NSTAR/MA
8-K, 2000-03-30
ELECTRIC SERVICES
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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): FEBRUARY 10, 2000

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

                                      NSTAR
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                                    <C>                                  <C>
            MASSACHUSETTS                              1-14768                              04-3466300

    (State or other jurisdiction              (Commission File Number)                   (I.R.S. Employer
  of incorporation or organization)                                                   Identification Number)
</TABLE>



                               800 BOYLSTON STREET
                                BOSTON, MA 02199

          (Address, of principal executive offices, including zip code)



                                 (617) 424-2000

               (Registrant's telephone number including area code)

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


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                                   PAGE 1 OF 3

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ITEM 5.  OTHER EVENTS.

         Exhibits are filed herewith in connection with a Registration Statement
on Form S-3 (File No. 333-94735) filed by NSTAR with the Securities and Exchange
Commission covering Notes issuable by NSTAR under an indenture dated as of
January 12, 2000 between NSTAR and Bank One Trust Company, N.A. The exhibits
attached hereto refer specifically to NSTAR's issuance and sale from time to
time of Notes pursuant to prospectus supplement dated January 28, 2000.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.

         (c)  Exhibits.

         1.1.     Underwriting Agreement between NSTAR and Goldman, Sachs & Co.,
                  dated February 10, 2000.

         4.1.     Form of 8% Note due February 15, 2010.


                                       -2-

<PAGE>   3


                                   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 hereunto duly authorized.

                                      NSTAR

                                      By:  /s/ Robert J. Weafer, Jr.
                                         ---------------------------------------
                                           Name:  Robert J. Weafer, Jr.
                                           Title: Vice President, Controller and
                                                  Chief Accounting Officer

Date:  March 30, 2000

                                       -3-


<PAGE>   1

                                                                     Exhibit 1.1
                                     NSTAR

                                DEBT SECURITIES

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

                             UNDERWRITING AGREEMENT

                                                               February 10, 2000

Goldman, Sachs & Co.,
85 Broad Street,
New York, New York 10004

Ladies and Gentlemen:

         From time to time NSTAR, a Massachusetts voluntary association (the
"Company"), proposes to enter into one or more Pricing Agreements (each a
"Pricing Agreement") in the form of Annex I hereto, with such additions and
deletions as the parties thereto may determine, and, subject to the terms and
conditions stated herein and therein, to issue and sell to the firms named in
Schedule I to the applicable Pricing Agreement (such firms constituting the
"Underwriters" with respect to such Pricing Agreement and the securities
specified therein) certain of its debt securities (the "Securities") specified
in Schedule II to such Pricing Agreement (with respect to such Pricing
Agreement, the "Designated Securities").

         The terms and rights of any particular issuance of Designated
Securities shall be as specified in the Pricing Agreement relating thereto and
in or pursuant to the indenture (the "Indenture") identified in such Pricing
Agreement.

         1. Particular sales of Designated Securities may be made from time to
time to the Underwriters of such Securities, for whom the firms designated as
representatives of the Underwriters of such Securities in the Pricing Agreement
relating thereto will act as representatives (the "Representatives"). The term
"Representatives" also refers to a single firm acting as sole representative of
the Underwriters and to an Underwriter or Underwriters who act without any firm
being designated as its or their representatives. This Underwriting Agreement
shall not be construed as an obligation of the Company to sell any of the
Securities or as an obligation of any of the Underwriters to purchase the
Securities. The obligation of the Company to issue and sell any of the
Securities and the obligation of any of the Underwriters to purchase any of the
Securities shall be evidenced by the Pricing Agreement with respect to the
Designated Securities specified therein. Each Pricing Agreement shall specify
the aggregate prinicpal amount of such Designated Securities, the initial public
offering price of such Designated Securities, the purchase price to the
Underwriters of such Designated Securities, the names of the Underwriters of
such Designated Securities, the names of the Representatives of such
Underwriters and the principal amount of such Designated Securities to be
purchased by each Underwriter and shall set forth the date, time and manner of
delivery of such Designated Securities and payment therefor. The Pricing


<PAGE>   2

Agreement shall also specify (to the extent not set forth in the Indenture and
the registration statement and prospectus with respect thereto) the terms of
such Designated Securities. A Pricing Agreement shall be in the form of an
executed writing (which may be in counterparts), and may be evidenced by an
exchange of telegraphic communications or any other rapid transmission device
designed to produce a written record of communications transmitted. The
obligations of the Underwriters under this Agreement and each Pricing Agreement
shall be several and not joint.

         2. The Company represents and warrants to, and agrees with, each of the
Underwriters that:

                  (a) A registration statement on Form S-3 (File No. 333-94735)
         (the "Initial Registration Statement") in respect of the Securities has
         been filed with the Securities and Exchange Commission (the
         "Commission"); the Initial Registration Statement and any
         post-effective amendment thereto, each in the form heretofore delivered
         or to be delivered to the Representatives and, excluding exhibits to
         the Initial Registration Statement, but including all documents
         incorporated by reference in the prospectus contained therein, to the
         Representatives for each of the other Underwriters, have been declared
         effective by the Commission in such form; other than a registration
         statement, if any, increasing the size of the offering (a "Rule 462(b)
         Registration Statement"), filed pursuant to Rule 462(b) under the
         Securities Act of 1933, as amended (the "Act"), which became effective
         upon filing, no other document with respect to the Initial Registration
         Statement or document incorporated by reference therein has heretofore
         been filed or transmitted for filing with the Commission (other than
         prospectuses filed pursuant to Rule 424(b) of the rules and regulations
         of the Commission under the Act, each in the form heretofore delivered
         to the Representatives); and no stop order suspending the effectiveness
         of the Initial Registration Statement, any post-effective amendment
         thereto or the Rule 462(b) Registration Statement, if any, has been
         issued and no proceeding for that purpose has been initiated or
         threatened by the Commission (any preliminary prospectus included in
         the Initial Registration Statement or filed with the Commission
         pursuant to Rule 424(a) under the Act is hereinafter called a
         "Preliminary Prospectus"; the various parts of the Initial Registration
         Statement, any post-effective amendment thereto and the Rule 462(b)
         Registration Statement, if any, including all exhibits thereto and the
         documents incorporated by reference in the prospectus contained in the
         Initial Registration Statement at the time such part of the Initial
         Registration Statement became effective but excluding Form T-1, each as
         amended at the time such part of the Initial Registration Statement
         became effective or such part of the Rule 462(b) Registration
         Statement, if any, became or hereafter becomes effective, are
         hereinafter collectively called the "Registration Statement"; the
         prospectus relating to the Securities, in the form in which it has most
         recently been filed, or transmitted for filing, with the Commission on
         or prior to the date of this Agreement, being hereinafter called the
         "Prospectus"; any reference herein to any Preliminary Prospectus or the
         Prospectus shall be deemed to refer to and include the documents
         incorporated by reference therein pursuant to the applicable form under
         the Act, as of the date of such Preliminary Prospectus or Prospectus,
         as the case may be; any reference to any amendment or supplement to any
         Preliminary Prospectus or the Prospectus shall be deemed to refer to
         and include any documents filed after the date of such Preliminary
         Prospectus or Prospectus, as the case may be, under the Securities
         Exchange Act of 1934, as amended (the "Exchange Act"), and incorporated
         by reference in such Preliminary Prospectus or Prospectus, as the case
         may be; any reference to any amendment to the Initial Registration
         Statement shall be deemed to refer to and include any annual report of
         the Company filed



<PAGE>   3
         pursuant to Sections 13(a) or 15(d) of the Exchange Act after the
         effective date of the Initial Registration Statement that is
         incorporated by reference in the Registration Statement; and any
         reference to the Prospectus as amended or supplemented shall be deemed
         to refer to the Prospectus as amended or supplemented in relation to
         the applicable Designated Securities in the form in which it is filed
         with the Commission pursuant to Rule 424(b) under the Act in accordance
         with Section 5(a) hereof, including any documents incorporated by
         reference therein as of the date of such filing);

                  (b) The documents incorporated by reference in the Prospectus,
         when they became effective or were filed with the Commission, as the
         case may be, conformed in all material respects to the requirements of
         the Act or the Exchange Act, as applicable, and the rules and
         regulations of the Commission thereunder, and none of such documents
         contained an untrue statement of a material fact or omitted to state a
         material fact required to be stated therein or necessary to make the
         statements therein not misleading; and any further documents so filed
         and incorporated by reference in the Prospectus or any further
         amendment or supplement thereto, when such documents become effective
         or are filed with the Commission, as the case may be, will conform in
         all material respects to the requirements of the Act or the Exchange
         Act, as applicable, and the rules and regulations of the Commission
         thereunder and will not contain an untrue statement of a material fact
         or omit to state a material fact required to be stated therein or
         necessary to make the statements therein not misleading; provided,
         however, that this representation and warranty shall not apply to any
         statements or omissions made in reliance upon and in conformity with
         information furnished in writing to the Company by an Underwriter of
         Designated Securities through the Representatives expressly for use in
         the Prospectus as amended or supplemented relating to such Securities;

                  (c) The Registration Statement and the Prospectus conform, and
         any further amendments or supplements to the Registration Statement or
         the Prospectus will conform, in all material respects to the
         requirements of the Act and the Trust Indenture Act of 1939, as amended
         (the "Trust Indenture Act") and the rules and regulations of the
         Commission thereunder and do not and will not, as of the applicable
         effective date as to the Registration Statement and any amendment
         thereto and as of the applicable filing date as to the Prospectus and
         any amendment or supplement thereto, contain an untrue statement of a
         material fact or omit to state a material fact required to be stated
         therein or necessary to make the statements therein not misleading;
         provided, however, that this representation and warranty shall not
         apply to any statements or omissions made in reliance upon and in
         conformity with information furnished in writing to the Company by an
         Underwriter of Designated Securities through the Representatives
         expressly for use in the Prospectus as amended or supplemented relating
         to such Securities;

                  (d) Neither the Company nor any of its subsidiaries has
         sustained since the date of the latest audited financial statements
         included or incorporated by reference in the Prospectus any material
         loss or interference with its business from fire, explosion, flood or
         other calamity, whether or not covered by insurance, or from any labor
         dispute or court or governmental action, order or decree, otherwise
         than as set forth or contemplated in the Prospectus; and, since the
         respective dates as of which information is given in the Registration
         Statement and the Prospectus, there has not been any change in the
         capital stock or long-term debt of the Company or any of its
         subsidiaries or any material adverse change, or any development
         involving a prospective material adverse change, in or



