740 ILCS 137/10: Breastfeeding Location.

A mother may breastfeed her baby in any location, public or private, where the mother is otherwise authorized to be, irrespective of whether the nipple of the mother's breast is uncovered during or incidental to the breastfeeding; however, a mother considering whether to breastfeed her baby in a place of worship shall comport her behavior with the norms appropriate in that place of worship.