820 ILCS 185/63

In addition to an individual who is an employer pursuant to Section 5 of this Act, any officer of a corporation or agent of a corporation who knowingly permits such employer to violate the provisions of this Act may be held individually liable for all violations and penalties assessed under this Act. This Section shall not apply to an individual who is an officer or agent of a corporation which on the project under investigation satisfies the responsible bidder requirements set forth in the Illinois Procurement Code.