N.Y.C. Charter § 2801: Section 2801. Actions of community boards.

a. A majority of the appointed members of any community board shall constitute a quorum of such board.

b. Whenever any act is authorized to be done or any determination or decision made by any community board, the act, determination or decision of the majority of the members present entitled to vote during the presence of a quorum, shall be held to be the act, determination or decision of such board.