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

(2) The petition for review shall be made, by mail or otherwise, with the board within twenty calendar days of the date of mailing of the initial decision unless the decision specifies otherwise together with proof of service pursuant to WAC 456-09-345.

(3) The petition for review shall specify the portions of the initial decision 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 make a reply to a petition for review. The reply shall be made, by mail or otherwise, with the board together with proof of service pursuant to WAC 456-09-345 within ten business days of the date of the letter acknowledging receipt by the board of the petition for review.

(5) The disposition may be in the form of a written order denying the petition and adopting the initial decision as the final decision, granting the petition and issuing a final decision, or granting the petition and setting the matter for further hearing. The board may require the parties to submit written briefs or statements of position or to appear and present oral argument regarding the matters on which review was sought, within such time and on such terms as may be prescribed.