Ill. Admin. Code tit. 44 § 625.140
A complaint regarding any decision rendered by or action taken by any Division or Office of the Department pursuant to this Part may be filed with the Secretary of Transportation by submitting a written statement setting forth all the facts and circumstances together with the basis for making such complaint and specifically how such decision or action is alleged to be in contravention of this Part. Upon receipt of a complaint, the Secretary will determine whether, in the decision or action complained of, the Division or Office has acted in accordance with this Part and advise the person submitting the written statement as to this determination as to what additional action, if any, the Department will take. Provided, however, that any such complaint must be filed within 14 days from the time the person complaining becomes aware of the decision or action complained of or from the time information of such decision or action becomes generally available to the public, whichever occurs first.
Ill. Admin. Code tit. 44, § 625.140