Document:

<PAGE>

                                                                  Exhibit 10.a.2

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      In connection with the annual report on Form 20-F of BE Semiconductor
Industries N.V. (the "Company") for the period ended December 31, 2002, as filed
with the Securities and Exchange Commission on the date hereof (the "Report"),
the undersigned, Cor te Hennepe, Director of Finance of the Company, hereby
certifies, pursuant to 18 U.S.C. Section 1350, that:

      (1) The Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.

Dated: March 31, 2003                              /s/ Cor te Hennepe
                                                   ------------------

                                                   Cor te Hennepe
                                                   Director of Finance<PAGE>
                                                                    EXHIBIT 10.3

                               AGREEMENT TO AMEND

      THIS AGREEMENT TO AMEND is made and entered into as of July 23, 2002 by
and between Great Bay Power Corporation, a New Hampshire corporation, ("GBPC"),
and Unitil Power Corp., a New Hampshire corporation, ("Unitil Power").

      WHEREAS GBPC and Unitil Power are parties to a Purchased Power Agreement
dated as of April 26, 1993 (the "PPA"); and

      WHEREAS the parties desire to amend and restate the PPA, as more
particularly provided for hereafter;

      NOW, THEREFORE, in consideration of the premises and mutual obligations
and undertakings set forth herein, and for other good and valuable
consideration, the receipt and adequacy of which is hereby acknowledged, the
parties agree as follows:

      1. Amendment of PPA. The parties hereby agree that, subject to the
satisfaction of the conditions precedent set forth in Section 4, below,
effective as of December 1, 2002, they shall enter into the Amended and Restated
Purchased Power Agreement (the "Amended and Restated PPA") in the form attached
hereto as Exhibit A; provided, however, that GBPC may elect an earlier effective
date of the Amended and Restated PPA, assuming satisfaction of the conditions
precedent set forth in Section 4, below, by written notice delivered to Unitil
Power not less than five days prior to such earlier effective date; and
provided, further, that if the conditions precedent set forth in Section 4 below
are not satisfied on or before December 1, 2002, then, subject to the
termination provisions set forth in said Section 4, the effective date of the
Amended and Restated PPA shall be that date which is two business days following
the date on which all of such conditions precedent have been satisfied. The date
on which the Amended and Restated PPA is effective shall be the "Commencement
Date".

      2. Until the Commencement Date, the PPA shall remain in effect in
accordance with its terms and the parties shall continue to perform their
obligations thereunder. In the event that for any reason including, without
limitation, a termination of this Agreement pursuant to Section 4, below, the
parties do not enter into the Amended and Restated PPA, then the PPA shall
remain in effect in accordance with its terms. Following the Commencement Date,
the provisions of the PPA shall remain in effect as appropriate with respect to
all transactions between the parties occurring prior to the Commencement Date
under the PPA.

      3. Release of Mortgage and Security Interest. On the Commencement Date,
the Third Mortgage and Security Agreement between the parties dated as of
December 22, 1993 (the "Mortgage") shall be terminated and Unitil Power hereby
agrees to execute and deliver to GBPC on such date a mortgage discharge and UCC
termination statements in forms appropriate for filing.

      4. Conditions Precedent; Termination. The obligation of the parties to
enter into the Amended and Restated PPA and termination of the Mortgage
contemplated by Section 3 hereof shall be and are subject to and conditioned on:
<PAGE>
      (A) the acceptance for filing by the Federal Energy Regulatory Commission
("FERC") of the Amended and Restated PPA without conditions or changes to the
MWh and MW purchases or to the rates set forth therein; and

      (B) the delivery by GBPC to Unitil Power of the Letter of Credit
contemplated by Section 11.2 of the Amended and Restated PPA.

      In the event that prior to December 31, 2002 FERC:

                  i. does not accept the Amended and Restated PPA without
modification of any MWh or MW purchase or any rate set forth therein;

                  ii. sets a refund effective date under Section 206(b) of the
Federal Power Act; or

                  iii. takes any action that imposes a refund obligation upon
GBPC with respect to the Amended and Restated PPA;

then GBPC or Unitil Power may at any time thereafter terminate this Agreement
without any liability to the other party for such termination, the obligation of
the parties to enter into the Amended and Restated PPA shall accordingly
terminate, and the PPA shall remain in effect in accordance with its terms. Each
of GBPC and Unitil Power agree that, except with the prior written consent of
the other party, it will not, and will use its best efforts to ensure that its
affiliates will not, institute or voluntarily cooperate in the institution or
conduct of any action or proceeding of FERC under Part II, Section 206, or any
other provision, of the Federal Power Act, which action or proceeding is
intended for the purpose of, or could reasonably be expected to have the effect
of changing the terms of the Amended and Restated PPA.

