In a case involving the refusal to issue or renew a registration or the discipline of a registrant, a copy of the hearing officer’s report shall be served upon the respondent by the Department, as provided under Section 20 of this Act. Within 20 days after the service, the respondent may present to the Secretary a motion in writing for a rehearing, which shall specify the particular grounds for a rehearing. If no motion for rehearing is filed, then upon the expiration of the time specified for filing the motion, or if a motion for rehearing is denied, then upon the denial, the Secretary may enter an order in accordance with recommendations of the hearing officer, except as provided in Section 115 or 120 of this Act. If the respondent orders a transcript of the record from the reporting service and pays for the transcript 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.