(a) A respondent shall be in default when the respondent has:
(1) Failed to serve a written response pursuant to section 24-260 of this code; or
(3) Neglected to proceed in a manner ordered by the board.
(b) Within sixty days of a decision and order of the board issued pursuant to paragraph two of subdivision (c) of section 24-266 of this subchapter, the respondent may request the board to grant a stay of such order of the board and schedule a hearing. If the respondent has shown good cause and a meritorious defense, the board may grant such a request and hold a hearing pursuant to section 24-263 of this code. At the conclusion of the hearing, the board may adopt, amend or rescind its decision and order.