775 ILCS 10/4

No contractor, subcontractor, nor any person on his or her behalf shall, in any manner, discriminate against or intimidate any employee hired for the performance of work for the benefit of the State or for any department, bureau, commission, board, other political subdivision or agency, officer or agent thereof, on account of race, color, creed, sex, religion, physical or mental disability unrelated to ability, or national origin; and there may be deducted from the amount payable to the contractor by the State of Illinois or by any municipal corporation thereof, under this contract, a penalty of five dollars for each person for each calendar day during which such person was discriminated against or intimidated in violation of the provisions of this Act.