Okla. Stat. tit. 53, § 201E

There is hereby created a petty cash fund for the J.M. Davis Memorial Commission, which may be expended for small authorized expenses of the Commission. The amount of the petty cash fund shall be Five Hundred Dollars ($500.00), and the J.M. Davis Memorial Commission is authorized to prescribe forms, systems and procedures for its administration. The petty cash fund may be reimbursed from time to time by the filing of proper claims, accompanied by valid receipts for expenditures made.