4.121—Unexcused absence of a party.
The unexcused absence of a party at the time and place set for hearing will not be occasion for delay. In the event of such absence, the hearing will proceed and the case will be regarded as submitted by the absent party as provided in § 4.112. The Board shall advise the absent party of the content of the proceedings had and that he has 5 days from the receipt of such notice within which to show cause why the appeal should not be decided on the record made.