If the respondent fails to file a notice of defense or fails to appear at the hearing, the Board may take action based upon the respondent’s express admissions or upon other evidence, and affidavits may be used as evidence without any notice to respondent; and where the burden of proof is on the respondent to establish that the respondent is entitled to the Board action sought, the Board may act without taking evidence. Nothing herein shall be construed to deprive the respondent of the right to make any showing by way of mitigation. (Amended by Ord. No. 158,410, Eff. 11/27/83.)