Okla. Stat. tit. 40 § 2-609
A final decision of the Board of Review and the principles of law declared in arriving at such decision, unless expressly or impliedly overruled by the passage of a more recent statute, by a later decision of the Board of Review, or by a court of competent jurisdiction, shall be binding upon the Commission and Appeal Tribunal referees in subsequent proceedings which involve the same questions of law or fact. In no event shall a decision of the Board of Review, or by a court of competent jurisdiction, decided prior to a change in law by the Legislature supersede or be binding upon the Commission, Appeal Tribunal referees, Board of Review, or any court of competent jurisdiction in proceedings subsequent to the passage of statutory changes.
Okla. Stat. tit. 40, § 2-609