Section 720 ILCS 5/11-30 - Public Indecency
Breast-feeding of infants is not an act of public indecency.
Public indecency is a Class A misdemeanor. A person convicted of a third or subsequent violation for public indecency is guilty of a Class 4 felony. Public indecency is a Class 4 felony if committed by a person 18 years of age or older who is on or within 500 feet of elementary or secondary school grounds when children are present on the grounds.