<PAGE>   4

         affecting the general affairs, management, financial position,
         shareholders' equity or results of operations of the Company and its
         subsidiaries, otherwise than as set forth or contemplated in the
         Prospectus;

                  (e) The Company has been duly organized and is lawfully
         existing as a voluntary association under Chapter 182 of the General
         Laws of the Commonwealth of Massachusetts, with power and authority to
         own its properties and conduct its business as described in the
         Prospectus;

                  (f) The Company has an authorized capitalization as set forth
         in the Prospectus, and all of the issued shares of beneficial interest
         of the Company have been duly and validly authorized and issued and are
         fully paid and non-assessable;

                  (g) The Securities have been duly authorized, and, when
         Designated Securities are issued and delivered pursuant to this
         Agreement and the Pricing Agreement with respect to such Designated
         Securities, such Designated Securities will have been duly executed,
         authenticated, issued and delivered and will constitute valid and
         legally binding obligations of the Company entitled to the benefits
         provided by the Indenture, which will be substantially in the form
         filed as an exhibit to the Registration Statement; the Indenture has
         been duly authorized and duly qualified under the Trust Indenture Act
         and, at the Time of Delivery for such Designated Securities (as defined
         in Section 4 hereof), the Indenture will constitute a valid and legally
         binding instrument, enforceable in accordance with its terms, subject,
         as to enforcement, to bankruptcy, insolvency, reorganization,
         moratorium and other laws of general applicability relating to or
         affecting creditors' rights and to general equity principles; and the
         Indenture conforms, and the Designated Securities will conform, to the
         descriptions thereof contained in the Prospectus as amended or
         supplemented with respect to such Designated Securities;

                  (h) The issue and sale of the Securities and the compliance by
         the Company with all of the provisions of the Securities, the
         Indenture, this Agreement and any Pricing Agreement, and the
         consummation of the transactions herein and therein contemplated, will
         not conflict with or result in a breach or violation of any of the
         terms or provisions of, or constitute a default under, any indenture,
         mortgage, deed of trust, loan agreement or other agreement or
         instrument to which the Company is a party or by which the Company is
         bound or to which any of the property or assets of the Company is
         subject, nor will such action result in any violation of the provisions
         of the Declaration of Trust or By-laws of the Company or any statute or
         any order, rule or regulation of any court or governmental agency or
         body having jurisdiction over the Company or any of its properties; and
         no consent, approval, authorization, order, registration or
         qualification of or with any such court or governmental agency or body
         is required for the issue and sale of the Securities or the
         consummation by the Company of the transactions contemplated by this
         Agreement or any Pricing Agreement or the Indenture, except such as
         have been, or will have been prior to the Time of Delivery, obtained
         under the Act and the Trust Indenture Act and such consents, approvals,
         authorizations, registrations or qualifications as may be required
         under state securities or Blue Sky laws in connection with the purchase
         and distribution of the Securities by the Underwriters;

                  (i) Neither the Company nor any of its subsidiaries is in
         violation of its Declaration of Trust, Articles of Organization or
         By-laws or in default in the performance or observance of any material
         obligation, agreement, covenant or condition contained in any


<PAGE>   5

         indenture, mortgage, deed of trust, loan agreement, lease or other
         agreement or instrument to which it is a party or by which it or any of
         its properties may be bound;

                  (j) Other than as set forth in the Prospectus, there are no
         legal or governmental proceedings pending to which the Company or any
         of its subsidiaries is a party or of which any property of the Company
         or any of its subsidiaries is the subject which, if determined
         adversely to the Company or any of its subsidiaries, would individually
         or in the aggregate have a material adverse effect on the current or
         future consolidated financial position, shareholders' equity or results
         of operations of the Company and its subsidiaries; and, to the best of
         the Company's knowledge, no such proceedings are threatened or
         contemplated by governmental authorities or threatened by others;

                  (k) The Company has received an order from the Commission
         pursuant to the Public Utility Holding Company Act of 1935 (the "1935
         Act") that it is exempt from all of the provisions of the 1935 Act
         except Section 9(a)(2) thereof;

                  (l) The Company is not and, after giving effect to the
         offering and sale of the Securities, will not be an "investment
         company", as such term is defined in the Investment Company Act of
         1940, as amended (the "Investment Company Act"); and

                  (m) PricewaterhouseCoopers LLP, who have certified certain
         financial statements of the Company and its subsidiaries, and Arthur
         Andersen LLP, who have certified certain financial statements of
         Commonwealth Energy System, a Massachusetts voluntary association
         ("Commonwealth Energy"), are each independent public accountants as
         required by the Act and the rules and regulations of the Commission
         thereunder.

         3. Upon the execution of the Pricing Agreement applicable to any
Designated Securities and authorization by the Representatives of the release of
such Designated Securities, the several Underwriters propose to offer such
Designated Securities for sale upon the terms and conditions set forth in the
Prospectus as amended or supplemented.

         4. Designated Securities to be purchased by each Underwriter pursuant
to the Pricing Agreement relating thereto, in the form specified in such Pricing
Agreement, and in such authorized denominations and registered in such names as
the Representatives may request upon at least forty-eight hours' prior notice to
the Company, shall be delivered by or on behalf of the Company to the
Representatives for the account of such Underwriter, against payment by such
Underwriter or on its behalf of the purchase price therefor by wire transfer of
Federal (same-day) funds to the account specified by the Company to the
Representatives at least forty-eight hours in advance or at such other place and
time and date as the Representatives and the Company may agree upon in writing,
such time and date being herein called the "Time of Delivery" for such
Securities.

         5. The Company agrees with each of the Underwriters of any Designated
Securities:

                  (a) To prepare the Prospectus as amended or supplemented in
         relation to the applicable Designated Securities in a form approved by
         the Representatives and to file such Prospectus pursuant to Rule 424(b)
         under the Act not later than the Commission's close of business on the
         second business day following the execution and delivery of the Pricing
         Agreement relating to the applicable Designated Securities or, if
         applicable, such earlier time as may be required by Rule 424(b); to
         make no further amendment or any supplement to the Registration
         Statement or Prospectus as amended or supplemented after the date of
         the Pricing Agreement relating to such Securities and prior to the Time
         of Delivery for such Securities which shall be disapproved by the
         Representatives for such Securities



<PAGE>   6
         promptly after reasonable notice thereof; to advise the Representatives
         promptly of any such amendment or supplement after such Time of
         Delivery and furnish the Representatives with copies thereof; to file
         promptly all reports and any definitive proxy or information statements
         required to be filed by the Company with the Commission pursuant to
         Section 13(a), 13(c), 14 or 15(d) of the Exchange Act for so long as
         the delivery of a prospectus is required in connection with the
         offering or sale of such Securities, and during such same period to
         advise the Representatives, promptly after it receives notice thereof,
         of the time when any amendment to the Registration Statement has been
         filed or becomes effective or any supplement to the Prospectus or any
         amended Prospectus has been filed with the Commission, of the issuance
         by the Commission of any stop order or of any order preventing or
         suspending the use of any prospectus relating to the Securities, of the
         suspension of the qualification of such Securities for offering or sale
         in any jurisdiction, of the initiation or threatening of any proceeding
         for any such purpose, or of any request by the Commission for the
         amending or supplementing of the Registration Statement or Prospectus
         or for additional information; and, in the event of the issuance of any
         such stop order or of any such order preventing or suspending the use
         of any prospectus relating to the Securities or suspending any such
         qualification, to promptly use its best efforts to obtain the
         withdrawal of such order;

                  (b) Promptly from time to time to take such action as the
         Representatives may reasonably request to qualify such Securities for
         offering and sale under the securities laws of such jurisdictions as
         the Representatives may request and to comply with such laws so as to
         permit the continuance of sales and dealings therein in such
         jurisdictions for as long as may be necessary to complete the
         distribution of such Securities, provided that in connection therewith
         the Company shall not be required to qualify as a foreign corporation
         or to file a general consent to service of process in any jurisdiction;

                  (c) Prior to 10:00 a.m., New York City time, on the New York
         Business Day next succeeding the date of this Agreement and from time
         to time, to furnish the Underwriters with copies of the Prospectus as
         amended or supplemented in New York City in such quantities as the
         Representatives may reasonably request, and, if the delivery of a
         prospectus is required at any time in connection with the offering or
         sale of the Securities and if at such time any event shall have
         occurred as a result of which the Prospectus as then amended or
         supplemented would include an untrue statement of a material fact or
         omit to state any material fact necessary in order to make the
         statements therein, in the light of the circumstances under which they
         were made when such Prospectus is delivered, not misleading, or, if for
         any other reason it shall be necessary during such same period to amend
         or supplement the Prospectus or to file under the Exchange Act any
         document incorporated by reference in the Prospectus in order to comply
         with the Act, the Exchange Act or the Trust Indenture Act, to notify
         the Representatives and upon their request to file such document and to
         prepare and furnish without charge to each Underwriter and to any
         dealer in securities as many copies as the Representatives may from
         time to time reasonably request of an amended Prospectus or a
         supplement to the Prospectus which will correct such statement or
         omission or effect such compliance;

                  (d) To make generally available to its securityholders as soon
         as practicable, but in any event not later than eighteen months after
         the effective date of the Registration Statement (as defined in Rule
         158(c) under the Act), an earnings statement of the Company and its
         subsidiaries (which need not be audited) complying with Section 11(a)
         of


<PAGE>   7

         the Act and the rules and regulations of the Commission thereunder
         (including, at the option of the Company, Rule 158);

                  (e) During the period beginning from the date of the Pricing
         Agreement for such Designated Securities and continuing to and
         including the later of (i) the seventh day following the date of the
         Pricing Agreement for such Designated Securities and (ii) the Time of
         Delivery for such Designated Securities, not to offer, sell, contract
         to sell or otherwise dispose of any debt securities of the Company
         which mature more than one year after such Time of Delivery and which
         are substantially similar to such Designated Securities, without the
         prior written consent of the Representatives; and

                  (f) If the Company elects to rely upon Rule 462(b), the
         Company shall file a Rule 462(b) Registration Statement with the
         Commission in compliance with Rule 462(b) by 10:00 P.M., Washington,
         D.C. time, on the date of this Agreement, and the Company shall at the
         time of filing either pay to the Commission the filing fee for the Rule
         462(b) Registration Statement or give irrevocable instructions for the
         payment of such fee pursuant to Rule 111(b) under the Act.

