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 Parties shall share and discuss the results and data generated from any risk management plan required by MHLW. The Distributor shall collaborate with Zogenix to ensure global alignment and consistency with the safety specifications, pharmacovigilance planning and risk management commitments and activities. (d) Transfer of Marketing Authorization. Zogenix shall be the marketing authorization holder of the Product in the Territory for the [***] following Regulatory Approval of the Product in the Territory. Thereafter, Zogenix shall transfer the marketing authorization for the Product in the Territory to Distributor within [***] following [***], unless delayed or prohibited by a Regulatory Authority or Applicable Law or otherwise agreed by the Parties. Upon the transfer of the marketing authorization of the Product in the Territory to Distributor, then Distributor shall be deemed the MAH Party for purposes of this Agreement and Zogenix shall be deemed the Non-MAH Party. (e) Ownership of Regulatory Information. The Parties acknowledge and agree that Zogenix shall retain the full unfettered ownership of the Data and drug dossier 16 US-DOCS\105216871.19 Source: ZOGENIX, INC., 10-Q, 5/9/2019 submitted to the PMDA for the Regulatory Approval (including but not limited to safety & efficacy data, clinical data package, drug formulation and method of administration). Notwithstanding the foregoing, if Zogenix asks Distributor to solely conduct any additional Territory-specific Development activities which are urgently required by the MHLW for the MAA in the Territory, Distributor shall retain co-ownership with Zogenix of any Data generated solely by Distributor. Distributor hereby grants Zogenix an irrevocable, perpetual, royalty-free, fully paid-up, exclusive license with the right to grant sublicenses to use such Data solely generated and co-owned by Distributor outside of the Territory and a co-exclusive license in the Territory upon expiration or termination of the Agreement. (f) Regulatory Cooperation. Each Party shall cooperate in good faith with any reasonable requests for assistance from the other Party with respect to obtaining or maintaining Regulatory Approval of the Product in and outside the Territory, including by providing to the other Party all Information in its possession and Control that is requested by, or needed to respond to inquiries of, a Regulatory Authority with respect to the Product. 4.3 Distributor's Right to Use and Reference. Distributor shall have the right to reference and use all Data and Regulatory Filings (including all Regulatory Approvals) for the purpose of fulfilling Distributor's obligations set forth in this Agreement. For clarity, in accordance with Section 4.2(b), [***]. 4.4 Zogenix's Right to Use and Reference. In the event that Distributor is responsible for filing for and obtaining Regulatory Approval of the Product in the Field in the Territory or Distributor otherwise is the holder of the Regulatory Approval for the Product in the Territory, Zogenix and its Affiliates and Zogenix ex-Territory Distributors shall have the royalty-free right to reference and use all Data and Regulatory Filings (including all Regulatory Approvals), including all data contained or referenced therein, provided by or to Distributor under this Article 4, such reference and use in connection with filing for, obtaining and maintaining Regulatory Approval and commercializing the Product outside the Territory and in the Territory outside the Field. Distributor shall, on written request by Zogenix, provide, or shall cause its applicable Affiliate to provide, to Zogenix and to any specified Regulatory Authority a letter, in the form reasonably required by Zogenix, acknowledging and confirming that Zogenix and its Affiliates and/or Zogenix ex-Territory Distributors, as applicable, have the rights of reference to any such Regulatory Filing (including any such Regulatory Approval) for all purposes consistent with the Development, Regulatory Approval and commercialization of the Product outside the Territory and in the Territory outside the Field. Distributor shall not, and shall cause its Affiliates not to, transfer or disclose any Regulatory Filings (including any Regulatory Approval) relating to the Product in the Territory to any Third Party without the prior written consent of Zogenix, and in any such permitted transfer Distributor shall require the transferee to acknowledge in writing to Zogenix, Zogenix's (and its Affiliates' and Zogenix ex-Territory Distributors') rights of reference to and right to use all such Regulatory Filings (including Regulatory Approvals) as provided in this Section 4.3. 4.5 Adverse Event Reporting. The MAH Party shall be responsible for the timely 17 US-DOCS\105216871.19 Source: ZOGENIX, INC., 10-Q, 5/9/2019 reporting of all relevant adverse drug reactions/experiences, Product quality, Product complaints and safety data relating to the Product in the Field to the appropriate Regulatory Authorities in the Territory, all in accordance with Applicable Laws and requirements of Regulatory Authorities in
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Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.

assistant: Distributor hereby grants Zogenix an irrevocable, perpetual, royalty-free, fully paid-up, exclusive license with the right to grant sublicenses to use such Data solely generated and co-owned by Distributor outside of the Territory and a co-exclusive license in the Territory upon expiration or termination of the Agreement.