Ill. Admin. Code tit. 50, § 2402.290
b) Unauthorized ex parte communications shall consist of:
2) any oral communication of any kind about the hearing unless:
c) Authorized ex parte communications shall consist of:
6) any communication by persons other than:
g) The Director may, to the extent not prohibited by law, institute and enforce any or all of the following sanctions against any party who makes, or solicits the making of, an authorized ex parte communication or who fails to report to the Director such a communication: