225 ILCS 345/19
In any case involving the refusal to issue or renew or the suspension or revocation of license the Director of the Department after the hearing, or, if the respondent failed to appear, on the date set for the hearing, shall enter an order of suspension, revocation or refusal, as the case may require, or dismiss the case, a copy of which order shall be served upon the respondent by the Department, either personally or by registered or certified mail as provided in this Act for the service of the notice of hearing. Within 20 days after such service, the respondent may present to the Department a motion in writing for a re-hearing, which written motion shall specify the particular grounds therefor. If no motion for re-hearing 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 such denial, the original order of the Director shall become final. No more than one rehearing shall be allowed. If the respondent shall order and pay for a transcript of the record within the time for filing a motion for rehearing, then the 20 day period within which such a motion may be filed shall commence upon the delivery of the transcript to the respondent.
225 ILCS 345/19