

                                    COVENANTS

SECTION 1001.  PAYMENT OF PRINCIPAL, PREMIUM AND INTEREST.

      The Company will duly and punctually pay the principal of and premium and
Additional Amounts, if any, and interest on the Securities in accordance with
the terms of the Securities and this Indenture.

SECTION 1002.  MAINTENANCE OF OFFICE OR AGENCY.

      The Company will maintain in New York, New York an office or agency where
Securities may be presented or surrendered for payment, where Securities may be
surrendered for registration of transfer, where Securities may be surrendered
for exchange or conversion and where notices and demands to or upon the Company
in respect of the Securities and this Indenture may be served, which office or
agency shall initially be located at Four Albany Street, New York, New York
10006. The Company will give prompt written notice to the Trustee of the
location, and any change in the location, of any 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, and the Company hereby appoints the Trustee as its agent
to receive all such presentations, surrenders, notices and demands.

      The Company may also from time to time designate one or more other offices
or agencies where the Securities may be presented or surrendered for any or all
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 New York, New York
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.

SECTION 1003.  MONEY FOR SECURITY PAYMENTS TO BE HELD IN TRUST.

      If the Company shall at any time act as its own Paying Agent, it will, on
or before each due date of the principal of and premium, if any, or interest on
any of the Securities, segregate and hold in trust for the benefit of the
Persons entitled thereto a sum sufficient to pay the principal and premium, if
any, or interest 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, it will, on or
prior to 10:00 a.m. (New York City time) on each due date of the principal of,
and premium and Additional Amounts, if any, or interest on any Securities,
deposit with a Paying Agent a sum in same day funds sufficient to pay the
principal and any premium and Additional Amounts and interest so becoming due,



                                       59
<PAGE>




such sum to be held as provided by the Trust Indenture Act, and (unless such
Paying Agent is the Trustee) the Company will promptly notify the Trustee of its
action or failure so to act.

      The Company will cause each Paying Agent other than the Trustee or the
Company to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee, subject to the provisions of this Section,
that such Paying Agent will (i) comply with the provisions of the Trust
Indenture Act and this indenture applicable to it as a Paying Agent and hold all
sums held by it for the payment of principal of, or any premium or interest on,
the Securities in trust for the benefit of the Persons entitled thereto until
such sums shall be paid to such Persons or otherwise disposed of as herein
provided; (ii) give the Trustee written notice of any default by the Company (or
any other obligor upon the Securities) in the making of any payment in respect
of the Securities; and (iii) at any time during the continuance of any Event of
Default by the Company (or any other obligor upon the Securities) in the making
of any payment in respect of the Securities, upon the written request of the
Trustee, forthwith pay to the Trustee all sums held in trust by such Paying
Agent for payment in respect of the Securities, and account for any funds
disbursed.

      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
money.

      The Trustee shall not be liable for any act or failure to act of any
Paying Agent (other than the Trustee acting in such capacity) to perform any
duty either required herein or authorized herein to be performed by such person
in accordance with this Indenture.

      Any money deposited with the Trustee or any Paying Agent, or then held by
the Company, in trust for the payment of the principal of and premium and
Additional Amounts, if any, or interest on any Security and remaining unclaimed
for two years after such principal and premium and Additional Amounts, if any,
or interest has become due and payable shall be paid to the Company on Company
Request, or (if then held by the Company) shall be discharged from such trust;
and the Holder of such Security shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Company cause to be published once, in a
newspaper published in the English language, customarily published on each
Business Day and of general circulation in New York, New York, 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.




                                       60
<PAGE>




SECTION 1004.  STATEMENT BY OFFICERS AS TO DEFAULT.

      The Company will deliver to the Trustee, within 120 days after the end of
each fiscal year of the Company ending after the date hereof, an Officers'
Certificate stating whether or not to the best knowledge of the signers thereof
the Company is in default in the performance and observance of any of the terms,
provisions and conditions of this Indenture (without regard to any period of
grace or requirement of notice provided hereunder) and, if the Company shall be
in default, specifying all such defaults and the nature and status thereof of
which they may have knowledge.

      The Company will deliver to the Trustee, forthwith upon becoming aware of
any default in the performance or observance of any covenant, agreement or
condition contained in this Indenture, or any Event of Default, an Officers'
Certificate specifying with particularity such default or Event of Default and
further stating what action the Company has taken, is taking or proposes to take
with respect thereto.

      Any notice required to be given under this Section 1004 shall be delivered
to the Trustee at its Corporate Trust Office.

SECTION 1005.  EXISTENCE.

      Subject to Article Eight, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect the Company's
existence, rights (charter and statutory) and franchises and the existence,
rights (charter and statutory) and franchises of each Subsidiary; provided,
however, that the Company shall not be required to preserve any such right or
franchise if the Board of Directors shall determine that the preservation
thereof is no longer desirable in the conduct of the business of the Company and
that the loss thereof is not disadvantageous in any material respect to the
Holders.

SECTION 1006.  MAINTENANCE OF PROPERTIES.

      The Company will cause all properties used or useful in the conduct of its
business or the business of any Subsidiary to be maintained and kept in good
condition, repair and working order and supplied with all necessary equipment
and will cause to be made all necessary repairs, renewals, replacements,
betterments and improvements thereof, all as in the judgment of the Company may
be necessary so that the business carried on in connection therewith may be
properly and advantageously conducted at all times; provided, HOWEVER that
nothing in this Section shall prevent the Company from discontinuing the
operation or maintenance of any of such properties if such discontinuance is, in
the judgment of the Company, desirable in the conduct of its business or the
business of any Subsidiary and not disadvantageous in any material respect to
the Holders.

SECTION 1007.  PAYMENT OF TAXES AND OTHER CLAIMS.

      The Company will pay or discharge, or cause to be paid or discharged,
before the same may become delinquent, (i) all taxes, assessments and
governmental charges levied or imposed upon the Company or any Subsidiary or
upon the income, profits or property of the Company or any Subsidiary, (ii) all



                                       61
<PAGE>




claims for labor, materials and supplies which, if unpaid, might by law become a
lien or charge upon the property of the Company or any Subsidiary, and (iii) all
stamps and other duties, if any, which may be imposed by the United States or
any political subdivision thereof or therein in connection with the issuance,
transfer, exchange or conversion of any Securities or with respect to this
Indenture; provided however that, in the case of clauses (i) and (ii), the
Company shall not be required to pay or discharge or cause to be paid or
discharged any such tax, assessment, charge or claim (A) if the failure to do so
will not, in the aggregate, have a material adverse impact on the Company, or
(B) if the amount, applicability or validity is being contested in good faith by
appropriate proceedings.

SECTION 1008.  RESALE OF CERTAIN SECURITIES.

      During the period beginning on the date of original issuance of the
Securities and ending on the date that is two years from such date (or such
shorter period under Rule 144(k) under the Securities Act or any successor
rule), the Company will not, and will use reasonable efforts not to permit any
of its Subsidiaries or other "affiliates" (as defined under Rule 144 under the
Securities Act or any successor provision thereto) controlled by the Company to,
resell (i) any Securities which constitute "restricted securities" under Rule
144 or (ii) any securities into which the Securities have been converted under
this Indenture which constitute "restricted securities" under Rule 144, that in
either case have been reacquired by any of them. The Trustee shall have no
responsibility in respect of the Company's performance of its agreement in the
preceding sentence.

SECTION 1009.  WAIVER OF CERTAIN COVENANTS.

      The Company may omit in any particular instance to comply with any
covenant or condition set forth in Section 1005, 1006 and 1007, if before the
time for such compliance the Holders of at least a majority in principal amount
of the Outstanding Securities shall, by Act of such Holders, either waive such
compliance in such instance or generally waive compliance with such covenant or
condition, but no such waiver shall extend to or affect such covenant or
condition except to the extent so expressly waived, and, until such waiver shall
become effective, the obligations of the Company and the duties of the Trustee
in respect of any such covenant or condition shall remain in full force and
effect.

SECTION 1010.  ADDITIONAL AMOUNTS.

      The Company will pay to the Holder of any Security Additional Amounts as
provided in the form of Security set forth in Section 202. Whenever in this
Indenture there is mentioned, in any context, the payment of the principal of,
premium, if any, or interest on, or in respect of, any Security, such mention
shall be deemed to include mention of the payment of Additional Amounts provided
for in this Section to the extent that, in such context, Additional Amounts are,
were or would be payable in respect thereof pursuant to the provisions of this
Section and express mention of the payment of Additional Amounts in any
provisions hereof shall not be construed as excluding Additional Amounts in
those provisions hereof where such express mention is not made.




                                       62
<PAGE>




      At least 30 days prior to each date on which any payment under or with
respect to the Securities is due and payable, if the Company will be obligated
to pay Additional Amounts with respect to such payment, the Company will deliver
to the Trustee and the Paying Agent an Officers' Certificate stating the fact
that such Additional Amounts will be payable and setting forth the amounts so
payable and other information necessary to enable the Trustee and the Paying
Agent to pay such Additional Amounts to the Holders or owners of a beneficial
interest in the Securities, as the case may be, on the payment date. The Company
covenants to indemnify the Trustee and any Paying Agent for, and to hold them
harmless against, any loss, liability or expense 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, except to the extent such loss,
liability or expense is attributable to the Trustee's or such Paying Agent's
gross negligence or bad faith.

                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

SECTION 1101.  RIGHT OF REDEMPTION.

      The Securities may be redeemed at the election of the Company, in whole or
from time to time in part, at any time on or after November 13, 1999, at the
Redemption Price specified in the form of Security hereinbefore set forth,
together with accrued and unpaid interest to, but excluding, the Redemption
Date.

SECTION 1102.  APPLICABILITY OF ARTICLE.

      Redemption of Securities at the election of the Company as permitted by
any provision of this Indenture shall be made in accordance with such provision
and this Article.

SECTION 1103.  ELECTION TO REDEEM; NOTICE TO TRUSTEE.

      The election of the Company to redeem any Securities pursuant to Section
1101 shall be evidenced by a Board Resolution. In case of any redemption at the
election of the Company of less than all the Securities, the Company shall, at
least 45 days prior to the Redemption Date fixed by the Company (unless a
shorter period shall be satisfactory to the Trustee), notify the Trustee in
writing of such Redemption Date and of the principal amount of Securities to be
redeemed. In case of any redemption at the election of the Company of all of the
Securities, the Company shall, at least 45 days prior to the Redemption Date
fixed by the Company (unless a shorter period shall be satisfactory to the
Trustee), notify the Trustee in writing of such Redemption Date.

SECTION 1104.  SELECTION BY TRUSTEE OF SECURITIES TO BE REDEEMED.

      If less than all the Securities are to be redeemed (other than as provided
in Section 202 regarding redemption in connection with a Tax Law Change), the
particular Securities to be redeemed shall be selected not more than 60 days


                                       63
<PAGE>




prior to the Redemption Date by the Trustee, from the Outstanding Securities not
previously called for redemption, by any method deemed fair and appropriate by
the Trustee.

      If any Security selected for partial redemption is converted in part
before termination of the conversion right with respect to the portion of the
Security so selected, the converted portion of such Security shall be deemed (so
far as may be) to be the portion selected for redemption. Securities which have
been converted during a selection of Securities to be redeemed shall be treated
by the Trustee as Outstanding for the purpose of such selection. In any case
where more than one Security is registered in the same name, the Trustee in its
discretion may treat the aggregate principal amount so registered as if it were
represented by one Security.

      The Trustee shall promptly notify the Company and each Security Registrar
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 Securities redeemed or to be redeemed only in part, to the portion
of the principal amount of such Securities which has been or is to be redeemed.

SECTION 1105.  NOTICE OF REDEMPTION.

      Notice of redemption shall be given as provided in Sections 105 and 106
not less than 30 nor more than 60 days prior to the Redemption Date, to the
Trustee and to each Holder of Securities to be redeemed, at his address
appearing in the Security Register.

      All notices of redemption shall state:

      (a)   the Redemption Date,

      (b)   the Redemption Price,

      (c) if less than all the Outstanding Securities are to be redeemed, the
identification (and, in the case of partial redemption of any Securities, the
principal amounts) of the particular Securities to be redeemed,

      (d) that on the Redemption Date the Redemption Price will become due and
payable upon each such Security to be redeemed and that (unless the Company
shall default in payment of the Redemption Price) interest thereon will cease to
accrue on and after said date,

      (e) the conversion price, the date on which the right to convert the
Securities to be redeemed will terminate (which right shall extend at least
until one business day prior to the Redemption Date) and the place or places
where such Securities may be surrendered for conversion, and

      (f) the place or places where such Securities are to be surrendered for
payment of the Redemption Price.



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      Notice of redemption of Securities to be redeemed at the election of the
Company shall be given by the Company or, at the Company's request received by
the Trustee at least 30 days prior to the Redemption Date, by the Trustee in the
name and at the expense of the Company.

SECTION 1106.  DEPOSIT OF REDEMPTION PRICE.

      On or prior to 10:00 a.m. (New York City time) on 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, segregate and hold in trust as
provided in Section 1003) an amount of money in same day funds sufficient to pay
the Redemption Price of, and accrued and unpaid interest on, all the Securities
or portions thereof which are to be redeemed on that date other than any
Securities called for redemption on that date which have been converted prior to
the date of such deposit.

      If any Security called for redemption is converted, any money deposited
with the Trustee or with any Paying Agent or so segregated and held in trust for
the redemption of such Security shall (subject to any right of the Holder of
such Security or any Predecessor Security to receive interest as provided in the
last paragraph of Section 307) be paid to the Company upon Company Request or,
if then held by the Company, shall be discharged from such trust.

SECTION 1107.  SECURITIES PAYABLE ON REDEMPTION DATE.

      Notice of redemption having been given as aforesaid, the Securities so to
be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price, any Additional
Amounts and accrued interest) such Securities shall cease to bear interest. Upon
surrender of any such Security for redemption in accordance with said notice,
such Security shall be paid by the Company at the Redemption Price and any
Additional Amounts, together with accrued and unpaid interest to, but excluding,
the Redemption Date; provided, however, that installments of interest whose
Maturity is on or prior to 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 Security called for redemption shall not be so paid upon surrender
thereof for redemption, the principal and premium, if any, shall, until paid,
bear interest from the Redemption Date at the rate borne by the Security.

SECTION 1108.  SECURITIES REDEEMED IN PART.

      Any Security which is to be redeemed only in part shall be surrendered at
an office or agency of the Company maintained for that purpose pursuant to
Section 1002 (with, if the Company or the Securities Registrar so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the
Company and the Securities Registrar 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




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service charge, a new Security or Securities, 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.



