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:
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the disclosing party as those set forth herein. If a receiving party is required by a final authorized order from a recognized and applicable government body or from a court with competent jurisdiction to make any disclosure that is prohibited or otherwise constrained by this Agreement, the receiving party will provide the disclosing party with prompt written notice of such requirement so that the disclosing party may seek a protective order or other appropriate relief. Subject to the foregoing sentence, such receiving party may furnish that portion (and only that portion) of the Confidential Information that the receiving party is legally compelled or is otherwise legally required to disclose; provided, however, that the receiving party provides such assistance as the disclosing party may reasonably request in obtaining such order or other relief. Neither party shall reverse engineer, disassemble or decompile any prototypes, software or other tangible objects that embody the other party's Confidential Information and that are provided to the party under this Agreement. 12.4. Maintenance of Confidentiality. Each party agrees that it shall take reasonable measures to protect the secrecy of and avoid disclosure and unauthorized use of the Confidential Information of the other party. Without limiting the foregoing, each party shall take at least those measures that it takes to protect its own confidential information of a similar nature, but in no case less than reasonable care (including, without limitation, all precautions the receiving party employs with respect to its own confidential materials). No party shall make any copies of the other party's Confidential Information except upon the other party's prior written approval. Each party shall reproduce the other party's proprietary rights notices on any such authorized copies, in the same manner in which such notices were set forth in or on the original or otherwise that can clearly express the other party's proprietary rights. A party receiving Confidential Information shall promptly notify the party disclosing such Confidential Information of any use or disclosure of such Confidential Information in violation of this Agreement of which the receiving party becomes aware. Confidentiality shall be maintained for a period of [*] after expiration of this Agreement. Page 21 of 38 *Confidential Treatment Requested 12.5. IAC's Manufacturing Lines Building Sonos Products. With the exception of authorized contractors approved by the Parties required to perform equipment maintenance or other required work on IAC's manufacturing lines that are assembling and testing Sonos Products, no third party personnel will be allowed access to (including a walk-through or tour) IAC's lines that are manufacturing Products. Any exceptions to this must be approved in advance and in writing between a Sonos Program Manager and IAC Program Manager listed in Exhibit B. 13.0 USE OF CONTRACTORS; COMPLIANCE WITH LABOR LAWS. 13.1. IAC may retain IAC Subcontractors to furnish services to it in connection with the performance of its obligations hereunder and, if required, permit such IAC Subcontractors to have access to Sonos' Confidential Information, provided that such IAC Subcontractors have signed agreements with IAC with restrictions on the use and dissemination of such information at least as restrictive as the confidentiality provisions contained herein. Before engaging any IAC Subcontractor, IAC shall first notify and get written approval from Sonos for the use of such IAC Subcontractor. Sonos shall not unreasonably delay or withhold such approval. IAC represents and warrants that the quality of the services and/or work product of any IAC Subcontractor shall be of at least the same quality as the services and/or work product delivered by IAC hereunder. In addition, IAC shall secure any and all Intellectual Property Rights that may pertain to the Sonos Products that are created by such IAC Subcontractor, and hereby transfers and assigns all such Intellectual Property Rights. IAC agrees that it will not prohibit Sonos from purchasing Components or Sonos Tools directly from any IAC Subcontractor, using existing terms or on terms established between Sonos and such IAC Subcontractor. 13.2. No Product will be (i) produced, manufactured, assembled, tested, or packaged by forced, prison, or child (defined as age 14 or below or the minimum working age within the applicable jurisdiction, whichever is older) labor, or (ii) transshipped for the purpose of mislabeling, evading quota or country of origin restrictions, or avoiding compliance with labor laws. 13.3. IAC and all persons furnished by IAC shall comply at their own expense with all applicable Environmental, Occupational Health and Safety laws, ordinances, regulations and codes, including the identification and procurement of required permits, certificates, licenses, insurance, approvals and inspections in performance
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Extract the exact clause related to "Anti-Assignment" from the excerpt above.

assistant: Before engaging any IAC Subcontractor, IAC shall first notify and get written approval from Sonos for the use of such IAC Subcontractor.