5.—(1) For each hearing, the President or the Vice-President shall select a chairman, who shall, subject to regulation 7, be the President, the Vice-President or a member of the panel of chairmen, and the President or the Vice-President may select himself.
(2) In any proceedings which are to be determined by a tribunal comprising a chairman and two other members, the President or the Vice-President shall, subject to regulation 7, select one of those other members from the panel of persons appointed by the Department under regulation 4(1)(b) and the other from the panel of persons appointed under regulation 4(1)(c).
(3) In any proceedings which are to be determined by a tribunal whose composition is described in paragraph (2) or, as the case may be, regulation 7(b), those proceedings may, with the consent of the parties, be heard and determined in the absence of any one member other than the chairman.
(4) The President or the Vice-President may at any time select from the appropriate panel another person in substitution for the chairman or other member of the tribunal previously selected to hear any proceedings before a tribunal or chairman.