Sections 3.43, 3.44, 3.45, and 3.46 of the Commission's Rules of Practice shall govern, respectively, the receipt and objections to admissibility of evidence, the transcript of the hearing, in camera orders and the submission and consideration of proposed findings of fact and conclusions of law except that (a) a copy of the hearing transcript shall be provided the respondent; and (b) the Commission has the burden of establishing, by a preponderance of the evidence on the record as a whole, the allegations stated in the order to show cause.