Okla. Stat. tit. 19 § 866.7
The commission shall consist of the following members: four (4) members appointed by the mayor and confirmed by the council; four (4) members appointed by the board of county commissioners which members shall not be residents of any incorporated city or town; and one (1) member appointed by each incorporated city or town within the jurisdiction of the commission. The mayor, or a member of the governing body of the city appointed by the mayor, and chairman of the board of county commissioners, or a member of the board of county commissioners appointed by the chairman, shall be ex officio members of the commission. Members appointed by the mayor shall serve for a term of four (4) years except that the respective terms of the first two appointed shall be for a term of two (2) years and the next two appointed shall be for a term of four (4) years. Members appointed by the board shall serve a term of four (4) years except that the respective terms of the first two appointed shall be for a term of two (2) years and the next two appointed shall be for a term of four (4) years. Members appointed by an incorporated city or town shall serve at the pleasure of the appointing city or town. All members of the commission shall serve as such without compensation. The appointed members shall be residents for a period of three (3) years or more immediately preceding appointment and shall hold no other municipal or county office. Vacancies occurring otherwise than through the expiration of term shall be filled for the unexpired term by the official appointing the original holder of said membership.
A member of such commission, once qualified, can thereafter be removed during his term of office only for cause and after a hearing held before the governing body by which he was appointed.
Okla. Stat. tit. 19, § 866.7