(1) To the extent these rules do not provide for or specify procedures, or where necessary to supplement these rules, the department and commission may apply the provisions of the Montana Administrative Procedure Act, Montana Rules of Civil Procedure, Montana Uniform District Court Rules or Montana Rules of Evidence. Those procedural provisions are applicable to the extent they may clarify fair procedures, expedite determinations, and assist in the adjudication of rights, duties or privileges of parties before the commission.