                                 ARTICLE TWELVE

                           SUBORDINATION OF SECURITIES

SECTION 1201.  SECURITIES SUBORDINATED TO SENIOR INDEBTEDNESS.

      The Company covenants and agrees, and each Holder of a Security, by his
acceptance thereof, likewise covenants and agrees, that, at all times and in all
respects, the indebtedness represented by the Securities and the payment of the
principal of and premium, if any, and interest on each and all of the Securities
are hereby expressly made subordinate and subject in right of payment to the
prior payment in full of all Senior Indebtedness, except with respect to the
Collateral as contemplated by the Security and Pledge Agreement. "Senior
Indebtedness" means (i) the principal, premium, if any, and interest in respect
of (A) indebtedness of the Company for money borrowed and (B) indebtedness
evidenced by securities, debentures, bonds or other similar instruments issued
by the Company, (ii) all capital lease obligations of the Company, (iii) all
obligations of the Company issued or assumed as the deferred purchase price of
property, all conditional sale obligations of the Company and all obligations of
the Company under any title retention agreement (but excluding trade obligations
of the Company under any title retention agreement (but excluding trade accounts
payable arising in the ordinary course of business), (iv) all obligations of the
Company for the reimbursement on any letter of credit, bankers acceptance,
security purchase facility or similar credit transaction, (v) all obligations of
the type referred to in clauses (i) through (iv) above of other persons for the
payment of which the Company is responsible or liable as obligor, guarantor or
otherwise, and (vi) all obligations of the type referred to in clauses (i)
through (v) above of other persons secured by any lien on any property or assets
of the Company (whether or not such obligation is assumed by the Company),
except for any such indebtedness or other obligation that is by its terms
subordinated to or PARI PASSU with the Securities.

SECTION 1202.  PAYMENT OVER OF PROCEEDS UPON DISSOLUTION. ETC.

      In the event of (a) any insolvency or bankruptcy case or proceeding, or
any receivership, liquidation, reorganization or other similar case or
proceeding, relative to the Company or to its creditors, as such, or to a
substantial part of its assets, or (b) any proceeding for the liquidation,
dissolution or other winding up of the Company, whether voluntary or involuntary
and whether or not involving insolvency or bankruptcy, or (c) any general
assignment for the benefits of creditors or any other marshaling of assets and
liabilities of the Company, then and in any such event the holders of Senior
Indebtedness shall be entitled to receive payment in full of all amounts due or
to become due on or in respect of all Senior Indebtedness; or provision shall be
made for such payment in money or money's worth, before the Holders of the
Securities are entitled to receive any payment or distribution of any kind or
character, whether in cash, property or securities, on account of principal of
or premium and Additional Amounts, if any, or interest on the Securities, other
than with respect to the Collateral, and to that end the holders of Senior


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Indebtedness shall be entitled to receive, for application to the payment
thereof, any payment or distribution of any kind or character, whether in cash,
property or securities, including any such payment or distribution which may be
payable or deliverable by reason of the payment of any other indebtedness of the
Company being subordinated to the payment of the Securities, which may be
payable or deliverable in respect of the Securities in any such case, proceeding
dissolution, liquidation or other winding up or event other than with respect to
the Collateral.

      In the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment or distribution of assets of the Company of any kind or character,
whether in cash, property or securities, including any such payment or
distribution which may be payable or deliverable by reason of the payment of any
other indebtedness of the Company being subordinated to the payment of the
Securities, other than with respect to the Collateral, before all Senior
Indebtedness is paid in full or payment thereof provided for, and if such fact
shall, at or prior to the time of such payment or distribution, have been made
known to the Trustee or such Holder, as the case may be, then and in such event
such payment or distribution shall be paid over or delivered forthwith to the
trustee in bankruptcy, receiver, liquidating trustee, custodian, assignee, agent
or other Person making payment or distribution of assets of the Company for
application to the payment of all Senior Indebtedness remaining unpaid, to the
extent necessary to pay all Senior Indebtedness in full, after giving effect to
any concurrent payment or distribution to or for the holders of Senior
Indebtedness.

      For purposes of this Article only, the words "cash, property or
securities" shall not be deemed to include securities of the Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan of reorganization or readjustment, which are subordinated
in right of payment to all Senior Indebtedness which may at the time be
outstanding to substantially the same extent as, or to a greater extent than,
the Securities are so subordinated as provided in this Article. The
consolidation of the Company with, or the merger of the Company into, another
Person or the liquidation or dissolution of the Company following the conveyance
or transfer of its properties and assets substantially as an entirety to another
Person upon the terms and conditions set forth in Article Eight shall not be
deemed a dissolution, winding up, liquidation, reorganization, general
assignment for the benefit of creditors or marshaling of assets and liabilities
of the Company for the purposes of this Section if the Person formed by such
consolidation or into which the Company is merged or which acquires by
conveyance or transfer such properties and assets substantially as an entirety,
as the case may be, shall, as a part of such consolidation, merger, conveyance
or transfer, comply with the conditions set forth in Article Eight.

SECTION 1203.  PRIOR PAYMENT TO SENIOR INDEBTEDNESS UPON ACCELERATION OF
SECURITIES.

      In the event that any Securities are declared due and payable before their
Stated Maturity, then and in such event the holders of Senior Indebtedness
outstanding at the time such Securities so become due and payable shall be
entitled to receive payment in full of all amounts due on or in respect of such
Senior Indebtedness, or provision shall be made for such payment in money or


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<PAGE>




money's worth, before the Holders of the Securities are entitled to receive any
payment (including any payment which may be payable by reason of the payment of
any other indebtedness of the Company being subordinated to the payment of the
Securities) by the Company on account of the principal of or premium and
Additional Amounts, if any, or interest on the Securities or on account of
purchase or other acquisition of Securities, other than with respect to the
Collateral.

      In the event that, notwithstanding the foregoing, the Company shall make
any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section, and if such fact shall, at or prior to the
time of such payment, have been made known to the Trustee or such Holder, as the
case may be, then and in such event such payment shall be paid over and
delivered forthwith to the Company.

      The provisions of this Section shall not apply to any payment with respect
to which Section 1202 would be applicable.

SECTION 1204.  INTENTIONALLY LEFT BLANK.

SECTION 1205.  PAYMENT PERMITTED IF NO DEFAULT.

      Nothing contained in this Article or elsewhere in this Indenture or in any
of the Securities shall prevent (a) the Company, at any time except during the
pendency of any case, proceeding, dissolution, liquidation or other winding up,
general assignment for the benefit of creditors or other marshaling of assets
and liabilities of the Company referred to in Section 1202 or under the
conditions described in Section 1203 or 1204, from making payments at any time
of principal of and premium and Additional Amounts, if any, or interest on the
Securities, or (b) the application by the Trustee of any money deposited with it
hereunder to the payment of or on account of the principal of and premium, if
any, or interest on the Securities or the retention of such payment by the
Holders, if, at the time of such application by the Trustee, in its capacity as
such, it did not have knowledge that such payment would have been prohibited by
the provisions of this Article.

SECTION 1206.  SUBROGATION TO RIGHTS OF HOLDERS OF SENIOR INDEBTEDNESS.

      Subject to the payment in full of all amounts due on or in respect of
Senior Indebtedness, the Holders of the Securities shall be subrogated to the
extent of the payments or distributions made to the holders of such Senior
Indebtedness pursuant to the provisions of this Article (equally and ratably
with the holders of all indebtedness of the Company which by its express terms
is subordinated to other indebtedness of the Company to substantially the same
extent as the Securities are subordinated and is entitled to like rights of
subrogation) to the rights of the holders of such Senior Indebtedness to receive
payments and distributions of cash, property and securities applicable to the
Senior Indebtedness until the principal of and premium, if any, and Interest on
the Securities shall be paid in full. For purposes of such subrogation, no
payments or distributions to the holders of the Senior Indebtedness of any cash,
property or securities to which the Holders of the Securities or the Trustee


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would otherwise be entitled except for the provisions of this Article, and no
payments over pursuant to the provisions of this Article to the holders of
Senior Indebtedness by Holders of the Securities or the Trustee, shall, as among
the Company, its creditors other than holders of Senior Indebtedness and the
Holders of the Securities, be deemed to be a payment or distribution by the
Company to or on account of the Senior Indebtedness.

SECTION 1207.  PROVISIONS SOLELY TO DEFINE RELATIVE RIGHTS.

      The provisions of this Article are and are intended solely for the purpose
of defining the relative rights of the Holders of the Securities on the one hand
and the holders of Senior Indebtedness on the other hand. Nothing contained in
this Article or elsewhere in this Indenture or in the Securities is intended to
or shall (a) impair, as among the Company, its creditors other than holders of
Senior Indebtedness and the Holders of the Securities, the obligation of the
Company, which is absolute and unconditional, to pay to the Holders of the
Securities the principal of and premium and Additional Amounts, if any, and
interest on the Securities as and when the same shall become due and payable in
accordance with their terms; or (b) affect the relative rights against the
Company of the Holders of the Securities and creditors of the Company other than
the holders of Senior Indebtedness; or (c) prevent the Trustee or the Holder of
any Security from exercising all remedies otherwise permitted by applicable law
upon default under this Indenture, subject to the rights, if any, under this
Article of the holders of Senior Indebtedness to receive cash, property and
securities otherwise payable or deliverable to the Trustee or such Holder.

SECTION 1208.  TRUSTEE TO EFFECTUATE SUBORDINATION.

      Each holder of a Security by his acceptance thereof authorizes and directs
the Trustee on his behalf to take such action as may be necessary or appropriate
to effectuate the subordination provided in this Article and appoints the
Trustee his attorney-in-fact for any and all such purposes.

SECTION 1209.  NO WAIVER OF SUBORDINATION PROVISIONS.

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

      Without in any way limiting the generality of the foregoing paragraph, the
holders of Senior Indebtedness may, at any time and from time to time, without
the consent of or notice to the Trustee or the Holders of the Securities,
without incurring responsibility to the Holders of the Securities and without
impairing or releasing the subordination provided in this Article or the
obligations hereunder of the Holders of the Securities to the holders of Senior
Indebtedness, do any one or more of the following: (i) change the manner, place
or terms of payment or extend the time of payment of, or renew or alter, Senior
Indebtedness, or otherwise amend or supplement in any manner Senior Indebtedness


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<PAGE>




or any instrument evidencing the same or any agreement under which Senior
Indebtedness is outstanding; (ii) sell, exchange, release or otherwise deal with
any property pledged, mortgaged or otherwise securing Senior Indebtedness; (iii)
release any Person liable in any manner for the collection of Senior
Indebtedness; and (iv) exercise or refrain from exercising any rights against
the Company and any other Person.

SECTION 1210.  NOTICE TO TRUSTEE.

      The Company shall give prompt written notice to the Trustee of any fact
known to the Company which would prohibit the making of any payment to or by the
Trustee in respect of the Securities. Notwithstanding the provisions of this
Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until a Responsible Officer of the Trustee shall have received written
notice thereof from the Company or a holder of Senior Indebtedness or from any
trustee therefor; and, prior to the receipt of any such written notice, the
Trustee, subject to the provisions of Section 601, shall be entitled in all
respects to assume that no such facts exist; provided, however, that if the
Trustee shall not have received the notice directing that a payment or
distribution not be made provided for in this Section and Section 1204 at least
two Business Days prior to the date upon which by the terms hereof any money may
become payable for any purpose (including, without limitation, the payment of
the principal of and premium, if any, or interest on any Security), then,
anything herein contained to the contrary notwithstanding, the Trustee shall
have full power and authority to receive such money and to apply the same to the
purpose for which such money was received and shall not be affected by any
notice to the contrary which may be received by it within two Business Days
prior to such date.

      Subject to the provisions of Section 601, the Trustee shall be entitled to
rely on the delivery to it of a written notice by a Person representing himself
to be a holder of Senior Indebtedness (or a trustee or representative therefor)
to establish that such notice has been given by a holder of Senior Indebtedness
(or a trustee or representative therefor). In the event that the Trustee
determines in good faith that further evidence is required with respect to the
right of any Person as a holder of Senior Indebtedness to participate in any
payment or distribution pursuant to this Article, the Trustee may request such
Person to furnish evidence to the reasonable satisfaction of the Trustee as to
the amount of Senior Indebtedness held by such Person, the extent to which such
Person is entitled to participate in such payment or distribution and any other
facts pertinent to the rights of such Person under this Article, and if such
evidence is not furnished, the Trustee may defer any payment to such Person
pending judicial determination as to the right of such Person to receive such
payment.

SECTION 1211.  RELIANCE ON JUDICIAL ORDER OR CERTIFICATE OF LIQUIDATING
AGENT.

      Upon any payment or distribution of assets of the Company referred to in
this Article, the Trustee, subject to the provisions of Section 601, and the
Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit


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<PAGE>




of creditors, agent or other person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article.

SECTION 1212.  TRUSTEE NOT FIDUCIARY FOR HOLDERS OF SENIOR INDEBTEDNESS.

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

SECTION 1213.  RIGHTS OF TRUSTEE AS HOLDER OF SENIOR INDEBTEDNESS;
PRESERVATION OF TRUSTEE'S RIGHTS.

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

      Nothing in this Article shall apply to claims of, or payments to, the
Trustee under or pursuant to Section 607.

SECTION 1214.  ARTICLE APPLICABLE TO PAYING AGENTS.

      In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article shall in such case (unless the context otherwise
requires) be construed as extending to and including such Paying Agent within
its meaning as fully for all intents and purposes as if such Paying Agent were
named in this Article in addition to or in place of the Trustee; provided,
however, that Section 1213 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

SECTION 1215.  CERTAIN CONVERSIONS DEEMED PAYMENT.

      For the purposes of this Article only, (1) the issuance and delivery of
junior securities upon conversion of Securities in accordance with Article
Thirteen shall not be deemed to constitute a payment or distribution on account
of the principal of or premium or interest on Securities or on account of the
purchase or other acquisition of Securities, and (2) the payment, issuance or
delivery of cash (other than for payments of fractional shares pursuant to
Section 1303), property or securities (other than junior securities) upon


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conversion of a Security shall be deemed to constitute payment on account of the
principal of such Security. For the purposes of this Section, the term "junior
securities" means (a) shares of any class of capital stock of the Company and
(b) securities of the Company which are subordinated in right of payment to all
Senior Indebtedness which may be outstanding at the time of issuance or delivery
of such securities to substantially the same extent as, or to a greater extent
than, the Securities are so subordinated as provided in this Article. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities is
intended to or shall impair, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, the right,
which is absolute and unconditional, of the Holder of any Security to convert
such Security in accordance with Article Thirteen.

