(b) in the case of any other kind of
decision (including an ancillary decision) of the Tribunal at first
instance--as of right on any question of law, or with the leave of the
Appeal Panel, on any other grounds.
(a) decide to
deal with the internal appeal by way of a new hearing if it considers that the
grounds for the appeal warrant a new hearing, and
(b) permit such fresh
evidence, or evidence in addition to or in substitution for the evidence
received by the Tribunal at first instance, to be given in the new hearing as
it considers appropriate in the circumstances.