Okla. Stat. tit. 62, § 34.71
By November 1, 1983, the Director of State Finance shall establish a procedure to expedite payment for a proper invoice for goods or services not later than forty-five (45) days from the date on which the invoice is received in the appropriate office designated by the agency to which the goods or services were sold and delivered.
Laws 1983, HJR 1010, p. 1167, § 1, emerg. eff. May 24, 1983.