410 ILCS 130/140
A unit of local government may enact reasonable zoning ordinances or resolutions, not in conflict with this Act or with Department of Agriculture or Department of Financial and Professional Regulation rules, regulating registered medical cannabis cultivation center or medical cannabis dispensing organizations. No unit of local government, including a home rule unit, or school district may regulate registered medical cannabis organizations other than as provided in this Act and may not unreasonably prohibit the cultivation, dispensing, and use of medical cannabis authorized by this Act. This Section is a denial and limitation under subsection (i) of Section 6 of Article VII of the Illinois Constitution on the concurrent exercise by home rule units of powers and functions exercised by the State.
410 ILCS 130/140