      5. Modification; Waiver. This Agreement may be modified only by an
instrument in writing signed by duly authorized representatives of both parties.
Delay or failure of either party to enforce any provision of this Agreement, or
to require performance by the other party of any provision hereof, shall not be
construed as a waiver of such provision, or any other provision, or affect the
validity of this Agreement.

      6. Binding Effect. The provisions, covenants and agreements herein
contained will inure to the benefit of, and be binding upon, the parties hereto
and their respective successors and assigns.

      7. Governing Law. This Agreement shall be governed and interpreted
according to the laws of the State of New Hampshire.

      8. Counterparts. This Agreement may be executed in two or more
counterparts, each of which will be deemed and original, but all of which
collectively constitute one and the same agreement.
<PAGE>
      IN WITNESS WHEREOF, the parties have caused this Agreement to be signed by
their respective authorized officers as of the date first written above.

GREAT BAY POWER CORPORATION                 UNITIL POWER CORP.

By:        /S/ Anthony M. Callendrello      By:        /S/ David K. Foote
   -------------------------------------       ---------------------------------
Name:      Anthony M. Callendrello          Name:      David K. Foote
     -----------------------------------         -------------------------------
Title:     Vice President                   Title:     President
      ----------------------------------          ------------------------------<PAGE>
                                                                    EXHIBIT 10.4

Great Bay Power Corporation                                Original Sheet No. 1
First Revised Rate Schedule FERC No. 16

                 AMENDED AND RESTATED PURCHASED POWER AGREEMENT

                                     BETWEEN

                           GREAT BAY POWER CORPORATION

                                       AND

                               UNITIL POWER CORP.

      THIS AMENDED AND RESTATED PURCHASED POWER AGREEMENT ("Agreement") is made
and entered into as of November 1, 2002, (the "Commencement Date") by and
between Great Bay Power Corporation ("SELLER") and Unitil Power Corp. ("BUYER").

                                WITNESSETH THAT:

      WHEREAS, BUYER is a New Hampshire corporation, purchasing electric power
and energy for resale to its affiliates in the State of New Hampshire; and

      WHEREAS, SELLER is a New Hampshire corporation involved in the purchase
and sale of wholesale electricity; and

      WHEREAS, BUYER and SELLER are parties to a Purchased Power Agreement dated
as of the 26th day of April, 1993 (the "Original Purchased Power Agreement");
and

      WHEREAS, BUYER and SELLER desire to amend and restate the Original
Purchased Power Agreement on the terms and conditions set forth herein.

Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 2
First Revised Rate Schedule FERC No. 16

      NOW, THEREFORE, in consideration of the premises and of the mutual
obligations and undertakings set forth herein, the parties agree as follows:

                                ARTICLE 1. TERM

      This Agreement shall become effective on the Commencement Date and shall
expire at 12:00 midnight on October 31, 2010, unless extended or sooner
terminated in accordance with the terms set forth herein. The applicable
provisions of this Agreement shall continue in effect after the termination of
this Agreement to the extent necessary to provide for final billing and billing
adjustments, but all such billing and billing adjustments shall be made not
later than twelve months following the termination of this Agreement. If
information necessary to provide for any final billing or billing adjustment
remains unavailable at the end of such twelve month period, such final billing
or billing adjustments shall be made based on the good faith estimates of the
parties.

                             ARTICLE 2. DEFINITIONS

      The following defined terms shall be used in this Agreement:

2.1   "Deflator(t)" shall refer to the final calculation of the Gross Domestic
      Product Implicit Price Deflator for the month prior to the first day of
      the period for which the price adjustment is being calculated, as such
      final Deflator is listed in the index published by the Bureau of Economic
      Analysis of the Department of Commerce (the "Index"). For example, if the
      price adjustment is being calculated for the one year period beginning
      November 1, 2003, the Deflator(t) would be the final Deflator for the
      month of October, 2003 published in the Index.

