On the application of the appellant or the respondent or otherwise, the chair may require any person to withdraw from all or any part of the hearing.

The chair may impose such conditions as the chair sees fit relating to the attendance of a person at the hearing in order to facilitate the proper conduct of the hearing.

Where a person is to give evidence as a witness at a hearing, the witness (and any person accompanying the witness) must not be allowed to attend the hearing before giving evidence.

Before excluding any person under paragraph (1) or imposing any conditions under paragraph (2), the chair must take into account any representations made under rule 18(7)(a) or (b), as the case may be.