Exhibit 99.1 Summary of Indicative Terms and Conditions Underwriting and Reinsurance Arrangement Chubb Re Trenwick America Reinsurance Corporation Underwriting Agreement - ---------------------- Parties Chubb Re, Inc. ("Chubb Re") and Trenwick America Reinsurance Corporation ("Underwriting Manager"). Term Commences on November 1, 2002 and expires on December 31, 2003. Both parties can cancel the Underwriting Agreement at any time. Services Provided Subject to Chubb Re's approval, Underwriting Manager shall cause all of its U.S. reinsurance business both new and renewing during the Term of the Underwriting Agreement to be underwritten on behalf of Chubb Re. Chubb Re's approval will not be unreasonably withheld. Any such reinsurance business declined by Chubb Re may be underwritten by the Underwriting Manager with the Underwriting Manager as the Reinsurer. Underwriting authority may be cancelled by Chubb Re for any change in Underwriting Manager's key management. Underwriting Manager will not underwrite on behalf of any third party during the term of the Underwriting Agreement without the prior written approval of Chubb Re. Chubb Re shall have no obligations or liability regarding business underwritten by Underwriting Manager on behalf of a third party or where Underwriting Manager is the reinsurer. Maximum Amount of Underwriting Manager will be permitted Premiums to underwrite business on behalf of Chubb Re during the Term of the Underwriting Agreement having gross written premiums (based upon original estimates provided by ceding companies) of up to $ 400 million. Expense Reimbursement Underwriting Manager shall be entitled to receive a monthly expense reimbursement equal to 2.0% of the gross written premiums underwritten on behalf of Chubb Re pursuant to the Underwriting Agreement collected during the applicable month. The payment of 66-2/3% of the Expense Reimbursement shall be made by Chubb Re as if paid from the Experience Account and the payment of the remaining 33-1/3% of the Expense Reimbursement shall be made directly by Chubb Re to the Underwriting Manager. The total Expense Reimbursement payable to Underwriting Manager shall be subject to a cap of $6.5 million. The minimum total Expense Reimbursement shall be $5.5 million. Notwithstanding the foregoing, should either party choose to cancel the Underwriting Agreement before December 31, 2003, the minimum Expense Reimbursement shall be prorated based upon the proportion of time the Underwriting Agreement was in effect. Fronting Fee For purposes of calculating the Experience Account, the Fronting Fee will be the greater of 5% of gross written premiums underwritten on behalf of Chubb Re or $15 million. For purposes of calculating the attachment point for the Stop Loss Reinsurance Agreement and the Override, the Fronting Fee will be 5% of gross written premiums underwritten on behalf of Chubb Re. A deposit fee of $5 million will be paid to Chubb Re at signing with additional payments of $5 million on 1/1/03 and $1.257 million on 3/31/03, 6/30/03, 9/30/03 and 12/31/03. The actual Fronting Fee retained by Chubb Re will be the greater of million or 5% on 66-2/3% of the gross written premiums underwritten on behalf of Chubb Re pursuant to the Underwriting Agreement In the event that the Underwriting Agreement is terminated by Underwriting Manager or Chubb Re before January 1, 2003, the Fronting Fee shall be the greater of (a) 5% of the gross written premiums underwritten on behalf of Chubb Re or (b) $5 million. In the event that the Underwriting Agreement is terminated by Underwriting Manager or Chubb Re between January 1, 2003 and December 31, 2003, the Fronting Fee shall be the greater of (a) 5% of the gross written premiums underwritten on behalf of Chubb Re or (b) $15 million. Experience Account A notional Experience Account shall be established equal to the following: Premiums collected (net of ceding commission, reinsurance brokerage) plus Investment credit on Experience Account balances plus Recoverable reinsurance payments (including payments under the Stop Loss Reinsurance Agreement) minus Paid losses and L.A.E minus Expense Reimbursement minus Fronting Fee minus Reinsurance premiums paid (net of ceding commission) For purposes of calculating the Experience Account, ceding commission includes profit commission and sliding scale payments to ceding companies. The Experience Account will earn an investment credit at a rate equal to the three year U.S. Treasury Bill as of the close of business on the first business day of the applicable time period. The investment credit will be calculated each March 31, June 30, September 30 and December 31 and shall be based upon the average daily balance in the Experience Account during the applicable three month period. Profit Commission 66-2/3% of the Experience Account;However, for purposes of calculating the Profit Commission, Experience Account shall include the following after "minus Reinsurance Premiums paid (net of ceding commission)"above: "minus Unpaid