2.2   "Deflator(t-n)" shall refer to the final calculation of the Gross Domestic
      Product Implicit Price Deflator as listed in the Index published with
      respect to the month

                                      -2-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 3
First Revised Rate Schedule FERC No. 16

      which was n months before the month prior to the first day of the period
      for which the price adjustment is being calculated. For example, if the
      price adjustment is being calculated for the one year period beginning
      November 1, 2003, based on a comparison of Deflator(t) to the Deflator
      applicable on the same date 12 months earlier (that is, the Deflator
      applicable for November 1, 2002), the earlier Deflator would be expressed
      as Deflator (t-12) and that Deflator would be the final Deflator published
      for the month of October, 2002.

2.3   If the Index required to calculate a Deflator(t) or a Deflator (t-n) has
      not yet been published when a calculation is required, the parties shall
      use a good faith estimate of the applicable final Deflator and for such
      calculation and shall, promptly after the applicable final Deflator is
      published, make such adjustments as are necessary to reflect the actual
      final Deflator.

2.4   Capitalized terms used herein and not otherwise defined shall have the
      meanings given them in the New England Power Pool ("NEPOOL") Agreement
      dated September 1, 1971, as amended by the Restated NEPOOL Agreement filed
      with FERC on June 22, 1998, as finally approved by FERC and as further
      amended and restated from time to time (the "NEPOOL Agreement").

                           ARTICLE 3. POWER PURCHASE

3.1   Commencing on the Commencement Date, SELLER shall sell and BUYER shall
      purchase from SELLER 9.06 megawatthours ("MWh") per hour of firm energy
      and 9.06 megawatts ("MW") of capacity (currently referred to as ICAP).
      BUYER shall purchase such power at a purchase price of 5.034 cents per
      kilowatthour

                                      -3-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 4
First Revised Rate Schedule FERC No. 16

      ("kWh") of energy actually delivered to the Delivery Point pursuant to
      Article 4 below, as adjusted from time to time as set forth in Section 3.3
      below (as adjusted, the "Purchase Price").

3.2   For purposes of this Agreement, "firm" shall mean that SELLER's obligation
      to sell and deliver the energy and capacity provided for in Section 3.1,
      above, shall be excused only to the extent that, and for the period during
      which, such performance is prevented by Force Majeure affecting SELLER,
      and that BUYER's obligation to purchase and pay for such energy and
      capacity shall be excused only to the extent that, and for the period
      during which, such performance is prevented by Force Majeure affecting
      BUYER.

3.3   On November 1st of each year commencing in 2003 and until and including
      2009, the Purchase Price shall be increased by a percentage equal to the
      greater of (A) zero or (B) [((Deflator(t)/Deflator(t-12)) -1) x 100]% -4%.

3.4   By way of example, if (a) the Purchase Price on November 1, 2005 is 6.0
      cents per kWh, (b) the Deflator(t) is 112 and (c) the Deflator(t-12) is
      101, then the formula in 3.3 would be applied as follows:

      [(112/101 - 1) x 100%] - 4% = 6.89%

      6.0 cents per kWh increased by 6.89% = 6.41 cents per kWh

      Thus, 6.41 cents per kWh would be the Purchase Price for the period from
      November 1, 2005 through October 31, 2006.

                                      -4-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 5
First Revised Rate Schedule FERC No. 16

                      ARTICLE 4. TRANSMISSION AND DELIVERY

            Prior to the implementation of the Standard Market Design ("SMD") in
NEPOOL, power purchased by BUYER from SELLER hereunder shall be delivered to
BUYER at the NEPOOL PTF ("Delivery Point"), as defined in the NEPOOL Agreement.
After the implementation of the SMD in NEPOOL, the Delivery Point shall be the
load zone defined by ISO-New England, Inc. ("ISO-NE") that includes the Seabrook
node. BUYER shall arrange for and assume all costs of transmission at and from
the Delivery Point.

                        ARTICLE 5. EXTENSION OF PURCHASE

5.1   BUYER shall have the right and option, exercisable in its sole discretion,
      to extend its right to purchase power pursuant to this Agreement for up to
      an additional twelve (12) years commencing November 1, 2010. This option
      shall expire and be of no further force or effect unless BUYER gives
      written notice to SELLER that it has determined to exercise the option on
      or before November 1, 2005.

5.2   The purchase price for power purchased pursuant to an extension of this
      Agreement for the year commencing November 1, 2010 shall be a rate per kWh
      equal to 6.5 cents per kWh multiplied by (Deflator(t)/Deflator(t-216)), as
      adjusted from time to time as set forth in Section 5.3 below (as adjusted,
      the "Extension Purchase Price").

