5 ILCS 420/4A-107
Any person required to file a statement of economic interests under this Article who willfully files a false or incomplete statement shall be guilty of a Class A misdemeanor; provided, a filer's statement made in reasonable, good faith reliance on the guidance provided by the Secretary of State pursuant to Section 4A-102 or his or her ethics officer shall not constitute a willful false or incomplete statement.
Except when the fees and penalties for late filing have been waived under Section 4A-105, failure to file a statement within the time prescribed shall result in ineligibility for, or forfeiture of, office or position of employment, as the case may be; provided, however, that if the notice of failure to file a statement of economic interests provided in Section 4A-105 of this Act is not given by the Secretary of State or the county clerk, as the case may be, no forfeiture shall result if a statement is filed within 30 days of actual notice of the failure to file. The Secretary of State shall provide the Attorney General with the names of persons who failed to file a statement. The county clerk shall provide the State's Attorney of the county of the entity for which the filing of a statement of economic interest is required with the name of persons who failed to file a statement.
The Attorney General, with respect to offices or positions described in items (a) through (f) and items (j), (l), (n), and (p) of Section 4A-101 of this Act, or the State's Attorney of the county of the entity for which the filing of statements of economic interests is required, with respect to offices or positions described in items (a) through (e) of Section 4A-101.5, shall bring an action in quo warranto against any person who has failed to file by either May 31 or June 30 of any given year and for whom the fees and penalties for late filing have not been waived under Section 4A-105.
5 ILCS 420/4A-107