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 other Party will provide such Party with access to the microfiche in its possession for copying, with all copying costs to be paid by the Party seeking to obtain the copy. (b) RemainCo and SpinCo agree to share all costs and expenses of maintaining the Shared Library Materials on an equal basis and to share all costs and expenses of maintaining the Shared Location as set forth in Schedule 6.3 of the Master Separation Agreement. In the event that one Party is responsible vis-a-vis a Third Party for the payment of costs and expenses related to the Shared Location, such Party will provide to the other Party a statement of all costs and expenses incurred in connection with the Shared Location as set forth in Schedule 6.3 of the Master Separation Agreement. The other Party will reimburse the responsible Party for the applicable percentage of such costs and expenses within thirty (30) days of receipt of such statement, unless otherwise agreed upon by the Parties. (c) Without limiting this Section 4.3, the Parties agree that as of the Distribution Time, the Shared Location will be the Iron Mountain storage facility located at Boyers, Pennsylvania, which will be maintained pursuant to an agreement between RemainCo and Iron Mountain for the 137RC account and by SpinCo for the 1100 account. RemainCo and SpinCo shall share all costs and expenses related to storing the Shared Library Materials with Iron Mountain in a manner consistent with Section 4.3(b) above. Section 4.4 Potential Allocation of