Where the Minister has appointed a person to determine an appeal under section 21 above, the Minister may, at any time before the determination of the appeal, appoint another person to determine it instead of the first-mentioned person.
If before the appointment of a person under this section to determine an appeal, the Minister had with reference to the person previously appointed, asked the question referred to in section 21(6) above, the question need not be asked again with reference to the person appointed under this section and any answers to the question shall be treated as given with reference to him, but—
(a) the consideration of the appeal or any inquiry or other hearing in connection therewith, if already begun, shall be begun afresh ; and
(b) it shall not be necessary to afford any person an opportunity of making fresh representations or modifying or withdrawing any representations already made.