Decisions of the Committee shall be by majority vote of the members present and voting and a quorum must be present: Provided, That decisions on marketing policy, grade or size regulations, pack specifications, salable and reserve percentages, and on any matters pertaining to the control or disposition of reserve prunes or to prune plum diversion pursuant to § 993.62, including any delegation of authority for action on such matters and any recommendation of rules and procedures with respect to such matters, including any such decision arrived at by mail or telegram, shall require at least 14 affirmative votes. A quorum shall consist of at least 13 members of whom at least 8 must be producer members and at least 4 must be handler members. Except in case of emergency, a minimum of 5 days notice must be given with respect to any meeting of the Committee. In case of an emergency, to be determined within the discretion of the chairman of the Committee, as much notice of a meeting as is practicable in the circumstances shall be given. The Committee may vote by mail or telegram upon due notice to all members, but any proposition to be so voted upon first shall be explained accurately, fully, and identically by mail or telegram to all members. When any proposition is submitted to be voted on by such method, one dissenting vote shall prevent its adoption.