SECTION 1216.  NO SUSPENSION OF REMEDIES.

      Nothing contained in this Article shall limit the right of the Trustee or
the Holders of the Securities to take any action to accelerate the maturity of
the Securities pursuant to the provisions described under Article Five and as
set forth in this Indenture or to pursue any rights or remedies hereunder, under
the Security and Pledge Agreement or under applicable law, subject to the
rights, if any, under this Article of the holders, from time to time, of Senior
Indebtedness to receive the cash, property or securities receivable upon the
exercise of such rights or remedies.

                                ARTICLE THIRTEEN

                            CONVERSION OF SECURITIES

SECTION 1301.  CONVERSION PRIVILEGE AND CONVERSION PRICE.

      Subject to and upon compliance with the provisions of this Article, at the
option of the Holder thereof, any Security or any portion of the principal
amount thereof which equals $1,000 or any integral multiple thereof may be
converted at any time after the date of original issuance of Securities under
this Indenture at the principal amount thereof, or of such portion thereof, into
fully paid and nonassessable Common Shares (calculated as to each conversion to
the nearest 1/100 of a share), at the conversion price, determined as
hereinafter provided, in effect at the time of conversion. Such conversion right
shall expire at the close of business on November 13, 2003. In case a Security
or portion thereof is called for redemption, such conversion right in respect of
the Security or portion so called shall expire at the close of business on the
Business Day next preceding the applicable Redemption Date, unless the Company
defaults in making the payment due upon redemption. A Security for which a
Holder has delivered a Repurchase Event purchase notice exercising the option of
such holder to require the Company to repurchase such Security pursuant to
Article Fourteen may be converted only if such notice is withdrawn by a written
notice of withdrawal delivered by the Holder to the Company prior to the close
of business on the Business Day immediately preceding the Repurchase Date.

      The price at which shares of Common Stock shall be delivered upon
conversion (herein called the "conversion price") shall be initially $8.5406 per
share. The conversion price shall be adjusted in certain instances as provided
in Section 1304.



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SECTION 1302.  EXERCISE OF CONVERSION PRIVILEGE.

      In order to exercise the conversion privilege, the Holder of any Security
shall surrender such Security, duly endorsed or assigned to the Company or in
blank, at any office or agency of the Company maintained pursuant to Section
1002, accompanied by written notice to the Company in the form provided in the
Security (or such other notice as is acceptable to the Company) at such office
or agency that the Holder elects to convert such Security or, if less than the
entire principal amount thereof is to be converted, the portion thereof to be
converted.

      Securities surrendered for conversion during the period from the close of
business on any Regular Record Date next preceding any Interest Payment Date to
the close of business on the Business Day immediately preceding such Interest
Payment Date shall (unless such Security or portion thereof being converted
shall have been called for redemption during the period from the close of
business on any Regular Record Date next preceding any Interest Payment Date to
the close of business on the Business Day next preceding the following Interest
Payment Date, as described in the succeeding sentence) be accompanied by payment
in funds acceptable to the Company of an amount equal to the interest payable on
such Interest Payment Date on the principal amount being surrendered for
conversion; provided, however, that no such payment need be made if there shall
exist at the time of conversion a default in the payment of interest on the
Security. If such Security or portion thereof being converted shall have been
called for redemption during the period from the close of business on any
Regular Record Date next preceding any Interest Payment Date to the close of
business on the Business Day immediately preceding such Interest Payment Date,
then the Company shall pay interest on such Security or portion thereof up to
but not including the date of conversion. Except as provided above in this
Section 1302 and subject to the second paragraph of Section 203 and the third
paragraph of Section 307, no payment or adjustment shall be made upon any
conversion on account of any interest accrued on the Securities surrendered for
conversion or on account of any dividends on the Common Shares issued upon
conversion.

      Securities shall be deemed to have been converted immediately prior to the
close of business on the day of surrender of such Securities for conversion in
accordance with the foregoing provisions, and at such time the rights of the
Holders of such Securities as Holders shall cease, and the Person or Persons
entitled to receive the Common Shares issuable upon conversion shall be treated
for all purposes of the record holder or holders of such Common Shares as and
after such time. As promptly as practicable on or after the conversion date, the
Company shall issue and shall deliver at such office or agency a certificate or
certificates for the number of full Common Shares issuable upon conversion,
together with payment in lieu of any fraction of a share, as provided in Section
1303.

      In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in aggregate principal amount equal to
the unconverted portion of the principal amount of such Security.



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SECTION 1303.  FRACTIONS OF SHARES.

      No fractional Common Share shall be issued upon conversion of Securities.
If more than one Security shall be surrendered for conversion at one time by the
same Holder, the number of full shares which shall be issuable upon conversion
thereof shall be computed on the basis of the aggregate principal amount of the
Securities (or specified portions thereof) so surrendered. Instead of any
fractional share which would otherwise be issuable upon conversion of any
Security or Securities (or specified portions thereof), the Company shall pay a
cash adjustment in respect of such fraction in an amount equal to the same
fraction of the Closing Price (as hereinafter defined) at the close of business
on the day of conversion (or, if such day is not a Trading Day (as hereafter
defined), on the Trading Day immediately preceding such day).

SECTION 1304.  ADJUSTMENT OF CONVERSION PRICE.

      (a) In case the Company shall pay or make a dividend or other distribution
on the Common Shares exclusively in Common Shares or shall pay or make a
dividend or other distribution on any other class of capital stock of the
Company which dividend or distribution includes Common Shares, the conversion
price in effect at the opening of business on the day following the date fixed
for the determination of stockholders entitled to receive such dividend or other
distribution shall be reduced by multiplying such conversion price by a fraction
of which the numerator shall be the number of Common Shares outstanding at the
close of business on the date fixed for such determination and the denominator
shall be the sum of such number of shares and the total number of shares
constituting such dividend or other distribution, such reduction to become
effective immediately after the opening of business on the day following the
date fixed for such determination. For the purpose of this paragraph (a), the
number of Common Shares at any time outstanding shall not include shares held in
the treasury of the Company. The Company shall not pay any dividend or make any
distribution on Common Shares held in the treasury of the Company.

      (b) Subject to paragraph (g) of this Section, in case the Company shall
pay or make a dividend or other distribution on the Common Shares consisting
exclusively of, or shall otherwise issue to all holders of the Common Shares,
rights or warrants entitling the holders thereof to subscribe for or purchase
shares of Common Shares at a price per share less than the Current Market Price
(determined as provided in paragraph (j) of this Section) on the date fixed for
the determination of stockholders entitled to receive such rights or warrants,
the conversion price in effect at the opening of business on the day following
the date fixed for such determination shall be reduced by multiplying such
conversion price by a fraction of which the numerator shall be the number of
Common Shares outstanding at the close of business on the date fixed for such
determination plus the number of Common Shares which the aggregate of the
offering price of the total number of Common Shares so offered for subscription
or purchase would purchase at such Current Market Price and the denominator
shall be the number of Common Shares outstanding at the close of business on the
date fixed for such determination plus the number of Common Shares so offered
for subscription or purchase, such reduction to become effective immediately
after the opening of business on the day following the date fixed for such
determination. For the purposes of this paragraph (b), the number of Common


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Shares at any time outstanding shall not include shares held in the treasury of
the Company. The Company shall not issue any rights or warrants in respect of
Common Shares held in the treasury of the Company. In determining whether any
rights or warrants entitle the holders to subscribe for or purchase Common
Shares at less than such Current Market Price, and in determining the aggregate
offering price of such Common Shares, there shall be taken into account any
consideration received by the Company for such rights or warrants, the value of
such consideration, if other than cash, to be determined by the Board of
Directors.

      (c) In case outstanding Common Shares shall be subdivided into a greater
number of shares of Common Shares, the conversion price in effect at the opening
of business on the day following the day upon which such subdivision becomes
effective shall be proportionately reduced, and, conversely, in case outstanding
Common Shares shall be combined into a smaller number of Common Shares, the
conversion price in effect at the opening of business on the day following the
day upon which such combination becomes effective shall be proportionately
increased, such reduction or increase, as the case may be, to become effective
immediately after the opening of business on the day following the day upon
which subdivision or combination becomes effective.

      (d) Subject to the last sentence of this paragraph (d) and to paragraph
(g) of this Section, in case the Company shall, by dividend or otherwise,
distribute to all holders of the Common Shares evidences of its indebtedness,
shares of any class of its capital stock, cash or other assets (including
securities, but excluding any rights or warrants referred to in paragraph (b) of
this Section, excluding any dividend or distribution paid exclusively in cash
and excluding any dividend or distribution referred to in paragraph (a) of this
Section), the conversion price shall be reduced by multiplying the conversion
price in effect immediately prior to the close of business on the date fixed for
the determination of stockholders entitled to such distribution by a fraction of
which the numerator shall be the Current Market Price (determined as provided in
paragraph (j) of this Section) on such date less the fair market value (as
determined by the Board of Directors, whose determination shall be conclusive
and described in a Board Resolution) on such date of the portion of the
evidences of indebtedness, shares of capital stock, cash and other assets to be
distributed applicable to one Common Share and the denominator shall be such
Current Market Price, such reduction to become effective immediately prior to
the opening of business on the day following such date. If the Board of
Directors determines the fair market value of any distribution for purposes of
this paragraph (d) by reference to the actual or when-issued trading market for
any securities comprising part or all of such distribution, it must in doing so
consider the prices in such market over the same period used in computing the
Current Market Price pursuant to paragraph (j) of this Section, to the extent
possible. For purposes of this paragraph (d), any dividend or distribution that
includes Common Shares, rights or warrants to subscribe for or purchase Common
Shares or securities convertible into or exchangeable for Common Shares shall be
deemed to be (x) a dividend or distribution of the evidences of indebtedness,
cash, assets or shares of capital stock other than such Common Shares, such
rights or warrants or such convertible or exchangeable securities (making any
conversion price reduction required by this paragraph (d)) immediately followed
by (y) in the case of such Common Shares or such rights or warrants, a dividend
or distribution thereof (making any further conversion price reduction required
by paragraph (a) and (b) of this Section, except any Common Shares included in
such dividend or distribution shall not be deemed "outstanding at the close of
business on the date fixed for such determination" within the meaning of


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paragraph (a) of this Section), or (z) in the case of such convertible or
exchangeable securities, a dividend or distribution of the number of Common
Shares as would then be issuable upon the conversion or exchange thereof,
whether or not the conversion or exchange of such securities is subject to any
conditions (making any further conversion price reduction required by paragraph
(a) of this Section, except the shares deemed to constitute such dividend or
distribution shall not be deemed "outstanding at the close of business on the
date fixed for such determination" within the meaning of paragraph (a) of this
Section).

      (e) In case the Company shall, by dividend or otherwise, at any time
distribute to all holders of the Common Shares cash (excluding any cash that is
distributed as part of a distribution referred to in paragraph (d) of this
Section or in connection with a transaction to which Section 1311 applies) in an
aggregate amount that, together with (A) the aggregate amount of any other
distributions to all holders of the Common Shares made exclusively in cash
within the 12 months preceding the date fixed for the determination of
stockholders entitled to such distribution and in respect of which no conversion
price adjustment pursuant to this paragraph (e) has been made previously and (B)
the aggregate of any cash plus the fair market value (as determined by the Board
of Directors, whose determination shall be conclusive and described in a Board
Resolution) as of such date of determination of consideration payable in respect
of any tender offer by the Company or a Subsidiary for all or any portion of the
Common Shares consummated within the 12 months preceding such date of
determination and in respect of which no conversion price adjustment pursuant to
paragraph (f) of this Section has been made previously, exceeds the greater of
(I) 12.5% of the product of the Current Market Price (determined as provided in
paragraph (j) of this Section) on such date of determination times the number of
Common Shares outstanding on such date or (II) the Company's retained earnings
on the date fixed for determining the stockholders entitled to such
distribution, the conversion price shall be reduced by multiplying the
conversion price in effect immediately prior to the close of business on such
date of determination by a fraction of which the numerator shall be the Current
Market Price (determined as provided in paragraph (j) of this Section) on such
date less the amount of cash to be distributed at such time applicable to one
Common Share and the denominator shall be such Current Market Price, such
reduction to become effective immediately prior to the opening of business on
the day after such date.

      (f) In case a tender offer made by the Company or any Subsidiary for all
or any portion of the Common Shares shall be consummated and such tender offer
shall involve an aggregate consideration having a fair market value (as
determined by the Board of Directors, whose determination shall be conclusive
and described in a Board Resolution) as of the last time (the "Expiration Time")
that tenders may be made pursuant to such tender offer (as it shall have been
amended) that, together with (A) the aggregate of the cash plus the fair market
value (as determined by the Board of Directors, whose determination shall be
conclusive and described in a Board Resolution) as of the Expiration Time of the
other consideration paid in respect of any other tender offer by the Company or
a Subsidiary for all or any portion of the Common Shares consummated within the
12 months preceding the Expiration Time and in respect of which no conversion
price adjustment pursuant to this paragraph (f) has been made previously and (B)


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the aggregate amount of any distributions to all holders of the Common Shares
made exclusively in cash within the 12 months preceding the Expiration Time and
in respect of which no conversion price adjustment pursuant to paragraph (e) of
this Section has been made previously, exceeds the greater of (I) 12.5% of the
product of the Current Market Price (determined as provided in paragraph (j) of
this Section) immediately prior to the Expiration Time times the number of
Common Shares outstanding (including any tendered shares) at the Expiration Time
or (II) the Company's retained earnings as of the Expiration Time, the
conversion price shall be reduced by multiplying the conversion price in effect
immediately prior to the Expiration Time by a fraction of which the numerator
shall be (x) the product of the Current Market Price (determined as provided in
paragraph (j) of this Section) immediately prior to the Expiration Time times
the number of Common Shares outstanding (including any tendered shares at the
Expiration Time minus (y) the fair market value (determined as aforesaid) of the
aggregate consideration payable to stockholders upon consummation of such tender
offer and the denominator shall be the product of (A) such Current Market Price
times (B) such number of outstanding shares at the Expiration Time minus the
number of shares accepted for payment in such tender offer (the "Purchased
Shares"), such reduction to become effective immediately prior to the opening of
business on the day following the Expiration Time; provided, that if the number
of Purchased Shares or the aggregate consideration payable therefor have not
been finally determined by such opening of business, the adjustment required by
this paragraph (f) shall, pending such final determination, be made based upon
the preliminarily announced results of such tender offer, and, after such final
determination shall have been made, the adjustment required by this paragraph
(f) shall be made based upon the number of Purchased Shares and the aggregate
consideration payable therefor as so finally determined.

