50 ILCS 105/4

Any alderperson, member of a board of trustees, supervisor or county commissioner, or other person holding any office, either by election or appointment under the laws or constitution of this state, who violates any provision of the preceding sections, is guilty of a Class 4 felony and in addition thereto, any office or official position held by any person so convicted shall become vacant, and shall be so declared as part of the judgment of court. This Section does not apply to a violation of subsection (b) of Section 2a.