Okla. Stat. tit. 11, § 11-48-101: Authorization to provide retirement fund and system

The governing body of any municipality may provide by ordinance

for a retirement fund and system for any or all of its employees and

the employees of a duly constituted authority of the municipality

which are not otherwise provided for by a pension or retirement

system. The governing body may establish said retirement system as

delayed compensation in order to encourage continuous and

meritorious service on the part of employees and thereby promote

public efficiency, and may provide retirement allowances and other

benefits for said employees, their surviving spouses, and surviving

children. The retirement fund and system may include all municipal

employees whether they are engaged in a governmental or

nongovernmental function of the municipality or the municipal

authority. The retirement fund shall be supported wholly by the

municipality or municipal authority or by joint contributions by the

municipality or authority and the employee to be benefited.