Sec. 2.06. MEETINGS; QUORUM. (a) The board shall hold regular monthly meetings and special meetings at the call of the presiding officer or on written demand by a majority of the members of the board.

(b) A quorum of the board is five members. When a quorum is present, action of the board that requires a vote may be taken by a majority of the members present. Any action taken by less than a quorum is not binding on the board.