ACE Limited Rules of the Approved UK Stock Option Programme Approved by the Inland Revenue on 24 November 1997 (Reference No: X19095/RC) Lovell White Durrant 65 Holborn Viaduct London EC1A 2DY Ref: A4/JCMcM/LLW CONTENTS Clause Page No. 1. Establishment and purpose of the Programme 1 2. Definitions 1 3. Grant of Options 5 4. Limitations on Grant of Options 5 5. Exercise of Options 6 6. Time for Exercise of Options 6 7. Replacement of Options on a takeover or other change in Control of the Company 7 8. Variations in the Share Capital of the Company 8 9. Administration of the Programme 8 10. Amendment of the Programme 8 11. Additional Provisions 8 12. Termination 9 - 1 - ACE Limited Approved UK Stock Incentive Programme (An approved Company share option plan pursuant to the provisions of Schedule 9 to the Income and Corporation Taxes Act 1988) 1. Establishment and Purpose of the Programme 1.1 On 12 November 1997 the Committee adopted, subject to the approval of the Inland Revenue, the Programme as an addendum to the ACE Limited 1995 Long-Term Incentive Plan (the "Plan") to enable Eligible Employees of the Company and its Subsidiaries to participate in the Plan and obtain the benefit of approval by the Board of Inland Revenue pursuant to Schedule 9 to the Income and Corporation Taxes Act 1988 ("Schedule 9"). 1.2 On 24 November 1997 the Inland Revenue gave formal approval to the Programme. The rules of the Programme (the "Programme Rules") comply with the requirements of Schedule 9. 1.3 The rules of the Plan (the "Plan Rules") shall apply to the Programme unless the Programme Rules expressly or by implication provide to the contrary, but so that nothing in either the Plan or the Programme Rules shall operate to prejudice the approval by the Board of Inland Revenue of the Programme PROVIDED ALWAYS THAT in the event of a conflict between the Plan Rules and the Programme Rules whereby the status of the Plan is or will be prejudiced the Plan Rules shall prevail. 1.4 For the avoidance of doubt rule 2.5 of the Plan shall not apply to the Programme and the Company may only grant options pursuant the Programme. Stock Appreciation Rights, Limited Stock Appreciation Rights, Restricted Stock or a Stock Purchase Program may not be granted pursuant the Programme Rules. 1.5 The Committee may designate whether or not an Option is to be considered an incentive stock option as defined in Section 422(b) of the US Internal Code 1986, as amended ("Incentive Stock Option"). 1.6 The Programme shall be governed and construed in accordance with the laws of England. 2. Definitions 2.1 In the Programme the following words and expressions have the meanings set opposite them: "ACE Group" the Company and all of the Subsidiaries and, in relation to a New Option granted pursuant to clause 7 the Acquiring Company and the Controlling Company and their Subsidiaries as defined in Section 736 of the Companies Act 1985, and "member of the ACE Group" shall be construed accordingly; "Act" the Securities Exchange Act 1934, as amended; - 2 - "Acquiring a company which for the purposes of Company" clause 7 comes within the definition of "the acquiring company" in paragraph 15(1) of Schedule 9; "Affiliate" a person or entity that directly or indirectly controls, is controlled by or is under common control with another person or entity; "Any Other any scheme other than the Programme Approved Scheme" established by the Company or by any Associated Company and approved in accordance with Schedule 9 but excluding for the purposes of this definition any savings-related share option scheme or profit sharing scheme so established; "Approval Date" the date on which the Company receives written notification from the Board of Inland Revenue that the Programme has received Revenue Approval; "Associated any company which is an associated Company" company of the Company within the meaning of section 416(1) of the Taxes Act; "Board" the board of directors for the time being of the Company; "Change in Control" shall for the purposes of clause 6.7 mean the occurrence of one of the following events: (i) the acquisition by any Person of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Act) of fifty percent (50%) or more of the Voting Stock; (ii) the majority of the Board consists of individuals other than Incumbent Directors; (iii) the Company adopts any plan of liquidation providing for the distribution of all or substantially all of its assets; - 3 - (iv) all or substantially all the assets or business of the Company is disposed of pursuant to a merger, consolidation or other transaction (unless the shareholders of the Company immediately prior to such merger, consolidation or other transaction beneficially own, directly or indirectly, in substantially the same proportion as they owned Voting Stock of the Company, all of the Voting Stock or other ownership interests of