No applicant for appointment pursuant to the provisions of this Act, either directly or indirectly, shall pay or promise to pay, any money or other valuable thing to any person whatever, for or on account of his appointment or proposed appointment, and no officer or employee subject to this Act shall pay or promise to pay, either directly or indirectly, any person any money or other valuable thing whatever, for or on account of his promotion or proposed promotion.
110 ILCS 70/42