Conn. Agencies Regs. § 22a-39-9.3
Each order issued pursuant to Section 9.2 shall be sent by certified mail, return receipt requested, to the subject of such order and shall be deemed issued upon deposit in the mail. Any person aggrieved by any such order may, within thirty (30) days from the date such order is sent, request a hearing before the Commissioner. After such hearing the Commissioner shall consider the facts presented to him and shall revise and resubmit the order to the person or inform the person that the previous order has been affirmed. All such orders and hearings shall be issued and held in conformance with Sections 4-166 to 185 of the General Statutes, as amended, and with The Rules of Practice of the Dept. of Environmental Protection adopted pursuant to § 2 (a) of the P.A. 854 of 1971, as amended. The request for a hearing as provided for in this section shall be a condition precedent to the taking of an appeal under the provisions of Section 10 of these regulations. The Commissioner may, after the hearing provided for in this section, or at any time after the issuance of his order, modify such order by agreement or extend the time schedule therefor if he deems such modification or extension to be advisable or necessary. Any modification or extension shall be deemed to be a revision of an existing order and shall not constitute a new order.
Conn. Agencies Regs. § 22a-39-9.3