      (g) In case of a tender or exchange offer made by a Person other than the
Company or any Subsidiary for an amount which increases the offeror's ownership
of Common Shares to more than 25% of the Common Shares outstanding and shall
involve the payment by such person of consideration per share having a fair
market value (as determined by the Board of Directors, whose determination shall
be conclusive, and described in a resolution of the Board of Directors) at the
last time (the "Offer Expiration Time") tenders or exchanges may be made
pursuant to such tender or exchange offer (as it shall have been amended) that
exceeds the Current Market Price of the Common Shares on the Trading Day next
succeeding the Offer Expiration Time, and in which, as of the Offer Expiration
Time the Board of Directors is not recommending rejection of the offer, the
conversion price shall be reduced so that the same shall equal the price
determined by multiplying the conversion price in effect immediately prior to
the Offer Expiration Time by a fraction of which the numerator shall be the
number of Common Shares outstanding (including any tendered or exchanged shares)
on the Offer Expiration Time multiplied by the Current Market Price of the
Common Shares on the Trading Day next succeeding the Offer Expiration Time and
the denominator shall be the sum of (x) the fair market value (determined as
aforesaid) of the aggregate consideration payable to stockholders based on the
acceptance (up to any maximum specified in the terms of the tender or exchange
offer) of all shares validly tendered or exchanged and not withdrawn as of the
Offer Expiration Time (the shares deemed so accepted, up to any such maximum,
being referred to as the "Offer Purchased Shares") and (y) the product of the
number of Common Shares outstanding (less any Offer Purchased Shares) on the


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<PAGE>




Offer Expiration Time and the Current Market Price of the Common Shares on the
Trading Day next succeeding the Offer Expiration Time, such reduction to become
effective immediately prior to the opening of business on the day following the
Offer Expiration Time. In the event that such person is obligated to purchase
shares pursuant to any such tender or exchange offer, but such person is
permanently prevented by applicable law from effecting any such purchases or all
such purchases are rescinded, the conversion price shall again be adjusted to be
the conversion price which would then be in effect if such tender or exchange
offer had not been made. Notwithstanding the foregoing, the adjustment described
in this Section 1304 shall not be made if, as of the Offer Expiration Time, the
offering documents with respect to such offer disclose a plan or intention to
cause the Company to engage in any transaction described in Article Eight.

      (h) In case the Company shall issue Common Stock or securities convertible
into, or exchangeable for, Common Shares at a price per share (or having a
conversion or exchange price per share) that is less than the then Current
Market Price of the Common Shares (but excluding, among other things, issuances:
(a) pursuant to any bona fide plan for the benefit of employees, directors or
consultants of the Company now or hereafter in effect; (b) to acquire all or any
portion of a business in an arm's-length transaction between the Company and an
unaffiliated third party including, if applicable, issuances upon exercise of
options or warrants assumed in connection with such an acquisition; (c) in a
bona fide public offering pursuant to a firm commitment underwriting (or a
similar type of offering made pursuant to Rule 144A and/or Regulation S under
the Securities Act) or sales at the market pursuant to a continuous offering
stock program; (d) pursuant to the exercise of warrants, rights (including,
without limitation, earnout rights) or options, or upon the conversion of
convertible securities, which are issued and outstanding on the date hereof, or
which may be issued in the future at fair value and with an exercise price or
conversion price at least equal to the Current Market Price of the Common Shares
at the time of issuance of such warrant, right, option or convertible security;
and (e) pursuant to a dividend reinvestment plan or other plan hereafter adopted
for the reinvestment of dividends or interest provided that such Common Shares
are issued at a price at least equal to 95% of the Current Market Price of the
Common Shares at the time of such issuance), the conversion price shall be
adjusted so that the holder of each Security shall be entitled to receive, upon
the conversion thereof, the number of Common Shares determined by multiplying
(i) the conversion price on the day immediately prior to such date of issuance
by (ii) a fraction, the numerator of which shall be the sum of (A) the number of
Common Shares outstanding on such date and (B) the number of additional Common
Shares issued (or into which the convertible securities may convert), and the
denominator of which shall be the sum of (1) the number of Common Shares
outstanding on such date and (2) the number of Common Shares which the aggregate
consideration receivable by the Company for the total number of Common Shares so
issued (or into which the convertible securities may convert) would purchase at
such conversion price on such date. An adjustment made pursuant to this
paragraph (h) shall be made on the next Business Day following the date on which
any such issuance is made and shall be effective retroactively immediately after
the close of business on such date. For purposes of this paragraph (h), the
aggregate consideration receivable by the Company in connection with the
issuance of Common Shares or of securities convertible into Common Shares shall
be deemed to be equal to the sum of the aggregate offering price (before


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deduction of underwriting discounts or commissions and expenses payable to third
parties) of all such securities plus the minimum aggregate amount, if any,
payable upon conversion of any such convertible securities into Common Shares.

      (i) The reclassification of Common Shares into securities which include
securities other than Common Shares (other than any reclassification upon a
consolidation or merger to which Section 1311 applies) shall be deemed to
involve (i) a distribution of such securities other than Common Shares to all
holders of Common Shares (and the effective date of such reclassification shall
be deemed to be "the date fixed for the determination of stockholders entitled
to such distribution" within the meaning of paragraph (d) of this Section), and
(ii) a subdivision or combination, as the case may be, of the number of Common
Shares outstanding immediately prior to such reclassification into the number of
Common Shares outstanding immediately thereafter (and the effective date of such
reclassification shall be deemed to be "the day upon which such subdivision
becomes effective" or "the day upon which such combination becomes effective,"
as the case may be, and "the day upon which such subdivision or combination
becomes effective" within the meaning of paragraph (c) of this Section).

      In the event that the Company implements a stockholders' rights plan, such
rights plan must provide that upon conversion of the Securities the Holders will
receive, in addition to the Common Shares issuable upon such conversion, such
rights whether or not such rights have been separated from the Common Shares at
the time of such conversion, provided that such rights constitute "prescribed
securities" for purposes of Clause 212(1)(b)(vii)(E) of the Income Tax Act
(Canada).

      Rights or warrants issued by the Company to all holders of the Common
Shares entitling the holders thereof to subscribe for or purchase Common Shares
(either initially or under certain circumstances), which rights or warrants (i)
are deemed to be transferred with such Common Shares, (ii) are not exercisable
and (iii) are also issued in respect of future issuances of Common Shares, in
each case in clauses (i) through (iii) until the occurrence of a specified event
or events ("Trigger Event"), shall for purposes of this Section 1304 not be
deemed issued or distributed until the occurrence of the earliest Trigger Event,
whereupon such rights and warrants shall be deemed to have been distributed and
an appropriate adjustment (if any is required) to the Conversion Price shall be
made under this Section 1304. If any such rights or warrants, including any such
existing rights or warrants distributed prior to the date of this Indenture are
subject to subsequent events, upon the occurrence of each of which such rights
or warrants shall become exercisable to purchase different securities, evidences
of indebtedness or other assets, then the occurrence of each such event shall be
deemed to be such date of issuance and record date with respect to new rights or
warrants (and a termination or expiration of the existing rights or warrants
without exercise by the holder thereof). In addition, in the event of any
distribution (or deemed distribution) of rights or warrants, or any Trigger
Event with respect thereto, that was counted for purposes of calculating a
distribution amount for which an adjustment to the Conversion Price under this
Section 1304 was made, (1) in the case of any such rights or warrant which shall
all have been redeemed or repurchased without exercise by any holders thereof,
the Conversion Price shall be readjusted upon such final redemption or
repurchase to give effect to such distribution or Trigger Event, as the case may
be, as though it were a cash distribution, equal to the per share redemption or


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repurchase price received by a holder or holders of Common Shares with respect
to such rights or warrants (assuming such holder had retained such rights or
warrants), made to all holders of Common Shares as of the date of such
redemption or repurchase, and (2) in the case of such rights or warrants which
shall have expired or been terminated without exercise by any holders thereof,
the Conversion Price shall be readjusted as if such rights and warrants had not
been issued.

      Notwithstanding any other provision of this Section 1304 to the contrary,
rights, warrants, evidences of indebtedness, other securities, cash or other
assets (including, without limitation, any rights distributed pursuant to any
stockholder rights plan) shall be deemed not to have been distributed for
purposes of this Section 1304 if the Company makes proper provision so that each
holder of Securities who converts a Security (or any portion thereof) after the
date fixed for determination of stockholders entitled to receive such
distribution shall be entitled to receive upon such conversion, in addition to
the Common Shares issuable upon such conversions, the amount and kind of such
distributions that such holder would have been entitled to receive if such
holder had, immediately prior to such determination date, converted such
Security into Common Shares.

      (j) For purposes of this Section 1304, the following terms shall have the
meaning indicated:

            (1) "Closing Price" with respect to any securities on any day shall
      mean the last reported sales price regular way or, in case no such
      reported sale takes place on such day, the average of the reported closing
      bid and asked prices regular way, in either case on the American Stock
      Exchange or, if the Common Shares are not listed or admitted to trading on
      such exchange, on the principal national securities exchange on which the
      Common Shares are listed or admitted to trading or, if not listed or
      admitted to trading on any national securities exchange, on the Nasdaq
      National Market or, if the Common Shares are not listed or admitted to
      trading on any national securities exchange or quoted on such National
      Market, the average of the closing bid and asked prices in the
      over-the-counter market as furnished by any New York Stock Exchange member
      firm selected from time to time by the Company for that purpose.

            (2) "Current Market Price" shall mean the average of the daily
      Closing Prices for five consecutive Trading Days selected by the Company
      commencing not more than 10 Trading Days before the date in question;
      provided, however, that (i) if the "ex" date for any event (other than the
      issuance or distribution requiring such computation) that requires an
      adjustment to the conversion price pursuant to paragraph (a), (b), (c),
      (d), (e), (f), (g) or (h) above occurs during such 5 consecutive Trading
      Days, the Closing Price for each Trading Day prior to the "ex" date for
      such other event shall be adjusted by multiplying such Closing Price by
      the same fraction by which the conversion price is so required to be
      adjusted as a result of such other event, (ii) if the "ex" date for any
      event (other than the issuance or distribution requiring such computation)
      that requires an adjustment to the conversion price pursuant to paragraph
      (a), (b), (c), (d), (e), (f), (g) or (h) above occurs on or after the "ex"
      date for the issuance or distribution requiring such computation and on or
      prior to the date in question, the Closing Price for each Trading Day on


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<PAGE>




      and after the "ex" date for such other event shall be adjusted by
      multiplying such Closing Price by the reciprocal of the fraction by which
      the conversion price is so required to be adjusted as a result of such
      other event, (ii) if the "ex" date for the issuance or distribution
      requiring such computation is on or prior to the date in question, after
      taking into account any adjustment required pursuant to clause (ii) of
      this proviso, the Closing Price for each Trading Day on or after such "ex'
      date shall be adjusted by adding thereto the amount of any cash and the
      fair market value on the date in question (as determined by the Board of
      Directors in a manner consistent with any determination of such value for
      purposes of paragraph (d), (e), (f) or (g) of this Section, whose
      determination shall be conclusive and described in a Board Resolution) of
      the evidences of indebtedness, shares of capital stock or assets being
      distributed applicable to one Common Share as of the close of business on
      the day before such "ex" date. For the purpose of any computation under
      paragraph (f) or (g) of this Section, the Current Market Price on any date
      shall be deemed to be the average of the daily Closing Prices for such day
      and the next two succeeding Trading Days; provided, however that if the
      "ex" date for any event (other than the tender offer or exchange offer
      requiring such computation) that requires an adjustment to the conversion
      price pursuant to paragraph (a), (b), (c), (d), (e), (f), (g) or (h) above
      occurs on or after the Expiration Time or Offer Expiration Time as the
      case may be, for the tender offer or exchange offer requiring such
      computation and prior to the day in question, the Closing Price for each
      Trading Day prior to the "ex" date for such other event shall be adjusted
      by multiplying such Closing Price by the same fraction by which the
      conversion price is so required to be adjusted as a result of such other
      event. For purposes of this paragraph, the term "`ex' date," (i) when used
      with respect to any issuance or distribution, means the first date on
      which the Common Shares trade regular way on the relevant exchange or in
      the relevant market from which the Closing Prices were obtained without
      the right to receive such issuance or distribution, (ii) when used with
      respect to any subdivision or combination of Common Shares, means the
      first date on which the Common Shares trade regular way on such exchange
      or in such market after the time at which such subdivision or combination
      becomes effective, and (iii) when used with respect to any tender offer or
      exchange offer means the first date on which the Common Shares trade
      regular way on such exchange or in such market after the Expiration Time
      or Offer Expiration Time, as the case may be.

            (3) "Trading Day" shall mean (x) if the applicable security is
      listed or admitted for trading on the American Stock Exchange or another
      national security exchange, a day on which the American Stock Exchange or
      another national security exchange is open for business or (y) if the
      applicable security is quoted on the Nasdaq National Market, a day on
      which trades may be made thereon or (z) if the applicable security is not
      so listed, admitted for trading or quoted, any day other than a Saturday
      or Sunday or a day on which banking institutions in the State of New York
      are authorized or obligated by law or executive order to close.

      (k) The Company may make such reductions in the conversion price, in
addition to those required by paragraphs (a), (b), (c), (d), (e), (f), (g) and
(h) of this Section, as it considers to be advisable (as evidenced by a Board
Resolution) in order that any event treated for U.S. federal income tax purposes


                                       81
<PAGE>




as a dividend of stock or stock rights shall not be taxable to the recipients
or, if that is not possible, to diminish any income taxes that are otherwise
payable because of such event.

      (l) No adjustment in the conversion price shall be required unless such
adjustment (plus any other adjustments not previously made by reason of this
paragraph (I)) would require an increase or decrease of at least 1% in the
conversion price; provided, however, that any adjustments which by reason of
this paragraph (I) are not required to be made shall be carried forward and
taken into account in any subsequent adjustment.

      (m) Notwithstanding any other provision of this Section 1304, no
adjustment to the conversion price shall reduce the conversion price below the
then par value per share of the Common Shares, and any such purported adjustment
shall instead reduce the conversion price to such par value. The Company hereby
covenants not to take any action to increase the par value per share of the
Common Shares.

