70 ILCS 5/19
This act shall be deemed to be a general law, complete in itself and distinct and separate from any prior law. The provisions of this act shall be liberally construed. Nothing contained in this act shall be held to constitute a contract between the state and any municipal corporation organized hereunder, or to prevent the alteration, amendment or repeal of this act, or of any amendment thereof, at any time hereafter. The provisions of this Act shall not be considered as impairing, altering, modifying, repealing or superseding any of the jurisdiction or powers of the Illinois Commerce Commission. Nothing in this Act or done under its authority shall restrict, limit or interfere with the use of the land and facilities of a common carrier and the space above such land and facilities or the right to use such land and such facilities in the business of such common carrier, without approval of the Illinois Commerce Commission and without the payment of just compensation to any such common carrier for damages resulting from any such restriction, limitation or interference.
70 ILCS 5/19