(1) Any party to an adjudicative proceeding may file a petition for review of an initial order.

(2) The petition for review shall be filed with the director within 20 days of the date of service of the initial order as specified in the initial order in the statement describing available procedures for administrative relief. Copies of the petition shall be served upon all other parties or their representatives at the time the petition is filed.

(3) The petition for review shall specify the portions of the initial order to which exception is taken and shall refer to the evidence of record which is relied upon to support the petition.

(4) Any party may file a reply to a petition for review. The reply shall be filed with the director within 10 days of the date of service of the petition and copies of the reply shall be served upon all other parties or their representatives at the time the reply is filed.

(5) An initial order resulting from an adjudicative proceeding becomes final without further agency action unless, within 20 days of service of the initial order, either party files and serves a petition for review of the initial order as required in subsection (2) of this section.