Okla. Stat. tit. 14A, § 3-605
With respect to a loan other than a consumer loan, the parties may contract for the payment by the debtor of any loan finance charge, not in excess of the rate of loan finance charge specified in Section 5-107(2).
Laws 1969, HB 1001, c. 352, § 3-605, emerg. eff. July 1, 1969; Amended by Laws 1982, SB 643, c. 335, § 50, emerg. eff. June 1, 1982.