Sec. 452.563. QUORUM. (a) Six members of the subregional board are a quorum. (b) An action of the board requires a majority vote of the members present. Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995. SUBCHAPTER O. SUBREGIONAL BOARD IN SUBREGION HAVING PRINCIPAL MUNICIPALITY WITH POPULATION OF MORE THAN 1.1 MILLION