Okla. Stat. tit. 14A, § 2-605
With respect to a sale other than a consumer credit sale, the parties may contract for the payment by the buyer of any credit service charge.
Laws 1969, HB 1001, c. 352, § 2-605, emerg. eff. July 1, 1969; Amended by Laws 1982, SB 643, c. 335, § 31, emerg. eff. June 1, 1982.