the Shared Location by the specified Party and (iv) shall be removed from Schedule 4.1, provided, however, that the foregoing shall not limit a Party's existing use of any Shared Library Material or obligate any Party to cease utilizing any derivative works of such 12 Shared Library Material made prior to the date of agreement regarding the Notifying Party's proposal. In the event that the Parties do not agree that the Notifying Party's proposal is valid, the applicable item shall remain Shared Library Material under the terms of this Agreement. Without limiting the foregoing, the Parties agree and acknowledge that the Shared Library Materials may contain design standards and design manuals related solely to nuclear content set forth on Schedule 4.4 (collectively, the "Nuclear Design Manuals"), and that such Nuclear Design Manuals are deemed to be owned by RemainCo, subject only to SpinCo's right to confirm that such Nuclear Design Manuals, including each page therein, are marked with the engineering standards series and numbering set forth on Schedule 4.4. SpinCo's right to such confirmation is expressly limited to confirmation of the engineering standards series and numbering system contained in or on such Nuclear Design Materials for purposes of confirmation of the document's identification and does not include the right to analyze, review, or approve any of the content contained in any such Nuclear Design Manual. Section 4.5 Confidentiality and Trade Secret Status of Shared Library Materials. The Parties acknowledge that the Research Documents contained within the Shared Library Materials likely contain proprietary trade secret information. Each Party will use reasonable efforts to maintain confidentiality of any trade secret or proprietary information contained within the Shared Library Materials in a manner materially consistent with the how the applicable Party protects its own trade secret or proprietary information. Section 4.6 Third Party