In all counties of this state having a population in excess of three hundred thousand (300,000) according to the 1960 Federal Decennial Census or any subsequent Federal Decennial Census, the board of law library trustees in any county establishing a county law library, in addition to the duties and authority now provided by law, are hereby authorized, from the funds in its hands, to pay the annual dues of the librarian in the National Association of Law Librarians, and in addition thereto, the necessary expenses of such librarian in attending the annual conventions of such National Association of Law Librarians.
Okla. Stat. tit. 20, § 1220