Okla. Stat. tit. 59, § 1938
The State Commissioner of Health shall have the power to issue licenses by endorsement for applicants licensed in other states to practice as a behavioral practitioner or under similar title if the Commissioner deems such states to have qualifications and standards comparable to those required under the Licensed Behavioral Practitioner Act.
Laws 1999, SB 380, c. 133, § 2, emerg. eff. April 28, 1999.