SECTION 1305.  NOTICE OF ADJUSTMENTS OF CONVERSION PRICE.

      Whenever the conversion price is adjusted as herein provided:

      (a) the Company shall compute the adjusted conversion price in accordance
with Section 1304 and shall prepare an Officers' Certificate signed by the
Treasurer of the Company setting forth the adjusted conversion price and showing
in reasonable detail the facts upon which such adjustment is based, and such
certificate shall forthwith be filed (with a copy to the Trustee) at each office
or agency maintained for the purpose of conversion of Securities pursuant to
Section 1002; and

      (b) a notice stating that the conversion price has been adjusted and
setting forth the adjusted conversion price shall forthwith be prepared, and as
soon as practicable after it is prepared, such notice shall be mailed by the
Company to all Holders at their last addresses as they shall appear in the
Security Register.

      Unless and until a Responsible Officer of the Trustee shall have received
an Officer's Certificate setting forth an adjustment in the conversion price,
the Trustee may assume without injury that no such adjustment has been made and
that the last conversion price of which it has received notice remains in
effect.

SECTION 1306.  NOTICE OF CERTAIN CORPORATE ACTION.

      In case:

      (a) the Company shall declare a dividend (or any other distribution) on
its Common Shares payable (i) otherwise than exclusively in cash or (ii)
exclusively in cash in an amount that would require a conversion price
adjustment pursuant to paragraph (e) of Section 1304; or



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      (b) the Company shall authorize the granting to the holders of its Common
Shares of rights or warrants to subscribe for or purchase any shares of capital
stock of any class or of any other rights (excluding shares of capital stock or
options for capital stock issued pursuant to a benefit plan for employees,
officers or directors of the Company); or

      (c) of any reclassification of the Common Shares (other than a subdivision
or combination of the outstanding Common Shares), or of any consolidation,
merger or share exchange to which the Company is a party and for which approval
of any stockholders of the Company is required, or of the sale or transfer of
all or substantially all of the assets of the Company; or

      (d) of the voluntary or involuntary dissolution, liquidation or winding up
of the Company; or

      (e) the Company or any Subsidiary shall commence a tender offer for all or
a portion of the outstanding Common Shares (or shall amend any such tender offer
to change the maximum number of shares being sought or the amount or type of
consideration being offered therefor); then the Company shall cause to be filed
(with a copy to the Trustee) at each office or agency maintained pursuant to
Section 1002, and shall cause to be mailed to all Holders at their last
addresses as they shall appear in the Security Register, at least 21 days (or 11
days in any case specified in clause (a), (b) or (c) above) prior to the
applicable record, effective or expiration date hereinafter specified, a notice
stating (x) the date on which a record is to be taken for the purpose of such
dividend, distribution or granting of rights or warrants, or, if a record is not
to be taken, the date as of which the holders of Common Shares of record who
will be entitled to such dividend, distribution, rights or warrants are to be
determined, (y) the date on which such reclassification, consolidation, merger,
share exchange, sale, transfer, dissolution, liquidation or winding up is
expected to become effective, and the date as of which it is expected that
holders of Common Shares of record shall be entitled to exchange their Common
Shares for securities, cash or other property deliverable upon such
reclassification, consolidation, merger, share exchange, sale, transfer,
dissolution, liquidation or winding up, or (z) the date on which such tender
offer commenced, the date on which such tender offer is scheduled to expire
unless extended, the consideration offered and the other material terms thereof
(or the material terms of any amendment thereto). Neither the failure to give
any such notice nor any defect therein shall affect the legality or validity of
any action described in clauses (a) through (e) of this Section 1306.

SECTION 1307.  COMPANY TO RESERVE COMMON SHARES.

      The Company shall at all times reserve and keep available, free from
preemptive rights, out of the authorized but unissued Common Shares or out of
the Common Shares held in treasury, for the purpose of effecting the conversion
of Securities, the full number of Common Shares then issuable upon the
conversion of all outstanding Securities. Shares of Common Shares issuable upon
conversion of outstanding Securities shall be issued out of the Common Shares
held in Treasury to the extent available.



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<PAGE>




SECTION 1308.     TAXES ON CONVERSIONS.

      The Company will pay any and all taxes (other than income taxes) that may
be payable in respect of the issue or delivery of Common Shares on conversion of
Securities pursuant hereto. The Company shall not, however, be required to pay
any tax which may be payable in respect of any transfer involved in the issue
and delivery of Common Shares in a name other than that of the Holder of the
Security or Securities to be converted, and no such issue or delivery shall be
made unless and until the Person requesting such issue has paid to the Company
the amount of any such tax, or has established to the satisfaction of the
Company that such tax has been paid.

SECTION 1309.  COVENANT AS TO COMMON SHARES.

      The Company covenants that all Common Shares which may be issued upon
conversion of Securities will upon issue be fully paid and nonassessable and,
except as provided in Section 1308, the Company will pay all taxes, liens and
charges with respect to the issue thereof.

SECTION 1310.  CANCELLATION OF CONVERTED SECURITIES.

      All Securities delivered for conversion shall be delivered to the Trustee
to be canceled by or at the direction of the Trustee, which shall dispose of the
same as provided in Section 309.

SECTION 1311.  PROVISIONS OF CONSOLIDATION, MERGER OR SALE OF ASSETS.

      (a) Subject to the provisions of subsection (b) below, in case of any
amalgamation or consolidation of the Company with, or merger of the Company
into, any other Person, any merger of another Person into the Company (other
than a merger which does not result in any reclassification, conversion,
exchange or cancellation of outstanding Common Shares of the Company) or any
sale or transfer of all or substantially all of the assets of the Company, the
Person formed by such consolidation or resulting from such merger or which
acquires such assets, as the case may be, shall execute and deliver to the
Trustee a supplemental indenture providing that the Holder of each Security then
outstanding shall have the right thereafter, during the period such Security
shall be convertible as specified in Section 1301, to convert such Security only
in to the kind and amount of securities, cash and other property receivable upon
such amalgamation, consolidation, merger, sale or transfer by a holder of the
number of Common Shares of the Company into which such Security might have been
converted immediately prior to such amalgamation, consolidation, merger, sale or
transfer, and assuming such holder of Common Shares of the Company (i) is not a
Person with which the Company consolidated or into which the Company merged or
which merged into the Company or to which such sale or transfer was made, as the
case may be ("Constituent Person"), or an Affiliate of a Constituent Person and
(ii) failed to exercise his rights of election, if any, as to the kind or amount
of securities, cash and other property receivable upon such consolidation,
merger, sale or transfer (provided that if the kind or amount of securities,
cash and other property receivable upon such consolidation, merger, sale or
transfer is not the same for each Common Share of the Company held immediately
prior to such consolidation, merger, sale or transfer by others than a
Constituent Person or an Affiliate thereof and in respect of which such rights
of election shall not have been exercised ("Non-electing Share"), then for the


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purpose of this Section the kind and amount of securities, cash and other
property receivable upon such amalgamation, consolidation, merger, sale or
transfer by the holders of each Non-electing Share shall be deemed to be the
kind and amount so receivable per share by a plurality of the Non-electing
Shares), and further assuming, if such consolidation, amalgamation, arrangement,
merger, sale or lease occurs prior to the later of 60 days following the date of
original issue of Securities, that the Security was convertible at the time of
such occurrence at the conversion price specified in Section 1301 as adjusted
from the issue date of such Security to such time as provided in this Article
Thirteen subject to any requirements necessary to ensure that the Securities
will be and will remain exempt from Canadian withholding tax including, without
limitation, the requirement in effect on the date hereof that a Holder of
Securities shall not be entitled to receive shares, other securities or
property, other than securities that are "prescribed securities" as defined in
Section 6208 of the Regulations under the Income Tax Act (Canada), in the event
that any such amalgamation, consolidation, merger or transfer occurs on or prior
to the day that is five years plus one day after the date of original issue of
the Securities. Such supplemental indenture shall provide for adjustments which,
for events subsequent to the effective date of such supplemental indenture,
shall be as nearly equivalent as may be practicable to the adjustments provided
for in this Article. The above provisions of this Section 1311 shall similarly
apply to successive consolidations, mergers, sales or transfers. Notice of the
execution of such a supplemental indenture shall be given by the Company to the
Holder of each Security as provided in this Indenture promptly upon such
execution.

      (b) Notwithstanding any provisions of this Article Thirteen to the
contrary, if any amalgamation, consolidation, merger, sale or transfer should
occur on or prior to the day that is five years plus one day from the date of
issue of the Securities issued hereunder, a holder of a Security shall not be
entitled in any circumstances to convert such Security into securities, cash or
other property (the "Substituted Properties") unless all such Substituted
Properties are "prescribed securities" with respect to such Security for
purposes of clause 212(1)(b)(vii)(E) of the Income Tax Act (Canada).

SECTION 1312.  TRUSTEE'S DISCLAIMER.

      The Trustee and any other conversion agent shall not at any time be under
any duty or responsibility to any holder of Securities to determine whether any
facts exist that may require any adjustment of the conversion price or notice
thereof, or with respect to the nature or extent or calculation of any such
adjustment when made, or with respect to the method employed herein or in any
supplemental indenture provided to be employed, in making the same and shall be
protected in relying upon the Officers' Certificate with respect thereto which
the Company is required to file with the Trustee pursuant to Section 1305. The
Trustee and any other conversion agent shall not be accountable with respect to
the validity or value (or the kind or amount) of any Common Shares, or of any
securities or property, that may at any time be issued or delivered upon the
conversion of any Security; and the Trustee and any other conversion agent make
no representations with respect thereto or any actions or omission by the
Company in such regard. Neither the Trustee nor any conversion agent shall be
responsible for any failure of the Company to issue, transfer or deliver any
Common Shares or stock certificates or other securities or property or cash upon


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the surrender of any Security for the purpose of conversion or to comply with
any of the duties, responsibilities or covenants of the Company contained in
this Article Thirteen.

      The Trustee shall not be under any responsibility to determine or verify
the correctness of any provisions contained in any supplemental indenture
executed pursuant to Section 1311, but may accept as conclusive evidence of the
correctness thereof, and shall be protected in relying upon, the Officers'
Certificate with respect thereto which the Company is obligated to file with the
Trustee pursuant to Section 1311.

                                ARTICLE FOURTEEN

                           RIGHT TO REQUIRE REPURCHASE

SECTION 1401.  RIGHT TO REQUIRE REPURCHASE.

      In the event that there shall occur a Repurchase Event (as defined in
Section 1406), then each Holder shall have the right, at such Holder's option,
to require the Company to purchase, and upon the exercise of such right, the
Company shall, subject to the provisions of Section 1203, purchase, all or any
part of such Holder's Securities on the date (the "Repurchase Date") that is 45
days after the date the Company gives notice of the Repurchase Event as
contemplated in Section 1402(a) at a price (the "Repurchase Price") equal to
100% of the principal amount thereof, together with accrued and unpaid interest
to the Repurchase Date. At the option of the Company, the Repurchase Price may
be paid in cash, or except as otherwise provided herein, by delivery of Common
Shares having a fair market value equal to the Repurchase Price; PROVIDED that
payment may not be made in Common Shares unless at the time of payment such
stock is listed on a national securities exchange or quoted on Nasdaq. For
purposes of this Section, the fair market value of Common Shares shall be
determined by the Company and shall be equal to 95% of the average of the
Closing Prices per share for the five consecutive Trading Days ending on and
including the third Trading Day immediately preceding the Repurchase Date.

SECTION 1402.  NOTICE; METHOD OF EXERCISING REPURCHASE RIGHT.

      (a) On or before the 15th day after the occurrence of a Repurchase Event,
the Company, or at the written request of the Company received by the Trustee at
least 30 days prior to the Repurchase Date, the Trustee (in the name and at the
expense of the Company), in its capacity as tender agent (for which services it
shall be reasonably compensated), shall give notice of the occurrence of the
Repurchase Event and of the repurchase right set forth herein arising as a
result thereof by first-class mail, postage prepaid, to the Trustee and to each
Holder of the Securities at such Holder's address appearing in the Security
Register. The Company shall also deliver a copy of such notice of a repurchase
right to the Trustee.

      Each notice of a repurchase right shall state:

            (1)   the event constituting the Repurchase Event and the date
                  thereof,

            (2)   the Repurchase Date,



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<PAGE>




            (3)   the date by which the repurchase right must be exercised,

            (4)   that such repurchase right, once exercised, may be withdrawn
                  on or prior to the close of business on the Business Day
                  immediately prior to the Repurchase Date.

            (5)   the Repurchase Price, and

            (6)   the instructions a Holder must follow to exercise a repurchase
                  right.

      In addition, at least two Business Days preceding the Repurchase Date, the
Company shall give to all Holders of the Securities, in the manner provided in
the Indenture notice specifying whether the Repurchase Price will be payable in
cash or Common Shares and shall deliver a copy of such notice to the Trustee.

      No failure of the Company to give the foregoing notice shall limit any
Holder's right to exercise a repurchase right. The Trustee shall have no
affirmative obligation to determine if there shall have occurred a Repurchase
Event.

      (b) To exercise a repurchase right, a Holder shall deliver to the Company
(or an agent designated by the Company for such purpose in the notice referred
to in (a) above) and to the Trustee on or before the close of business on the
Repurchase Date (i) written notice of the Holder's exercise of such right, which
notice shall set forth the name of the Holder, the principal amount of the
Security or Securities (or portion of a Security) to be repurchased, and a
statement that an election to exercise the repurchase right is being made
thereby, and (ii) the Security or Securities with respect to which the
repurchase right is being exercised, duly endorsed for transfer to the Company.
The repurchase right, once exercised by such Holder, may be withdrawn on or
prior to the close of business on the Business Day immediately prior to the
Repurchase Date. If the Repurchase Date falls between any Regular Record Date
and the next succeeding Interest Payment Date, Securities to be repurchased must
be accompanied by payment from the Holder of an amount equal to the interest
thereon which the registered Holder thereof is to receive on such Interest
Payment Date.

      In the event a repurchase right shall be exercised in accordance with the
terms hereof, the Company shall on the Repurchase Date pay or cause to be paid
in cash to the Holder thereof the Repurchase Price of the Security or Securities
as to which the repurchase right had been exercised. In the event that a
repurchase right is exercised with respect to less than the entire principal
amount of a surrendered Security, the Company shall execute and deliver to the
Trustee and the Trustee shall authenticate for issuance in the name of the
Holder a new Security or Securities in the aggregate principal amount of the
unrepurchased portion of such surrendered security.

