Okla. Stat. tit. 65, § 65-160: Employee retirement

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

library 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 library system. In the event funds become available for

library purposes pursuant to the provisions of Section 10A of

Article X of the Oklahoma Constitution, the entire contribution on

behalf of the employees of the city-county library system may be

paid from such funds.