Okla. Stat. tit. 59, § 858-352
A broker may enter into a written brokerage agreement to provide services as either a single-party broker or a transaction broker. If a broker does not enter into a written brokerage agreement with a party, the broker shall perform services only as a transaction broker.
Added by Laws 1999, HB 1178, c. 194, § 2, eff. November 1, 2000.