SECTION 1403.  DEPOSIT OF REPURCHASE PRICE.

      On or prior to 10:00 a.m. (New York City time) on any Repurchase Date, the
Company shall deposit with the Trustee or with a Paying Agent (or, if the
Company is acting as its own Paying Agent, segregate and hold in trust as


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<PAGE>




provided in Section 1003) an amount of money in same day funds or Common Shares
sufficient to pay the Repurchase Price of the Securities which are to be repaid
on the Repurchase Date.

SECTION 1404.  SECURITIES NOT REPURCHASED ON REPURCHASE DATE.

      If any Security surrendered for repurchase shall not be so paid on the
Repurchase Date, the principal shall, until paid, bear interest to the extent
permitted by applicable law from the Repurchase Date at the rate per annum borne
by such Security.

SECTION 1405.  SECURITIES REPURCHASED IN PART.

      Any Security which is to be repurchased only in part shall be surrendered
at any office or agency of the Company designated for that purpose pursuant to
Section 1002 (with, if the Company or the Trustee so requires, due endorsement
by, or 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 any authorized denomination as requested by such
Holder, in aggregate principal amount equal to and in exchange for the
unrepurchased portion of the principal of the Security so surrendered.

SECTION 1406.  CERTAIN DEFINITIONS.

      For purposes of this Article:

      (a) A "Repurchase Event" shall have occurred upon the occurrence of a
Change in Control after the date of this Indenture.

      (b) A "Change in Control" shall occur when:

            (i)   all or substantially all of the Company's assets are sold
as an entirety to any person or related group of persons;

            (ii) there shall be consummated any consolidation or merger of the
Company (A) in which the Company is not the continuing or surviving corporation
(other than a consolidation or merger with a wholly owned subsidiary of the
Company in which all Common Shares outstanding immediately prior to the
effectiveness thereof are changed into or exchanged for the same consideration)
or (B) pursuant to which the Common Shares would be converted into cash,
securities or other property, in each case, other than a consolidation or merger
of the Company in which the holders of the Common Shares immediately prior to
the consolidation or merger have, directly or indirectly, at least a majority of
the total voting power of all classes of capital stock entitled to vote
generally in the election of directors of the continuing or surviving
corporation immediately after such consolidation or merger in substantially the
same proportion as their ownership of Common Shares immediately before such
transaction;



                                       88
<PAGE>




            (iii) any person, or any persons acting together which would
constitute a group" for purposes of Section 13(d) of the Exchange Act (a
"Group"), together with any Affiliates thereof, shall beneficially own (as
defined in Rule 13d-3 under the Exchange Act) at least 50% of the total voting
power of all classes of capital stock of the Company entitled to vote generally
in the election of directors of the Company; or

            (iv)  the Company is liquidated or dissolved or adopts a plan of
liquidation or dissolution;

PROVIDED, HOWEVER, that a Change in Control shall not be deemed to have occurred
if either (x) the Closing Price per share on any five Trading Days within the
period of 10 consecutive Trading Days ending immediately after the later of the
date of the Change in Control or the date of the public announcement of the
Change in Control (in the case of a Change in Control under Clause (iii) above)
or the period of 10 consecutive Trading Days ending immediately prior to the
date of the Change in Control (in the case of a Change in Control under Clause
(i) and (ii) above) shall equal or exceed 105% of the conversion price in effect
on such Trading Day or (y) all the consideration (excluding cash payments for
fractional shares) to be paid for the Common Shares in a transaction or
transactions constituting the Change in Control as described in Clause (i) or
(ii) above consists of shares of common stock traded on a United States national
securities exchange or quoted on Nasdaq National Market System and as a result
of such transaction or transactions the Securities become convertible solely
into such common stock, and such common stock is a "prescribed security" with
respect to the Securities for purposes of clause 212(1)(b)(vii)(E) of the Income
Tax Act (Canada);

SECTION 1407.  MERGER, CONSOLIDATION, ETC.

      In the case of any merger, consolidation, sale or transfer of all or
substantially all of the assets of the Company to which Section 1311 applies, in
which the Common Shares of the Company is changed or exchanged as a result into
the right to receive securities, cash or other property which includes Common
Shares of the Company or common stock of another Person that are, or upon
issuance will be, traded on a United States national securities exchange or
approved for trading on an established automated over-the-counter trading market
in the United States and such shares constitute at the time such change or
exchange becomes effective in excess of 50% of the aggregate fair market value
of such shares of stock and other securities, property and assets (including
cash) (as determined by the Company, which determination shall be conclusive and
binding and evidenced by a Board Resolution), then the Company and the Person
resulting from such merger, consolidation, sale or transfer, as the case may be,
shall execute and deliver to the Trustee a supplemental indenture (which shall
comply with the Trust Indenture Act as in force at the date of execution of such
supplemental indenture) modifying the provisions of this Indenture relating to
the right of Holders to cause the Company to repurchase the Securities following
a Repurchase Event, including without limitation the applicable provisions of
this Article Fourteen and the definitions of the Common Shares and Change of
Control, as appropriate, and such other related definitions set forth herein as
determined in good faith by the Company (which determination shall be conclusive
and binding), to make such provisions apply in the event of a subsequent


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Repurchase Event to the common stock and the issuer thereof if different from
the Company and the Common Shares of the Company (in lieu of the Company and
Common Shares of the Company).



                                 ARTICLE FIFTEEN

                                    SECURITY

SECTION 1501.  SECURITY AND PLEDGE AGREEMENT.

      In order to secure the due and punctual payment of the principal of
(premium and Additional Amounts, if any) and interest on the Securities when and
as the same shall be due and payable, whether on an Interest Payment Date, at
the Stated Maturity, by acceleration, call for redemption, or otherwise, and
interest on the overdue principal, premium and Additional Amounts and interest,
if any, of the Securities and performance of all other obligations of the
Company to the Holders or the Trustee under this Indenture and the Securities,
according to the terms hereunder or thereunder, the Company will make an
assignment of its right, title and interest in and to the Collateral to the
Trustee pursuant to the Security and Pledge Agreement and to the extent therein
provided, no later than the Closing Date. Each Holder, by its acceptance of a
Security, consents and agrees to the terms of the Security and Pledge Agreement
(including, without limitation, the provisions providing for foreclosure and
release of Collateral) as the same may be in effect or may be amended from time
to time in accordance with the terms thereof and hereof. The Company (a) will
forever warrant and defend the title to the Collateral against the claims of all
persons whatsoever (including the holders of Senior Indebtedness), (b) will
execute, acknowledge and deliver to the Trustee such further assignments,
transfers, assurances or other instruments as the Trustee may reasonably require
or request, and (c) will do or cause to be done all such acts and things as may
be necessary and proper, or as may be required by the Trustee, to assure and
confirm to the Trustee the security interest in the Collateral contemplated
hereby and by the Security and Pledge Agreement or any part thereof, as from
time to time constituted, so as to render the same available for the security
and benefit of this Indenture and of the Securities secured hereby, according to
the intent and purposes herein expressed. The Company shall take, or cause its
Subsidiaries to take, upon request of the Trustee, any and all actions
reasonably requested to cause the Security and Pledge Agreement to create and
maintain, as security for this Indenture and the obligations of the Company,
except as expressly otherwise contemplated by the Security and Pledge Agreement,
a valid and enforceable first priority Lien in and on the Collateral, in favor
of the Trustee, superior to and prior to the rights of all third Persons, and
subject to no other Liens.

SECTION 1502.  RECORDING, ETC.

      (a) The Company will cause, at its own expense, the Security and Pledge
Agreement and this Indenture and all amendments or supplements thereto to be
registered, recorded and filed or re-recorded, re-filed and renewed in such
manner and in such place or places, if any, as may be required by law in order


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fully to preserve and protect the security interests created under the Security
and Pledge Agreement and to effectuate and preserve the security therein of the
Holders and all rights of the Trustee.

      (b) The Company shall furnish to the Trustee, within 30 days after any
such action set forth in subsection (a) above is taken, and annually on each
anniversary of the Closing Date, an Officers' Certificate and an Opinion of
Counsel complying with all requirements of the Trust Indenture Act and stating
that such action has been taken in accordance with Section 1502(a) of this
Indenture.

SECTION 1503.  INTENTIONALLY LEFT BLANK.

SECTION 1504.  CERTIFICATES OF THE COMPANY.

      In addition to all certificates and documents required to be furnished by
the Company under the Security and Pledge Agreement, the Company shall furnish
to the Trustee, prior to the proposed release of Collateral pursuant to this
Indenture and the Security and Pledge Agreement, (i) all documents required by
TIA ss. 314(d) and (ii) an Opinion of Counsel to the effect that such
accompanying documents constitute all documents required by TIA ss.
314(d).

SECTION 1505.  SUITS TO PROTECT THE COLLATERAL.

      The Trustee shall have power to institute and maintain such suits and
proceedings as it may deem expedient to prevent any impairment of the Collateral
by any acts which may be unlawful or in violation of the Security and Pledge
Agreement or this Indenture, and such suits and proceedings as the Trustee may
deem expedient to preserve or protect its interests and the interests of the
Holders in the Collateral (including power to institute and maintain suits or
proceedings to restrain the enforcement of or compliance with any legislative or
other governmental enactment, rule or order that may be unconstitutional or
otherwise invalid if the enforcement of, or compliance with, such enactment,
rule or order would impair the security hereunder or be prejudicial to the
interests of the Holders of the Trustee).

SECTION 1506.  AUTHORIZATION OF RECEIPT OF FUNDS BY THE TRUSTEE UNDER THE
SECURITY AND PLEDGE AGREEMENT.

      The Trustee is authorized to receive any funds for the benefit of the
Holders distributed under the Security and Pledge Agreement, and to make further
distributions of such funds to the Holders according to the provisions of this
Indenture.




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<PAGE>



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


                                    NORTH AMERICAN VACCINE, INC.



                                    By:  /s/ Daniel J. Abdun-Nabi
                                         ---------------------------------
                                         Daniel J. Abdun-Nabi, Senior Vice
                                         President-Legal Affairs



                                    By:  /s/ Lawrence J. Hineline
                                         ---------------------------------
                                         Lawrence J. Hineline - Vice
                                         President-Finance


                                    BANKERS TRUST COMPANY, as Trustee



                                    By:  /s/ Ednora G. Linares
                                         ---------------------------------
                                         Name:  Ednora G. Linares
                                         Title: Assistant Vice President






                          SECURITY AND PLEDGE AGREEMENT


      THIS  SECURITY  AND  PLEDGE  AGREEMENT,  dated  as of  November  12,  1998
("Agreement"),  is made by NORTH AMERICAN VACCINE,  INC., a Canadian corporation
("NAVA"  or  "Pledgor"),  in favor of BANKERS  TRUST  COMPANY,  as trustee  (the
"Trustee") for the holders (the "Holders") of the Securities(as defined herein).


                                 R E C I T A L S

      Pledgor  and the  Trustee  have  entered  into an  indenture  dated  as of
November 12, 1998 (as amended,  amended and restated,  supplemented or otherwise
modified from time to time, the  "Indenture"),  pursuant to which the Pledgor is
issuing on the date hereof $25,000,000 in aggregate principal amount at maturity
of its 4.5% Secured Convertible Notes due 2003 (the  "Securities").  Capitalized
terms used herein and not otherwise defined herein shall have the meanings given
to such terms in the Indenture.

      It is a  condition  precedent  to the  purchase of the  Securities  by the
Holders that Pledgor shall have granted the assignment and security interest and
made the pledge and assignment contemplated by this Agreement.

      Unless otherwise defined in this Agreement,  terms defined in Article 9 of
the Uniform  Commercial Code in effect in the State of Maryland (the "Code") are
used in this Agreement as such terms are defined there.

      NOW THEREFORE,  in consideration  of the premises,  and in order to induce
the Holders to purchase the Notes,  the Pledgor  hereby  agrees with the Trustee
for its benefit and the ratable benefit of the Holders as follows:

      SECTION 1.  Pledge and Security Interest.

      Pledgor  hereby assigns and pledges to the Trustee for its benefit and for
the ratable  benefit of the  Holders,  and hereby  grants to the Trustee for its
benefit  and for the  ratable  benefit of the  Holders,  a  continuing  security
interest in all of its right,  title and  interest in the  following  collateral
owned by the Pledgor (collectively, the "Collateral"):

            (i) The equipment and related assets more particularly  described on
Annex A hereto ("Equipment").

            (ii) The United States patent more particularly described on Annex B
hereto ("Patent").


<PAGE>




      SECTION 2.  Security for Obligations.

      (a) This Agreement  secures the payment and performance  when due (whether
for principal,  interest,  fees, expenses or otherwise,  at stated maturity,  by
acceleration or otherwise) of the obligations of the Pledgor under the Indenture
or under this Agreement (the "Secured Obligations").

      (b) The  Pledgor  and the  Holders,  by such  Holders'  acceptance  of the
Securities, hereby confirm that it is the intention of all such parties that the
pledge  contemplated  by this Agreement not constitute a fraudulent  transfer or
conveyance  for purposes of Bankruptcy  Law (as defined in the  Indenture),  the
Uniform Fraudulent  Conveyance Act, the Uniform  Fraudulent  Transfer Act or any
similar  federal or state law to the extent  applicable  to this  Agreement.  To
effectuate  the  foregoing  intention,   the  Holders  and  the  Pledgor  hereby
irrevocably agree that the obligations of the Pledgor under this Agreement shall
be limited to the maximum  amount as will,  after giving  effect to such maximum
amount and all other  contingent  and fixed  liabilities of the Pledgor that are
relevant  under such laws,  result in the  obligations of the Pledgor under this
Agreement not constituting a fraudulent transfer or conveyance

      (c) Without  limiting the  generality  of the  foregoing,  this  Agreement
secures  the  payment  of all  amounts  that  constitute  part  of  the  Secured
Obligations  and would be owed by Pledgor to the Holders under the Indenture and
the Securities but for the fact that they are unenforceable or not allowable due
to the existence of a bankruptcy, reorganization or similar proceeding involving
the Pledgor.

      SECTION 3.  Delivery of Collateral.

            All  certificates or instruments  representing or evidencing any and
all of the  Collateral  shall be  delivered  to and held by or on  behalf of the
Trustee  pursuant hereto and shall be in suitable form for transfer by delivery,
or shall be accompanied  by duly executed  instruments of transfer or assignment
in blank,  all in form and substance  satisfactory  to the Trustee.  The Trustee
shall  have the  right,  at any time in its  discretion  and  without  notice to
Pledgor  after the  occurrence  of an Event of  Default,  to  transfer  to or to
register  in the name of the  Trustee or any of its  nominees  any or all of the
Collateral.

