(a) On or after July 1, 2000, the Retirement Commission may create a deferred retirement option plan and prescribe the manner in which such option plan may be adopted by a municipality participating in the Municipal Employees’ Retirement Fund, provided the method of adoption is in accordance with subsection (c) of this section. If created, such plan shall permit members of the Municipal Employees’ Retirement Fund who are eligible for a service retirement allowance to elect participation in such plan, provided such plan has been adopted by the participating municipality that employs such member.

(b) The deferred retirement option plan shall include a fixed period of time for member participation, not to exceed five years, and a specified rate of interest credit for member accounts. All other provisions of the deferred retirement option plan shall be as determined by the Retirement Commission, provided the structure of such plan is certified by the consulting actuary to the Municipal Employees’ Retirement Fund as having no anticipated impact on the contribution rates for municipalities participating in said fund.

(c) Any municipality participating in the Municipal Employees’ Retirement Fund shall have the option of adopting the deferred option plan for its members. Such adoption shall be in a manner prescribed by the Retirement Commission.