Document:

Exhibit 10.30

Note: Portions of this exhibit indicated by "[ * ]" are
    subject to a confidential treatment request, and have been omitted from this
    exhibit. Complete, unredacted copies of this exhibit have been filed with
    the Securities and Exchange Commission as part of the Company's confidential
    treatment request.

ADVERSE DEVELOPMENT REINSURANCE AGREEMENT

THIS AGREEMENT is effective on August 4, 2006 (the effective date of the initial public offering of XLCA’s parent, referred to herein as the “IPO Date”) and is made and entered into by and between XL Capital Assurance
Inc., a New York insurer (hereinafter called the “Company” or “XLCA”) and XL Reinsurance America Inc., a New York insurer (hereinafter called the “Reinsurer” or “XLRA”). 

          In consideration of the mutual covenants hereinafter contained and other good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties hereby agree as
follows: 

  ARTICLE I 

  COVERAGE

          Subject to the terms, conditions, and limitations of this Agreement, the Reinsurer agrees to indemnify the Company on an aggregate excess of loss basis for Aggregate Adverse Development up to the
Maximum Liability Amount on the Subject Business (as each such term is defined in Article V). 

          No payments shall be made under this Agreement unless the Company has first paid Ultimate Net Loss in an amount in excess of the Retained Reserves. Under no circumstances shall the total
liability of the Reinsurer under this Agreement exceed the Maximum Liability Amount (as that term is defined in Article V). 

          Nothing herein shall in any manner create any obligations or establish any rights against the Reinsurer in favor of any third parties or any persons not parties to this Agreement except as
provided in Article XIX. 

2

  ARTICLE II

  TERM 

          This Agreement shall remain in full force and effect until the expiry of all liabilities under this Agreement or Commutation as provided for in Article IX. 

          The provisions of this Agreement shall continue to apply to all obligations and liabilities of the parties incurred hereunder to the end that all such obligations and liabilities shall be fully
performed and discharged. 

  ARTICLE III 

  TERRITORY

     The territorial scope of this Agreement shall be worldwide.

  ARTICLE IV 

  [RESERVED]

  

  ARTICLE V 

  DEFINITIONS

          The following definitions shall apply in respect of all use of the defined terms in this Agreement: 

	   	 A.   	 “Aggregate Adverse Development” shall
          mean any increase in Total Incurred (as defined herein) on the Subject
          Business that will result in Ultimate Net Loss in an amount exceeding
        the Retained Reserves.

	 
	 	 B.	 “Affiliate” shall
          mean a person which, directly or indirectly, owns at least 10% but
          less than 50% of the financial guaranty insurance corporation or which
        is at least ten percent but less than fifty percent, directly or

3

	  	 	
  indirectly, owned by a financial guaranty corporation. Such definition is set forth in Section 6901(c) of the New York Insurance Laws and may be amended from time to time.

	 
	 	
C.   	
      RESERVED

	 
	 	
D.	
      RESERVED

	 
	 	
E.	
      “Loss Adjustment Expense” shall
          mean expenses of the Company, including all court costs, fees and expenses;
          fees for service of process; fees to attorneys; cost of undercover
          operative and detective services; fees and expenses for financial advisors,
          attorneys, third party servicers and consultants; fees of independent
          adjusters or attorneys for investigation or adjustment of claims beyond
          initial investigation, cost of employing experts for preparation of
          reports, photographs, diagrams, chemical or physical analysis or for
          advice, opinion or testimony concerning claims under investigation
          or in litigation; costs for legal transcripts of testimony taken at
          coroner's inquests, criminal or civil proceedings; costs for copies
          of any public records; costs of depositions and court reported or recorded
          statements; and any other similar fees; cost or expense reasonably
          chargeable to the investigation, negotiation, settlement or defense
          of a claim or loss or to the protection and perfection of the subrogation
          rights of any insured covered by the policies relating to the Subject
          Business. This amount shall not include overhead expenses of Company
          or salaries or expenses of persons employed by the Company in an administrative
    or supervisory capacity, nor for ordinary office expenses of the Company.

	 
	 	
F.	
      “Maximum Liability Amount” shall mean $100,000,000.

	 
	 	
G.	
      RESERVED

	 
	 	
H.	
      “Retained Reserves” shall mean the Company’s (a) gross case reserves of $[
    * ], calculated as of June 30, 2006 and (b) loss adjustment expense

4

	  	 	
  reserve of $[ * ] arising from the Subject Business as of the IPO Date before giving consideration to this Agreement, after giving consideration to the Third Amended and Restated Facultative Quota Share Reinsurance
  Treaty, dated as of July 1, 2006 (the “XLCA/XLFA Treaty”), between
  XLCA and XL Financial Assurance Ltd , and before giving effect to any other
  third-party reinsurance.

	 
	 	
I.	
      “Subject Business” shall
          mean risks attaching under (a) Financial Guaranty Insurance Policy
    [ * ] and (b) Financial Guaranty Insurance Policy [ * ].

	 
	 	
J.   	
      “Term” shall mean
          the period from the IPO Date until the expiry of all liabilities under
          this Agreement, both days inclusive, in which increases to the Aggregate
    Adverse Development are eligible for coverage under this Agreement.

	 
	 	
K.	
      “Total Incurred” shall
          mean the sum of (i) Ultimate Net Loss paid after the IPO Date plus
    (ii) case reserves for Ultimate Net Loss unpaid.

	 
	 	
L.	
      “Ultimate Net Loss” shall
          mean: (i) the actual amount the Company has paid or has become liable
          to pay and all Loss Adjustment Expenses with respect to the Subject
          Business and (ii) one hundred percent (100%) of the amount of any Extra
          Contractual Obligations and one hundred percent (100%) of the amount
          of any Excess Limits Liability (as each such term is defined in Article
    V), after giving effect to the XLCA/XLFA Treaty, but before any other third-party
          reinsurance and before all salvages and subrogations that are actually
      received by the Company.

	 
	 	 	
  All salvages, recoveries, or payments recovered or received subsequent to a loss settlement under this Agreement shall be applied as if recovered or received prior to the aforesaid settlement and pursuant to Article XIV and
  all necessary adjustments shall be made by the parties hereto, provided always that nothing in this definition shall be construed to mean

5

	       	that Ultimate Net Loss under this Agreement is
    not recoverable until the Company’s Ultimate Net Loss has been ascertained. 

