625 ILCS 5/4-212.1

In cities with more than 500,000 inhabitants, the corporate authorities may, by ordinance, designate any department of municipal government to do any of the following: (1) To perform any of the duties and functions specified for law enforcement agencies in subsection (a) of Section 4-205 and in Sections 4-201, 4-203, 4-204, 4-206, 4-207, 4-208, 4-209, 4-210, 4-211 and 4-212; and (2) To authorize a towing service to remove and take possession of abandoned, lost, stolen or unclaimed vehicles, in the manner that municipal police may make such authorization pursuant to Section 4-202; and (3) To send notifications as required under subsection (b) of Section 4-205.