Okla. Stat. tit. 19 § 1010
If, pursuant to the provisions of Chapter 37 of Title 11 of the Oklahoma Statutes or of any statute supplemental thereto or of any charter provision of the city, a retirement system is established for the employees of the city, the employees of the city-county park and/or recreation system may be included in that retirement system on the same basis applicable to employees of the city, if the commission so recommends and the board of county commissioners and the governing body of the city approve. Nothing otherwise provided by law shall operate to prohibit the appropriation of county funds for the payment of the county's pro rata share of the contribution to be made to the retirement fund on behalf of the employees of the city-county park and/or recreation system. The city-county park and recreation commission may, from funds appropriated for its use and operation, procure and make available coverage for its employees under the Workers' Compensation Act either by purchase of insurance or by contract or plan of self insurance.
Okla. Stat. tit. 19, § 1010