ARTICLE VI 

EXTRA CONTRACTUAL OBLIGATIONS AND EXCESS LIMITS LIABILITY

          This Agreement shall cover any losses arising from Extra Contractual Obligations and Excess Limits Liability. 

          “Extra Contractual Obligations” as used in this Agreement shall mean those liabilities not covered under any other provision of this Agreement, including third party claims against the
Company, which arise from the handling of any claim on business covered hereunder; such liabilities arising because of, but not limited to, the following: failure to settle within the limit of the policies relating to the Subject Business, by reason
of alleged or actual negligence, fraud, or bad faith in rejecting an offer of settlement, in the preparation of the defense, in the trial of any action against the insured or reinsured, or in the preparation or prosecution of an appeal consequent
upon such action, all as determined by the Company in its sole discretion. 

          “Excess Limits Liability” as used in this Agreement shall mean damages payable in excess of the limit of the policies relating to the Subject Business as a result of alleged or actual
negligence, fraud, or bad faith in failing to settle and/or rejecting a settlement within the limit of the policies relating to the Subject Business, in the preparation of the defense, in the trial of any action against the insured or reinsured, or
in the preparation or prosecution of an appeal consequent upon such action.  Excess Limits Liability is any amount for which the Company would have been contractually liable to pay, as determined by the Company in its sole discretion, had it not
been for the limits of the reinsured policy. 

6

          The date on which any Extra Contractual Obligation and/or Excess Limits Liability is incurred by the Company shall be deemed, in all circumstances, to be the date of the original loss. 

          In the event any provision of this Article VI is rendered illegal or unenforceable by the laws, regulations, or public policy of any jurisdiction, such provision shall be considered void as
respects that jurisdiction only, and such a consideration shall not affect the validity or enforceability of any other provision of this Article VI in that jurisdiction nor the enforceability of such provision in any other jurisdiction. 

          In no event shall coverage be provided to the extent that such coverage is not permitted under New York Law. 

  ARTICLE VII 

  REINSURANCE PREMIUM

          In consideration of coverage provided hereunder, the Company shall pay to the Reinsurer Reinsurance Premium on an installment basis in accordance with Schedule A. 

  ARTICLE VIII

  [RESERVED]

  

  ARTICLE IX 

  COMMUTATION

          This Agreement may be commuted upon the mutual agreement of the Parties and the approval of the New York Department of Insurance. Upon any commutation the Reinsurer will receive a full and final
release from all past, current and future liability under or related to this Agreement. 

7

  ARTICLE X 

  REPORTS AND REMITTANCES

	 	 	 
	  	
A.   	
      As respects the Subject Business, the Company shall furnish to the Reinsurer within forty-five (45) days after the end of each calendar quarter:

	 
	 	 	
1.     	
      The quarterly account of Ultimate Net Loss paid as of the end of the calendar quarter and on a cumulative basis from the effective date of this Agreement; and

	 
	 	 	
2.	
      The Company’s estimate
          of case reserves for Ultimate Net Loss unpaid as of the end of the
    calendar quarter.

	 
	 	
B.	
      Within thirty (30) days following
          receipt of Company’s quarterly report as called for above, the
          Reinsurer shall pay to the Company the positive amount, if any, by
          which paid Ultimate Net Loss from the effective date of this Agreement
          through the end of the calendar quarter, both dates inclusive, exceed
          the Retained Reserves, minus any Ultimate Net Loss (net of any Ultimate
          Net Loss overpayments paid by the Company) previously paid by the Reinsurer
          under this Agreement. If the Reinsurer shall dispute the amount owing
          by the debtor party as set forth in the report, the debtor party nevertheless
          shall pay the amount in dispute to the creditor party as provided in
          this paragraph pending resolution of the dispute as provided in this
    Agreement.

	 
	 	
C.	
      Notwithstanding the foregoing,
          at the option and upon the demand of the Company, when the amount due
          in the aggregate as a result of any payment(s) on a claim under the
          policies relating to the Subject Business (“Policy
  Payment”) exceeds US $500,000., the Company shall be paid by special
  remittance within five (5) business days upon receipt of a special

8

	  	 	
  account, which shall be prepared by the Company and shall contain all relevant details in connection with the claim.

	 
	 	
D.   	
      If the Reinsurer is required to post security pursuant to Article XVIII, the quarterly report shall include the amount of security required.

	 
	 	
E.	
      In addition to the foregoing,
          as soon as reasonably possible following the end of each calendar year,
          at the Reinsurer’s request the Company shall provide the Reinsurer with a copy of the Company’s
    Annual Report and/or statutory Annual Statement.

ARTICLE XI 

LOSS SETTLEMENTS AND LOSS ADJUSTMENT EXPENSES

          The Company shall be the sole judge as to what shall constitute a claim or loss covered under the Subject Business.  The Company shall, in its sole discretion, monitor, evaluate, negotiate,
adjust, investigate, settle, defend or compromise all claims or potential claims and all losses or potential losses, including Extra Contractual Obligations and Excess Limits Liability.  All such negotiations, adjustments, investigations, settlements, defenses and compromises shall be unconditionally binding on the Reinsurer.  In addition to amounts paid in settlement of losses, the Reinsurer shall be liable for its
proportionate share of all reasonable Loss Adjustment Expenses. The Reinsurer shall have the right, at its own expense and upon prior written notice to the Company, to become associated in any suit, litigation or action relating to the Subject
Business and retain counsel and advisors of their own choice. 

          The Company or the Reinsurer, as the case may be, shall at all times use reasonable best efforts to keep the Reinsurer or the Company, as the case may be, apprised of the status of any material
events with respect to the Subject Business. 

9

          Further, the Company shall provide, without limitation, the following surveillance services to the Reinsurer as part of the Company’s discharging of its own obligations under the policies
for the benefit of the Company and consistent with its fiduciary duties to its reinsurers: (a) preparation for and with the consent of the Reinsurer, representation of the interest of the Reinsurer at and follow up on matters arising from any
meetings with third parties relating to the Subject Business; (b) participation in quarterly reserving work-up discussions to develop a recommendation on reserves related to the Subject Business; and (c) preparation of reports as necessary to update
the Reinsurer on workout matters. The Reinsurer shall be liable for its share of all reasonable Loss Adjustment Expenses paid or incurred by the Company in connection with such surveillance services. 

