225 ILCS 41/15-22
At the conclusion of the hearing, a copy of the Board or hearing officer's report shall be served upon the applicant or licensee by the Department, either personally or as provided in this Code for the service of a notice of hearing. Within 20 days after service, the applicant or licensee may present to the Department a motion in writing for a rehearing, which shall specify the particular grounds for rehearing. If no motion for rehearing is filed, then upon the expiration of the time specified for filing such a motion, or if a motion for rehearing is denied, then upon denial, the Secretary may enter an order in accordance with the recommendations of the Board or hearing officer. If the applicant or licensee orders from the reporting service and pays for a transcript of the record within the time for filing a motion for rehearing, the 20-day period within which a motion may be filed shall commence upon the delivery of the transcript to the applicant or licensee.
If the Secretary believes that substantial justice has not been done in the revocation, suspension, or refusal to issue, restore, or renew a license, or other discipline of an applicant or licensee, he or she may order a rehearing by the same or other hearing officers.
225 ILCS 41/15-22