Okla. Stat. tit. 2, § 2-7
The records, files, and books of the State Board of Agriculture shall be receivable as evidence. The rules and orders of the Board, when published, shall be public notice and shall have the force and effect of law and be judicially noticed and considered. When orders of the Board consist of local rules or orders of quarantine, the order may be provable in the same manner as a return of service.
Laws 1955, HB 505, p. 3, art. 2, § 7; Amended by Laws 2000, SB 1402, c. 243, § 9, emerg. eff. May 24, 2000 (superseded document available).