the entity or entities, if any, that succeed to the business of the Company); (v) the Company combines with another company and is the surviving corporation but, immediately after the combination, the shareholders of the Company immediately prior to the combination hold, directly or indirectly, 50% or less of the Voting Stock of the combined company (there being excluded from the number of shares held by such shareholders, but not from the Voting Stock of the combined company, any shares received by Affiliates of such other company in exchange for stock of such other company); "Committee" the Compensation Committee of the Board or such other committee as the Board shall designate to administer the Plan; "Company" ACE Limited, a Corporation incorporated in the Cayman Islands; "Control" for the purposes of clause 7, the control of a company within the meaning given to that expression by section 840 of the Taxes Act; "Controlling a company, other than the Company Company" and an Acquiring Company, which falls within sub-paragraphs 10(b) or 10(c) of Schedule 9; - 4 - "Disability" a Participant shall be considered to have a "Disability" during the period in which he is unable by reason of a medically determinable physical or mental impairment to engage in any substantial gainful activity, which condition, in the opinion of a physician selected by the Committee, is expected to have a duration of not less than 120 days; "Eligible Employee" any person whose terms of employment require him to devote substantially the whole of his time to working for any member or members of the ACE Group, except for; (i) any director of a member or members of the ACE Group who is contracted to work for less than 25 hours a week (excluding meal breaks) in that capacity; and (ii) any person who is prohibited from partici- pating in the Programme by the provisions of paragraph 8 of Schedule 9; "Exercise Price" the price per Share payable on the exercise of an Option as determined by the Committee but in no event less than the greater of: (i) the nominal value of a Share (if the Shares are to be subscribed); and (ii) the Fair Market Value of a Share on the day on which the Option is granted; "Fair Market Value" the value of a Share on any day being: (i) if and for so long as the Company's Shares are admitted to the official list of the New York Stock Exchange, the closing market composite price for Shares as reported on the New York Stock Exchange - Composite Transactions on that date or if the New York Stock Exchange is closed on that date, the last preceding date on which the New York Stock Exchange was open for trading and on which the Shares were traded PROVIDED THAT such date shall not be a date which is more than 30 days before the date of grant of an Option; or - 5 - (ii) in all other cases, the market value determined in accordance with Part VIII of the taxation of Chargeable Gains Act 1992 and if and for so long as the Programme has Revenue Approval agreed in advance with the Shares Valuation Division of the Inland Revenue; "Incumbent Directors" the individuals constituting the Board as of the date the Plan was adopted and any subsequent directors whose election or nomination for election by the Company's stockholders was approved by a vote of three quarters (3/4) of the individuals who are then Incumbent Directors; "Normal Retirement the voluntary termination of Age" employment at a time when the Participant has attained normal retirement age under the ACE Limited Employee Retirement Plan or any other retirement benefits scheme maintained by a company in the ACE Group or such other age as shall be determined by the Committee in its sole discretion; "Option" subject to clause 7, a right to acquire Shares pursuant to the provisions of the Programme; "Option Period" subject to clause 6, the period ending no later than ten years from the date of an Option during which an Option shall be exercisable in accordance with the provisions of the Programme as determined by the Committee at the date of grant of the Option provided that the Option may not be exercisable before the Participant has completed one year's service with the Group; "Participant" an Eligible Employee who has been granted an Option or where applicable, the personal represent- ative(s) of any such person; "Person" person for the purposes of the definition of "Change in Control" has the same meaning as set forth in Sections 3(a)(9) and 13(d) of the Act; "Plan" the ACE Limited 1995 Long-Term Incentive Plan approved by the stockholders of the Company in general meeting on 9 February 1996 and as subsequently amended; - 6 - "Programme" the Programme adopted on 12 November 1997 as from time to time amended in accordance with the provisions hereof; "Related Company" any company which is a subsidiary corporation as defined in Section 424(f) of the Internal Revenue Code of 