In any case involving the refusal to issue or renew a license, or the suspension or revocation of a license, or the referral of a case for criminal prosecution, a copy of the Department’s report shall be served upon the respondent, 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 rehearing, which written motion shall specify the particular grounds therefor. 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 such denial, the Director may enter an order in accordance with recommendations of the report. If the respondent orders and pays for a transcript of the record within the time for filing a motion for rehearing, the 20 day period within which such a motion may be filed shall commence upon the delivery of the transcript to the respondent.