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:
"""
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 deemed not to have been passed by the Board of Directors. If the non-passage under this Article 55 of a resolution concerning management or financial matters results in a material adverse effect on the economic benefits derived by one or both Parties from their respective investments in the Joint Venture Company, then a Party whose benefits are adversely and materially affected may terminate this Contract. Article 56 Party A shall designate a director to serve as Chairman of the Board and Party B shall designate another director to serve as Vice-Chairman of the Board. The Chairman of the Board shall be the legal representative of the Joint Venture Company, but shall have only the authority delegated to him/her by the Board of Directors, and no individual member of the Board of Directors shall contractually or otherwise bind the Joint Venture Company without the prior written authorization of the Board of Directors. The Party appointing the Chairman of the Board shall be responsible for all losses and liabilities that the Joint Venture Company may incur as a result of the Chairman of the Board exceeding the scope of authority stipulated in this Contract. Whenever the Chairman of the Board is unable to perform his responsibilities for any reason, he shall authorise the Vice-Chairman of the Board to represent him. If the Vice-Chairman is not available, the Chairman of the Board shall authorise another director to represent him/her. Article 57 The Joint Venture Company shall indemnify each director against all claims and liabilities incurred by reason of his being a director of the Joint Venture Company, provided that the director's acts or omissions giving rise to such claim or liability did not constitute intentional misconduct or gross negligence or a violation of criminal laws. Article 58 The first meeting of the Board of Directors shall be held within one (1) month from the Company Establishment Date. Thereafter, the Board of Directors shall hold at least one (1) regular meeting in each calendar year. Upon the written request of two (2) or more of the directors of the Joint Venture Page 15 Company specifying the matters to be discussed, the Chairman of the Board shall within thirty (30) days of receipt thereof convene an interim meeting of the Board of Directors. Meetings shall be held at the registered address of the Joint Venture Company or such other address in China or abroad as may be agreed by the Chairman of the Board and the Vice-Chairman of the Board. The Chairman of the Board shall set the agenda for Board meetings after consultation with the Vice-Chairman of the Board and the Chairman shall be responsible for convening and presiding over such meetings. Board meetings may be attended by directors in person or by telephone, video conference or by proxy. Article 59 Five (5) directors present in person or by proxy shall constitute a quorum for all meetings of the Board of Directors. If at any properly convened meeting, no quorum is constituted because less than five (5) directors are present in person or by proxy, then the Chairman of the Board may call another meeting with seven (7) days notice to each director. All directors receiving notice of such second meeting shall be deemed to be present at such meeting. Article 60 If a director is unable to attend a Board of Directors meeting, he may issue a proxy and entrust a representative to attend the meeting on his behalf. The representative so entrusted shall have the same rights and powers as the director who entrusted him. One person may represent more than one
"""

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