The commission shall organize within ten days after its appointment, and shall elect one of its members as the chairman and one as the secretary of the commission. The commission shall thereafter meet and organize on the second Monday of each even-numbered year. Each commissioner shall be notified in writing of each meeting of the commission. Two members of the commission shall constitute a quorum, and no action of the commission shall be valid unless it shall have the concurrence of at least two members.
16 P.S. § 4504