  ARTICLE XII 

  FOLLOW THE FORTUNES

	 	 	 
	  	
A.   	
      The Reinsurer’s liability
          shall attach simultaneously with that of the Company and shall be subject
          in all respects to the same risks, terms, rates, conditions, interpretations,
          assessments, waivers, the exact proportion of premium paid to the Company
          without any deductions for brokerage and to the same modification,
          alterations and cancellations as the policies, the true intent of this
          Agreement being that the Reinsurer shall, in every case to which this
          Agreement applies, follow the underwriting fortunes of the Company
          and the Reinsurer shall be bound, without limitation, by any payments
    and settlements entered into by the Company in good faith.

	 
	 	
B.	
      Nothing shall in any manner create any obligations or establish any rights against the Reinsurer in favor of any third parties or any persons not parties to this Agreement.

10

  ARTICLE XIII

  OFFSET 

          In the event of insolvency of either the Company or the Reinsurer, offset shall be permitted in accordance with the terms of this Article and as otherwise permitted by Section 7427 of the
Insurance Law of the State of New York. Subject to the foregoing, each party hereto shall have, and may exercise at any time and from time to time, the right to offset any balances, whether on account of premiums or on account of losses or
otherwise, due from such party to the other party hereto under this Agreement or under any other agreement heretofore or hereafter entered into by and between them, and may offset the same against any balance or balances due or to become due to the
former from the latter under the same or any other agreement between them; and the party asserting the right of offset shall have and may exercise such right whether the balance or balances due or to become due to such party from the other are on
account of premiums or on account of losses or otherwise and regardless of the capacity, whether as Company or as Reinsurer, in which each party acted under the agreement or, if more than one, the different agreements involved. 

  ARTICLE XIV 

  SALVAGE AND SUBROGATION

           In the event of any salvage and/or subrogation received in respect of claims and settlements under the policies relating to the Subject Business, the salvage and/or subrogation shall be coordinated under this and other
applicable reinsurance of the Subject Business by reference to the order of Company’s reinsurance cessions under the definition of Article V H, Retained Reserves. First, the salvage and/or subrogation shall be paid with respect to the
reinsurance contract or contracts which are obligated to pay Company first on the Subject Business for amounts in excess of that reinsurer’s held reserves as of

11

June 30, 2006 (the “Held Reserves”).  Once such amounts paid by such reinsurers in excess of their respective Held Reserves have been fully reimbursed, any additional subrogation and/or salvage shall then be applied
to the amount of each such reinsurer’s Held Reserves, starting with the reinsurer of the Subject Business whose obligation to pay Company occurs last and proceeding to the reinsurer so obligated to pay first.  If two or more reinsurers have
obligations to pay Company on the Subject Business which occur simultaneously, the subrogation and/or salvage shall be divided between them in proportion to the amount each of them is obligated to pay as a part of the amount of their combined
obligation to pay. 

           The Company hereby agrees to enforce such subrogation rights as it may obtain by virtue of payments made under the policies relating to the Subject Business, but in case it shall refuse or neglect to do so, Reinsurer is
hereby authorized and empowered to bring any appropriate action to enforce such rights. 

           All subrogation recoveries, other recoveries, salvage or payments made subsequent to the payment of claims hereunder shall be applied as if made before such payment of claims and shall be made as soon as practicable.

  ARTICLE XV 

  DELAYS, ERRORS, AND OMISSIONS

          Any inadvertent delay, error, or omission made in connection with this Agreement or any transaction hereunder shall not relieve either party from any liability that would have attached had such
delay, error, or omission not occurred, provided that any error or omission is rectified as soon as reasonably practical. 

12

ARTICLE XVI 

  AMENDMENTS AND ALTERATIONS

          This Agreement may be changed, altered, or amended as the parties may agree, provided such change, alteration, or amendment is evidenced in writing or by endorsement executed by the Company and
  the Reinsurer and provided further that any such change, alteration or amendment has been previously filed for approval with the Superintendent of the New York Insurance Department for his review and non-objection thereto. 

  ARTICLE XVII 

  ACCESS TO RECORDS

          Provided the Reinsurer gives at least fifteen (15) days prior written notice, it or its designated representatives, provided such representatives are reasonably acceptable to the Company, shall
have the right to inspect at any reasonable time, in the office of the Company where the files are located, all records of the Company that pertain in any way to this Agreement; the Reinsurer’s right of inspection shall survive expiration or
cancellation of this Agreement, so long as any claim or premium matters remain outstanding. 

          All non-public information provided in the course of the inspection shall be kept confidential by the Reinsurer as against third parties, except as respects any obligation to do so by law or
contract. 

  ARTICLE XVIII 

  RESERVES AND FUNDING

	  	 	 
	 	
A.   	
      Reinsurer hereby agrees to establish reserves for the policies relating to the Subject Business being reinsured under this Agreement in accordance with the requirements of Article 69 of the New York Insurance Laws. With
  respect to the Subject Business, the Company agrees that, when it files with the Insurance Department or sets up on its books

13

	  	 	
  reserves for losses (including loss and loss expense paid by the Company but not recovered from the Reinsurer, and loss and loss expense reported and outstanding) and unearned premium, which it is required by law to set up,
  it shall forward to the Reinsurer a statement showing the proportion of such reserves applicable to it.

	 
	 	
B.   	
      The Reinsurer shall take all steps necessary to comply with the provisions of Article 69 of the New York Insurance Laws and all applicable laws and regulations so as to permit the Company to obtain full credit on its
  statutory financial statements for the reinsurance provided by this Agreement in all applicable jurisdictions, including, without limitation, compliance with Section 6906 of the New York Insurance Law, to the extent credit is not otherwise available
  under applicable law or regulations. It is understood and agreed that any term or condition required by such law or regulation to be included in this Agreement for the Company to receive financial credit for the reinsurance provided by this
  Agreement shall be deemed to be incorporated in this Agreement by reference.

