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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2.1 (Use of Master Copy), 2.2 (Sublicensing) and 2.8 (Trademarks and Copyright).). 6. AMENDMENT OF SECTION 13.1. The Distributor Agreement is hereby amended by adding the following sentence to the end of Section 13.1: Notwithstanding the foregoing, the foregoing limitation on liability shall not be applicable in respect of any liability of Licensor to Licensee resulting from any misrepresentation in, or breach of, the terms of Section 6.2 hereof or in respect of Licensor's obligation to repay Royalty Advances pursuant to Section 3.2 hereof. 7. CHANGE OF ADDRESSES FOR NOTICE. Section 15.2 of the Distributor Agreement is hereby amended by changing the address for notice to each of Licensor and Licensee to the following: 14100 Southwest Freeway, Suite 500 Sugar Land, Texas 77478 Attn: President 8. ADDITION OF RIGHT OF FIRST REFUSAL. The Distributor Agreement is hereby amended by adding thereto a new Section 15.11 and a new Section 15.12, which shall read in their entirety as follows: Section 15.11 Right of First Refusal. If, at any time or from time to time during the term hereof, Licensor or any stockholder in Licensor shall have received a bona fide offer from any person or entity to sell, transfer or otherwise convey all or any stock in, or assets of, Licensor which Licensor or such stockholder, as the case may be (the "Offeree"), desires to accept, the Offeree shall first give written notice (the "Offering Notice") to Licensee of the financial and other terms and conditions (the "Terms and Conditions") of such offer. Licensee shall have the right and a first opportunity to purchase, lease or otherwise acquire, as the case may be, all or the applicable portion of such stock or assets (as specified in the applicable Offering Notice) on the Terms and Conditions set forth in the Offering Notice, such right to be exercised by notice in writing to the Offeree within ninety (90) days after the giving of the Offering Notice. If Licensee shall have exercised such right, the closing shall be held at the corporate offices of Licensee on the closing date specified in the Offering Notice or the date that is ninety (90) days after the date of Licensee's notice of its exercise of such right, whichever is later. If either party shall default under this Section, the other party shall be entitled to specific performance. If Licensee shall fail to give notice of the exercise of its right of first 4 refusal under this Section within such ninety (90) day period, or if Licensee shall notify the Offeree within such ninety (90) day period that Licensee has waived such right, then the Offeree shall have the right to sell, transfer or convey all or the applicable portion of the stock in, or assets of, Licensor (as specified in the Offering Notice) pursuant to the terms of the specific offer described in the applicable Offering Notice, but not otherwise. If such sale, transfer or conveyance is not consummated in accordance with the offer and the Terms and Conditions specified in the applicable Offering Notice, the rights of Licensee to an Offering Notice shall be reinstated. No exercise or waiver by Licensee of any of its rights hereunder shall modify, abridge, impair or affect any of Licensee's rights under any of the other terms or provisions of this Agreement. Any sale, transfer or other conveyance of all or any part of the stock in, or assets of, Licensor in violation of this Section shall be null and void. Skunkware, Inc., a Delaware corporation and the sole stockholder of Licensor ("Skunkware"), is joining in this Agreement for the purpose of agreeing to the terms of this Section and Section 15.12. Section 15.12 OPTION TO PURCHASE. Skunkware and Licensor hereby grant to Licensee the exclusive and irrevocable right and option to purchase (the "Option"), at Licensee's election, either (i) all of the assets of Licensor or (ii) all of the issued and outstanding stock of Licensor. Such option shall be exercisable during a period (the "Option Period") commencing on and including the earlier of (i) the date upon which Licensee shall have paid to Licensor, in any single fiscal year of Licensee, royalty payments hereunder in the aggregate amount of $10,000,000 or (ii) January 1, 2002, and ending upon the expiration or sooner termination of this Agreement. Licensee's exercise of the Option is at its sole discretion. Licensee may exercise the Option by written notice to Licensor and Skunkware at any time during the Option Period. Upon any such
"""

Extract the exact clause related to "Effective Date" from the excerpt above.

assistant: Not found.