Losses and L.A.E. (case, IBNR and additional case reserves). Page 2 Profit Commission Payment March 31, 2006 25% of cumulative indicated Profit Schedule Commission September 30, 2006 50% of cumulative indicated Profit Commission, less prior Profit Commission paid March 31, 2007 75% of cumulative indicated Profit Commission, less prior Profit Commission paid September 30, 2007 100% of cumulative indicated Profit Commission, less prior Profit Commission paid Profit Commission shall be adjusted semi-annually thereafter, taking into account prior Profit Commission payments, until expiration of underlying liabilities or mutual agreement. Premium Processing Chubb Re shall process all premiums received in connection with the Underwriting Agreement. All premiums received shall be in the name of Chubb Re, on behalf of Federal Insurance Company and shall not be at any time deposited into any account of Underwriting Manager, any affiliate thereof or any third party. Claim Processing Chubb Re and Underwriting Manager shall jointly adjust and settle any claim arising under the business underwritten pursuant to the Underwriting Agreement; provided that Chubb Re shall have final authority with respect to each such claim or settlement. Stop Loss Reinsurance Agreement - ------------------------------- Parties Federal Insurance Company ("Chubb Re") and Trenwick America Reinsurance Corporation ("Reinsurer"). Term Covers treaties incepting between November 1, 2002 and December 31, 2003. Coverage 100% quota share of the paid losses,L.A.E. and unpaid losses (case and IBNR including additional case reserves) on all business underwritten on behalf of Chubb Re pursuant to the Underwriting Agreement in excess of the following net amount related to such business: Attachment point Premiums collected (net of ceding commission and reinsurance brokerage) plus Recoverable reinsurance payments (including payments under the Stop Loss Reinsurance Agreement) minus Expense Reimbursement minus Reinsurance premiums paid (net of ceding commission) minus Profit Commission paid to Underwriting Manager minus Fronting Fee For purposes of determining the reinsurance agreement attachment point, ceding commission includes profit commission and sliding scale payments to ceding companies. Page 3 Override Chubb Re will pay to Reinsurer a 30% override on 33-1/3% of the amount by which (a) 90% of premiums collected less the ceding commission, reinsurance brokerage and Fronting Fee, plus investment income on Experience Account balances plus recoverable reinsurance payments (including payments under the Stop Loss Reinsurance Agreement) exceed (b) the sum of paid losses plus unpaid losses (case and IBNR) plus Expense Reimbursement plus reinsurance premiums paid (net of ceding commission). For purposes of calculating the Override, ceding commission includes profit commission and sliding scale payments to ceding companies. Override shall be first paid on September 30, 2007 and adjusted semi-annually thereafter, taking into account prior Profit Commission payments, until expiration of underlying liabilities or mutual agreement. Collateral As a condition precedent to entering into the Stop Loss Reinsurance Agreement, Reinsurer shall make a security deposit of $50 million (the "Security Deposit") at signing securing the payment for reserves in respect of unearned premium, known outstanding losses (including additional case reserves) and expenses that have been reported to Reinsurer, losses and expenses paid by Chubb Re but not recovered from Reinsurer, return profit commission, plus reserves for losses and expenses incurred but not reported and any other amounts due to Chubb Re under the Stop Loss Reinsurance Agreement or the Underwriting Agreement ("Reinsurer's Obligations"). If Reinsurer fails to provide such Security Deposit upon signing the Stop Loss Reinsurance Agreement, then the Stop Loss Reinsurance Agreement and the Underwriting Agreement shall be void ab initio. Additionally, Reinsurer will pay additional amounts to Chubb Re for the Security Deposit, so that the Security Deposit is equal to the greater of $50,000,000 or the amount of the Reinsurer's Obligations, subject to the reductions below. Notwithstanding anything to the contrary, given the long term nature of the Stop Loss Reinsurance Agreement, the amount of the cash deposit may be greater than the Reinsurer's obligations under the Stop Loss Reinsurance Agreement. Page 4 Collateral (Continued) The Security Deposit will earn an investment credit at a rate equal to the three year U.S. Treasury Bill as of the close of business on the first business day of the applicable time period. The investment credit will be calculated each March 31, June 30, September 30 and December 31 and shall be based upon the average daily balance of the Security Deposit during the applicable three month period. Any amount of the Security Deposit (plus the amount of accrued investment credits on the Security Deposit) in excess of the amount required under the following schedule