CFR /  Title 33  /  Part 20  /  Sec. 20.705 Failure to appear.

The ALJ may enter a default under Sec. 20.310 against a respondent threatening to fail, or having failed, to appear at a hearing unless,--

(a) Before the time for the hearing, the respondent shows good cause why neither the respondent nor his or her representative can appear; or,

(b) 30 days or less after an order to show good cause, the respondent shows good cause for his or her failure to appear.