65 ILCS 5/7-4-4
Current through Public Act 103-593
The corporate authorities in all municipalities have jurisdiction over all waters within or bordering upon the municipality, to the extent of 3 miles beyond the corporate limits, but not beyond the limits of the State. Nothing in this Section shall be construed to authorize a municipality to exercise zoning power or otherwise restrict the use of private property outside of the corporate limits of the municipality.
65 ILCS 5/7-4-4