Okla. Stat. tit. 67 § 91
The board of county commissioners of any county in this state may by resolution adopt the system of photographic recording for any or all offices of the respective counties where instruments are filed which are required to be recorded in books to be kept for that purpose. Said board of county commissioners in such counties where such system of recording is adopted may purchase such machines, equipment, and supplies as may be necessary and proper to do said work and also employ a competent operator or operators to operate said machines, the salary of such operator or operators to be fixed by the board of county commissioners in such amount as they shall deem advisable. In lieu of the purchase of said machines, equipment, and supplies by the county, the board of county commissioners may, if they deem it advisable, contract with some suitable person or persons, firm, or corporation having proper machines and equipment therefor to do all recording work required to be done in any office in their respective counties and fix the compensation therefor. No contract shall be made wherein the county shall be required to pay for such work a greater price than sixty percent (60%) of the total fees charged for such recording, as fixed by law at the time said contract is entered into. The adoption of this system by any county prior to the passage of this act, and the record heretofore made by such system, are hereby validated.
Okla. Stat. tit. 67, § 91