         6. The Company covenants and agrees with the several Underwriters that
the Company will pay or cause to be paid the following: (i) the fees,
disbursements and expenses of the Company's counsel and accountants in
connection with the registration of the Securities under the Act and all other
expenses in connection with the preparation, printing and filing of the
Registration Statement, any Preliminary Prospectus and the Prospectus and
amendments and supplements thereto and the mailing and delivering of copies
thereof to the Underwriters and dealers; (ii) the cost of printing or producing
any Agreement among Underwriters, this Agreement, any Pricing Agreement, any
Indenture, any Blue Sky and Legal Investment Memoranda, closing documents
(including any compilations thereof) and any other documents in connection with
the offering, purchase, sale and delivery of the Securities; (iii) all expenses
in connection with the qualification of the Securities for offering and sale
under state securities laws as provided in Section 5(b) hereof, including the
fees and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky and Legal Investment Surveys;
(iv) any fees charged by securities rating services for rating the Securities;
(v) any filing fees incident to, and the fees and disbursements of counsel for
the Underwriters in connection with, any required review by the National
Association of Securities Dealers, Inc. of the terms of the sale of the
Securities; (vi) the cost of preparing the Securities; (vii) the fees and
expenses of any Trustee and any agent of any Trustee and the fees and
disbursements of counsel for any Trustee in connection with any Indenture and
the Securities; and (viii) all other costs and expenses incident to the
performance of its obligations hereunder which are not otherwise specifically
provided for in this Section. It is understood, however, that, except as
provided in this Section, and Sections 8 and 11 hereof, the Underwriters will
pay all of their own costs and expenses, including the fees of their counsel,
transfer taxes on resale of any of the Securities by them, and any advertising
expenses connected with any offers they may make.

         7. The obligations of the Underwriters of any Designated Securities
under the Pricing Agreement relating to such Designated Securities shall be
subject, in the discretion of the Representatives, to the condition that all
representations and warranties and other statements of the Company in or
incorporated by reference in the Pricing Agreement relating to such Designated
Securities are, at and as of the Time of Delivery for such Designated
Securities, true and correct, the condition that the Company shall have
performed all of its obligations hereunder theretofore to be performed, and the
following additional conditions:





<PAGE>   8

                  (a) The Prospectus as amended or supplemented in relation to
         the applicable Designated Securities shall have been filed with the
         Commission pursuant to Rule 424(b) within the applicable time period
         prescribed for such filing by the rules and regulations under the Act
         and in accordance with Section 5(a) hereof; if the Company has elected
         to rely upon Rule 462(b), the Rule 462(b) Registration Statement shall
         have become effective by 10:00 P.M., Washington, D.C. time, on the date
         of this Agreement; no stop order suspending the effectiveness of the
         Registration Statement or any part thereof shall have been issued and
         no proceeding for that purpose shall have been initiated or threatened
         by the Commission; and all requests for additional information on the
         part of the Commission shall have been complied with to the
         Representatives' reasonable satisfaction;

                  (b) Counsel for the Underwriters shall have furnished to the
         Representatives such written opinion or opinions (a draft of each such
         opinion is attached as Annex III(a) hereto), dated the Time of Delivery
         for such Designated Securities, with respect to the organization of the
         Company, the validity of the Indenture, the Designated Securities, the
         Registration Statement, the Prospectus as amended or supplemented and
         such other related matters as the Representatives may reasonably
         request, and such counsel shall have received such papers and
         information as they may reasonably request to enable them to pass upon
         such matters;

                  (c) One or more counsel for the Company satisfactory to the
         Representatives shall have furnished to the Representatives their
         written opinion (a draft of each such opinion is attached as Annex
         III(b) hereto), dated the Time of Delivery for such Designated
         Securities, in form and substance reasonably satisfactory to the
         Representatives, to the effect that:

                           (i) The Company has been duly organized and is
                  lawfully existing as a voluntary association under Chapter 182
                  of the General Laws of the Commonwealth of Massachusetts, with
                  power and authority to own its properties and conduct its
                  business as described in the Prospectus as amended or
                  supplemented;

                           (ii) This Agreement and the Pricing Agreement with
                  respect to the Designated Securities have been duly
                  authorized, executed and delivered by the Company;

                           (iii) The Designated Securities have been duly
                  authorized, executed, authenticated, issued and delivered and
                  constitute valid and legally binding obligations of the
                  Company entitled to the benefits provided by the Indenture;
                  and the Designated Securities and the Indenture conform to the
                  descriptions thereof in the Prospectus as amended or
                  supplemented;

                           (iv) The Indenture has been duly authorized, executed
                  and delivered by the Company and constitutes a valid and
                  legally binding instrument, enforceable in accordance with its
                  terms, subject, as to enforcement, to bankruptcy, insolvency,
                  reorganization, moratorium and other laws of general
                  applicability relating to or affecting creditors' rights and
                  to general equity principles; and the Indenture has been duly
                  qualified under the Trust Indenture Act;

                           (v) The issue and sale of the Designated Securities
                  and the compliance by the Company with all of the provisions
                  of the Designated Securities, the Indenture, this Agreement
                  and the Pricing Agreement with respect to the


<PAGE>   9

                  Designated Securities and the consummation of the transactions
                  herein and therein contemplated will not conflict with or
                  result in a breach or violation of any of the terms or
                  provisions of, or constitute a default under, any indenture,
                  mortgage, deed of trust, loan agreement or other agreement or
                  instrument known to such counsel to which the Company is a
                  party or by which the Company is bound or to which any of the
                  property or assets of the Company is subject, nor will such
                  actions result in any violation of the provisions of the
                  Declaration of Trust or By-laws of the Company or any statute
                  or any order, rule or regulation known to such counsel of any
                  court or governmental agency or body having jurisdiction over
                  the Company or any of its properties;

                           (vi) No consent, approval, authorization, order,
                  registration or qualification of or with any such court or
                  governmental agency or body is required for the issue and sale
                  of the Designated Securities or the consummation by the
                  Company of the transactions contemplated by this Agreement or
                  such Pricing Agreement or the Indenture, except such as have
                  been obtained under the Act and the Trust Indenture Act and
                  such consents, approvals, authorizations, orders,
                  registrations or qualifications as may be required under state
                  securities or Blue Sky laws in connection with the purchase
                  and distribution of the Designated Securities by the
                  Underwriters;

                           (vii) The statements set forth in the Prospectus
                  under the captions "Description of Debt Securities" and
                  "Global Securities", insofar as they purport to constitute a
                  summary of the terms of the Securities and under the caption
                  "Plan of Distribution", insofar as they purport to describe
                  matters of law and legal conclusions, are accurate and fair;

                           (viii) The Company is not an "investment company", as
                  such term is defined in the Investment Company Act;

                           (ix) The Company has received an order from the
                  Commission pursuant to the 1935 Act that it is exempt from all
                  of the provisions of the 1935 Act except Section 9(a)(2)
                  thereof; and

                           (xi) The Registration Statement and the Prospectus as
                  amended or supplemented and any further amendments and
                  supplements thereto made by the Company prior to the Time of
                  Delivery for the Designated Securities (other than the
                  financial statements and related schedules therein, as to
                  which such counsel need express no opinion) comply as to form
                  in all material respects with the requirements of the Act and
                  the Trust Indenture Act and the rules and regulations
                  thereunder; although they do not assume any responsibility for
                  the accuracy, completeness or fairness of the statements
                  contained in the Registration Statement or the Prospectus,
                  except to the extent referred to in the opinion in subsection
                  (viii) of this Section 7(c), they have no reason to believe
                  (A) that, as of its effective date, the Registration Statement
                  or any further amendment thereto made by the Company prior to
                  the Time of Delivery (other than the financial statements and
                  related schedules therein, as to which such counsel need
                  express no opinion) contained an untrue statement of a
                  material fact or omitted to state a material fact required to
                  be stated therein or necessary to make the statements therein
                  not misleading or (B) that, as of its date, the Prospectus as
                  amended or supplemented or any further


<PAGE>   10
                  amendment or supplement thereto made by the Company prior to
                  the Time of Delivery (other than the financial statements and
                  related schedules therein, as to which such counsel need
                  express no opinion) contained an untrue statement of a
                  material fact or omitted to state a material fact necessary to
                  make the statements therein, in the light of the circumstances
                  under which they were made, not misleading or (C) that, as of
                  the Time of Delivery, either the Registration Statement or the
                  Prospectus as amended or supplemented or any further amendment
                  or supplement thereto made by the Company prior to the Time of
                  Delivery (other than the financial statements and related
                  schedules therein, as to which such counsel need express no
                  opinion) contains an untrue statement of a material fact or
                  omits to state a material fact necessary to make the
                  statements therein, in the light of the circumstances under
                  which they were made, not misleading; and they do not know of
                  any amendment to the Registration Statement required to be
                  filed or any contracts or other documents of a character
                  required to be filed as an exhibit to the Registration
                  Statement or required to be incorporated by reference into the
                  Prospectus as amended or supplemented or required to be
                  described in the Registration Statement or the Prospectus as
                  amended or supplemented which are not filed or incorporated by
                  reference or described as required;

                  (d) On the date of the Pricing Agreement for such Designated
         Securities at a time prior to the execution of the Pricing Agreement
         with respect to such Designated Securities and at the Time of Delivery
         for such Designated Securities, (i) the independent accountants of the
         Company who have certified the financial statements of the Company and
         its subsidiaries included or incorporated by reference in the
         Registration Statement shall have furnished to the Representatives a
         letter, dated the effective date of the Registration Statement or the
         date of the most recent report filed with the Commission containing
         financial statements and incorporated by reference in the Registration
         Statement, if the date of such report is later than such effective
         date, and a letter dated such Time of Delivery, respectively, to the
         effect set forth in Annex II(a) hereto, and with respect to such letter
         dated such Time of Delivery, as to such other matters as the
         Representatives may reasonably request and in form and substance
         satisfactory to the Representatives (the executed copy of the letter
         delivered prior to the execution of this Agreement is attached as Annex
         I(a) hereto and a draft of the form of letter to be delivered on the
         effective date of any post-effective amendment to the Registration
         Statement and as of each Time of Delivery is attached as Annex I(b)
         hereto), and (ii) the independent accountants of Commonwealth Energy
         who have certified the financial statements of Commonwealth Energy and
         its subsidiaries included or incorporated by reference in the
         Registration Statement shall have furnished to the Representatives a
         letter, dated the effective date of the Registration Statement or the
         date of the most recent report filed with the Commission containing
         financial statements and incorporated by reference in the Registration
         Statement, if the date of such report is later than such effective
         date, and a letter dated such Time of Delivery, respectively, to the
         effect set forth in Annex II(b) hereto, and with respect to such letter
         dated such Time of Delivery, as to such other matters as the
         Representatives may reasonably request and in form and substance
         satisfactory to the Representatives (the executed copy of the letter
         delivered prior to the execution of this Agreement is attached as Annex
         I(c) hereto and a draft of the form of letter to be delivered on the
         effective date of any post-effective amendment to the Registration
         Statement and as of each Time of Delivery is attached as Annex I(d)
         hereto);


