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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It is the intention of the parties that no less than 50% of the Joint Venture Products should be sold overseas. Article 50 Each Party retains all ownership to its trademarks, service marks, logos, trade names, and similar designations identified in Exhibit B of the Contract for Technology Investment and any other such marks which such Party may from time to time designate in writing, and the other Party and the Joint Venture Company will neither register or use, directly or indirectly, any mark that is identical or confusingly similar to Valence's marks or any translations or transliterations thereof, anywhere in the world. Notwithstanding the foregoing, the Joint Venture Company may register its own trademarks, service marks, logos and trade names, and it may use the marks owned by a Party without compensation, provided that the use is in accordance with terms of a written trademark license contract signed with that Party. CHAPTER 10 THE BOARD OF DIRECTORS Article 51 The date of registration of the Joint Venture Company shall be the date of the establishment of the board of directors of the Joint Venture Contract. Page 13 Article 52 The Board of Directors shall comprise seven (7) directors, three (3) of whom shall be appointed by Party A and four (4) of whom shall be appointed by Party B. The chairman of the board shall be appointed by Party A, and its vice-chairman by Party B. Article 53 Directors shall be appointed for a term of four (4) years, provided that the Party who has appointed a director may remove that director and appoint a replacement at any time. A director may serve consecutive terms if reappointed by the Party that originally appointed him/her. If a seat on the Board of Directors is vacated by the retirement, resignation, disability or death of a director or by the removal of such director by the Party who originally appointed him/her, the Party who originally appointed such director shall appoint a successor to serve out such director's term. At the time this Contract is signed and each time a director is appointed or replaced, each Party shall notify the other Party in writing of the names of its appointees or replacements. Article 54 The Board of Directors shall be the highest authority of the Joint Venture Company. It shall decide all matters of major importance to the Joint Venture Company. The following matters shall require the unanimous assent of all the directors: o Amendment of the Articles of Association; o Termination and dissolution of the Joint Venture Company; o Merger of the Joint Venture Company with another organization; o Major investment by the Joint Venture Company; o Distribution of profit of the Joint Venture Company; o The recruitment and dismissal of the Senior Management Personnel of the Joint Venture Company; o Transfer of a part of all of either Party's interest in the registered capital of the Joint Venture Company; o Increase and decrease of the Joint Venture Company's registered capital; and o The examination and approval of the annual financial report of the Joint Venture Company. Article 55 Except for the matters stipulated in the above article, all other matters shall be decided by the assent of a majority of the directors present in person or by proxy at a duly convened meeting of the board of Page 14 directors, provided however that at least one member of the Board of Directors nominated by each Party assents to such decision of the Board If a vote on any resolution (other than resolutions requiring unanimous assent) results in a failure to obtain an affirmative vote, then the directors promptly shall endeavour to resolve the matter through further consultations. Any director shall have the right to call a meeting for a second vote on the matter after seven (7)days has elapsed from the first vote. If the second vote also results in a failure to obtain an affirmative vote, then the Chairman and Vice-Chairman of the Board shall jointly refer the matter to the highest executive officer of each Party within seven (7) days from the second vote, and they shall endeavour to agree on a resolution of the matter, which resolution shall be binding upon the Board of Directors and the Joint Venture Company. If the highest executive officers of each Party are unable to resolve the matter within thirty (30) days from the date of receipt of the referral from the Chairman and Vice-Chairman of the Board, the resolution shall be
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Extract the exact clause related to "Effective Date" from the excerpt above.