	 
	 	
C.	
      If the Company is unable to take credit on its statutory statements for the reinsurance provided by this Agreement, the Reinsurer will post security in the form of a Letter of Credit and/or Trust Account in an amount and in a
  form which will entitle the Company to obtain such credit under the New York insurance laws and regulations.

14

  ARTICLE XIX

  INSOLVENCY

          In the event of the insolvency of the Company and the appointment of a liquidator, receiver, conservator or statutory successor, reinsurance due under this Agreement shall be payable with
reasonable provision for verification, on the basis of the liability of the Company resulting from claims allowed against the Company by any court of competent jurisdiction or by any liquidator, receiver, conservator or statutory successor having
authority to allow such claims without diminution because of such insolvency or because such liquidator, receiver, conservator or statutory successor has failed to pay all or a portion of any claims. 

          Payments by the Reinsurer as set forth above shall be made directly and exclusively to the Company or to its liquidator, receiver, conservator or statutory successor except as provided by
subsection (a) of section 4118 of New York Insurance Law or except (a) where this Agreement specifies another payee in the event of the insolvency, or (b) the Reinsurer, with the consent of the direct insureds, has assumed such policy obligations of
the Company as direct obligations to the payees under such policies in substitution for the obligations of the Company to such payees. 

          In the event of the insolvency of the Company, the liquidator, receiver, conservator or statutory successor shall give written notice of the pendency of a claim against the Company under policies
reinsured within a reasonable time after such claim is filed in the insolvency proceeding.  During the pendency of such claim, the Reinsurer has the right but not the duty to investigate said claim and interpose in the proceeding where the claim is
to be adjudicated, at its own expense, any defense or defenses that it may deem available to the Company, or its liquidator, receiver, conservator or statutory successor.  The expense thus incurred by the Reinsurer will be chargeable against the
Company, subject to court approval, against the insolvent Company as part of the expense of

15

liquidation to the extent of a proportionate share of the benefit which may accrue to the Company solely as a result of the defense undertaken by the Reinsurer. Where two or more reinsurers are involved in the same claim and
a majority in interest elects to interpose defense to such claim, the expense shall be apportioned in accordance with the terms of this Agreement as though such expense had been incurred by the Company.  Should the Company go into liquidation or
should a receiver be appointed, the Reinsurer will be entitled to exercise any offset rights specifically provided by this Agreement and to offset any other sums permitted under applicable law. 

  ARTICLE XX 

  ARBITRATION

          Any and all disputes or other matter in question relating to this Agreement, including its formation, interpretation and performance or breach of this Agreement, whether the dispute arises before
or after the termination of this Agreement, shall be resolved by a panel of three arbitrators and such arbitration shall be initiated at the written request of either party within a reasonable time after dispute has arisen.

          The members of the panel shall be US citizens and shall be active or retired disinterested officers of insurance or reinsurance companies. 

          An arbitrator shall be chosen by each party and the two so chosen shall choose the third. If either party fails to appoint an arbitrator within thirty (30) days of being requested to do so by the
other party, the requesting party may choose both arbitrators who shall choose the third. In the event the two arbitrators are unable to agree upon the third arbitrator within thirty (30) days of their appointment each of them shall name five, of
whom the other shall decline four and the decision shall be made by drawing lots. 

16

          The party requesting arbitration shall submit its case within thirty (30) days of the selection of the third arbitrator and the respondent shall submit its case thirty (30) days thereafter or as
otherwise extended by the arbitration panel. The panel shall make its decision with regard to the custom and practice of the applicable insurance and reinsurance business. The panel shall not be obligated to follow all judicial formalities and may
abstain from following the strict rules of evidence and procedure except to the extent required by governing law. 

          Each party shall bear the expenses of the arbitrator it selected and shall share equally with the other in the expenses of the third arbitrator and the arbitration. The panel shall issue its
decision as promptly as possible following the completion of a hearing, if there is one, but in no event may punitive damages be awarded. The majority decision of the arbitrators shall be final and binding upon all parties to the proceeding.
Judgment may be entered upon the award of the panel in any court having jurisdiction thereof. In no event will the panel award punitive, exemplary or enhanced compensatory damages. 

          The arbitration shall take place in New York, New York.

  ARTICLE XXI

  RATING OF THE REINSURER

          If the Reinsurer is downgraded by Standard and Poor's or Moody's Investors Service (a "Downgrade") and as a result of such Downgrade, the Company is receiving less financial credit from a rating
agency with respect to the reinsurance provided by this agreement than it did prior to the Downgrade, the parties will work together and take reasonable steps to ensure that the Company receives financial credit for the reinsurance from the
applicable rating agency to the same extent as it did prior to the Downgrade.

17

ARTICLE XXII 

COVENANTS OF THE REINSURER

The Reinsurer hereby covenants that it: 

	  	
A.   	
      has and shall maintain surplus
    to policyholders of at least thirty-five million dollars (US $35,000,000);

	 
	 	
B.	
      shall establish and maintain the reserves required in Section 6903 of New York's Insurance Laws or any or any succeeding statutory provision, as such may be amended, modified or interpreted from time to time in any
  regulation, bulletin or opinion promulgated by the New York Department of Insurance;

	 
	 	
C.	
      shall comply with the provisions of Section 6904(c) of New York's Insurance Laws (except that the maximum total exposures reinsured net of retrocessions and collateral shall be one-half of that permitted for a New York
  financial guaranty insurance corporation thereunder);

	 
	 	
D.	
      for so long as the Reinsurer
          is either a parent of the insurer, another subsidiary of the parent
          of the insurer, or a subsidiary of the insurer (Section 6904(d) of
          New York’s Insurance Laws provides that direct or
  indirect ownership interests of fifty percent or more shall be deemed a parent/subsidiary
          relationship), the aggregate of all risks assumed by the Reinsurer
          shall not exceed ten percent of the Company's exposures, net of retrocessions
    and collateral;

	 
	 	
E.	
      in the event that the Reinsurer is an Affiliate of the Company, shall not assume a percentage of the Company's total exposures insured net of retrocessions and collateral in excess of its percentage of equity interest in the
  Company; and

18

	  	
F.   	
assumes, together with all other reinsurers of the Company subject to Section 6906(a)(2)(F) of New York's Insurance Law, less than fifty percent of the total exposures insured net of collateral remaining after deducting any
reinsurance placed with another financial guaranty insurance corporation or an insurer writing only financial guaranty insurance as is or would be permitted by Article 69 of New York's Insurance Law.

