Okla. Stat. tit. 70, § 70-625.7: Per diem for Board members

The members of the Board shall receive no salary but shall be

paid a per diem of Twenty-five Dollars ($25.00) for each day they

are actually and necessarily engaged in the transaction of business,

together with actual and necessary expenses incurred by them in the

performance of their duties, subject to general statutory

limitations on such expenses as contained in Title 74 of the

Oklahoma Statutes, Sections 500.1, et seq.