40 ILCS 5/8-110: Employer.

"Employer":

(1) a city of more than 500,000 inhabitants;

(2) the Board of Education of the city, with respect to any of its employees who participate in this Fund;

(3) the Chicago Housing Authority, with respect to any of its employees who participate in this Fund subject to the provisions of Section 8-230.9;

(4) the Public Building Commission of the city, with respect to any of its employees who participate in this Fund; and

(5) the Retirement Board.