ARTICLE XXIII 

GOVERNING LAW

          This Agreement shall be governed by and construed according to the internal laws of the State of New York without giving effect to the principles of conflicts of laws thereof.

  ARTICLE XXIV

  CURRENCY 

          The currency to be used for all purposes of this Agreement shall be the currency of the United States of America.  And the sign “$” in this Agreement refers to United States of
America dollars. 

ARTICLE XXV

COMMUTATION OF OTHER REINSURANCE 

          The Company must give prior written notice to the Reinsurer and the Reinsurer must consent in writing to the commutation of any reinsurance provided by the XLCA/XLFA Treaty with respect to the
Subject Business. 

19

ARTICLE XXVI 

NOTICE 

           All notices (including, without limitation, notices of cancellation, commutations or amendments to policies relating to the Subject Business), requests, demands, approvals and other communications under this Adverse
Development Reinsurance Agreement shall be in writing and shall be delivered personally, sent by facsimile transmission or sent by certified, registered or express mail, postage prepaid or sent by overnight courier or sent by email to an address
specified by one party to the other party in writing. Any such notice or other communication shall be deemed given:  (a) upon actual delivery if presented personally or sent by overnight delivery or by facsimile transmission or sent by email and (b)
three (3) business days following deposit in the United States mail, if sent by certified, registered or express mail, postage prepaid, in each case to the following addresses: 

	                    	
If to Company: 
	
	 	 

	
	 	
XL Capital Assurance Inc. 
	
	 	
1221 Avenue of the Americas, 31st Floor 
	
	 	
New York, New York 10020 
	
	 	
Attn: General Counsel 
	
	 	
Fax: (212) 478-3579 
	
	 	 

	
	 	 

	
	 	
If to Reinsurer: 
	
	 	 

	
	 	
XL Reinsurance America Inc. 
	
	 	
Seaview House 
	
	 	
70 Seaview Avenue 
	
	 	
Stamford, CT 06902 
	
	 	
Attention: General Counsel 
	
	 	
Fax: (203) 964-5309 
	

20

  ARTICLE XXVII

  ASSIGNMENT 

          This Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns and legal representatives. This Agreement is not assignable except
by operation of law or by mutual consent of the parties hereto; such consent not to be unreasonably withheld. 

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed in duplicate by their duly authorized representatives. 

	          	Signed at New York, New York

      

XL Reinsurance America Inc.

By: /s/ Steven P. Agosta                                

Name Printed: Steven P. Agosta                

Title: VP, General Counsel & Secretary      

Signed at New York, New York

XL Capital Assurance Inc. 

By: /s/ Drew D. Hoffman                     

Name Printed: Drew D. Hoffman     

Title: Senior Managing Director        

21

Schedule A 

Schedule of Premium Payments

[ * ]

 

22STOCK PURCHASE AGREEMENT
                                      Among
          NATIONAL HEALTH CARE TECHNOLOGY, INC., a Colorado Corporation
           SOON TO BE KNOWN AS BRIGHTON OIL, INC., Nevada Corporation
                                  ("PURCHASER")
                                       And
                       CASTLE OIL AND GAS, LLC ("SELLER")

<PAGE>

This STOCK PURCHASE  AGREEMENT,  is made as of August 24, 2006 (the Agreement"),
between National Health Care Technology, Inc., a Colorado Corporation soon to be
known as Brighton Oil, Inc., a Nevada corporation,  ("Brighton" or "Purchaser"),
and Castle Oil and Gas, LLC, a Colorado Limited Liability Company, (Castle).

         WHEREAS,  the  respective  Boards of Directors of the Purchaser and the
unanimous  consent of the Members of the Seller have  approved the terms of this
Agreement and of the transactions contemplated hereby; and

          WHEREAS,  Seller  desires to sell all of the  membership  interest  of
Seller, and

         WHEREAS,  the Seller and Purchaser desire to set forth the terms of the
agreement in connection with the transactions provided for herein; and

         WHEREAS,   the  Initial  Closing   (Closing  #1)  of  the  transactions
contemplated  by this  Agreement  will take  place  upon the  execution  of this
Agreement;

         NOW, THEREFORE,  in consideration of the promises and  representations,
warranties and agreements herein contained, the parties hereto agree as follows:

                             ARTICLE 1 - DEFINITIONS

Definitions.  As used  herein,  the  following  terms  shall have the  following
meanings:

          "Agreement" has the meaning  specified in the  introductory  paragraph
above.

         "Ancillary Documents" as to any Person means all agreements,  releases,
certificates  and other  documents  contemplated by this Agreement to be entered
into or executed by such  Person;  and where a reference  to a Person is made in
conjunction with a reference to "Ancillary Documents," the term shall refer only
to such documents which such Person has entered into or executed.

         "Closing" has the meaning specified in Section 3.01 hereof.

         "Closing Date" has the meaning specified in Section 3.01 hereof.

                                      -2-
<PAGE>

         "Code" means the Internal Revenue Code of 1986, as amended.

         "Common Stock" means the common stock of the Seller.

         "Damages" has the meaning specified in Section 6.02 hereof.

         "Governmental Entity" has the meaning specified in Section 4.02 hereof.

         "Knowledge"  means, with respect to any Person, (i) actual knowledge of
such Person  (including the actual knowledge of the officers,  directors and key
employees  of such  Person)  and (ii)  actual  knowledge  that  could  have been
acquired by such Person  after making such due inquiry and  exercising  such due
diligence  as a  prudent  businessperson  would  have made or  exercised  in the
management of his or her business affairs in light of the circumstances.

         "Laws"  means all  applicable  common law and any statute,  law,  code,
ordinance, regulation, rule, resolution, order, determination, writ, injunction,
award (including,  without limitation,  any award of any arbitrator),  judgments
and  decrees  applicable  to  the  specified  persons  or  entities  and  to the
businesses and assets thereof.

         "Person"  means a natural  person,  corporation,  partnership  or other
business entity, or any Governmental Entity.

