Okla. Stat. tit. 40, § 2-606
The Board of Review shall review the record of an appeal filed by any of the parties entitled to notice on a determination of an appeal tribunal referee. An appeal to the Board of Review may be filed in any manner allowed by Section 1-224 of this title. On such further appeal the Board of Review may affirm, modify or reverse any decision of an appeal tribunal referee on the basis of evidence previously submitted, or on the basis of additional evidence as it may adduce, or, at its direction, received by an appeal tribunal referee. The Board of Review may conduct a formal hearing upon a request of a party or on its own motion. Any formal hearing shall be conducted by one or more members of the Board of Review as it may determine or by a hearing officer designated by the Board of Review. The Board of Review shall promptly notify the parties of its findings and decision, and such decision shall be final unless within ten (10) days after the mailing of notice thereof to the parties' last-known addresses, a proceeding for judicial review is initiated.
Laws 1980, SB 637, c. 323, § 2-606, eff. October 1, 1980; Amended by Laws 1982, HB 1808, c. 304, § 9, eff. October 1, 1982; Amended by Laws 2004, SB 1288, c. 102, § 5, eff. November 1, 2004 (superseded document available).