Okla. Stat. tit. 19, § 266

The county clerk may charge any state agency or other state governmental entity, except child support enforcement offices operated by or for the benefit of the Oklahoma Department of Human Services, rural water districts organized pursuant to the Rural Water, Sewer, Gas and Solid Waste Management Districts Act and the Oklahoma Boll Weevil Eradication Organization for liens filed pursuant to the Boll Weevil Eradication Act, the usual and customary fee for filing any document with the county clerk and may charge the usual and customary fee for making copies of any document.