         "Purchaser"  has the meaning  specified in the  introductory  paragraph
above.

         "SEC" means the Securities and Exchange Commission.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Seller" has the meaning specified in the introductory paragraph above.

         "Tax" and  "Taxes"  shall mean all  federal,  state,  local and foreign
property,  sales and use, payroll,  withholding,  franchise and income taxes and
all assessments,  rates, levies, fees and other governmental charges,  including
any interest and penalties in respect of such amounts.

                           ARTICLE 2 - PURCHASED STOCK

         2.01 Purchase and Sale of Stock. Subject to the terms and conditions of
this  Agreement  and in reliance upon Seller's  representations  and  warranties
contained  herein,  at Closing,  Seller  shall,  convey,  assign,  transfer  and
deliver,  and  Purchaser  shall  acquire  100%  of the  issued  and  outstanding
memberships of the company for a price of Two Million Dollars ($2,000,000).  The
price shall be paid in free trading stock at a value of One Dollar per share.

         2.02.  Purchase  Price.  The  Purchase  price  shall  be for the sum of
$2,000,000,  which will be paid in  accordance  with Section  2.01 above.  It is
agreed that Seller will  transfer all of the issued and  outstanding  membership

                                      -3-
<PAGE>

interests of the company in exchange for Two Million shares of Brighton Oil Inc.
That stock in Brighton is valued at One Dollar per share and the shares are free
trading.

                   ARTICLE 3 - THE CLOSING; ACQUISITION PRICE

         3.01  Closing.  The  closing  (Closing  #2)  shall  consist  of  Seller
obtaining their shares and Purchaser obtaining their membership interests in the
transaction. It is agreed that the closing (Closing #2) shall occur on or before
November  30,  2006.  It is the sole right of the Seller to  determine  prior to
close  (Closing  #2) if the  shares  which are  being  tendered  to  Seller  are
sufficient in value to close the purchase.

         3.02  Closing  #2.  Castle  Oil and Gas,  LLC owns  the  website  (URL)
www.castleoilandgas.com  . It shall continue to host, own, control and maintain,
at its current level of service,  this website  until  closing #2.  BRIGHTON OIL
INC. may suggest  changes to the website prior to closing #2, but changes to the
website shall be in the sole discretion of Castle Oil and Gas, LLC until closing
#2. At the time of closing #2, the  ownership of the domain will be  transferred
to BRIGHTON OIL INC. by registration  with an international  domain registrar of
BRIGHTON OIL INC. choosing. The IT resources to complete this transition will be
provided  by Castle  Oil and Gas,  LLC,  with a maximum of 10 hours of IT labor.
Castle Oil and Gas, LLC will transfer all its outstanding  membership  interests
to BRIGHTON OIL INC. at closing #2. Castle Oil and Gas, LLC represents  that all
of its  outstanding  and  authorized  memberships  are  owned  by  Dana  Veitch,
Christopher T. Sayre and Steven W. Hickox,  one third,  one third and one third.
At  closing #2  BRIGHTON  OIL INC.  shall  transfer  to Castle Oil and Gas,  LLC
$2,000,000.00  worth of "free trading stock." The decision on whether to conduct
closing #2 shall be in the sole discretion of Castle Oil and Gas, LLC.

                   ARTICLE 4 - REPRESENTATIONS AND WARRANTIES
                                    OF SELLER

         Seller hereby represents and warrants to Purchaser as follows:

         4.01 Organization, Good Standing and Foreign Qualification. Seller is a
Colorado limited  liability company duly formed and validly existing and in good
standing  under the laws of.  Seller or its  Subsidiaries  are duly  licensed or
qualified to do business as a foreign  corporation and is in good standing under
the laws of each other  jurisdiction  in which the  character of the  properties
owned or leased by it therein or in which the transaction of business makes such
qualification necessary, except where the failure to so qualify would not have a
material adverse effect on Sellers.

         4.02 Authority  Relative to Agreements.  Subject to Seller's receipt of
members  approval  ("Members  Approval")  for the sale of Shares  in the  Second
Closing,  Seller has the requisite  corporate  power and authority to enter into
this Agreement and all Ancillary  Documents,  and to carry out their obligations
hereunder and thereunder.  The execution and delivery of this Agreement and each

                                      -4-
<PAGE>

Ancillary Document, and the consummation of the transactions provided for herein
and therein,  have been duly authorized by the unanimous  consent of the Members
of Seller and does not  violate  any  provision  of the  respective  Articles of
Organization or Operating Agreement of Seller or its Subsidiaries. The execution
by Seller of this Agreement and each  Ancillary  Document,  and,  subject to the
receipt of Members Approval,  the consummation of the transactions  provided for
hereby  and  thereby,  will not  conflict  with or effect a  breach,  violation,
default,  or cause an event of  default,  under any  mortgage,  lease,  or other
material agreement or instrument, or any statute, regulation, order, judgment or
decree to which  Sellers  are a party or by which they are bound,  or any law or
governmental  regulation  applicable  to Seller,  or require  the consent of any
Person  (other  than  the  parties  to this  Agreement).  Without  limiting  the
generality of the foregoing, and except for Seller's receipt of Members Approval
and the filing with the SEC and  delivery to  Seller's  Members of the  required
proxy/information  statement, no notices,  reports or other filings are required
to be made by  Seller  with,  nor are any  consents,  registrations,  approvals,
permits or authorizations required to be obtained by Seller from, any government
or governmental,  regulatory or administrative  authority or agency, domestic or
foreign (each, a  "Governmental  Entity"),  in connection with the execution and
delivery  of this  Agreement  by Seller  and the  consummation  by Seller of the
transactions  contemplated by this Agreement and the Ancillary  Documents.  This
Agreement  and the  Ancillary  Documents  constitute  legal,  valid and  binding
obligations  of Seller,  enforceable in accordance  with their terms,  except as
enforcement  thereof may be limited by  applicable  bankruptcy,  reorganization,
insolvency, moratorium or other laws affecting rights of creditors generally and
general principles of equity, whether applied at law or in equity.

