Sec. 3. MEMBERSHIP. (a) Any person except as herein provided, who is an employee of such city in the Police Department on the effective date hereof, shall be eligible for membership in the Pension System, and shall automatically become a member upon the expiration of ninety (90) days from the effective date hereof, unless the employee has filed with the Pension Board his written election not to become a member, which shall constitute a waiver of all present and prospective benefits which otherwise would inure to him by participation in the System. But any member of the Police Department of such city, whose membership in the Pension System is contingent upon his own election and who elects not to participate, may later become a member provided he passes such medical examination as the Pension Board may require. If such employee becomes a member within six (6) months after the effective date of this Act, the employee shall be eligible for prior-service credit, but if he does not become a member within such period, he shall not be eligible for prior-service credit. Written notice shall be given each and every member of the Police Department eligible for membership in the Pension System by the Secretary of the Pension Board within sixty (60) days from the passage of this Act informing him of the terms and provisions of this paragraph.

(b) Any person who hereafter becomes an employee of such city in the Police Department after the passage of this Act shall automatically become a member of the Pension System as a condition of his employment, and he will be required to sign a letter making application for Pension benefits.

(c) Part-time, seasonal, or other temporary employees shall not become, nor be eligible as, members of the Pension System except as provided in Subsections (d), (e), and (f).

(d) A city that has adopted the Pension System in this Act may make reserve, special, or part-time officers eligible as members of the Pension System by vote of the city's governing body, or the city's governing body may call an election to submit the question to the qualified voters of the city.

(e) If a special election is called, the election must be advertised by publication in at least one newspaper of general circulation in the city once each week for four consecutive weeks. The question shall be submitted to the qualified voters as follows:

"FOR: Including reserve, special, or part-time officers in the Police Pension System."

"AGAINST: Including reserve, special, or part-time officers in the Police Pension System."

(f) A city that adopts the Pension System in this Act may include reserve, special, or part-time officers in the Pension System by vote of the city's governing body, by calling a special election as provided in Subsection (e) of this Section, or by joining the question of whether or not to include those officers on the ballot which submits the proposed Police Pension System to the city's qualified voters as provided in Section 25 of this Act.