5.3   On November 1st of each year commencing in 2011 and until and including
      2021, the Extension Purchase Price with the respect to the years through
      and including

                                      -5-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 6
First Revised Rate Schedule FERC No. 16

      2021, shall be increased by a percentage equal to the greater of (A) zero
      or (B) [(Deflator(t) /Deflator(t-12) - 1) x 100%].

                         ARTICLE 6. BILLING AND PAYMENT

6.1   Bills shall be rendered by SELLER as soon as practicable after the end of
      each calendar month during the term of this Agreement. Bills shall
      incorporate such information as is necessary or desirable to determine the
      accuracy of payments due for such month.

6.2   Bills may be based in whole or in part upon estimates. All payments shown
      to be due on any bill, subject to subsequent adjustments as may be
      necessary to correct for any errors in arithmetic, computation, meter
      readings, estimating (including without limitation estimates of the Index
      pursuant to Section 2.1), or otherwise, shall be due and payable not later
      than the Due Date, which shall be 15 days after the receipt of such bill
      by BUYER. Any subsequent adjustments shall be made in good faith and
      reflected in subsequent bills. All amounts due which remain unpaid after
      the Due Date, or if the amount of the bill is reasonably disputed, all
      amounts finally determined to be due and payable, and all amounts
      determined to be required to be returned to BUYER after the resolution of
      a dispute, shall bear interest at the annual rate of two percentage points
      over the "Base Rate" or comparable base lending rate then in effect at the
      main office of Fleet Bank, located in Boston, Massachusetts, or its
      successor bank, from the date such bill is rendered through the date of
      payment. A party may not dispute a bill unless such disputing party
      notifies the other party within two years of the date of the sending of
      the disputed bill.

                                      -6-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 7
First Revised Rate Schedule FERC No. 16

6.3   If any bill remains unpaid after the Due Date, except for amounts
      reasonably in dispute, and such bill remains unpaid for a period of 10
      days after the Due Date, SELLER shall have the right to terminate this
      Agreement or to suspend delivery of power under this Agreement five days
      after BUYER receives notice of such termination or suspension, as the case
      may be, in accordance with Section 18.5, provided any such bill remains
      unpaid at the end of such five day period, unless, prior to the end of
      such five day period, BUYER provides SELLER with a reasonably detailed
      written statement of its reasons for disputing the bill.

              ARTICLE 7. LIABILITY, INDEMNIFICATION, AND INSURANCE

7.1   Nothing in this Agreement shall create any duty, standard of care, or
      liability to, or any right in, any person not a party to it. Neither party
      shall be liable to the other party for any consequential or punitive
      damages.

7.2   Each party (the "Indemnifying Party") shall indemnify and hold harmless
      the other party (the "Indemnified Party") (including its corporate parent,
      corporate subsidiaries, affiliates, agents, officers, directors,
      employees, successors, and assigns) from and against any damages or losses
      whatsoever, including but not limited to damages resulting from the
      willful misconduct or gross negligence of the Indemnifying Party, suffered
      by the Indemnified Party by reason of personal injury, death or damage to
      property directly or indirectly caused by, arising out of, sustained on,
      or in any way connected with the Indemnifying Party's use or operation of
      its own facilities in the performance of this Agreement, except that each
      party shall be solely responsible for, and shall bear all costs arising
      from, any such injury, death, or damage to third parties caused by or
      claimed to have been

                                      -7-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 8
First Revised Rate Schedule FERC No. 16

      caused by the actions of the applicable party's own employees or
      contractors covered by any workers' compensation law.

          ARTICLE 8. LAWS, REGULATIONS, ORDERS, APPROVALS, PERMITS AND
                               FEDERAL ENERGY TAX

8.1   This Agreement is made subject to all applicable present and future local,
      state, and federal laws and to the regulations or orders of any local,
      state, or federal regulatory authority having jurisdiction over the
      matters set forth herein, and performance hereunder is conditioned upon
      securing and retaining such local, state, and federal approvals, grants,
      or permits as may from time to time be necessary with respect to such
      performance. Both parties agree to use their respective best efforts to
      secure and retain all such approvals, grants, and permits including, but
      not limited to, acceptance for filing by the FERC of the rates provided
      for in this Agreement, provided that this requirement shall not create any
      obligation for BUYER to incur material costs. BUYER acknowledges that this
      Agreement is an arm's-length agreement and will support the FERC filing of
      SELLER.