1986; "Revenue Approval" approval of the Programme by the Board of Inland Revenue under Schedule 9; "Schedule 9" Schedule 9 to the Taxes Act; "Shares" subject to clause 7.3(a), Stock which satisfies the requirements of paragraphs 10 to 14 inclusive of Schedule 9; "Stock" shares of the common stock of the Company; Subsidiaries" those companies over which for the time being the Company has Control and which are subsidiaries of the Company within the meaning of Section 736 of the Companies Act 1985; "Taxes Act" the Income and Corporation Taxes Act 1988; "Voting Stock" capital stock if any class or classes having general voting power under ordinary circumstances in the absence of contingencies to elect the directors of a company. - 7 - 2.2 Any reference herein to a statutory provision shall include a reference to that provision as amended or re-enacted from time to time. Where the context permits the singular shall include the plural and vice versa and the masculine gender shall include the feminine. 3. Grant of Options 3.1 Subject to the limits contained in clause 4, at any time after the Approval Date, the Committee may, in its absolute discretion grant an Option to an Eligible Employee in accordance with the Programme. The Committee shall give notice in writing to the Eligible Employee to specify: (a) the number of Shares in respect of which the Option is granted, (b) the date on which it is granted, (c) the Exercise Price, (d) the objective performance target(s), if any, imposed by the Committee, the terms of which must, at any time when the Programme has Revenue Approval, be approved by the Board of Inland Revenue; and (e) the Option Period. 3.2 The grant of an Option shall be made on the basis that participation in the Programme shall be deemed to constitute an agreement to be bound by the Programme Rules and shall be evidenced by an instrument in such form as the Committee may from time to time prescribe. The instrument shall be issued as soon as practicable after the date of grant. 3.3 An Option shall be personal to the Participant and may not be transferred except as designated by the Participant by will or by the laws of descent, or, subject to the provisions of clause 6.2, exercised by any other person. In no event shall an Incentive Stock Option be transferable to the extent that such transferability would violate the requirements of the Inland Revenue Code 1986 Section 422. Any attempt to so transfer or sell an Option shall cause the Option to lapse forthwith. 4. Limitations on Grant of Options 4.1 No Option shall be granted pursuant to clause 3 if such grant would exceed the limits imposed on the grant of rights under the Plan pursuant to section 6 of the Plan with respect to the number of Shares which may be made the subject of Options and other rights under the Plan. 4.2 No Option shall be granted to an Eligible Employee pursuant to the Programme if as a result the total Option Price of the Shares issuable on the exercise of such Option when aggregated with the total market price at the relevant date of grant of shares still capable of being issued on the exercise of options previously granted to him under the Programme and Any Other Approved Scheme would exceed (pound)30,000 (or its equivalent in any other currency, taking as the rate of exchange the spot rate for the currency in question on the date of grant of the Option as quoted by any of the Company's bankers from time to time). - 8 - 5. Exercise of Options 5.1 Subject to clause 6, an Option shall only be exercised by a Participant within the Option Period by his giving to the Secretary of the Company at its corporate headquarters, written notice, which shall be in such form as may be prescribed by the Committee and shall be signed by the Participant. An Option may be exercised in whole or in part. Such notice shall specify the number of Shares in respect of which the Option is being exercised and shall be accompanied by payment in full of the total Exercise Price for the said Shares and the instrument evidencing the grant of the relevant Option for cancellation or amendment. 5.2 Payment for the Option exercised shall be in cash, or cheque, bank draft or money order to the order of the Company, for an amount in United States dollars equal to the total Exercise Price for the number of Shares in respect of which an Option is exercised. 5.3 The Committee shall transfer the appropriate number of Shares to the Participant at their Exercise Price as soon as possible but in any event not later than one month after the date of exercise of the Option and shall deliver where appropriate to the Participant a definitive share certificate in respect thereof. Any Shares issued pursuant to this clause 5.3 shall rank pari passu in all respects and form a uniform class with Shares already in issue. While an Option is unexercised, a Participant shall have no voting rights or any other rights of stockholders with respect to the Shares which are subject to his Option. Furthermore, no cash dividends shall accrue or be payable with respect to any such Shares. Shares subject to unexercised Options shall have no subscription rights. 