220 ILCS 45/3
The agencies listed in Section 2 of this Act shall have the authority to investigate alleged violations of the rules adopted under this Act and to serve a notice of violation upon the affected telecommunications carrier or other communications provider. If the affected telecommunications carrier or other communications provider disputes that a violation has occurred, it shall, within 30 days after receipt of the written notice of violation, file a request for hearing on such violation before the Illinois Commerce Commission. The Commission shall conduct a hearing on such matter and enter an order thereon in accordance with the provisions of Article X of the Public Utilities Act, including the provisions for appeal of any such order. In any such hearing before the Commission, one or more of the listed agencies in Section 2 of this Act shall participate and shall present evidence of the alleged violation.
220 ILCS 45/3