(7) Where any person is required by the Commissioner to attend before him or her for the purpose of investigating any complaint, the Commissioner shall cause to be paid to such person, out of moneys provided by Parliament for the purpose, the fees, allowances and expenses, prescribed by the Supreme Court (Witnesses Allowances) Rules subject to such qualifications and exceptions as are contained therein, so, however, that the like functions as are therein contained and assigned to the Registrar of the High Court shall, for the purposes of this subsection, be exercisable by the Commissioner and he or she may, if he or she thinks fit, disallow, in whole or in part, the payment of any amount under this subsection.