220 ILCS 10/19

(1) This Act, being necessary for the welfare of the State and its inhabitants, shall be liberally construed to effect its purposes. (2) Nothing in this Act shall be construed to limit the right of any person to initiate, intervene in, or otherwise participate in any regulatory agency proceeding or court action, nor to require any petition or notification to the corporation as a condition precedent to the exercise of such right, nor to relieve any regulatory agency or court of any obligation, or to affect its discretion, to permit intervention or participation by any person in any proceeding or action.