An application for an adjudicative proceeding shall be accompanied by all of the information required for requests for informal opinions and written petitions, as described in WAC 245-02-115 to 245-02-125. The applicant may incorporate by reference any materials previously provided to the commission or attorney general. Except as set forth in WAC 245-02-160 through 245-02-175, the commission adopts for its use the Model Rules of Procedure set forth in chapter 10-08 WAC.