      SECTION 4.  Representations and Warranties.

      (a)  Pledgor represents and warrants as follows:

            (i) The  execution,  delivery  and  performance  by  Pledgor of this
Agreement are within Pledgor's  corporate  powers,  have been duly authorized by
all necessary  corporate action, and do not contravene,  or constitute a default
under,  any provision of applicable  law or regulation or of the  certificate of
incorporation or by-laws of Pledgor or of any agreement,  judgment,  injunction,
order,  decree  or other  instrument,  binding  upon  Pledgor  or  result in the
creation  or  imposition  of any Lien on any assets of  Pledgor,  except for the
security interests granted under this Agreement.



                                       2
<PAGE>




            (ii) This  Agreement  creates a valid and perfected  first  priority
security  interest in the Collateral  (subject in all instances to the interests
of  landlords'  in the  Equipment as provided in related  leasehold  agreements)
securing the payment of the Secured  Obligations.  All filings and other actions
necessary or desirable to perfect and protect the  foregoing  security  interest
have been duly taken by the Pledgor.

            (iii)  Pledgor is, and at the time of delivery of any  Collateral to
the  Trustee  pursuant  to  Section 3 of this  Agreement  will be, the legal and
beneficial owner of the Collateral,  free and clear of any Lien or claims of any
Person  except for the interests of landlords' in the Equipment and the lien and
security interest created by this Agreement. No effective financing statement or
other instrument similar in effect covering all or any part of the Collateral is
on file in any recording office,  except such as may have been filed in favor of
the Trustee relating to this Agreement.

            (iv) This  Agreement has been duly executed and delivered by Pledgor
and constitutes a legal,  valid and binding  obligation of Pledgor,  enforceable
against Pledgor in accordance with its terms,  except as such enforceability may
be   limited   by  the  effect  of  any   applicable   bankruptcy,   insolvency,
reorganization,  moratorium or other similar laws  affecting  creditors'  rights
generally or general principles of equity.

            (v) Except as  discussed  in the Offering  Circular  distributed  in
connection  with the sale of the  Securities,  no litigation,  investigation  or
proceeding of or before any arbitrator or governmental  authority is pending or,
to the knowledge of Pledgor,  threatened  by or against  Pledgor with respect to
this  Agreement  or the pledge of  Collateral  by Pledgor  contemplated  hereby,
except in each case for such  litigations,  investigations  or proceedings that,
singly or in the aggregate,  are not  reasonably  likely to result in a material
adverse effect on (i) the business, properties, operations, assets, liabilities,
net worth,  condition  (financial  or otherwise) or prospects of Pledgor and its
consolidated  subsidiaries,  taken as a whole or (ii) the  ability of Pledgor to
perform any of its obligations under this Agreement or the Indenture;

            (vi) Other than has been or will be made or obtained,  no consent of
any other Person and no consent, authorization, approval or other action by, and
no notice to or filing with, any  governmental  authority or regulatory  body or
other  Person is  required  either for the  pledge by Pledgor of the  Collateral
pursuant to this Agreement or for the execution, delivery or performance of this
Agreement by Pledgor,  (ii) the  perfection or maintenance of the pledge created
hereby  (including the first priority nature of such pledge) or (iii) except for
the  exercise  by the  Trustee of the  remedies  in  respect  of the  Collateral
pursuant to this Agreement.

            (vii) The principal place of business and chief executive  office of
Pledgor and the office where Pledgor keeps its records concerning the Collateral
are located at



                                       3
<PAGE>




                  North American Vaccine, Inc.
                  10150 Old Columbia Road
                  Columbia, Maryland 21046
                  Attention:  Daniel J. Abdun-Nabi
                  Tel:  (410) 309-7100          Fax:  (410) 309-4077

            (viii) As of the date  hereof,  all  information  set  forth  herein
relating to the Collateral is accurate and complete in all respects.

      SECTION 5.  Further Assurances.

      (a) Pledgor  agrees that at any time and from time to time, at the expense
of Pledgor, Pledgor will promptly execute and deliver or use its best efforts to
cause to be executed and delivered all further  instruments  and documents,  and
take all further action, that may be necessary or desirable, or that the Trustee
may  request,  in order to perfect  and protect  the  priority of the  Trustee's
security interest in the Collateral, any pledge, assignment or security interest
granted or purported  to be granted  hereby or to enable the Trustee to exercise
and enforce its rights and remedies  hereunder  with respect to any  Collateral.
Without limiting the generality of the foregoing,  Pledgor will execute and file
such financing or continuation statements, or amendments thereto, and such other
instruments or notices, as may be necessary or desirable,  or as the Trustee may
request,  in order to perfect and preserve the pledge,  assignment  and security
interest granted or purported to be granted hereby.

      (b) Pledgor hereby authorizes the Trustee to file one or more financing or
continuation statements,  and amendments thereto, relating to all or any part of
the  Collateral  without the  signature  of Pledgor  where  permitted  by law. A
photocopy or other  reproduction  of this  Agreement or any financing  statement
covering the  Collateral  or any part thereof shall be sufficient as a financing
statement where permitted by law.

      (c) Pledgor will furnish to the Trustee from time to time  statements  and
schedules  further  identifying  and  describing  the  Collateral and such other
reports in connection with the Collateral as the Trustee may reasonably request,
all in reasonable detail.

      SECTION 6.  As to Equipment.

      (a) Pledgor  shall keep the  Equipment  at the places  therefor  specified
herein  or,  upon 30 days prior  written  notice to the  Trustee,  at such other
places in a jurisdiction  where all action required by Section 5 shall have been
taken with respect to the Equipment.

      (b) Pledgor shall cause the  Equipment to be  maintained  and preserved in
accordance with its existing  practices and shall  forthwith,  or in the case of
any loss or damage to any of the Equipment as quickly as  practicable  after the
occurrence thereof, make or cause to be made all repairs, replacements and other
improvements  in  connection  therewith  that are necessary or desirable to such
end.  Pledgor shall promptly  furnish to the Trustee a statement  respecting any
loss or damage to any of the Equipment.



                                       4
<PAGE>




      SECTION 7.

            Covenants.  Pledgor  covenants  and agrees  with the Trustee and the
Holders from and after the date of this Agreement until the Secured  Obligations
have been paid in full:

      (a) Except as permitted by the Indenture and this Agreement,  Pledgor will
not (i) sell, assign (by operation of law or otherwise) or otherwise dispose of,
or grant any option or warrant  with  respect  to, any of the  Collateral,  (ii)
create  or  permit  to  exist  any  Lien  upon  or  with  respect  to any of the
Collateral,  except as  permitted  hereunder,  or (iii)  transfer  or  otherwise
dispose of any Collateral or take any corporate action to authorize the transfer
or disposition of any Collateral, accept as contemplated herein.

      (b)  Pledgor  agrees  that  it  will  not  enter  into  any  agreement  or
understanding  that purports to or may restrict or inhibit the Trustee's  rights
or remedies hereunder,  including,  without  limitation,  the Trustee's right to
sell or otherwise dispose of the Collateral.

      (c) Pledgor shall keep its principal place of business and chief executive
office and the office where it keeps its records  concerning  the  Collateral at
the  location  specified  in Section  4(a)(vii)  above or,  upon 30 days'  prior
written notice to the Trustee,  at such other  location in a jurisdiction  where
all actions  required  by Section 5 above shall have been taken with  respect to
the  Collateral.  Pledgor  will hold and  preserve  such records and will permit
representatives  of the  Trustee at any time  during  normal  business  hours to
inspect and make copies or abstracts from such records and chattel paper.

      (d)  Pledgor  will  at all  times  be the  sole  beneficial  owner  of the
Collateral.

      SECTION 8.  Trustee Appointed Attorney-in-Fact.

            In addition to all of the powers granted to the Trustee  pursuant to
the Indenture but subject to the limitations in this  Agreement,  Pledgor hereby
irrevocably  appoints  the  Trustee  as  Pledgor's  attorney-in-fact,  with full
authority  in the place  and  stead of  Pledgor  and in the name of  Pledgor  or
otherwise,  from time to time in the Trustee's discretion to take any action and
to execute any  instrument  which the Trustee may  reasonably  deem necessary or
advisable to  accomplish  the  purposes of this  Agreement,  including,  without
limitation:

      (a) to ask for, demand, collect, sue for, recover, compromise, receive and
give  acquittance  and  receipts  for  moneys  due and to become due under or in
respect of any of the Collateral,

      (b) to receive,  endorse and collect any drafts or other  instruments  and
documents, in connection with clause (a) above, and



                                       5
<PAGE>




      (c) to file any claims or take any  action or  institute  any  proceedings
that the Trustee may deem  necessary or desirable  for the  collection of any of
the Collateral or otherwise to enforce the rights of the Trustee with respect to
any of the Collateral.

      SECTION 9.  Trustee May Perform.

            If Pledgor  fails to perform any  agreement  contained  herein,  the
Trustee,  subject  to the  limitations  in this  Agreement,  below,  may  itself
perform,  or cause  performance  of,  such  agreement,  and the  expenses of the
Trustee,  including the fees and expenses of its counsel, incurred in connection
therewith shall be payable by Pledgor.

      SECTION 10.  The Trustee's Duties.

            The powers conferred on the Trustee  hereunder are solely to protect
its interest in the Collateral and shall not impose any duty upon it to exercise
any such powers. Except for the safe custody of any Collateral in its possession
and the accounting  for moneys  actually  received by it hereunder,  the Trustee
shall have no duty as to any  Collateral,  as to  ascertaining  or taking action
with  respect to calls,  conversions,  exchanges,  maturities,  lenders or other
matters relative to any Collateral, whether or not the Trustee or any Holder has
or is deemed  to have  knowledge  of such  matters,  or as to the  taking of any
necessary  steps to preserve  rights  against  any  parties or any other  rights
pertaining  to any  Collateral.  The Trustee  shall be deemed to have  exercised
reasonable  care  in the  custody  and  preservation  of any  Collateral  in its
possession if such Collateral is accorded treatment  substantially equal to that
which the Trustee accords trust property.

      SECTION 11.  Subsequent Changes Affecting Collateral.

            Pledgor  represents  to the Trustee and the Holders that Pledgor has
made its own arrangements  for keeping informed of changes or potential  changes
affecting the  Collateral,  and Pledgor  agrees that the Trustee and the Holders
shall have no  responsibility  or liability  for  informing  Pledgor of any such
changes or  potential  changes or for taking any action or  omitting to take any
action with respect thereto. Pledgor covenants that it will not vote or take any
other action to sell or otherwise  dispose of, or grant any option, or create or
permit to exist any Lien upon or, with respect to any of the  Collateral  except
with respect to Collateral released from this Agreement or sales or dispositions
of Collateral in accordance with this Agreement and the Indenture.  Pledgor will
defend the right,  title and  interest  of the Trustee and the Holders in and to
the Collateral against the claims and demands of all Persons.

      SECTION 12.  Remedies  Upon  Default.  If any Event of Default  shall have
occurred and be continuing.

      (a) (i) The  Trustee  and the  Holders  may  exercise  in  respect  of the
Collateral,  in addition to other  rights and  remedies  provided  for herein or
otherwise  available to it, all the rights and remedies of a secured  party upon
default  under the Code,  and the Trustee may also in its sole  discretion,  (i)
require  Pledgor to, and Pledgor  hereby agrees that it will, at its expense and


                                       6
<PAGE>




upon request of the Trustee forthwith, assemble all or part of the Collateral as
directed by the Trustee  and make it  available  to the Trustee at a place to be
designated  by the Trustee that is reasonably  convenient  to both parties,  and
(ii) without notice except as specified  below,  sell the Collateral or any part
thereof  in one or  more  parcels  at  public  or  private  sale,  at any of the
Trustee's offices or elsewhere,  for cash, on credit or for future delivery, and
at such price or prices and upon such other terms and  otherwise  in such manner
as the Trustee may deem commercially  reasonable,  irrespective of the impact of
any such sales on the market price of the Collateral. Each purchaser at any such
sale shall hold the property sold absolutely free from any claim, encumbrance or
right on the part of Pledgor, and, with respect to any such Collateral sold upon
default,  Pledgor  hereby waives (to the extent  permitted by law) all rights of
redemption,  stay  and or  appraisal  which it now has or may at any time in the
future have under any rule of law or statute now existing or hereafter  enacted.
Pledgor  agrees that,  to the extent notice of sale shall be required by law, at
least ten days'  notice to Pledgor  of the time and place of any public  sale or
the time after which any private sale is to be made shall constitute  reasonable
notification.  The Trustee shall not be obligated to make any sale of Collateral
regardless  of notice of sale  having  been  given.  The Trustee may adjourn any
public or private sale from time to time by  announcement  at the time and place
fixed therefor,  and such sale may, without further notice,  be made at the time
and place to which it was so adjourned. Pledgor hereby waives any claims against
the Trustee arising by reason of the fact that the price at which any Collateral
may have been sold at such a private  sale was less than the price  which  might
have been obtained at a public sale, even if the Trustee accepts the first offer
received and does not offer such Collateral to more than one offeree.

      (b) The Trustee may exercise any and all rights and remedies of Pledgor in
respect of the Collateral,  including,  without  limitation,  any and all of the
rights of Pledgor to demand or otherwise require payment of any amount under, or
performance of any provision of, the Indenture.

      (c) All payments received by Pledgor in respect of the Collateral shall be
received in trust for the benefit of the Trustee, shall be segregated from other
funds of Pledgor  and shall be  forthwith  paid over to the  Trustee in the same
form as so received (with any necessary endorsement).

      SECTION 13.  Application of Proceeds.

            After and during the  continuance  of an Event of Default,  any cash
held by the Trustee as Collateral and all cash proceeds  received by the Trustee
(all such cash being  "Proceeds") in respect of any sale of, collection from, or
other  realization  upon  all or any  part  of the  Collateral  pursuant  to the
exercise  by the Trustee of its  remedies  as a secured  creditor as provided in
this  Agreement  shall be applied  promptly  from time to time by the Trustee as
follows:

            First,  to the  payment  of the costs  and  expenses  of such  sale,
collection  or  other  realization,  including  reasonable  compensation  to the
Trustee and its agents and  counsel,  and all fees,  expenses,  liabilities  and


                                       7
<PAGE>




advances  made  or  incurred  by the  Trustee  and its  agents  and  counsel  in
connection therewith;

            Second, to the payment of the Secured Obligations in accordance with
the Indenture;

            Third, after payment in full of all Secured Obligations, to Pledgor,
or its  successors  or assigns,  or to  whomsoever  may be lawfully  entitled to
receive the same or as a court of  competent  jurisdiction  may  direct,  of any
surplus then remaining from such Proceeds.

