Okla. Stat. tit. 2, § 2-2-8: Certified copies as evidence

Duly-certified copies of any book, record, file, or proceeding,

or any part, shall be competent as a matter of evidence in court

when certified as a copy by the officer in charge of the book, file,

record proceeding or part thereof or by the President or Secretary

of the State Board of Agriculture.