225 ILCS 410/4-16

An order of revocation or suspension or placing a license on probationary status or other disciplinary action as the Department may consider proper or a certified copy thereof, over the seal of the Department and purporting to be signed by the Secretary, shall be prima facie proof that: 1. the signature is the genuine signature of the Secretary; 2. the Secretary is duly appointed and qualified; and 3. the Board and the members thereof are qualified to act. Such proof may be rebutted.