      SECTION 14.  Indemnity and Expenses.

      (a) Pledgor  agrees to indemnify  the Trustee  (which for purposes of this
Section shall include its officers,  directors,  employees, and agents) from and
against any and all claims,  losses and liabilities  growing out of or resulting
from  this  Agreement  (including,  without  limitation,   enforcement  of  this
Agreement),  except claims,  losses, or liabilities resulting from the Trustee's
gross  negligence or willful  misconduct as determined by a final  judgment of a
court of competent jurisdiction. This indemnity shall survive the termination of
this Agreement and the resignation or removal of the Trustee.

      (b) Pledgor  will upon demand pay to the Trustee the amount of any and all
reasonable  expenses,  including the reasonable fees, expenses and disbursements
of its counsel  and of any  experts  and agents,  which the Trustee may incur in
connection with (i) the  administration  of this Agreement,  (ii) the custody or
preservation of, or the sale of,  collection from, or the realization  upon, any
of the Collateral, (iii) the exercise or enforcement of any of the rights of the
Trustee or the  Holders  hereunder  or (iv) the failure by Pledgor to perform or
observe any of the provisions hereof.

      (c) Pledgor  agrees to pay fees and  expenses  of White & Case,  Trustee's
counsel,  on or prior to the  Closing  Date,  as  defined in the  Indenture,  in
connection with the preparation, execution, and delivery of this Agreement.

      SECTION 15.  Security Interest Absolute.

            The  obligations of Pledgor under this Agreement are  independent of
the  Secured  Obligations,  and a separate  action or actions may be brought and
prosecuted against Pledgor to enforce this Agreement.  All rights of the Trustee
and the Holders and security interests hereunder, and all obligations of Pledgor
hereunder, shall be absolute and unconditional irrespective of:

      (a) any lack of validity or  enforceability  of the Indenture or any other
agreement or instrument relating thereto;



                                       8
<PAGE>




      (b) any change in the time, manner or place of payment of, or in any other
term of, all or any of the Secured Obligations, or any other amendment or waiver
of or any consent to any departure from the Indenture;

      (c) any taking,  exchange,  surrender,  release or  non-perfection  of any
Liens on any other collateral,  or any taking, release or amendment or waiver of
or  consent  to  departure  from any  guarantee,  for all or any of the  Secured
Obligations; or

      (d) any other  circumstance  which might  otherwise  constitute  a defense
available to, or a discharge of,  Pledgor in respect of the Secured  Obligations
or of this Agreement.

      SECTION 16.  Substitution of Collateral.

            Notwithstanding any provisions of this Agreement, Pledgor shall have
the  right,  from time to time,  to  substitute  other  collateral  ("Substitute
Collateral")  for all or any  portion  of the  Collateral  then  subject to this
Agreement;  provided,  however,  that  (i)  in the  event  that  the  Substitute
Collateral is equipment,  the acquisition  cost of such equipment shall be equal
to or greater in value than the  Equipment to be released from the terms of this
Agreement,  as established by an Officers'  Certificate;  and (ii) the aggregate
value  on the  date of  substitution  of  other  Substitute  Collateral  and any
existing  Collateral  that will remain subject to this Agreement  following such
substitution  shall be not less than the aggregate face value of Securities then
outstanding.  Under any substitution,  the Pledgor and Trustee will execute such
documents  and take such actions as may be  reasonably  necessary to release the
Collateral  being  released from this  Agreement  and to subject the  Substitute
Collateral  to the  provisions  of  this  Agreement.  All  costs  in  connection
therewith shall be borne solely by Pledgor.

      SECTION 17.  Amendments, Waivers and Consents.

            No amendment or waiver of any  provision of this  Agreement,  and no
consent to any  departure by Pledgor  herefrom,  shall in any event be effective
unless  the same shall be in writing  and signed by the  Trustee,  and then such
waiver or consent shall be effective  only in the specific  instance and for the
specific  purpose for which given.  Any  amendment or waiver of any provision of
this Agreement and any consent to any departure by Pledgor from any provision of
this Agreement  shall be effective only if made or given in compliance  with all
of the terms and  provisions  of the  Indenture  and neither the Trustee nor any
Holder shall be deemed, by any act, delay, indulgence, omission or otherwise, to
have waived any right or remedy  hereunder or to have  acquiesced in any Default
or Event of Default or in any breach of any of the terms and conditions  hereof.
Failure of the Trustee or any Holder to exercise,  or delay in  exercising,  any
right,  power or privilege  hereunder  shall not operate as waiver  thereof.  No
single or partial  exercise of any right,  power or  privilege  hereunder  shall
preclude  any other or further  exercise  thereof or the  exercise  of any other
right, power or privilege. A waiver by the Trustee or any Holder of any right or
remedy  hereunder  on any one  occasion  shall not be  construed as a bar to any
right or remedy  that the  Trustee or such Holder  would  otherwise  have on any
future occasion. The rights and remedies herein provided are cumulative,  may be
exercised singly or concurrently and are not exclusive of any rights or remedies
provided by law.



                                       9
<PAGE>




            SECTION 18.  Addresses for Notices.

             All notices and other  communications  provided for hereunder shall
be in the form and manner,  and delivered to each of the parties hereto at their
respective addresses, as set forth or provided for in the Indenture.

      SECTION 19.  Concerning the Trustee.

      (a) Pursuant to the Indenture, the Holders shall have the right, by one or
more instruments in writing executed and delivered to the Trustee, to direct the
time,  method and place of  conducting  any  proceeding  for any right or remedy
available to the Trustee,  or of exercising any trust or power  conferred on the
Trustee,  or for the  appointment of a receiver,  or to direct the taking or the
refraining from taking of any action authorized by this Agreement; provided that
(i) such discretion shall not conflict with the provisions of any law or of this
Agreement  or  the  Indenture,  (ii)  the  Trustee  be  adequately  secured  and
indemnified  as  provided in the  Indenture  and (iii) such  direction  does not
involve the Trustee in personal liability and is not unjustly prejudicial to the
Holders not consenting.  Nothing in this Section 18(a) shall impair the right of
the  Trustee  in its  discretion  to take any  action or omit to take any action
which it deems proper and which is not  inconsistent  with such  direction.  The
Trustee  shall have no duty to take or  refrain  from  taking any action  unless
explicitly required herein.

      (b) The Trustee shall be deemed to have exercised  reasonable  care in the
custody and  preservation  of the Collateral in its possession if the Collateral
is accorded treatment substantially  equivalent to that which other Trustees, in
similar  transactions,  accord similar property in similar situations,  it being
understood that neither the Trustee nor any Holder shall have responsibility for
(a) ascertaining or taking action with respect to calls, conversions, exchanges,
maturities,  tenders or other matters relative to any Collateral, whether or not
the Trustee has or is deemed to have  knowledge of such  matters,  or (b) taking
any  necessary  steps to preserve the rights  against any Person with respect to
any Collateral.

      (c) The Trustee shall not be responsible in any manner  whatsoever for the
correctness of any recitals,  statements,  representations or warranties herein,
all of which are made solely by Pledgor. The Trustee makes no representations as
to the value or condition of the  Collateral or any part  thereof,  or as to the
title of Pledgor thereto or as to the security afforded by this Agreement, or as
to the validity, execution (except the Trustee's own execution), enforceability,
legality  or  sufficiency  of this  Agreement,  and the  Trustee  shall incur no
liability or responsibility in respect of any such matters.

      (d) The Trustee shall have the same rights with respect to any  obligation
secured  hereunder  held by it as any other  secured party and may exercise such
rights as though it were not the  Trustee  hereunder,  and may  accept  deposits
from,  lend  money to,  and  generally  engage in any kind of  banking  or trust
business with Pledgor as if it were not the Trustee.



                                       10
<PAGE>




      (e) For purposes of this  Agreement,  in the performance of the duties and
obligations hereunder the Trustee shall be entitled to the benefits of the terms
and provisions of the Indenture.

      SECTION 20.  Termination.

            Subject  to  Section  23 of this  Agreement,  when  all the  Secured
Obligations have been  indefeasibly paid in full in accordance with the terms of
the Indenture,  this Agreement shall terminate,  and the Trustee shall, upon the
written request and at the expense of Pledgor,  forthwith  assign,  transfer and
deliver,  against  receipt and  without  recourse  to the  Trustee,  such of the
Collateral  as shall not have been sold or  otherwise  applied  pursuant  to the
terms  hereof to or on the order of Pledgor.  Pledgor  agrees to file and record
any and all  necessary or applicable  terminations  or releases  including  Form
UCC-3.


      SECTION 21.  Continuing Security Interest; Transfer of Notes.

            This Agreement  shall create a continuing  security  interest in the
Collateral  and  shall,  unless  otherwise  provided  in the  Indenture  or this
Agreement,  (a) remain in full force and effect  until  indefeasible  payment in
full is made of all  Secured  Obligations  in  accordance  with the terms of the
Indenture,  (b) be binding upon Pledgor,  its  successors  and assigns,  and (c)
inure,  together with the rights and remedies of the Trustee  hereunder,  to the
benefit of the  Trustee,  the Holders and each of their  respective  successors,
transferees and assigns.

      SECTION 22.  Separability Clause.

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

      SECTION 23.  Reinstatement.

            This Agreement shall continue to be effective or be reinstated if at
any time any  amount  received  by the  Trustee  or any Holder in respect of the
Secured  Obligations  is rescinded or must  otherwise be restored or returned by
the  Trustee  or  any  Holder  upon  the  insolvency,  bankruptcy,  dissolution,
liquidation  or  reorganization  of  Pledgor  or  upon  the  appointment  of any
receiver,  intervenor,  conservator,  trustee or similar official for Pledgor or
any substantial  part of its assets,  or otherwise,  all as though such payments
had not been made.

      SECTION 24.  Governing Law; Terms.

            This  Agreement  shall be governed by, and  construed in  accordance
with,  the laws of the State of New York except to the extent that the  validity
or perfection of the security  interest  hereunder,  or remedies  hereunder,  in
respect of any particular  Collateral are governed by the laws of a jurisdiction


                                       11
<PAGE>




other  than the State of New York.  Unless  otherwise  defined  herein or in the
Indenture,  terms  defined in  Article 9 of the  Uniform  Commercial  Code as in
effect in the State of Maryland are used herein as therein defined.

      SECTION 25.  Counterparts.

            This Agreement may be signed in any number of counterparts  with the
same  effect  as if  the  signature  thereto  and  hereto  were  upon  the  same
instrument.



















                                       12
<PAGE>




      IN  WITNESS  WHEREOF,  Pledgor  and the  Trustee  have  each  caused  this
Agreement  to be duly  executed  and  delivered  by its officer  thereunto  duly
authorized as of the date first above written.






                                    PLEDGOR:

                                    NORTH AMERICAN VACCINE, INC.


                                    By:/s/ Daniel J. Abdun-Nabi
                                       ---------------------------------
                                       Daniel J. Abdun-Nabi, Senior Vice
                                            President-Legal Affairs




                                    By:/s/ Lawrence J. Hineline
                                       -------------------------------------
                                       Lawrence J. Hineline, Vice President-
                                            Finance






                                     TRUSTEE:

                                     BANKERS TRUST COMPANY,
                                        as Trustee


                                     By:/s/ Ednora G. Linares
                                        --------------------------------
                                        Title: Assistant Vice President

                                     Four Albany Street
                                     New York, New York 10006
                                     Attention: Corporate Trust and Agency
                                                Services


<PAGE>
                                                                        ANNEX A


<TABLE>
<CAPTION>

NORTH AMERICAN VACCINE, INC. AND SUBSIDIARIES
COLLATERAL FOR CONVERTIBLE DEBT OFFERING
AS OF SEPTEMBER 30, 1998

TYPE OF COLLATERAL                      LOCATION                     PAGES    CLASS     ACQUIRED        ACCUMULATED       NET BOOK
                                                                                         VALUE         DEPRECIATION        VALUE
<S>                                     <C>                          <C>      <C>     <C>               <C>             <C>
MANUFACTURING EQUIPMENT                                               1-8       1E    9,838,057.34      6,192,688.99    3,645,368.35
                                                                     41-56      EA    3,771,202.21      1,901,889.35    1,869,312.86
                                        12040 Indian Creek Court     82-88      PE    3,693,886.87      3,673,624.60       20,262.27
                                                                                    ------------------------------------------------
                                        Beltsville, MD                               17,303,146.42     11,768,202.94    5,534,943.48
                                                                                    ------------------------------------------------

                                                                                    ------------------------------------------------
MANUFACTURING EQUIPMENT                 12140 Indian Creek Court      8-14      2E    1,162,376.10        776,796.99      385,579.11
                                                                                    ------------------------------------------------
                                        Beltsville, MD

MANUFACTURING EQUIPMENT                 9000 Virginia Manor Road
                                                                                    ------------------------------------------------
                                        Beltsville, MD               18-20      5E      457,991.65        115,808.51      342,183.14
                                                                                    ------------------------------------------------

OFFICE EQUIPMENT                                                       21       5O      998,040.77        727,319.14      270,721.63
                                                                     22-23      6O       37,207.03          2,916.61       34,290.42
                                                                     57-82      OF    2,760,893.03      2,066,486.00      694,407.03
                                                                                    ------------------------------------------------
                                        Various                                       3,796,140.83      2,796,721.75      999,419.08
                                                                                    ------------------------------------------------

RESEARCH & DEVELOPMENT EQUIPMENT                                     21-22      6E      117,023.29          4,586.96      112,436.33
                                                                     28-38      CE    1,818,154.25      1,594,776.10      223,378.15
                                                                     38-41      DE      728,418.49        346,162.13      382,256.36
                                                                     56-57      ME      259,464.38        164,836.67       94,627.71
                                                                     88-89      SE      171,827.71        138,877.36       32,950.35
Less Truck included in the SE Class $                                  88       SE      (21,580.55)       (21,580.55)              -
                                                                                    ------------------------------------------------
                                        Various                                       3,073,307.57      2,227,658.67      845,648.90
                                                                                    ------------------------------------------------

TOTAL OWNED EQUIPMENT                                                               $25,792,962.57    $17,685,188.86   $8,107,773.71
                                                                                    ================================================

</TABLE>




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