         4.03 Tax Matters. To the best Knowledge of Seller,  Seller has duly and
timely filed all tax returns and reports  required to be filed by Seller and its
Subsidiaries prior to Closing,  except to the extent that any failure or alleged
failure  to file any Tax  return or report  would  not have a  material  adverse
effect on Seller or the Acquired Assets. All of Sellers' tax returns and reports
are true and complete in all material respects.  Seller has paid all taxes shown
to be due on the aforesaid tax returns and reports.

         4.04. Litigation.  There is no prosecution,  suit, action,  arbitration
proceeding  or  governmental  proceeding  pending,  or to the best  Knowledge of
Seller,  threatened,  against or  affecting  Seller or its  Subsidiaries  or the
transactions  contemplated by this Agreement.  There is not outstanding  against
Seller or its Subsidiaries any decision,  judgment, decree, injunction,  rule or
order of any court, arbitrator or Governmental Entity.

         4.05. Brokers.  Purchaser shall not have any obligation or liability to
pay any fee or other  compensation to any Person engaged by Seller in connection
with this Agreement and the transactions contemplated hereby.

         4.06. True Copies. All copies of documents  delivered or made available
to Purchaser in connection  with this  Agreement are true and correct  copies of
the originals thereof.

                                      -5-
<PAGE>

         4.07.  Compliance with Law.  Seller is in material  compliance with all
federal,  state and local laws,  regulations  and  ordinances  applicable to its
business and operations.

         4.08.  Intellectual  Property. The best Knowledge of Seller, Seller and
its Subsidiaries owns, or are licensed or otherwise possess legally  enforceable
rights  to use  its  Intellectual  Property,  free  and  clear  of all  material
encumbrances.  Seller does not have any  Knowledge and Sellers have not received
any  notice to the  effect  that (i) the use of the  Intellectual  Property  may
infringe on any intellectual  property right or other legally  protectable right
of another,  or (ii) any Person is using any  patents,  copyrights,  trademarks,
service  marks,  trade  names,  trade  secrets  or  similar  property  that  are
confusingly similar with the Intellectual Property. Sellers have not granted any
license or other  right to any other  Person  with  respect to the  Intellectual
Property.   To  the  best  of  Sellers'  Knowledge,   the  consummation  of  the
transactions  contemplated  by this Agreement will not result in the termination
or impairment of any of the or Intellectual Property. Seller is not aware of any
reason that would prevent any pending trademark, service mark, copyright, patent
or  other  intellectual  property  applications  required  for  the  use  of the
Intellectual Property from having registration granted.

         4.09 Disclosure.  No  representation  or warranty by Sellers in, and no
document,  statement,  certificate,  schedule  or  exhibit  to be  furnished  or
delivered to Purchaser  pursuant to, this Agreement contains or will contain any
material  untrue or misleading  statement of fact or omits or will omit any fact
necessary  to make the  statements  contained  herein or therein not  materially
misleading.  No press  releases,  or disclosure  will be made by either party to
this agreement without the written release from each party to this agreement.

             ARTICLE 5 - REPRESENTATIONS AND WARRANTIES OF PURCHASER
         Purchaser hereby represents and warrants to Seller as follows:

         5.01.  Organization and Good Standing.  Purchaser is a corporation duly
organized,  validly existing and in good standing under the laws of the State of
Nevada and is duly  qualified and in good standing as a foreign  corporation  in
each  jurisdiction  where the failure to be so  qualified  would have a material
adverse effect on Purchaser.

             ARTICLE 6 - SURVIVAL OF REPRESENTATIONS AND WARRANTIES;
                                 INDEMNIFICATION

         6.01. Survival of Representations and Warranties of the Parties. Except
as  provided  in Section  6.02 and the tax  obligations  set forth  herein,  all
representations  and  warranties  made by any  party  hereto  contained  in this
Agreement or in any Ancillary Document,  and the indemnification  obligations of
each party hereto with respect to representations and warranties,  shall survive

                                      -6-
<PAGE>

for a period ending two years  following the Closing Date.  Notwithstanding  the
foregoing,  the  representations and warranties relating to Section 4.03 hereof,
and  the  indemnity   obligations  with  respect  to  such  representations  and
warranties,  shall  remain  operative  and in full  force and  effect  until the
expiration of the applicable statute of limitations.

         6.02.  Indemnification  by  Purchaser.  Purchaser  hereby agrees not to
indemnify  and hold  Seller  harmless  from and  against  any  damages,  losses,
liabilities, deficiencies, costs and/or expenses (including all reasonable legal
fees,  expenses  and  other  out-of-pocket  costs)   (collectively,   "Damages")
resulting  from,  arising  out  of or in  connection  with  or  related  to  the
transactions  under  this  Agreement  whether  or not any  such  Damages  are in
connection  with any  action,  suit,  proceeding,  demand or judgment of a third
party (including Governmental Entities).

                      ARTICLE 7 - CONDITIONS TO THE CLOSING

         7.01.  Condition  to  Obligations  of  Purchaser.  The  obligations  of
Purchaser  to close the  transactions  contemplated  hereby  are  subject to the
satisfaction of the following condition: The representations and warranties made
by Sellers in Section 4 hereof shall be true and correct when made, and shall be
true and correct in all  material  respects  on the  Closing  Date with the same
force and effect as if they had been made on and as of said date.

         7.02.  Audit  Procedures:  Closing  will occur after  Purchaser  audits
Seller's books under SEC and GAAP guidelines.

                             ARTICLE 8 - THE CLOSING

         At the Closing,  the parties shall deliver the following  documents and
instruments and take the following actions:

         8.01.  Closing . Seller shall  deliver  certificates  representing  the
Shares and Purchaser  shall deliver the membership  interests which are outlined
in this agreement.

         8.02.  Transfer of Title.  Seller shall deliver the stock which will be
transferred to Purchaser upon the close of the transaction..

                        ARTICLE 9 - ADDITIONAL AGREEMENTS

         9.01.  Agreements As to Tax Matters. The parties to this Agreement will
cooperate fully with each other, in connection with the preparation, signing and
filing of tax returns and in any  administrative,  judicial or other  proceeding
involving taxes relating to the Acquired Assets.

                                      -7-
<PAGE>

         9.02.  Post-Closing  Documents.  The parties hereto will cooperate with
one another after Closing and, without any further  consideration,  will execute
and deliver  such other  documents  as shall be  reasonably  required  after the
Closing  to  transfer  title to the  Shares to  Purchaser  and to take any other
action necessary to carry out the intent and purposes of this Agreement.

