65 ILCS 5/3.1-40-25: Meetings.

The city council may prescribe, by ordinance, the times and places of the council meetings and the manner in which special council meetings may be called. The mayor or any 3 alderpersons may call special meetings of the city council. In addition to any notice requirement prescribed by the city council, public notice of meetings must be given as prescribed in Sections 2.02 and 2.03 of the Open Meetings Act.