6. Time for Exercise of Options 6.1 Subject to clauses 6.2 to 6.4 inclusive, an Option may only be exercised during its Option Period. An Option which is not so exercised shall lapse PROVIDED THAT, at the time of exercise of his Option a Participant is not prohibited from doing so by the provisions of paragraph 8 of Schedule 9. 6.2 If a Participant dies his Option may be exercised in full by his personal representative(s) at any time before the expiry of its Option Period and within but not later than 12 months of his death. Any such Option which is not so exercised shall lapse. 6.3 If a Participant ceases to be employed by the Company or a Related Company by reason of Disability, he may exercise his Option in full at any time before the expiry of its Option Period and within 12 months after the date of cessation of his employment. Any such Option which is not so exercised shall lapse. 6.4 If a Participant ceases to be employed by the Company or a Related Company by reason of retirement on or after Normal Retirement Age or earlier retirement with consent of his employer, he may exercise his option to the extent exercisable by him at the time of such cessation at any time before the expiry of its Option Period or his death if earlier. 6.5 If a Participant ceases to be employed by the Company or a Related Company otherwise than by reason of the events specified in clauses 6.2 to 6.4, he may exercise his option to the extent exercisable by him at the time of such cessation at any time before the expiry of its Option Period and within three months after the date of cessation of his employment. Any such Option which is not so exercised shall lapse. 6.6 For the purposes of this paragraph where a Participant's employment is terminated without notice or on terms in lieu of notice it shall be deemed to cease on the date on which the termination takes effect and where the said employment is terminated with notice it shall cease on the date when the notice period expires. - 9 - 6.7 If a Change in Control of the Company shall occur a Participant may exercise his Option in full at any time before the expiry of its Option Period PROVIDED THAT this clause 6.7 shall not apply where a Participant by agreement with an Acquiring Company, releases his Option in consideration of the grant to him of a New Option pursuant to clause 7 before the expiry of the appropriate period referred to in clause 7.4. 7. Replacement of Options on a takeover or other change in Control of the Company 7.1 Clause 7.2 below shall apply where an Acquiring Company obtains Control of the Company as a result of making: (a) a general offer to acquire the whole of the issued share capital of the Company (other than that which is already owned by it and/or by any of its subsidiaries) made on a condition such that if it is satisfied the Acquiring Company will have Control of the Company; or (b) a general offer to acquire all the Shares (or such Shares as are not already owned by the Acquiring Company and/or by any of its subsidiaries). 7.2 A Participant may at any time within the appropriate period as defined in clause 7.4, by agreement with the Acquiring Company, release any of his Options (the "Old Option" for the purposes of this clause) in consideration of the grant to him of a new option (the "New Option" for the purposes of this clause) PROVIDED THAT any New Option satisfies the conditions set out in clause 7.3. 7.3 The New Option must: (a) be over shares in the Acquiring Company or a Controlling Company which shares satisfy the conditions specified in paragraphs 10 to 14 inclusive of Schedule 9 (references to the term "Shares" in this Programme shall thereafter be construed accordingly); (b) be a right to acquire such number of shares which on acquisition of the New Option have an aggregate market value (determined in accordance with Part VIII of the Taxation of Chargeable Gains Act 1992) equal to the aggregate market value of the Shares the subject of the Old Option immediately before its release; (c) have an exercise price per share such that the aggregate price payable on complete exercise of the New Option equals the aggregate price which would have been payable on complete exercise of the Old Option at the time of its release. 7.4 The appropriate period referred to in clause 7.2 is the period of six months commencing on the date when the Acquiring Company making the offer has obtained Control of the Company and any condition subject to which the offer is made is satisfied. 