8.2   SELLER and BUYER agree that if and to the extent that the United States
      imposes a so-called "Energy Tax" on SELLER, BUYER shall, in addition to
      the Purchase Price or the Extension Purchase Price, as the case may be,
      pay to SELLER the "Tax Reimbursement Amount," determined as described in
      the following sentence. The Tax Reimbursement Amount shall be that portion
      of SELLER's Energy Tax payment attributable to the kwh purchased by BUYER
      from SELLER during the applicable period of time, provided that if the
      rate at

                                      -8-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 9
First Revised Rate Schedule FERC No. 16

      which the Energy Tax is determined for any of natural gas, oil or coal
      during such period is less than the rate at which the Energy Tax is
      determined for SELLER, the lowest such rate for natural gas, oil or coal,
      as the case may be, shall be used to determine the Tax Reimbursement
      Amount for such period and SELLER shall bear sole responsibility for any
      additional tax liability. SELLER and BUYER shall, if and when the Energy
      Tax is implemented, establish by mutual agreement a reasonable methodology
      for determining what the Energy Tax rate is with respect to natural gas,
      oil or coal. SELLER shall include charges for the Tax Reimbursement Amount
      in its monthly billing under Section 6.1 above, subject to adjustment
      under Section 6.2 above.

                     ARTICLE 9. MATERIAL DEFAULT BY SELLER

      The following shall constitute events of Material Default by SELLER:

      (a)   SELLER (i) files for or becomes subject to a proceeding under
            federal or state bankruptcy or insolvency law seeking the
            liquidation or reorganization of SELLER, or the readjustment of
            indebtedness of SELLER (unless such proceeding shall be dismissed
            within 90 days from the date it is instituted); (ii) files for or
            becomes subject to a proceeding under Title 11 of the United States
            Code (the "Bankruptcy Code") and rejects this Agreement under the
            Bankruptcy Code: (iii) makes an assignment for the benefit of
            creditors, becomes insolvent, or is unable to pay its debts
            generally as they become due; (iv) consents to the appointment of
            any receiver, administrator, liquidator or trustee of its property
            or any receiver, administrator, liquidator or trustee shall

                                      -9-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 10
First Revised Rate Schedule FERC No. 16

            be appointed for SELLER or for all or any part of the property of
            SELLER; or (v) takes any action for the purpose of effecting any of
            the foregoing;

      (b)   SELLER fails, for a period of 90 days from its receipt of written
            notice from BUYER to cure such failure, to perform a material
            obligation of this Agreement not otherwise specifically described in
            this Article 9; or

      (c)   SELLER has failed for a period of 90 days from its receipt of
            written notice from BUYER to pay any amounts due and invoiced by
            BUYER under the terms of this Agreement, except for amounts SELLER
            is contesting in good faith.

      SELLER shall notify BUYER of the occurrence of any event of Material
Default promptly upon SELLER's initiating or learning of the occurrence of such
event; such notice shall be given by SELLER even if the event of Material
Default can be cured or mitigated as described herein.

                  ARTICLE 10. TERMINATION FOR MATERIAL DEFAULT

      In the event of the occurrence of a Material Default described in Article
9 hereof which continues beyond the expiration of any cure periods provided for
therein, BUYER shall have the right, but not the obligation, to terminate this
Agreement upon written notice to SELLER, and to collect damages as and to the
extent provided for in Article 11 hereof.

                       ARTICLE 11. MINIMUM COVER DAMAGES

11.1  Notwithstanding any other provisions of this Agreement, in the event of a
      Material Default as a result of which BUYER terminates this Agreement as

                                      -10-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 11
First Revised Rate Schedule FERC No. 16

      provided for in Article 10, BUYER shall be entitled to minimum cover
      damages ("Minimum Cover Damages"). Such Minimum Cover Damages shall be
      equal to the amount estimated to cover fully the difference (where
      positive) between the cost of replacement energy projected from the date
      of such Material Default through October 31, 2010, or through October 31,
      2022 if BUYER has exercised its option under Article 5 prior to the date
      of such Material Default, and the price which BUYER would have paid for
      such energy hereunder if no such Material Default had occurred. Minimum
      Cover Damages shall be calculated using good faith estimates of the
      various escalation provisions hereof and taking into account the actual
      steps taken by BUYER to the date of such calculation to obtain replacement
      energy and BUYER's plans for the then-remaining portion of the period
      through October 31, 2010, or through October 31, 2022 if BUYER has
      exercised its option under Article 5 prior to the date of such Material
      Default. The amount determined to be due and payable hereunder as Minimum
      Cover Damages shall bear interest at the annual rate of two percentage
      points over the "Base Rate" or comparable base lending rate then in effect
      at the main office of Fleet Bank, located in Boston, Massachusetts, or its
      successor bank, from the date the applicable Event of Material Default
      occurs through the date of payment. Nothing herein shall excuse BUYER from
      taking all commercially reasonable steps to mitigate damages in accordance
      with the provisions of law.

