The Board shall meet at least once every three-month period. Additional meetings may be held upon call of the chairman, vice-chairman, in the absence of the chairman, or the secretary. Four voting members of the Board shall constitute a quorum. No question before the Board shall be resolved without the concurrence of at least four members or a majority of those members voting, whichever is the greater.
Okla. Stat. tit. 65, § 2-105