         9.03. Notice. Each party shall notify the others of any claim,  demand,
action, suit or proceeding relating to or arising in connection with, the Shares
as soon as practicable after learning of such claim,  demand,  action,  suit, or
proceeding.

                         ARTICLE 10 - GENERAL PROVISIONS

         10.01. Expenses. Each party shall pay its own expenses (including legal
and  accounting   costs  and  expenses)  in  connection  with  the  negotiation,
preparation and consummation of this Agreement and the Ancillary Documents,  and
the transactions contemplated hereby and thereby.

         10.02.   Governing Law; Waiver of Jury Trial. All questions  concerning
                  the   construction,   interpretation   and  validity  of  this
                  Agreement  shall be governed by and  construed and enforced in
                  accordance  with the domestic  laws of the State of California
                  without  giving  effect  to  any  choice  or  conflict  of law
                  provision or rule  (whether in the State of  California or any
                  other  jurisdiction)  that would cause the  application of the
                  laws of any  jurisdiction  other than the State of California.
                  In furtherance of the foregoing, the internal law of the State
                  of California will control the interpretation and construction
                  of this Agreement, even if under such jurisdiction's choice of
                  law or conflict of law analysis,  the  substantive law of some
                  other jurisdiction would ordinarily or necessarily apply.

         BECAUSE   DISPUTES   ARISING  IN  CONNECTION  WITH  COMPLEX   FINANCIAL
TRANSACTIONS  ARE MOST QUICKLY AND  ECONOMICALLY  RESOLVED BY AN EXPERIENCED AND
EXPERT  PERSON  AND THE  PARTIES  WISH  APPLICABLE  LAWS TO APPLY  (RATHER  THAN
ARBITRATION  RULES),  THE PARTIES  DESIRE  THAT THEIR  DISPUTES BE RESOLVED BY A
JUDGE APPLYING SUCH APPLICABLE LAWS. THEREFORE,  TO ACHIEVE THE BEST COMBINATION
OF THE BENEFITS OF THE JUDICIAL  SYSTEM AND OF  ARBITRATION,  THE PARTIES HERETO
WAIVE ALL RIGHT TO TRIAL BY JURY IN ANY ACTION,  SUIT OR  PROCEEDING  BROUGHT TO
ENFORCE OR DEFEND ANY RIGHTS OR REMEDIES  UNDER THIS  AGREEMENT OR ANY DOCUMENTS
RELATED HERETO.

                                      -8-
<PAGE>

         10.03. Submission to Jurisdiction.  Any legal action or proceeding with
respect to this Agreement or the other Ancillary Documents may be brought in the
courts of the State of California  and the United  States of America  located in
the City of Los  Angeles,  California  and, by  execution  and  delivery of this
Agreement,  the  Purchaser  hereby  accepts  for  itself  and in  respect of its
property,  generally  and  unconditionally,  the  jurisdiction  of the aforesaid
courts.  Each Seller hereby  irrevocably  waives,  in  connection  with any such
action  or  proceeding,  any  objection,   including,  without  limitation,  any
objection to the venue or based on the grounds of forum non  convenes,  which it
may now or hereafter  have to the bringing of any such action or  proceeding  in
such respective  jurisdictions.  Each Seller hereby irrevocably  consents to the
service  of process of any of the  aforementioned  courts in any such  action or
proceeding by the mailing of copies  thereof by  registered  or certified  mail,
postage prepaid, to it at its address as set forth herein.

         10.04.  Headings.  Article and Section  headings used in this Agreement
are for  convenience  only and shall not affect the meaning or  construction  of
this Agreement.

         10.05. Notices. All notices and other communications hereunder shall be
in  writing  and  shall be deemed  given if  delivered  personally  or mailed by
certified  mail  (return  receipt  requested)  to the  parties at the  following
address  (or at such other  address  for a party as shall be  specified  by like
notice),  or if  sent by  telecopy  to the  parties  at the  following  telecopy
numbers;

         10.06.  Parties  in  Interest.  All the  terms and  provisions  of this
Agreement  shall be binding upon and inure to the benefit of and be  enforceable
by the successors of Sellers and Purchaser.

         10.07. Final Agreement; Entire Agreement. This Agreement, including any
agreements set forth as an annex to any this  Agreement,  is the final agreement
between the parties and  constitutes  the entire  agreement  between the parties
hereto and supersedes all prior agreements and understandings,  both written and
oral, whether signed or unsigned, with respect to the subject matter hereof.

         10.08.  Counterparts.  This  Agreement  may be  executed in two or more
counterparts,  each of which shall be considered  an original,  but all of which
together shall constitute the same instrument.

         10.09.  Amendment.  This Agreement may be amended only by an instrument
in writing signed by or on behalf of each of the parties hereto.

         10.10. Preparation of Agreement.  Purchaser prepared this Agreement and
the  Ancillary  Agreements  solely on its behalf.  Each party to this  Agreement
acknowledges that: (i) the party had the advice of, or sufficient opportunity to
obtain the advice of, legal counsel  separate and  independent  of legal counsel
for any other party hereto;  (ii) the terms of the transactions  contemplated by

                                      -9-
<PAGE>

this Agreement are fair and  reasonable to such party;  and (iii) such party has
voluntarily entered into the transactions contemplated by this Agreement without
duress or coercion.

         IN WITNESS WHEREOF,  the parties have duly executed this Stock Purchase
Agreement as of the date first written above.

NATIONAL HEALTH CARE TECHNOLOGY, INC., Colorado Corporation
SOON TO BE KNOWN AS BRIGHTON OIL, INC., a Nevada Corporation

By: /s/ Samvel Petrossian
    ----------------------------------
Name:  Samvel Petrossian
Title: CEO

CASTLE OIL AND GAS, LLC

By: /s/ Chris Sayre
    ----------------------------------
Name:  Chris Sayre
Title:  Member

By: /s/ Steven W. Hickey
    ----------------------------------
Name:  Steven W. Hickey
Title:  Member

By: /s/ Dana Veitch
    ----------------------------------
Name:  Dana Veitch
Title:  Member

                                      -10-

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