Okla. Stat. tit. 19, § 904.4

The board of directors shall establish a time and place for regular meetings, and in addition thereto, shall hold such special meetings as may be required for the proper transaction of business. A simple majority of the members of the board shall constitute a quorum for the transaction of business and upon all questions requiring a vote there shall be a concurrence of a simple majority of the members of the entire board. All records of said board shall be open to the inspection of any elector during business hours.