(a) Any person interested in an order of the commission may request rehearing within 30 days of service of the order. The petition for rehearing shall, pursuant to section 3.5 of this Part, be filed with the secretary and at the same time be served on each party to the proceeding.

(b) Rehearing may be sought only on the grounds that the commission committed an error of law or fact or that new circumstances warrant a different determination. A petition for rehearing shall separately identify and specifically explain and support each alleged error or new circumstance said to warrant rehearing.

(c) Any party may respond to a petition for rehearing within 15 days of the date the petition was served on the responding party, but the commission may deny a petition before that time has elapsed. Pursuant to section 3.5 of this Part, a response shall be filed with the secretary, and at the same time be served on each party to the proceeding. Replies to responses will not be entertained except in extraordinary circumstances.

(d) The filing of a petition for rehearing does not in itself stay or excuse compliance with an order.