use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in the RemainCo Core Field and (y) a perpetual (subject to Section 4.4), irrevocable, non- exclusive, royalty-free, worldwide right and license with the right to grant sublicenses (solely as set forth in Section 5.6) to use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in any field other than the SpinCo Core Field or the RemainCo Core Field. The foregoing licenses include the right to reproduce, prepare derivative works, distribute, perform and otherwise exploit such Shared Library Materials and to use the Shared Library Materials to design, develop, manufacture, have manufactured, sell and support products and services, subject in each case to applicable export control Laws and the provisions of Section 4.5. Section 4.3 Maintenance of Shared Library Materials. Unless mutually agreed upon by the Parties in writing, all Shared Library Materials (other than those which have been allocated pursuant to Section 4.4) shall be maintained in a mutually agreed upon location accessible to both Parties (the "Shared Location") and in a manner mutually agreeable to both Parties with respect to shared access, removal and replacement of documents and similar issues. 11 (a) Notwithstanding the foregoing, the Parties acknowledge and agree that (i) archival copies of certain Shared Library Materials are recorded on microfiche; (ii) two sets of the applicable microfiche exist as of the Distribution Time; and (iii) rather than maintaining such microfiche in a mutually agreed upon location accessible to both Parties, each Party will be entitled to maintain a copy of the microfiche at its own location, provided, however, that in the event that any Shared Library Materials are found to be missing from or otherwise inaccessible using one Party's copy of the applicable microfiche, the