Okla. Stat. tit. 20, § 1201

A. A county law library may be established in each county of this state. Law libraries in counties having a population of less than three hundred thousand (300,000) shall be established and operated in accordance with rules adopted by the Supreme Court. Law libraries in counties having a population of three hundred thousand (300,000) or more shall be established and operated in accordance with Section 1202 et seq. of this title. B. County law libraries shall be open to the judges of the state, to state officials, to all the judges of the district, to all county officials, to the members of the Bar, and to the inhabitants of the county, free of charge under proper regulation provided, the Administrative Director of the Courts with approval of the Chief Justice shall establish uniform reasonable charges for the use of services and equipment, including, but not limited to, computer- assisted research, computers, facsimile machines, copiers, and telephone lines.