(1) Five (5) members of the commission shall constitute a quorum. Five (5) members of the commission shall vote in the affirmative before any official action can be taken by the commission. Execution of such official action may be delegated to the chairman or executive director of the commission.
(2) A vacancy in the commission shall not impair the right of the remaining members to exercise all the powers of the commission subject to the requirements of subsection (1) of this section.