to, agree to such modifications to the extent (i) required for the transaction to be effected and (ii) not materially detrimental to the interests of the Equifax Group. Such modifications shall not be effective until the Divested Business or the acquiror thereof, as required by Equifax, has entered into a license agreement with the appropriate member of the Equifax Group incorporating the terms of Section 4.1 and Section 4.2 and such other terms as Equifax reasonably deems appropriate for the protection of its interests in the Licensed Equifax Materials. (e) Without limiting the foregoing, Equifax hereby grants, and will cause the other members of the Equifax Group to grant, to Certegy a fully paid, non- exclusive, perpetual, worldwide, transferable license to use, modify, improve, create Derivative Works from, and sublicense, the Utility Software Programs (in both object and source code format) identified on Exhibit L as being owned by Equifax or a member of the Equifax Group for any and all fields of use and to any and all Persons. (f) The Licensed Equifax Materials may be marketed under such name and in such manner as Certegy chooses, consistent with the terms and conditions of this Agreement. (g) Except for the Certegy Group's rights described in Section 4.1(a), (b) and (e) above, the Equifax Group's rights in and to the Licensed Equifax Materials shall be and remain the exclusive property of Equifax or the members of the Equifax Group, and their respective successors and assigns. 13 Section 4.2. Ownership of Enhancements by Certegy. (a) Unless Exhibit J provides otherwise, Certegy, or the respective Designated Certegy Member, shall own all the modifications and improvements to, and the Certegy Enhancements and/or Derivative Works made from, the Licensed Equifax Materials developed by any member of the Certegy Group, or by any party other