11.2  To secure the obligations of SELLER to pay the Minimum Cover Damages,
      SELLER shall cause to be issued for the benefit of BUYER on or prior to
      the Commencement Date an irrevocable stand-by Letter of Credit which shall
      remain

                                      -11-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 12
First Revised Rate Schedule FERC No. 16

      in effect during the entirety of the term set forth in Article 1 hereof
      (the "Letter of Credit") in the amount of $2,500,000.00 (the "L/C
      Amount"), subject to the following:

      (a)   The Letter of Credit shall be issued by a bank (the "Issuer") having
            senior unsecured debt securities rated ("Debt Rating") at least
            investment grade by Moody's Investors Services, Inc. ("Moody's")
            (currently Baa) or by Standard & Poors Corporation ("S&P")
            (currently BBB) ("Investment Grade") and having a net worth as shown
            on its most recent audited balance sheet of at least $500 million.
            The form of such Letter of Credit shall be reasonably acceptable to
            BUYER.

      (b)   The obligation of SELLER to provide and have in effect the Letter of
            Credit described in this Section 11.2 shall be terminated in the
            event that SELLER (or an affiliate of SELLER that provides an
            unconditional and irrevocable guaranty of SELLER's obligations under
            this Agreement in favor of BUYER in form and substance reasonably
            acceptable to BUYER) has a Debt Rating of at least A3 by Moody's or
            A- by S&P ("Acceptable Quality"); provided that if such Debt Rating
            is subsequently terminated, reduced from or downgraded below
            Acceptable Quality, SELLER shall, within three business days of such
            termination, reduction, or downgrade, post and reinstate the Letter
            of Credit, in the amount and for the term described in this Section
            11.2, and the obligation to maintain the Letter of Credit shall in
            all respects be governed by this Section 11.2.

                                      -12-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 13
First Revised Rate Schedule FERC No. 16

                              ARTICLE 12. REMEDIES

      Subject to the provisions of Article 9 hereof, upon either party's failure
to perform any obligation of this Agreement, the other party, in addition to the
rights described in specific sections of this Agreement, and except to the
extent specifically limited by this Agreement, may exercise, at its election,
any rights and claim and obtain any remedies it may have at law or in equity
including, without limitation, compensation for monetary damages, injunctive
relief and specific performance.

                             ARTICLE 13. ASSIGNMENT

      The rights and/or obligations of a party under this Agreement may not be
assigned without the prior written consent of the other party, which consent
shall not be unreasonably withheld; provided, however, that an assignment of
this Agreement by either BUYER or SELLER to a third party assignee which at the
time of such assignment has senior unsecured debt securities having an
Investment Grade rating, or whose obligations hereunder are unconditionally and
irrevocably guaranteed by an affiliate of such third party assignee which at the
time of such assignment has senior unsecured debt securities having an
Investment Grade rating , shall not require the consent of the non-assigning
party, so long as the third party assignee executes and delivers to the
non-assigning party an instrument pursuant to which it assumes all of the
obligations of the assigning party hereunder and demonstrates to the
non-assigning party that it (or its affiliate guarantor) meets such Investment
Grade requirements. Any such assignment to a third party assignee meeting the
Investment Grade requirements of the previous sentence shall relieve the
assigning party of any further obligations or liabilities hereunder upon

                                      -13-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 14
First Revised Rate Schedule FERC No. 16

consummation of such assignment in accordance with the requirements of the
foregoing sentence.

                           ARTICLE 14. INTERPRETATION

      To the extent that state law is applicable, the interpretation and
performance of this Agreement shall be in accordance with, and controlled by,
the laws of the State of New Hampshire.

