(1) A hearing before a disciplinary body must be open to the public, unless the disciplinary body directs that the hearing or a part of the hearing be closed to the public.
(2) A disciplinary body may not direct that a hearing or a part of a hearing be closed to the public unless satisfied that it is desirable to do so in the public interest for reasons connected with--
(a) the subject matter of the hearing; or
(b) the nature of the evidence to be given.