Any party who fails to appear at a hearing will not be entitled to a further opportunity to be heard unless good cause for such failure is shown to the board or to the administrative law judge within five days thereafter. The lack of such showing of good cause may, in the discretion of the board or the administrative law judge, be interpreted as an abandonment of interest by such party in the subject matter of the proceeding.
Cal. Code Regs. Tit. 13, § 589