Okla. Stat. tit. 59, § 396.10

Any person desiring to engage in the profession or business of embalming or funeral directing or both, as defined herein, shall make application, be required to show all preliminary requisites, comply with the rules of the Board, and take all examinations as shall be deemed necessary by the Board in its rules. The Board shall publish in its rules the subject to be covered in the examination and the standards to be attained thereon. Changes in the rules shall be published pursuant to the Administrative Procedures Act.