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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Food, Drug, and Cosmetic Act, as amended. "FDA" means the U.S. Food and Drug Administration or any successor entity. "Field" means [***]. "Final Audit Report" has the meaning set forth in Section 6.5. "Final Report" has the meaning set forth in Section 6.2(b). "First Commercial Sale" means the date of the first sale of the Product in the Field in a country in the Territory to a Third Party for monetary value and for end use, including stockpiling, administration, or other consumption of the Product in the Field in such country in the Territory. "GCP" means the then-current standards, practices and procedures promulgated or endorsed by the FDA as set forth in the guidelines entitled "Guidance for Industry E6 Good Clinical Practice: Consolidated Guidance," including related regulatory requirements imposed by the FDA and, as applicable, comparable regulatory standards, practices and procedures promulgated by the EMA or other Regulatory Authority, as such standards, practices and procedures may be updated from time to time, including applicable quality guidelines promulgated under the ICH Q7. "Global Trade Control Laws" means the U.S. Export Administration Regulations, the U.S. International Traffic in Arms Regulations; the U.S. economic sanctions rules and regulations implemented under statutory authority and/or the President's Executive Orders and administered by the U.S. Department of the Treasury Office of Foreign Assets Control; EU Council Regulations on export controls, including No.428/2009; other EU Council sanctions laws and regulations, as implemented in EU Member States and enforced by EU Member State authorities, including Her Majesty's Treasury in the United Kingdom; United Nations sanctions policies; all relevant regulations and legislative instruments made under any of the above; other relevant economic sanctions, export and import control laws, and other laws, regulations, legislation, orders and requirements imposed by a relevant Governmental Authority. "GLP" means the then-current good laboratory practice standards promulgated or endorsed by the FDA as defined in 21 C. F. R. Part 58, and, as applicable, comparable regulatory standards promulgated by the EMA or other Regulatory Authority, as such standards may be updated from time to time, including applicable quality guidelines promulgated under the ICH. 4 Source: SIGA TECHNOLOGIES INC, 8-K, 6/3/2019 "GMP" means the standards relating to current Good Manufacturing Practices for fine chemicals, active pharmaceutical ingredients, intermediates, bulk products or finished pharmaceutical products set forth in (i) 21 U.S. C. 351(a)(2)(B), in FDA regulations at 21 C. F. R. Parts 210 and 211 and, as applicable, in The Rules Governing Medicinal Products in the European Community, Volume IV, Good Manufacturing Practice for Medicinal Products, or (ii) the ICH Guidelines relating to the manufacture of active pharmaceutical ingredient and finished pharmaceuticals, as such standards may be updated from time to time, including applicable quality guidelines promulgated under the ICH. "Governmental Authority" means any supra-national, multi-national, federal, state, local, municipal, provincial or other governmental authority or political subdivision of any nature (including any governmental division, prefecture, subdivision, department, agency, bureau, branch, office, public-institution, commission, council, court or other tribunal exercising executive, judicial, legislative, police, regulatory, administrative or taxing authority or functions of any nature pertaining to government). "ICH" means the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use. "Indemnified Party" has the meaning set forth in Section 9.3. "Indemnifying Party" has the meaning set forth in Section 9.3. "Independent Auditor" has the meaning set forth in Section 6.5. "Initial Business Plan" has the meaning set forth in Section 4.1(a). "Initial Term" has the meaning set forth in Section 11.1. "JSC" has the meaning set forth in Section 3.1(a). "Know-How" means all technical, scientific and other information, know-how and data, including trade secrets, knowledge, inventions, discoveries, methods, specifications, processes, practices, formulae, instructions, skills, techniques, procedures, experiences, ideas, technical assistance, designs, drawings, assembly procedures, computer programs, expertise, technology, other non-clinical, pre-clinical and clinical data, documentation and results (including pharmacological, toxicological, pharmaceutical, biological, chemical, physical, safety and manufacturing data and results), analytical, regulatory and quality control data and results, Regulatory Materials, study designs, protocols, assays, biological methodologies and other technical information, in each case, whether or not confidential, proprietary, patented or patentable. "Know-How" expressly excludes any Patents. 5 Source: SIGA TECHNOLOGIES INC, 8-K, 6/3/2019 "Laws" means any law, statute, rule, regulation, standard, order, judgment or ordinance having the effect of law of any applicable national, federal, provincial, state, county, city, or other political subdivision, or foreign, supranational or multinational law, including any statute, standard, code, resolution, or promulgation, or any order, writ, judgment, injunction, decree, stipulation, ruling, determination, or award entered by or with any Governmental
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Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.