7.5 The New Option shall be exercisable in the same manner as the Old Option and in accordance with the provisions of the Programme as it had effect in relation to the Old Option immediately before its release (references to the term "Option" in the Programme thereafter being construed accordingly), and the New Option shall, for all purposes of the Programme other than clause 7.6, be treated as having been granted on the date when the corresponding Old Option was granted. 7.6 With effect from the grant of a New Option hereunder clause 5, this clause 7, and clauses 8, 9 and 11 shall, in relation to the New Option, be construed as if references to the Company were references to the Acquiring Company, or as the case may be, the Controlling Company. - 10 - 8. Variations in the Share Capital of the Company 8.1 If at any time after the date of grant of an Option and before it ceases to be exercisable, there is a variation or reorganisation of Stock or other capital of the Company, including, without limitation, any subdivision or consolidation of shares or stock or other capital readjustment, stock split, payment of stock dividend, combination of shares or recapitalisation or other increase or reduction of the number of shares or stock outstanding, without receiving compensation therefor in money, services or property or otherwise with respect to its common stock, the number of Shares available under the Programme shall be adjusted and the number then subject to Options and the Exercise Price therefor shall be proportionately and appropriately adjusted all as the Committee shall deem appropriate PROVIDED THAT: (a) the aggregate Exercise Price payable on the exercise of an Option previously granted hereunder shall not be increased; (b) the Option Price shall not be reduced below the nominal value of a Share thereby; (c) all such adjustments shall be subject to prior approval by the Board of Inland Revenue. 8.2 All Participants shall be notified in writing of any such adjustments as soon as practicable thereafter and the Committee shall be entitled to call in the instruments evidencing the grant of the Options affected by such adjustments for endorsement or replacement, as may appear appropriate. 9. Administration of the Programme 9.1 The Programme shall be administered by the Committee. 9.2 Subject as herein otherwise expressly provided the Committee's decision on any matter concerning the Programme shall be final and binding. 10. Amendment of the Programme 10.1 Subject to clause 10.2, the Board or the Committee shall at any time be entitled to amend by resolution all or any of the provisions of the Programme provided that no amendment may adversely affect the rights of any participant already acquire by him under the Programme. 10.2 No amendment to the Programme shall be effective unless and until approved by the Board of Inland Revenue and subject to clause 1.3 nothing shall be done to the Programme which would prejudice the obtaining of Revenue Approval or cause it to be withdrawn. 11. Additional Provisions 11.1 Every Option shall be subject to the condition that no Shares shall be issued to a Participant following the exercise of an Option if such issuance would be contrary to any enactment or regulation for the time being in force of the United States or of any other country having jurisdiction in relation thereto. The Company shall not be bound to take any action to obtain the consent of any governmental authority to such issue or to take any action to ensure that any such issuance shall be in accordance with any such enactment or regulation if such action could in the opinion of the Committee be unduly onerous. 11.2 Every Option shall be subject to the requirement that if at any time the Board shall determine, in its discretion, that the listing, registration or qualification of the Shares subject to an Option upon any securities exchange or under any state or federal law, or that the consent or approval - 11 - of any governmental authority, is necessary or desirable as a condition of, or in connection with, the issuance or purchase of shares under an Option such Option may not be exercised in whole or in part, unless such listing, registration, qualification, consent or approval shall have been effected or obtained free of any conditions not acceptable to the Board. Any Option may be exercised only in accordance with the provisions of all applicable law. 11.3 The rights and obligations of a Participant under his terms of employment with any member of the ACE Group shall not be affected by his participation in the Programme and the Programme shall not afford to a Participant any right to continued employment or any additional right to compensation in consequence of the termination of his employment for any reason whatsoever. 12. Termination the Committee may at any time resolve to cease making further grants of Options under the Programme but in such event the subsisting rights of Participants shall not thereby be affected.