<PAGE>   11

                  (e) (i) Neither the Company nor any of its subsidiaries shall
         have sustained since the date of the latest audited financial
         statements included or incorporated by reference in the Prospectus as
         amended prior to the date of the Pricing Agreement relating to the
         Designated Securities any loss or interference with its business from
         fire, explosion, flood or other calamity, whether or not covered by
         insurance, or from any labor dispute or court or governmental action,
         order or decree, otherwise than as set forth or contemplated in the
         Prospectus as amended prior to the date of the Pricing Agreement
         relating to the Designated Securities, and (ii) since the respective
         dates as of which information is given in the Prospectus as amended
         prior to the date of the Pricing Agreement relating to the Designated
         Securities there shall not have been any change in the capital stock or
         long-term debt of the Company or any of its subsidiaries or any change,
         or any development involving a prospective change, in or affecting the
         general affairs, management, financial position, shareholders' equity
         or results of operations of the Company and its subsidiaries, otherwise
         than as set forth or contemplated in the Prospectus as amended prior to
         the date of the Pricing Agreement relating to the Designated
         Securities, the effect of which, in any such case described in clause
         (i) or (ii), is in the judgment of the Representatives so material and
         adverse as to make it impracticable or inadvisable to proceed with the
         public offering or the delivery of the Designated Securities on the
         terms and in the manner contemplated in the Prospectus as first amended
         or supplemented relating to the Designated Securities;

                  (f) On or after the date of the Pricing Agreement relating to
         the Designated Securities (i) no downgrading shall have occurred in the
         rating accorded the Company's debt securities or preferred stock by any
         "nationally recognized statistical rating organization", as that term
         is defined by the Commission for purposes of Rule 436(g)(2) under the
         Act, and (ii) no such organization shall have publicly announced that
         it has under surveillance or review, with possible negative
         implications, its rating of any of the Company's debt securities or
         preferred stock;

                  (g) On or after the date of the Pricing Agreement relating to
         the Designated Securities there shall not have occurred any of the
         following: (i) a suspension or material limitation in trading in
         securities generally on the New York Stock Exchange; (ii) a suspension
         or material limitation in trading in the Company's securities on the
         New York Stock Exchange; (iii) a general moratorium on commercial
         banking activities declared by either Federal or New York State
         authorities; or (iv) the outbreak or escalation of hostilities
         involving the United States or the declaration by the United States of
         a national emergency or war, if the effect of any such event specified
         in this clause (iv) in the judgment of the Representatives makes it
         impracticable or inadvisable to proceed with the public offering or the
         delivery of the Designated Securities on the terms and in the manner
         contemplated in the Prospectus as first amended or supplemented
         relating to the Designated Securities;

                  (h) The Company shall have complied with the provisions of
         Section 5(c) hereof with respect to the furnishing of prospectuses on
         the New York Business Day next succeeding the date of this Agreement;
         and

                  (i) The Company shall have furnished or caused to be furnished
         to the Representatives at the Time of Delivery for the Designated
         Securities a certificate or certificates of officers of the Company
         satisfactory to the Representatives as to the accuracy of the
         representations and warranties of the Company herein at and as of such
         Time of Delivery, as to the performance by the Company of all of its
         obligations hereunder


<PAGE>   12

         to be performed at or prior to such Time of Delivery, as to the matters
         set forth in subsections (a) and (e) of this Section and as to such
         other matters as the Representatives may reasonably request.

         8. (a) The Company will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon an untrue statement or alleged untrue statement of a
material fact contained in any Preliminary Prospectus, any preliminary
prospectus supplement, the Registration Statement, the Prospectus as amended or
supplemented and any other prospectus relating to the Securities, or any
amendment or supplement thereto, or arise out of or are based upon the omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, and will
reimburse each Underwriter for any legal or other expenses reasonably incurred
by such Underwriter in connection with investigating or defending any such
action or claim as such expenses are incurred; provided, however, that the
Company shall not be liable in any such case to the extent that any such loss,
claim, damage or liability arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in any Preliminary
Prospectus, any preliminary prospectus supplement, the Registration Statement,
the Prospectus as amended or supplemented and any other prospectus relating to
the Securities, or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
of Designated Securities through the Representatives expressly for use in the
Prospectus as amended or supplemented relating to such Securities.

         (b) Each Underwriter will indemnify and hold harmless the Company
against any losses, claims, damages or liabilities to which the Company may
become subject, under the Act or otherwise, insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are based
upon an untrue statement or alleged untrue statement of a material fact
contained in any Preliminary Prospectus, any preliminary prospectus supplement,
the Registration Statement, the Prospectus as amended or supplemented and any
other prospectus relating to the Securities, or any amendment or supplement
thereto, or arise out of or are based upon the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, in each case to the extent, but only to
the extent, that such untrue statement or alleged untrue statement or omission
or alleged omission was made in any Preliminary Prospectus, any preliminary
prospectus supplement, the Registration Statement, the Prospectus as amended or
supplemented and any other prospectus relating to the Securities, or any such
amendment or supplement in reliance upon and in conformity with written
information furnished to the Company by such Underwriter through the
Representatives expressly for use therein; and will reimburse the Company for
any legal or other expenses reasonably incurred by the Company in connection
with investigating or defending any such action or claim as such expenses are
incurred.

         (c) Promptly after receipt by an indemnified party under subsection (a)
or (b) above of notice of the commeall, if a claim in respect thereof is to be
made against the indemnifying party under such subsection, notify the
indemnifying party in writing of the commencement thereof; but the omission so
to notify the indemnifying party shall not relieve it from any liability which
it may have to any indemnified party otherwise than under such subsection. In
case any such action shall be brought against any indemnified party and it shall
notify the indemnifying party of the commencement thereof, the indemnifying
party shall be


<PAGE>   13

entitled to participate therein and, to the extent that it shall wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel satisfactory to such indemnified party (who shall not,
except with the consent of the indemnified party, be counsel to the indemnifying
party), and, after notice from the indemnifying party to such indemnified party
of its election so to assume the defense thereof, the indemnifying party shall
not be liable to such indemnified party under such subsection for any legal
expenses of other counsel or any other expenses, in each case subsequently
incurred by such indemnified party, in connection with the defense thereof other
than reasonable costs of investigation. No indemnifying party shall, without the
written consent of the indemnified party, effect the settlement or compromise
of, or consent to the entry of any judgment with respect to, any pending or
threatened action or claim in respect of which indemnification or contribution
may be sought hereunder (whether or not the indemnified party is an actual or
potential party to such action or claim) unless such settlement, compromise or
judgment (i) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (ii) does not include a
statement as to or an admission of fault, culpability or a failure to act, by or
on behalf of any indemnified party. The indemnifying party shall not be required
to indemnify an Indmnified Party for any amount paid or payable in the
settlement or compromise of any action, proceeding or investigation effected
without its written consent, which consent shall not be unreasonably withheld.

         (d) Notwithstanding any other provision of this Agreement, no indemnity
by the Company hereunder shall apply in respect of (i) any Preliminary
Prospectus or Prospectus used by an Underwriter or securities dealer at a time
not authorized under the Act, (ii) any Preliminary Prospectus furnished to a
person to whom any of the Designated Securities are sold unless a copy of the
Prospectus is furnished by an Underwriter or securities dealer to such person at
or prior to the written confirmation of such sale or mailed to such person with
such confirmation (unless such failure to deliver the Prospectus is because of
noncompliance by the Company with Section 5(c) hereof) or (iii) any Preliminary
Prospectus or Prospectus used by an Underwriter or securities dealer after the
same has been superseded by an amended, supplemented or revised Preliminary
Prospectus or Prospectus, as the case may be, supplied by the Company to the
Representatives for the use of the Underwriters; PROVIDED, HOWEVER, that (A)
this subsection (d) shall not apply in the case of occurrences listed in (ii) or
(iii) above if the untrue statement or alleged untrue statement of a material
fact or the omission or alleged omission to state a material fact required to be
stated or necessary to make the statements not misleading which has been alleged
as the basis of liability for which indemnity is sought has not been corrected
in the Prospectus (in the case of (ii) above) or in the amended, supplemented or
revised Preliminary Prospectus or Prospectus (in the case of (iii) above) and
(B) for purposes of (ii) and (iii) above, the terms "Preliminary Prospectus" and
"Prospectus" shall not include the documents or information incorporated therein
by reference.

         (e) If the indemnification provided for in this Section 8 is
unavailable to or insufficient to hold harmless an indemnified party under
subsection (a) or (b) above in respect of any losses, claims, damages or
liabilities (or actions in respect thereof) referred to therein, then each
indemnifying party shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities (or
actions in respect thereof) in such proportion as is appropriate to reflect the
relative benefits received by the Company on the one hand and the Underwriters
of the Designated Securities on the other from the offering of the Designated
Securities to which such loss, claim, damage or liability (or action in respect
thereof) relates. If, however, the allocation provided by the immediately
preceding sentence is not permitted by applicable law or if the indemnified
party failed to give the notice required under subsection (c)


<PAGE>   14

above, then each indemnifying party shall contribute to such amount paid or
payable by such indemnified party in such proportion as is appropriate to
reflect not only such relative benefits but also the relative fault of the
Company on the one hand and the Underwriters of the Designated Securities on the
other in connection with the statements or omissions which resulted in such
losses, claims, damages or liabilities (or actions in respect thereof), as well
as any other relevant equitable considerations. The relative benefits received
by the Company on the one hand and such Underwriters on the other shall be
deemed to be in the same proportion as the total net proceeds from such offering
(before deducting expenses) received by the Company bear to the total
underwriting discounts and commissions received by such Underwriters. The
relative fault shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of a material fact or the omate a
material fact relates to information supplied by the Company on the one hand or
such Underwriters on the other and the parties' relative intent, knowledge,
access to information and opportunity to correct or prevent such statement or
omission. The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this subsection (e) were determined by pro
rata allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to above in this subsection (e). The amount
paid or payable by an indemnified party as a result of the losses, claims,
damages or liabilities (or actions in respect thereof) referred to above in this
subsection (e) shall be deemed to include any legal or other expenses reasonably
incurred by such indemnified party in connection with investigating or defending
any such action or claim. Notwithstanding the provisions of this subsection (e),
no Underwriter shall be required to contribute any amount in excess of the
amount by which the total price at which the applicable Designated Securities
underwritten by it and distributed to the public were offered to the public
exceeds the amount of any damages which such Underwriter has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission. No person guilty of fraudulent misrepresentation (within
the meaning of Section 11(f) of the Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. The
obligations of the Underwriters of Designated Securities in this subsection (e)
to contribute are several in proportion to their respective underwriting
obligations with respect to such Securities and not joint.

