(a) The governing body of a participating municipality by ordinance may authorize the granting of prior service credit in the retirement system for service performed in a public hospital, utility, or other public facility currently operated by the municipality, during a time the facility was operated by a unit of government other than the municipality and before:
(1) the effective date of the municipality's participation in the retirement system, if the facility was acquired by the municipality before that date; or
(2) the date of acquisition of the facility, if the facility was acquired after the effective date of the municipality's participation in the retirement system.
(b) A member eligible to receive credit under this section after an ordinance is adopted under Subsection (a) is one who was employed by the municipality at a public facility:
(1) on the effective date of the municipality's participation, for service under Subsection (a)(1); or
(2) on the date of acquisition of the facility, for service under Subsection (a)(2).
(c) All credit authorized by a municipality under this section is treated as if it were performed for the municipality.