                           ARTICLE 15. FORCE MAJEURE

15.1  "Force Majeure" shall mean any cause beyond the reasonable control of, and
      without the fault or negligence of, the party claiming Force Majeure,
      including, without limitation, storm, flood, lightning, drought,
      earthquakes, hurricane, tornado, landslide, fire, epidemic, war, riot,
      sabotage, explosions, civil disturbance, labor dispute, act of God or the
      public enemy, action of a court, public authority or governmental entity,
      change in law, or inability to obtain necessary regulatory approvals.
      Notwithstanding the foregoing, none of the following shall constitute
      Force Majeure hereunder: (i) the inability of a party to obtain financing
      at any time or from time to time; (ii) the failure or inability of a party
      to realize a profit or avoid a loss attributable to the performance of its
      obligations or the exercise of its rights under this Agreement; (iii) the
      failure of SELLER to have entered into contracts for the purchase by
      SELLER of power and capacity for resale to BUYER hereunder or for the
      transmission of such power to the Delivery Point; or (iv) the failure or
      inability of BUYER to use or resell the power and capacity made available
      to it at the Delivery Point by SELLER hereunder.

                                      -14-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 15
First Revised Rate Schedule FERC No. 16

15.2  A party shall be excused from performing under this Agreement, to the
      extent and for the period that the party's inability to perform is caused
      by a Force Majeure, provided that the nonperforming party promptly gives
      the other party written notice describing the particulars of the Force
      Majeure, and that the nonperforming party shall exert its best efforts to
      resume performance hereunder within the earliest practicable time
      following any such Force Majeure. A Force Majeure shall not excuse the
      obligations of either party under the indemnification provisions of
      Section 7.3.

                     ARTICLE 16. SEVERABILITY OF PROVISIONS

      If any one or more provisions contained herein shall be finally determined
by any court of competent jurisdiction to contravene, or be invalid under, any
applicable provision of law, or shall at any time fail to be effective or
operational for any reason other than a default under this Agreement, including
without limitation disallowance or invalidation by any regulatory authority
having jurisdiction over the matters contained in the Agreement, such
contravention, invalidity, disallowance, or failure to be effective or
operational shall not invalidate this entire Agreement, but such provision or
provisions shall be severed from this Agreement, and the Agreement shall be
construed as if not containing such provision or provisions, and the rights and
obligations of the parties shall be construed and enforced accordingly;
provided, however, that no new obligation shall thereby be imposed on either
party. The parties will negotiate in good faith to provide a substitute for such
severed provision or provisions, but no such substitute shall be binding on
either party unless set forth in a written document executed and delivered by
each of

                                      -15-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 16
First Revised Rate Schedule FERC No. 16

the parties to this Agreement and filed with and accepted for filing by such
regulatory authorities as have jurisdiction.

                            ARTICLE 17. MISCELLANEOUS

17.1  Each party shall execute and deliver to the other party any documents
      reasonably required to implement any provision hereof.

17.2  Any number of counterparts of this Agreement may be executed and each
      shall have the same force and effect as the original.

17.3  This Agreement may be modified only by an instrument in writing signed by
      duly authorized representatives of all of the parties hereto.

17.4  Delay or failure of either party to enforce all or part of any provision
      of this Agreement, or to require performance by the other party of all or
      part of any provision hereof, shall not be construed as a waiver of such
      provision, or any other provision, or affect the validity of this
      Agreement, any part hereof, or the right of either party thereafter to
      enforce each and every provision.

17.5  All written notices or requests (including without limitation bills
      rendered pursuant to Section 6.2) shall be deemed to have been given or
      made when delivered by mail, similar private carrier, telecopy, or other
      electronic means, to a party at the address shown below its name on the
      signature page hereto, or to such other address as may be hereafter
      designated in writing by such party to the other party.

                                      -16-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002
<PAGE>
Great Bay Power Corporation                                Original Sheet No. 17
First Revised Rate Schedule FERC No. 16

      IN WITNESS WHEREOF, the parties have caused this Agreement to be signed by
their respective authorized officers as of the date first written above.

UNITIL POWER CORP.                         GREAT BAY POWER CORPORATION

By:    /S/ David K. Foote                  By:   /S/ Anthony M. Callendrello

Name:  David K. Foote                      Name:   Anthony M. Callendrello

Title: President                           Title:  Vice President

Address:     6 Liberty Lane West          Address:      51 Dow Highway, Suite 7
             Hampton, NH 03842                          Eliot, ME 03903

                                      -17-
Issued by: Anthony M. Callendrello, Vice President   Effective: November 1, 2002
Issued on: July 31, 2002

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