112.62 Application.—The provisions of this part are applicable to any and all units, agencies, branches, departments, boards, and institutions of state, county, special district, and municipal governments which participate in, operate, or administer a retirement system or plan for public employees, funded in whole or in part by public funds. The provisions of this part supplement and, to the extent there are conflicts, prevail over the provisions of existing laws and local ordinances relating to such retirement systems or plans.