Sch 4 para 18 Quorum
(1) Tribunal rules may make provision as to the consequences of a member of the Tribunal being unable to continue after part of any proceedings have been heard. (2) The rules may allow the Tribunal to consist of the remaining members for the rest of the proceedings. (3) The rules may enable the President, if it is the chairman of the Tribunal who is unable to continue— (a) to appoint either of the remaining members to chair the Tribunal; and (b) if that person is not a judge within any of paragraphs (aa) to (ac) of section 12(2) or a member of the panel of chairmen, to appoint himself or some other suitably qualified person to attend the proceedings and advise the remaining members on any questions of law arising. (4) For the purpose of sub-paragraph (3) a person is “ suitably qualified ” if he is, or is qualified for appointment as, a member of the panel of chairmen.