The party seeking additional discovery under Rules 3.2 and 3.3 of this chapter shall bear the expenses thereof, including the costs of transcripts, with copies for the opposing party. If respondent is indigent, the Chair of the Board may direct that discovery expenses incurred by respondent be paid in whole or in part by the Board. Deponents whose depositions are taken shall be entitled to the same fees as are paid to witnesses pursuant to Section 18(a) of Rule XI. Such fees and all other costs of the deposition shall be paid by the participant at whose instance the deposition is taken.