The Board shall prepare an official record, which shall include all pleadings, testimony, exhibits, and other memoranda or material filed in the proceeding. Unless waived by all parties, a stenographic record of the proceedings shall be made at the expense of the Board. This record need not be transcribed, however, unless requested by a party, or by the Board. The cost of any typewritten transcripts of any proceeding, or part of a proceeding, shall be paid by the party requesting the transcript.