55 ILCS 5/5-1046
A county board may purchase, lease or otherwise acquire and maintain and operate, a radio broadcasting station, for police and fire protection purposes only, in its county, or may join with one or more counties in this State in purchasing, leasing or otherwise acquiring and maintaining and operating a radio broadcasting station, for police or fire protection purposes only, in said counties, the broadcasting station to be equipped to send messages to and receive messages from peace officers and fire protection officers and employees; and may purchase or otherwise acquire radio receiving sets and equipment necessary for receiving messages from and sending messages to the broadcasting station and may furnish such receiving sets and equipment to peace officers and fire protection officers and employees in the county or counties for use by them, for police and fire protection purposes only.
55 ILCS 5/5-1046