The board may dismiss an appeal on its own motion when:

(1) An appellant has failed to provide information required under WAC 357-52-020;

(2) The parties have notified the board that the case has been settled and the appeal has not been withdrawn within thirty calendar days of the notice of settlement;

(3) An appeal is not filed on time;

(4) The board lacks jurisdiction over the subject matter or parties to the appeal;

(5) A party fails to participate in a prehearing conference as described in WAC 357-52-095; or

(6) The board is unable to contact the appellant at the last address and telephone number provided by the appellant.