         (f) The obligations of the Company under this Section 8 shall be in
addition to any liability which the Company may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Act; and the obligations of the
Underwriters under this Section 8 shall be in addition to any liability which
the respective Underwriters may otherwise have and shall extend, upon the same
terms and conditions, to each officer and director of the Company and to each
person, if any, who controls the Company within the meaning of the Act.

         9. (a) If any Underwriter shall default in its obligation to purchase
the Designated Securities which it has agreed to purchase under the Pricing
Agreement relating to such Designated Securities, the Representatives may in
their discretion arrange for themselves or another party or other parties
reasonably satisfactory to the Company to purchase such Designated Securities on
the terms contained herein. If within thirty-six hours after such default by any
Underwriter the Representatives do not arrange for the purchase of such
Designated Securities, then the Company shall be entitled to a further period of
thirty-six hours within which to procure another party or other parties
reasonably satisfactory to the Representatives to purchase such Designated
Securities on such terms. In the event that, within the respective prescribed
period, the Representatives notify the Company that they have so arranged for
the purchase of such


<PAGE>   15
Designated Securities, or the Company notifies the Representatives that it has
so arranged for the purchase of such Designated Securities, the Representatives
or the Company shall have the right to postpone the Time of Delivery for such
Designated Securities for a period of not more than seven days, in order to
effect whatever changes may thereby be made necessary in the Registration
Statement or the Prospectus as amended or supplemented, or in any other
documents or arrangements, and the Company agrees to file promptly any
amendments or supplements to the Registration Statement or the Prospectus which
in the opinion of the Representatives mae term "Underwriter" as used in this
Agreement shall include any person substituted under this Section with like
effect as if such person had originally been a party to the Pricing Agreement
with respect to such Designated Securities.

         (b) If, after giving effect to any arrangements for the purchase of the
Designated Securities of a defaulting Underwriter or Underwriters by the
Representatives and the Company as provided in subsection (a) above, the
aggregate principal amount of such Designated Securities which remains
unpurchased does not exceed one-eleventh of the aggregate principal amount of
the Designated Securities, then the Company shall have the right to require each
non-defaulting Underwriter to purchase the principal amount of Designated
Securities which such Underwriter agreed to purchase under the Pricing Agreement
relating to such Designated Securities and, in addition, to require each
non-defaulting Underwriter to purchase its pro rata share (based on the
principal amount of Designated Securities which such Underwriter agreed to
purchase under such Pricing Agreement) of the Designated Securities of such
defaulting Underwriter or Underwriters for which such arrangements have not been
made; but nothing herein shall relieve a defaulting Underwriter from liability
for its default.

         (c) If, after giving effect to any arrangements for the purchase of the
Designated Securities of a defaulting Underwriter or Underwriters by the
Representatives and the Company as provided in subsection (a) above, the
aggregate principal amount of Designated Securities which remains unpurchased
exceeds one-eleventh of the aggregate principal amount of the Designated
Securities, as referred to in subsection (b) above, or if the Company shall not
exercise the right described in subsection (b) above to require non-defaulting
Underwriters to purchase Designated Securities of a defaulting Underwriter or
Underwriters, then the Pricing Agreement relating to such Designated Securities
shall thereupon terminate, without liability on the part of any non-defaulting
Underwriter or the Company, except for the expenses to be borne by the Company
and the Underwriters as provided in Section 6 hereof and the indemnity and
contribution agreements in Section 8 hereof; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

         10. The respective indemnities, agreements, representations, warranties
and other statements of the Company and the several Underwriters, as set forth
in this Agreement or made by or on behalf of them, respectively, pursuant to
this Agreement, shall remain in full force and effect, regardless of any
investigation (or any statement as to the results thereof) made by or on behalf
of any Underwriter or any controlling person of any Underwriter, or the Company,
or any officer or director or controlling person of the Company, and shall
survive delivery of and payment for the Securities.

         11. If any Pricing Agreement shall be terminated pursuant to Section 9
hereof, the Company shall not then be under any liability to any Underwriter
with respect to the Designated Securities covered by such Pricing Agreement
except as provided in Sections 6 and 8 hereof; but, if for any other reason
Designated Securities are not delivered by or on behalf of the Company as
provided herein, the Company will reimburse the Underwriters through the
Representatives for all


<PAGE>   16

out-of-pocket expenses approved in writing by the Representatives, including
fees and disbursements of counsel, reasonably incurred by the Underwriters in
making preparations for the purchase, sale and delivery of such Designated
Securities, but the Company shall then be under no further liability to any
Underwriter with respect to such Designated Securities except as provided in
Sections 6 and 8 hereof.

         12. In all dealings hereunder, the Representatives of the Underwriters
of Designated Securities shall act on behalf of each of such Underwriters, and
the parties hereto shall be entitled to act and rely upon any statement,
request, notice or agreement on behalf of any Underwriter made or given by such
Representatives jointly or by such of the Representatives, if any, as may be
designated for such purpose in the Pricing Agreement.

         All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to the address of the Representatives as set forth in the
Pricing Agreement; and if to the Company shall be delivered or sent by mail,
telex or facsimile transmission to the address of the Company set forth in the
Registration Statement: Attention: General Counsel, with a copy to Ropes & Gray,
Attention: David A. Fine; provided, however, that any notice to an Underwriter
pursuant to Section 8(c) hereof shall be delivered or sent by mail, telex or
facsimile transmission to such Underwriter at its address set forth in its
Underwriters' Questionnaire, or telex constituting such Questionnaire, which
address will be supplied to the Company by the Representatives upon request. Any
such statements, requests, notices or agreements shall take effect upon receipt
thereof.

         13. This Agreement and each Pricing Agreement shall be binding upon,
and inure solely to the benefit of, the Underwriters, the Company and, to the
extent provided in Sections 8 and 10 hereof, the officers and directors of the
Company and each person who controls the Company or any Underwriter, and their
respective heirs, executors, administrators, successors and assigns, and no
other person shall acquire or have any right under or by virtue of this
Agreement or any such Pricing Agreement. No purchaser of any of the Securities
from any Underwriter shall be deemed a successor or assign by reason merely of
such purchase.

         14. Time shall be of the essence of each Pricing Agreement. As used
herein, "business day" shall mean any day when the Commission's office in
Washington, D.C. is open for business.

         15. THIS AGREEMENT AND EACH PRICING AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE COMMONWEALTH OF MASSACHUSETTS.

         16. This Agreement and each Pricing Agreement may be executed by any
one or more of the parties hereto and thereto in any number of counterparts,
each of which shall be deemed to be an original, but all such respective
counterparts shall together constitute one and the same instrument.



<PAGE>   17

         If the foregoing is in accordance with your understanding, please sign
and return to us counterparts hereof.

                                       Very truly yours,

                                       NSTAR

                                       By: /s/ James J. Judge
                                          -----------------------------------
                                       Name:  James J. Judge
                                       Title: Senior Vice President and Chief
                                              Financial Officer

Accepted as of the date hereof:

Goldman, Sachs & Co.

By: /s/ Goldman, Sachs & Co.
   ----------------------------


<PAGE>   18



                                                                         ANNEX I
                               PRICING AGREEMENT
Goldman, Sachs & Co.,
         As Representatives of the several
                  Underwriters named in Schedule I hereto,
85 Broad Street,
New York, New York 10004.,

                                                                         20..

Ladies and Gentlemen:

         NSTAR, a Massachusetts voluntary association (the "Company"), proposes,
subject to the terms and conditions stated herein and in the Underwriting
Agreement, dated . . . . . . . . . . . ., 20__ (the "Underwriting Agreement"),
between the Company on the one hand and Goldman, Sachs & Co. on the other hand,
to issue and sell to the Underwriters named in Schedule I hereto (the
"Underwriters") the Securities specified in Schedule II hereto (the "Designated
Securities"). Each of the provisions of the Underwriting Agreement is
incorporated herein by reference in its entirety, and shall be deemed to be a
part of this Agreement to the same extent as if such provisions had been set
forth in full herein; and each of the representations and warranties set forth
therein shall be deemed to have been made at and as of the date of this Pricing
Agreement, except that each representation and warranty which refers to the
Prospectus in Section 2 of the Underwriting Agreement shall be deemed to be a
representation or warranty as of the date of the Underwriting Agreement in
relation to the Prospectus (as therein defined), and also a representation and
warranty as of the date of this Pricing Agreement in relation to the Prospectus
as amended or supplemented relating to the Designated Securities which are the
subject of this Pricing Agreement. Each reference to the Representatives herein
and in the provisions of the Underwriting Agreement so incorporated by reference
shall be deemed to refer to you. Unless otherwise defined herein, terms defined
in the Underwriting Agreement are used herein as therein defined. The
Representatives designated to act on behalf of the Representatives and on behalf
of each of the Underwriters of the Designated Securities pursuant to Section 12
of the Underwriting Agreement and the address of the Representatives referred to
in such Section 12 are set forth at the end of Schedule II hereto.

         The Company has reviewed its operations and that of its subsidiaries
and any third parties with which the Company or any of its subsidiaries has a
material relationship to evaluate the extent to which the business or operations
of the Company or any of its subsidiaries has been or will be affected by the
Year 2000 Problem. As a result of such review, the Company has no reason to
believe, and does not believe, that the Year 2000 Problem has had or will have a
material adverse effect on the general affairs, management, the current or
future consolidated financial position, business prospects, shareholders' equity
or results of operations of the Company and its subsidiaries or has resulted or
will result in any material loss or interference with the Company's business or
operations. The "Year 2000 Problem" as used herein means any significant risk
that computer hardware or software used in the receipt, transmission,
processing, manipulation, storage, retrieval, retransmission or other
utilization of data or in the operation of mechanical or electrical systems of
any kind is not functioning or will not function, in the case of dates or time
periods occurring after December 31, 1999, at least as effectively as in the
case of dates or time


<PAGE>   19

periods occurring prior to January 1, 2000.

