620 ILCS 5/43b
No person while operating or riding in any type of aircraft shall cause to be dropped therefrom, any object used to publicize or advertise any product, service, activity or event, including circulars, posters, handbills or other advertising matter. No person or owner or lessee while operating or riding in any type of aircraft may cause to be dropped therefrom any other object unless he applies for, on forms prescribed and furnished by the Department, and receives from the Department a dropping permit specifying the name and address of the person authorized to make the drop; the date, time and place for which the drop is authorized to be made and the object authorized to be dropped.
Any person who violates this Section is guilty of a Class A misdemeanor.
This Section does not prohibit the otherwise lawful use of aircraft for crop dusting and other activities in aid of agriculture.
620 ILCS 5/43b