(a) Before any hearing, the Tribunal may require either party to give notice of the identity of witnesses it wishes to call, whether witness of fact or expert witness, as well as of the subject matter of their testimony and its relevance to the issues.
(b) The Tribunal has discretion, on the grounds of redundance and irrelevance, to limit or refuse the appearance of any witness.
(c) Any witness who gives oral evidence may be questioned, under the control of the Tribunal, by each of the parties. The Tribunal may put questions at any stage of the examination of the witnesses.