         An amendment to the Registration Statement, or a supplement to the
Prospectus, as the case may be, relating to the Designated Securities, in the
form heretofore delivered to you is now proposed to be filed with the
Commission.

         Subject to the terms and conditions set forth herein and in the
Underwriting Agreement incorporated herein by reference, the Company agrees to
issue and sell to each of the Underwriters, and each of the Underwriters agrees,
severally and not jointly, to purchase from the Company, at the time and place
and at the purchase price to the Underwriters set forth in Schedule II hereto,
the principal amount of Designated Securities set forth opposite the name of
such Underwriter in Schedule I hereto.

         If the foregoing is in accordance with your understanding, please sign
and return to us counterparts hereof, and upon acceptance hereof by you, on
behalf of each of the Underwriters, this letter and such acceptance hereof,
including the provisions of the Underwriting Agreement incorporated herein by
reference, shall constitute a binding agreement between each of the Underwriters
and the Company. It is understood that your acceptance of this letter on behalf
of each of the Underwriters is or will be pursuant to the authority set forth in
a form of Agreement among Underwriters, the form of which shall be submitted to
the Company for examination upon request, but without warranty on the part of
the Representatives as to the authority of the signers thereof.

                                       Very truly yours,

                                       NSTAR

                                       By:
                                          -----------------------------------
                                       Name:
                                       Title:


Accepted as of the date hereof:

Goldman, Sachs & Co.

By: /s/ Goldman, Sachs & Co.
   ----------------------------
Name:
Title:

         On behalf of each of the Underwriters


<PAGE>   20



                                   SCHEDULE I

                                                                 PRINCIPAL
                                                                 AMOUNT OF
                                                                 DESIGNATED
                                                                 SECURITIES
                                                                   TO BE
               UNDERWRITER                                       PURCHASED
               -----------                                       ---------
Goldman, Sachs & Co.                                             $

[NAMES OF OTHER UNDERWRITERS]

Total                                                            $




<PAGE>   21



                                  SCHEDULE II

TITLE OF DESIGNATED SECURITIES:

       [  %] [Floating Rate] [Zero Coupon] [Notes]
       [Debentures] due                        ,

AGGREGATE PRINCIPAL AMOUNT:

       [$]

PRICE TO PUBLIC:

           % of the principal amount of the Designated Securities, plus accrued
           interest[, if any,] from          to                     [and accrued
           amortization[, if any,] from                 to           ]

PURCHASE PRICE BY UNDERWRITERS:

           % of the principal amount of the Designated Securities, plus accrued
           interest from to          [and accrued amortization[, if any,]
            from                      to                ]

FORM OF DESIGNATED SECURITIES:
       Book-entry only form represented by one or more global securities
       deposited with The Depository Trust Company ("DTC") or its designated
       custodian, to be made available for checking by the Representatives at
       least twenty-four hours prior to the Time of Delivery at the office of
       DTC.

SPECIFIED FUNDS FOR PAYMENT OF PURCHASE PRICE:

       Federal (same day) funds

TIME OF DELIVERY:

         a.m. (New York City time),                      , 20

INDENTURE:

       Indenture dated as of January 12, 2000, between the Company and Bank One
       Trust Company, N.A., as Trustee

MATURITY:

INTEREST RATE:

       [   %] [Zero Coupon] [See Floating Rate Provisions]

INTEREST PAYMENT DATES:

       [months and dates, commencing ....................., 20..]

REDEMPTION PROVISIONS:

       [No provisions for redemption]

       [The Designated Securities may be redeemed, otherwise than through the
       sinking fund, in whole or in part at the option of the Company, in the
       amount of [$ ] or an integral multiple thereof, [on or after , at the
       following redemption prices (expressed in percentages of principal

<PAGE>   22


     amount). If [redeemed on or before , %, and if] redeemed during the
     12-month period beginning ,

<TABLE>
<CAPTION>
                                                  REDEMPTION
                         YEAR                        PRICE
                         ----                        -----
<S>                                               <C>




</TABLE>


     and thereafter at 100% of their principal amount, together in each case
     with accrued interest to the redemption date.]

     [on any interest payment date falling on or after , , at the election of
     the Company, at a redemption price equal to the principal amount thereof,
     plus accrued interest to the date of redemption.]

     [Other possible redemption provisions, such as mandatory redemption upon
     occurrence of certain events or redemption for changes in tax law]

     [Restriction on refunding]

SINKING FUND PROVISIONS:

     No sinking fund provisions

       [If Designated Securities are extendable debt securities, insert--

EXTENDABLE PROVISIONS:

     Designated Securities are repayable on , [insert date and years], at the
     option of the holder, at their principal amount with accrued interest. The
     initial annual interest rate will be %, and thereafter the annual interest
     rate will be adjusted on , and to a rate not less than % of the effective
     annual interest rate on U.S. Treasury obligations with -year maturities as
     of the [insert date 15 days prior to maturity date] prior to such [insert
     maturity date].]

      [If Designated Securities are floating rate debt securities, insert--

FLOATING RATE PROVISIONS:

     Initial annual interest rate will be % through [and thereafter will be
     adjusted [monthly] [on each , , and ] [to an annual rate of % above the
     average rate for -year [month][securities][certificates of deposit] issued
     by and [insert names of banks].] [and the annual interest rate [thereafter]
     [from through ] will be the interest yield equivalent of the weekly average
     per annum market discount rate for -month Treasury bills plus % of Interest
     Differential (the excess, if any, of (i) the then current weekly average
     per annum secondary market yield for -month certificates of deposit over
     (ii) the then current interest yield equivalent of the weekly average per
     annum market discount rate for -month Treasury bills); [from and thereafter
     the rate will be the then current interest yield equivalent plus % of
     Interest Differential].]


<PAGE>   23


DEFEASANCE PROVISIONS:


CLOSING LOCATION FOR DELIVERY OF DESIGNATED SECURITIES:


ADDITIONAL CLOSING CONDITIONS:


NAMES AND ADDRESSES OF REPRESENTATIVES:

     Designated Representatives:

     Address for Notices, etc.:

[OTHER TERMS]:


<PAGE>   24


                                                                     ANNEX II(a)

     Pursuant to Section 7(d) of the Underwriting Agreement, the accountants
shall furnish letters to the Underwriters to the effect that:

          (i) They are independent certified public accountants with respect to
     the Company and its subsidiaries within the meaning of the Act and the
     applicable rules and regulations adopted by the Commission;

          (ii) In their opinion, the financial statements and any supplementary
     financial information and schedules audited (and, if applicable, financial
     forecasts and/or pro forma financial information) examined by them and
     included or incorporated by reference in the Registration Statement or the
     Prospectus comply as to form in all material respects with the applicable
     accounting requirements of the Act or the Exchange Act, as applicable, and
     the related rules and regulations; and, if applicable, they have made a
     review in accordance with standards established by the American Institute
     of Certified Public Accountants of the consolidated interim financial
     statements, selected financial data, pro forma financial information,
     financial forecasts and/or condensed financial statements derived from
     audited financial statements of the Company for the periods specified in
     such letter, as indicated in their reports thereon, copies of which have
     been [SEPARATELY] furnished to the representative or representatives of the
     Underwriters (the "Representatives") such term to include an Underwriter or
     Underwriters who act without any firm being designated as its or their
     representatives [AND ARE ATTACHED TO SUCH LETTERS];

          (iii) They have made a review in accordance with standards established
     by the American Institute of Certified Public Accountants of the unaudited
     condensed consolidated statements of income, consolidated balance sheets
     and consolidated statements of cash flows included in the Prospectus and/or
     included in the Company's quarterly report on Form 10-Q incorporated by
     reference into the Prospectus as indicated in their reports thereon copies
     of which [HAVE BEEN SEPARATELY FURNISHED TO THE REPRESENTATIVES][ARE
     ATTACHED TO SUCH LETTERS]; and on the basis of specified procedures
     including inquiries of officials of the Company who have responsibility for
     financial and accounting matters regarding whether the unaudited condensed
     consolidated financial statements referred to in paragraph (vi)(A)(i) below
     comply as to form in all material respects with the applicable accounting
     requirements of the [ACT AND THE EXCHANGE] Act and the related rules and
     regulations, nothing came to their attention that caused them to believe
     that the unaudited condensed consolidated financial statements do not
     comply as to form in all material respects with the applicable accounting
     requirements of the [ACT AND THE EXCHANGE] Act and the related rules and
     regulations adopted by the Commission;

          (iv) The unaudited selected financial information with respect to the
     consolidated results of operations and financial position of the Company
     for the five most recent fiscal years included in the Prospectus and
     included or incorporated by reference in Item 6 of the Company's Annual
     Report on Form 10-K for the most recent fiscal year agrees with the
     corresponding amounts (after restatement where applicable) in the audited
     consolidated financial statements for five such fiscal years included or
     incorporated by reference in the Company's Annual Reports on Form 10-K for
     such fiscal years;

          (v) They have compared the information in the Prospectus under
     selected captions with the disclosure requirements of Regulation S-K and on
     the basis of limited


<PAGE>   25


     procedures specified in such letter nothing came to their attention as a
     result of the foregoing procedures that caused them to believe that this
     information does not conform in all material respects with the disclosure
     requirements of Items 301, 302, 402 and 503(d), respectively, of Regulation
     S-K;

          (vi) On the basis of limited procedures, not constituting an
     examination in accordance with generally accepted auditing standards,
     consisting of a reading of the unaudited financial statements and other
     information referred to below, a reading of the latest available interim
     financial statements of the Company and its subsidiaries, inspection of the
     minute books of the Company and its subsidiaries since the date of the
     latest audited financial statements included or incorporated by reference
     in the Prospectus, inquiries of officials of the Company and its
     subsidiaries responsible for financial and accounting matters and such
     other inquiries and procedures as may be specified in such letter, nothing
     came to their attention that caused them to believe that:

