(65 ILCS 5/11-101-2) (from Ch. 24, par. 11-101-2)
    Sec. 11-101-2. Whenever the corporate authorities of any municipality have established an airport outside the corporate limits of the municipality and have determined that it is essential to the proper and safe construction and maintenance of such airport to vacate any roads, highways, streets, alleys, or parts thereof in unincorporated territory lying within the airport area or any enlargement thereof, and have determined that the public interest will be subserved by such vacation, they may vacate such roads, highways, streets, alleys, or parts thereof, by an ordinance. Provided however, that such municipality shall have first acquired the land on both sides of such roads, highways, streets, alleys, or parts thereof; provided, also, that in the case of a road, highway, street or alley or part thereof, under the jurisdiction of the Department of Transportation, the consent of the Department shall be obtained before the ordinance shall become effective. Such ordinance shall be passed by the affirmative vote of at least 3/4 of all aldermen, trustees or commissioners authorized by law to be elected. Such vacation shall be effective upon passage of the ordinance and recording of a certified copy thereof with the recorder of the county within which the roads, highways, streets, alleys, or parts thereof are situated.
(Source: P.A. 83-358.)