shall be returned to Reinsurer provided that the Reinsurer has an A.M. Best rating of A- or better: March 31, 2006 The greater of (a) $40 million or (b) the amount equal to the Reinsurer's Obligations September 30, 2006 The greater of (a) $30 million or (b) the amount equal to the Reinsurer's Obligations March 31, 2007 The greater of (a) $20 million or (b) the amount equal to the Reinsurer's Obligations September 30, 2007 The greater of (a) $10 million or (b) the amount equal to the Reinsurer's Obligations January 1, 2008 The amount equal to the Reinsurer's and thereafter Obligations If Reinsurer reacquires an A- rating from A.M. Best and its rating subsequently falls below A-, then no further reductions will be allowed as of the date of the downgrade. At quarterly intervals, Chubb Re shall prepare a specific statement showing Reinsurer's Obligations, for the sole purpose of amending the amount of the Security Deposit. If the statement shows Reinsurer's Obligations exceed the amount of the required Security Deposit as of the statement date, Reinsurer shall within 5 days after receipt of the notice of such excess pay to Chubb Re the amount of such excess so that the total amount of the Security Deposit equals the statement amount. On January 1, 2012, regardless of whether Reinsurer has reacquired an A- rating from A.M. Best, that portion of the Security Deposit which exceeds positive difference (if any) of (a) the Reinsurer's Obligations minus (b) the amount in the Experience Account, will be returned to Reinsurer. Page 5 General Terms - ------------- Determination of IBNR To be determined by Chubb Re, provided that applicable IBNR shall be the same as IBNR utilized by Chubb Re for financial and statutory reporting purposes. Underwriting Manager/Reinsurer shall have the right to audit at its own expense any determination of IBNR made by Chubb Re. Underwriting Manager/Reinsurer shall not have the right to dispute Chubb Re's calculation of IBNR until after December 31, 2006. Any dispute as to IBNR which cannot be settled between Underwriting Manager/Reinsurer and Chubb Re shall be submitted to a qualified independent actuary selected jointly by the Chubb Re and Underwriting Manager/Reinsurer. If the parties cannot agree to an actuary, each party shall nominate three persons. Each party will then decline two of the nominees, and the actuary will be chosen from the remaining nominees by the drawing of lots. Reporting Underwriting Manager/Reinsurer and Chubb Re shall each use their best efforts to cooperate in the exchange of information necessary for each party's financial reporting and regulatory compliance. Business Protection Chubb Re agrees that for one year after the date of termination of the Underwriting Agreement, it will not underwrite any reinsurance treaty which is underwritten on its behalf by Underwriting Manager, unless Chubb Re independently underwrote such reinsurance treaty at the time it was underwritten on its behalf by Underwriting Manager. Event of Default The following events shall constitute Events of Default for purposes of the Underwriting Agreement and the Stop Loss Reinsurance Agreement: o Creditors attach or take possession of any material amount of Underwriting Manager/Reinsurer's assets; or o Underwriting Manager/Reinsurer voluntarily or involuntarily enters into rehabilitation, dissolution, winding-up, liquidation, administration or reorganization proceedings under applicable bankruptcy, insolvency or similar law; provided, that, the entry by the Underwriting Manager/ Reinsurer into a letter of understanding or a mutual consent order with the Connecticut Department of Insurance as a result of the Underwriting Agreement or the Stop Loss Reinsurance Agreement in and of itself shall not constitute an Event of Default; provided, that nothing in the letter or order contradicts the aforementioned Events of Default under this Event of Default section. Upon the occurrence of an Event of Default, there will be no Profit Commission paid or reduction in the amount of Collateral until the earlier of (a) the cessation of the Event of Default or (b) January 1, 2012, at which time the Profit Commission payment schedule and Collateral reduction schedule shall recommence at the point at which the Event of Default occurred. Governing Law: New York Dispute Resolution Arbitration in New York, New York Page 6 Other Disclosure/announcement of agreement and/or the use of Chubb's name in any marketing or advertising material to be pre-approved by Chubb Re and the Underwriting Manager/Reinsurer. Loss Payments - Due from Reinsurer to Chubb Re within 5 days of Reinsurer receiving a payment request from Chubb Re. Agreed and Accepted: Dated: October 25, 2002 CHUBB RE, INC. ON BEHALF OF ITSELF AND FEDERAL INSURANCE COMPANY By: /s/ John Berger --------------------------------- Name: John Berger Title: Pres. & CEO TRENWICK AMERICA REINSURANCE CORPORATION By: /s/ Stephen Binet --------------------------------- Name: Stephen Binet Title: President & CEO Page 7