               (A) (i) the unaudited condensed consolidated statements of
          income, consolidated balance sheets and consolidated statements of
          cash flows included in the Prospectus and/or included or incorporated
          by reference in the Company's Quarterly Reports on Form 10-Q
          incorporated by reference in the Prospectus do not comply as to form
          in all material respects with the applicable accounting requirements
          of the Exchange Act and the published rules and regulations adopted by
          the Commission, or (ii) any material modifications should be made to
          the unaudited condensed consolidated statements of income,
          consolidated balance sheets and consolidated statements of cash flows
          included in the Prospectus or included in the Company's Quarterly
          Reports on Form 10-Q incorporated by reference in the Prospectus for
          them to be in conformity with generally accepted accounting
          principles;

               (B) any other unaudited income statement data and balance sheet
          items included in the Prospectus do not agree with the corresponding
          items in the unaudited consolidated financial statements from which
          such data and items were derived, and any such unaudited data and
          items were not determined on a basis substantially consistent with the
          basis for the corresponding amounts in the audited consolidated
          financial statements included or incorporated by reference in the
          Company's Annual Report on Form 10-K for the most recent fiscal year;

               (C) the unaudited financial statements which were not included in
          the Prospectus but from which were derived the unaudited condensed
          financial statements referred to in clause (A) and any unaudited
          income statement data and balance sheet items included in the
          Prospectus and referred to in clause (B) were not determined on a
          basis substantially consistent with the basis for the audited
          financial statements included or incorporated by reference in the
          Company's Annual Report on Form 10-K for the most recent fiscal year;

               (D) any unaudited pro forma consolidated condensed financial
          statements included or incorporated by reference in the Prospectus do
          not comply as to form in all material respects with the applicable
          accounting requirements of the Act and the rules and regulations
          adopted by the Commission thereunder or the pro forma adjustments have
          not been properly applied to the historical amounts in the compilation
          of those statements;

               (E) as of a specified date not more than five days prior to the
          date of such letter, there have been any changes in the consolidated
          capital stock (other than issuances of capital stock upon exercise of
          options and stock appreciation rights,


<PAGE>   26


          upon earn-outs of performance shares and upon conversions of
          convertible securities, in each case which were outstanding on the
          date of the latest balance sheet included or incorporated by reference
          in the Prospectus) or any increase in the consolidated long-term debt
          of the Company and its subsidiaries, or any decreases in consolidated
          net current assets or stockholders' equity or other items specified by
          the Representatives, or any increases in any items specified by the
          Representatives, in each case as compared with amounts shown in the
          latest balance sheet included or incorporated by reference in the
          Prospectus, except in each case for changes, increases or decreases
          which the Prospectus discloses have occurred or may occur or which are
          described in such letter; and

               (F) for the period from the date of the latest financial
          statements included or incorporated by reference in the Prospectus to
          the specified date referred to in clause (E) there were any decreases
          in consolidated net revenues or operating profit or the total or per
          share amounts of consolidated net income or other items specified by
          the Representatives, or any increases in any items specified by the
          Representatives, in each case as compared with the comparable period
          of the preceding year and with any other period of corresponding
          length specified by the Representatives, except in each case for
          increases or decreases which the Prospectus discloses have occurred or
          may occur or which are described in such letter; and

          (vii) In addition to the audit referred to in their report(s) included
     or incorporated by reference in the Prospectus and the limited procedures,
     inspection of minute books, inquiries and other procedures referred to in
     paragraphs (iii) and (vi) above, they have carried out certain specified
     procedures, not constituting an audit in accordance with generally accepted
     auditing standards, with respect to certain amounts, percentages and
     financial information specified by the Representatives which are derived
     from the general accounting records of the Company and its subsidiaries,
     which appear in the Prospectus (excluding documents incorporated by
     reference), or in Part II of, or in exhibits and schedules to, the
     Registration Statement specified by the Representatives or in documents
     incorporated by reference in the Prospectus specified by the
     Representatives, and have compared certain of such amounts, percentages and
     financial information with the accounting records of the Company and its
     subsidiaries and have found them to be in agreement.


          All references in this Annex II(a) to the Prospectus shall be deemed
to refer to the Prospectus (including the documents incorporated by reference
therein) as defined in the Underwriting Agreement as of the date of the letter
delivered on the date of the Pricing Agreement for purposes of such letter and
to the Prospectus as amended or supplemented (including the documents
incorporated by reference therein) in relation to the applicable Designated
Securities for purposes of the letter delivered at the Time of Delivery for such
Designated Securities.


<PAGE>   27


                                                                     ANNEX II(b)

     Pursuant to Section 7(d) of the Underwriting Agreement, the accountants
shall furnish letters to the Underwriters to the effect that:

          (i)  They are independent certified public accountants with respect to
     Commonwealth Energy and its subsidiaries within the meaning of the Act and
     the applicable rules and regulations adopted by the Commission;

          (ii) In their opinion, the financial statements and any supplementary
     financial information and schedules audited (and, if applicable, financial
     forecasts and/or pro forma financial information) examined by them and
     included or incorporated by reference in the Registration Statement or the
     Prospectus comply as to form in all material respects with the applicable
     accounting requirements of the Act or the Exchange Act, as applicable, and
     the related rules and regulations; and, if applicable, they have made a
     review in accordance with standards established by the American Institute
     of Certified Public Accountants of the consolidated interim financial
     statements, selected financial data, pro forma financial information,
     financial forecasts and/or condensed financial statements derived from
     audited financial statements of Commonwealth Energy for the periods
     specified in such letter, as indicated in their reports thereon, copies of
     which have been [SEPARATELY] furnished to the representative or
     representatives of the Underwriters (the "Representatives") such term to
     include an Underwriter or Underwriters who act without any firm being
     designated as its or their representatives [AND ARE ATTACHED TO SUCH
     LETTERS];

          (iii) They have made a review in accordance with standards established
     by the American Institute of Certified Public Accountants of the unaudited
     condensed consolidated statements of income, consolidated balance sheets
     and consolidated statements of cash flows included in the Prospectus and/or
     included in Commonwealth Energy's quarterly report on Form 10-Q
     incorporated by reference into the Prospectus as indicated in their reports
     thereon copies of which [HAVE BEEN SEPARATELY FURNISHED TO THE
     REPRESENTATIVES][ARE ATTACHED TO SUCH LETTERS]; and on the basis of
     specified procedures including inquiries of officials of Commonwealth
     Energy who have responsibility for financial and accounting matters
     regarding whether the unaudited condensed consolidated financial statements
     referred to in paragraph (vi)(A)(i) below comply as to form in all material
     respects with the applicable accounting requirements of the [ACT AND THE
     EXCHANGE] Act and the related rules and regulations, nothing came to their
     attention that caused them to believe that the unaudited condensed
     consolidated financial statements do not comply as to form in all material
     respects with the applicable accounting requirements of the [ACT AND THE
     EXCHANGE] Act and the related rules and regulations adopted by the
     Commission;

          (iv) The unaudited selected financial information with respect to the
     consolidated results of operations and financial position of Commonwealth
     Energy for the five most recent fiscal years included in the Prospectus and
     included or incorporated by reference in Item 6 of Commonwealth Energy's
     Annual Report on Form 10-K for the most recent fiscal year agrees with the
     corresponding amounts (after restatement where


<PAGE>   28


     applicable) in the audited consolidated financial statements for five such
     fiscal years included or incorporated by reference in Commonwealth Energy's
     Annual Reports on Form 10-K for such fiscal years;

          (v)  On the basis of limited procedures, not constituting an
     examination in accordance with generally accepted auditing standards,
     consisting of a reading of the unaudited financial statements and other
     information referred to below, a reading of the latest available interim
     financial statements of Commonwealth Energy and its subsidiaries,
     inspection of the minute books of Commonwealth Energy and its subsidiaries
     since the date of the latest audited financial statements included or
     incorporated by reference in the Prospectus, inquiries of officials of
     Commonwealth Energy and its subsidiaries responsible for financial and
     accounting matters and such other inquiries and procedures as may be
     specified in such letter, nothing came to their attention that caused them
     to believe that: (i) the unaudited condensed consolidated statements of
     income, consolidated balance sheets and consolidated statements of cash
     flows of Commonwealth Energy included in the Prospectus and/or included or
     incorporated by reference in Commonwealth Energy's Quarterly Reports on
     Form 10-Q incorporated by reference in the Prospectus do not comply as to
     form in all material respects with the applicable accounting requirements
     of the Exchange Act and the published rules and regulations adopted by the
     Commission, or (ii) any material modifications should be made to the
     unaudited condensed consolidated statements of income, consolidated balance
     sheets and consolidated statements of cash flows of Commonwealth Energy
     included in the Prospectus or included in Commonwealth Energy's Quarterly
     Reports on Form 10-Q incorporated by reference in the Prospectus for them
     to be in conformity with generally accepted accounting principles.

     All references in this Annex II(b) to the Prospectus shall be deemed to
refer to the Prospectus (including the documents incorporated by reference
therein) as defined in the Underwriting Agreement as of the date of the letter
delivered on the date of the Pricing Agreement for purposes of such letter and
to the Prospectus as amended or supplemented (including the documents
incorporated by reference therein) in relation to the applicable Designated
Securities for purposes of the letter delivered at the Time of Delivery for such
Designated Securities.


<PAGE>   1

                                                                     Exhibit 4.1

REGISTERED                                                            REGISTERED

No.R-1                                       PRINCIPAL AMOUNT: $ 300,000,000
CUSIP 67019E AA 5                            MATURITY DATE: February 15, 2010

                                             INTEREST PAYMENT

REGISTERED OWNER: Cede & Co.                 DATES: February 15 and August 15

                                     NSTAR

                         8% NOTE DUE FEBRUARY 15, 2010

     THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITORY OR A
NOMINEE THEREOF.

     Unless this Security is presented by an authorized representative of The
Depository Trust Company, a New York corporation ("DTC"). to NSTAR or its agent
for registration of transfer, exchange, or payment, and any certificate issued
is registered in the name of Cede & Co. or in such other name as is requested by
an authorized representative of DTC (and any payment is made to Cede & Co. or to
such other entity as is requested by an authorized representative of DTC), ANY
TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an
interest herein.

