15.—(1) The President or the nominated chairman may, if he thinks that any question arises in relation to the case on which it would be desirable for the Tribunal to have the assistance of an expert, appoint a person having appropriate qualifications to enquire into and report on the matter.
(2) Subject to regulation 16, the Secretary must supply the parties with a copy of any written report received under paragraph (1) in advance of the hearing or, if the case is to be determined without an oral hearing, before the case is determined.
(3) If the President or the nominated chairman sees fit, he may direct that the expert shall attend the hearing (if any), and give evidence.
(4) The Tribunal shall pay such reasonable fees as the President or the nominated chairman may determine to any person appointed under this regulation.