(a) A party to a proceeding may be deemed to be in default if that party fails:
- (1) To appear, in person or through a representative, at a hearing or conference of which that party has been notified;
- (2) To answer, to respond to a dispositive motion within the time provided, or otherwise to defend the proceeding; or
- (3) To cure a deficient filing within the time specified by the Commission or the presiding officer.