Whenever any person has served or hereafter serves as a duly elected alderperson or member of the city council of any city of more than 500,000 inhabitants and is or hereafter becomes a contributing participant in any pension fund or any annuity and benefit fund in existence in such city by operation of law, the period of service as such alderperson or member of the city council shall be counted as a period of service in computing any annuity or pension which such person may become entitled to receive from such fund upon separation from the service, except as ruled out for minimum annuity purposes in Section 8-232(a)(3).
40 ILCS 5/8-243