     NSTAR, a voluntary association duly organized and validly existing under
the laws of The Commonwealth of Massachusetts (herein called the "Company,"
which term includes any successor corporation under the Indenture hereinafter
referred to), for value received, hereby promises to pay to the Registered
Owner, or registered assigns, the Principal Amount on the Maturity Date, except
to the extent redeemed prior to the Maturity Date, and to pay interest on said
principal sum semi-annually on each Interest Payment Date, commencing August 15,
2000, at the rate per annum specified in the title of this Security, from the
February 15 or August 15, as the case may be, next preceding the date of this
Security to which interest has been paid unless the date hereof is a date to
which interest has been paid, in which case from the date of this Security, or
unless no interest has been paid on this Security, in which case from the date
of initial issuance until payment of said principal sum has been made or duly
provided for and at such rate on any overdue principal and premium and (to the
extent that the payment of such interest shall be legally enforceable) on any
overdue installment of interest. The interest so payable, and punctually paid or
duly provided for, on any Interest Payment Date will, except as otherwise
provided in said 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 February 1 or August 1, as the case may be, next preceding such February
15 or August 15. The principal of (and premium, if any) and interest on this
Security are payable in such coin or currency of the United States of America as
at the time payment is legal tender for payment of public and


<PAGE>   2


private debts, at the office or agency of Bank One Trust Company, N.A.
(hereinafter called the "Indenture Trustee," which term includes any successor
Indenture Trustee under the Indenture), as Indenture Trustee and Paying Agent,
located at 14 Wall Street, 8th Floor, New York, New York 10005, or at such other
office as the Indenture Trustee shall designate by written notice to the
Registered Owner of this Security; provided that interest shall be paid by wire
transfer in immediately available funds to an account located in the United
States of America as the registered Holder hereof shall designate to the
Indenture Trustee in writing at least 15 business days prior to such Interest
Payment Date. Any interest not punctually paid or duly provided for shall be
payable as provided in the Indenture.

     REFERENCE IS HEREBY MADE TO THE FURTHER PROVISIONS, INCLUDING THE OPTIONAL
REDEMPTION 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.

     THE NAME "NSTAR" MEANS THE TRUSTEES, AS TRUSTEES BUT NOT PERSONALLY, UNDER
THE DECLARATION OF TRUST DATED APRIL 20, 1999, AS AMENDED FROM TIME TO TIME.
Ably OBLIGATION, AGREEMENT, OR LIABILITY MADE, ENTERED INTO, OR INCURRED BY OR
ON BEHALF OF NSTAR BINDS ONLY ITS TRUST ESTATE, AND NO SHAREHOLDER, DIRECTOR,
TRUSTEE, OFFICER OR AGENT THEREOF ASSUMES OR SHALL BE HELD TO ANY LIABILITY
ENTERED INTO ON BEHALF OF NSTAR.


                                      -2-
<PAGE>   3


     This Security is one of a duly authorized issue of securities of the
Company (herein called the "Securities") issued under the Indenture dated as of
January 12, 2000, between the Company and Bank One Trust Company, N.A., as
Indenture Trustee, to which Indenture and all other indentures supplemental
thereto reference is hereby made for a statement of the respective rights
thereunder of the Company, the Indenture Trustee and the Holders of the
Securities and the terms upon which the Securities are, and are to be,
authenticated and delivered. This Security is one of the series designated as
the 8% Notes due February 15, 2010.

     The Securities are redeemable, in whole or in part, at the Company's option
at any time. The redemption price for the Securities to be redeemed will equal
the greater of the following amounts, plus, in each case, accrued interest
thereon to the redemption date: (i) 100% of the principal amount of the
Securities to be redeemed or (ii) as determined by a Reference Treasury Dealer
(as defined herein), the sum of the present values of the remaining scheduled
payments of principal and interest on the Securities to be redeemed (not
including any portion of any payments of interest accrued as of the redemption
date) discounted to the redemption date on a semi-annual basis at the Adjusted
Treasury Rate (as defined herein) plus 15 basis points. The redemption price
will be calculated assuming a 360-day year consisting of twelve 30-day months.
The Company will mail notice of any redemption at least 30 days but not more
than 60 days before the redemption date to each Holder of the Securities to be
redeemed. Un less the Company defaults in payment of the redemption price, on
and after the redemption date, interest will cease to accrue on the Securities
or portions thereof called for redemption.

     The terms which follow, when used in this Security, shall have the
following meanings: "Adjusted Treasury Rate" means, with respect to any
redemption date, the rate per annum equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, assuming a price for the Comparable
Treasury Issue (expressed as a percentage of its principal amount) equal to thc
Comparable Treasury Price for such redemption date; "Comparable Treasury Issue"
means the United States Treasury security selected by a Reference Treasury
Dealer as having a maturity comparable to the remaining term of the Securities
being redeemed that would be utilized, at the time of selection and in
accordance with customary financial practice, in pricing new issues of corporate
debt securities of comparable maturity to the remaining term of such Securities;
"Comparable Treasury Price" means, with respect to any redemption date, (A) the
average of the Reference Treasury Dealer Quotations for such redemption date,
after excluding the highest and lowest such Reference Treasury Dealer
Quotations, or (B) if the Indenture Trustee obtains fewer than three such
Reference Treasury Dealer Quotations, the average of all such Reference Treasury
Dealer Quotations; "Reference Treasury Dealer" means (i) each of Goldman, Sachs
& Co, Salomon Smith Barney Inc., Banc One Capital Markets, Inc., Credit Suisse
First Boston Corporation and FleetBoston Robertson Stephens Inc. and their
respective successors, unless any of them ceases to be a primary U.S.
Government securities dealer in New York City (a "Primary Treasury Dealer"), in
which case the Company shall substitute another


                                      -3-
<PAGE>   4


Primary Treasury Dealer; and (ii) any other Primary Treasury Dealer selected by
the Company; and "Reference Treasury Dealer Quotations" means, with respect to
each Reference Treasury Dealer and any redemption date, the average, as
determined by the Indenture Trustee, of the bid and asked prices for the
Comparable Treasury Issue (expressed in each case as a percentage of its
principal amount) quoted in writing to the Indenture Trustee by such Reference
Treasury Dealer at 5:00 p.m. (New York City time) on the third business day
preceding such redemption date.

     As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this Security may be registered on the Security Register
of the Company, upon surrender of this Security for registration of transfer at
the office or agency of the Indenture Trustee, as Indenture Trustee and Paying
Agent, located at 14 Wall Street, 8th Floor, New York, New York 10005, or at
such other office as the Indenture Trustee shall designate by written notice to
the Registered Owner of this Security, duly endorsed by, or accompanied by a
written instrument of transfer in form satisfactory to the Company and the
Indenture Trustee duly executed by, the registered Holder hereof or his attorney
duly authorized in writing and thereupon one or more new Securities of this
series, of any authorized denominations and for a like aggregate principal
amount and tenor, will be issued to the designated transferee or transferees;
provided, however, that the Indenture Trustee will not be required to register
the transfer of or exchange any Security that has been called for redemption in
whole or in part, except the unredeemed portion of Securities being redeemed in
part.

     The Securities of this series are issuable only in registered form without
coupons in minimum denominations of $1,000 or any amount in excess thereof which
is an integral multiple of $1,000. As provided in the Indenture, and subject to
certain limitations therein set forth, Securities of this series are
exchangeable for a like aggregate principal amount and tenor of Securities of
this series of any authorized denomination, as requested by the Holder
surrendering the same; provided, however, that the Company shall not be required
to issue any Securities of this series of a denomination less than $1,000.

     No service charge (to the Holder) will be made for any such transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

     The Indenture Trustee shall be entitled to withhold from all payments of
principal of (and premium, if any) and interest on this Security any amounts
required to be withheld under the applicable provisions of the Federal income
tax laws of the United States at the time of such payments.

     Prior to due presentment for registration of transfer of this Security, the
Company, the Indenture Trustee and any agent of the Company or the Indenture
Trustee, may treat the Person in whose name this Security is registered as the
owner hereof for the purpose of receiving payment as herein provided and for all
other purposes, whether or not this Security be overdue


                                      -4-
<PAGE>   5


and neither the Company, the Indenture Trustee nor any agent of the Company or
Indenture Trustee shall be affected by notice to the contrary.

     If an Event of Default shall occur and be continuing, the principal of the
Securities of this series may be declared due and payable, and such declarations
may be in certain events rescinded, in the manner and with the effect provided
in the Indenture.

     The Indenture permits, to the extent therein provided, the modification of
the rights and obligations of the Company and the rights of the Holders of the
Securities of each series to be affected under the Indenture at any time by the
Company with the consent of the Holders of a majority in aggregate principal
amount of the Securities at the time Outstanding if all of the Securities
Outstanding are affected, or the Holders of a majority in aggregate principal
amount of each series to be affected, in case one or more, but less than all, of
the series of the Outstanding Securities are affected. The Indenture also
contains provisions permitting the Holders of specified percentages in
aggregate principal amount of the Securities of each series at the time
Outstanding, on behalf of the Holders of all Securities of such series, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and the consequences thereof. 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 herefor or in
lieu hereof, whether or not notation of such consent or waiver is made upon this
Security or such other Security.

     The Securities of this series are unsecured.

     All terms in this Security which are defined in the Indenture shall have
the meanings assigned to them in the Indenture.

     This Security shall be governed by and construed in accordance with the
laws of The Commonwealth of Massachusetts.

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


                                      -5-
<PAGE>   6


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

                                                  NSTAR


Dated:______________________________              By:___________________________
                                                  Title:


                                                  Attest:


                                                  ______________________________
                                                  Title: Clerk/Secretary



               INDENTURE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

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

                                             BANK ONE TRUST COMPANY, N.A.,
                                                as Indenture Trustee


                                             By:_________________________
                                                 Authorized Signatory


                                      -6-
<PAGE>   7


                                 ABBREVIATIONS

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

TEN COM - as tenants in common

TEN ENT - as tenants by the entireties

JT TEN - as joint tenants with right of survivorship and not as tenants in
         common

UNIF GIFT MIN ACT -                    Custodian
                         (Cust)                         (Minor)
                         under Uniform Gifts to Minors Act

                                        (State)

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


                                      -7-
<PAGE>   8


                                   ASSIGNMENT

FOR VALUE RECEIVED, I or we sell, assign and transfer to

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE:


___________________________

_______________________________________________________________________
(Print or type name, address and zip code of assignee)

_______________________________________________________________________

the within Security and hereby irrevocably constitute and appoint ___________
attorney to transfer the said Security on the books of the Company with full
power of substitution in its premises.

Dated: ________________________________ Signed: _______________________

Signatures must be guaranteed by a commercial bank or trust company or a member
of a major stock exchange.

_________________________________
Signature Guarantee

NOTICE: The above signatures of the holder(s) hereof must correspond with the
name as written upon the face of the Note in every particular, without
alteration or enlargement or any change whatever.


                                      -8-


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