system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
"""
NICE' procedures or policies, shall bind Contractor after it is notified of same, unless the change is material, in which case Contractor can object to the change on reasonable grounds detailed in writing. 17.2. AMENDMENT. This Agreement may only be amended, varied or modified by the prior agreement in writing of NICE and Contractor. Any such amendment, variation or modification shall be binding upon the parties and upon their successors and assigns. Work procedures and technical documents may be signed by any representative on behalf of each of the parties and need not be signed by authorized signatories of the parties. 17.3. ASSIGNMENT. This Agreement shall be binding upon and inure to the benefit of the parties and their respective successors and permitted assigns. Neither party shall in any way sell, transfer, assign, sub-contract or otherwise dispose of any of the rights, privileges, duties and obligations granted or imposed upon it under this Agreement. However, NICE may, at its discretion, transfer and/or assign any of its rights, privileges, duties and obligations granted or imposed upon it under this Agreement to any NICE Affiliate, provided that NICE remains responsible towards Contractor, jointly and severally with the Affiliate, for all of its obligations hereunder so assigned, and provided further that the assignee signs this Agreement. 41 It is further clarified that NICE may choose, by written notice to Contractor, to enable any NICE Affiliate to act on NICE' behalf and in its name under this Agreement directly VIS-A-VIS Contractor, without relieving NICE as the sole contractual party from responsibility for performance of the Agreement. Notwithstanding the foregoing, Upon NICE' prior written approval and upon the terms and limitations of such approval, Contractor may sub-contract some of its obligations ("PERMITTED SUBCONTRACTORS"), provided, however, that Contractor shall remain obligated under this Agreement. Contractor shall provide to NICE material qualifications and identification details of such Permitted Subcontractors. Contractor shall at all times remain fully responsible for the performance of all obligations of Contractor hereunder, jointly and severally with the Permitted Subcontractors. In selecting subcontractors to assist Contractor in the performance of this Agreement, Contractor shall comply with all reasonable NICE vendor screening requirements which are provided to it, and Contractor shall also comply with its own vendor screening requirements. 17.4. SEVERABILITY. If any provision of this Agreement is held invalid, illegal or unenforceable for any reason by any court of competent jurisdiction, such provision shall be separable from the remainder of the provisions hereof which shall continue in full force and effect as if this Agreement had been executed with the invalid provisions eliminated. 17.5. FORCE MAJEURE. 17.5.1. Neither party shall be liable to the other for any delay in performance or failure to perform, in whole or in part, due to war or act of war (whether an actual declaration is made or not), riot, civil commotion, act of public enemy, fire, flood, or other act of God, act of any governmental authority, or similar causes beyond the reasonable control of such party which could not have been foreseen or prevented. If any event of force majeure occurs, the Party affected by such event shall promptly notify the other Party of such event in writing and take all reasonable actions to avoid the effect of such event. 17.5.2. Nevertheless, if any event of force majeure occurs for a consecutive period of fourteen (14) Days preventing Contractor from performing the Manufacturing Outsourcing Services, and Contractor has not managed to set up the Manufacturing Outsourcing Services at the Backup Site, NICE may, at its discretion, elect to perform the Manufacturing Outsourcing Services or any part thereof by itself and/or through others, without derogating from its other rights and remedies, if applicable. In such event: (a) Contractor shall assist NICE by putting at its use, at NICE' request, Contractor Personnel who are involved in the performance of this Agreement, to the extent possible, at a charge to be agreed based on the labor rates in APPENDIX C; (b) without derogating from any other obligations of NICE hereunder as at such date to purchase Permitted Components, NICE shall purchase from Contractor the additional Permitted Components in Contractor's inventory, which are required, at NICE' discretion, for manufacturing during the force majeure period. The price and payment terms for purchase of such Permitted Components shall be according to the provisions of Section 3.4(A) above, which shall apply mutatis mutandis. 42 17.5.3. If the event of force majeure exists for more than 90 days, each party shall have the right to
"""

Extract the exact clause related to "Anti-Assignment" from the excerpt above.

assistant: Neither party shall in any way sell, transfer, assign, sub-contract or otherwise dispose of any of the rights, privileges, duties and obligations granted or imposed upon it under this Agreement. However, NICE may, at its discretion, transfer and/or assign any of its rights, privileges, duties and obligations granted or imposed upon it under this Agreement to any NICE Affiliate, provided that NICE remains responsible towards Contractor, jointly and severally with the Affiliate, for all of its obligations hereunder so assigned, and provided further that the assignee signs this Agreement.