Ill. Admin. Code tit. 26 § 150.15
Any person who believes that a violation of any provision of Title III of the Act has occurred, or is occurring, or is about to occur may file a complaint with the State Board of Elections. If filed after the occurrence of the violation, the complaint must be filed no later than 90 days after the occurrence of the violation or 90 days after the federal election in connection with which the violation occurred, whatever date is later. Any complaint filed under this Section must allege a violation, or threatened violation, of Title III of the Act and state sufficient facts as to constitute a cause of action under Title III. In addition, the complaint must state whether the complainant desires a hearing on the record before the State Board of Elections.
Ill. Admin. Code tit. 26, § 150.15