43.—(1) The Tribunal may, either on the written request of a relevant person or on its own initiative, consider and determine any interim or preliminary matter in relation to the case including any matter for which specific provision is made in this Part.
(2) Any matter referred to in paragraph (1) may be considered by the Convener alone or with such other members as the Tribunal may direct
(3) Before determining such a matter, the Tribunal or the Convener, as the case may be, may–
(a)send notice to any of the relevant persons inviting them to make written representations within such period as may be specified; or
(b)summon any of the relevant persons to appear before the Tribunal or Convener for a preliminary hearing and may give any necessary directions relating to their appearance.