Okla. Stat. tit. 74, § 74-500.36: Per diem and other reimbursements for expenses not

authorized for state boards and commissions - Certain statutory

salaries excepted.

Effective July 1, 1985, no members of Oklahoma boards and

commissions shall receive per diem payments or reimbursements for

expenses other than those specifically authorized by Sections 500.1

through 500.54 of Title 74 of the Oklahoma Statutes or Section 1501-

605 of Title 82 of the Oklahoma Statutes or except as otherwise

provided by law. Provided that this section is not intended to

prohibit the payment of statutory salaries to members of the

Oklahoma Tax Commission, the Oklahoma Transportation Commission and

the Oklahoma Pardon and Parole Board.