13.—(1) Where a person to whom notice of an oral hearing is given wishes to request a postponement of that hearing, he shall do so in writing to the clerk to the appeal tribunal stating his reasons for the request, and the clerk to the appeal tribunal may grant or refuse the request as he thinks fit or may pass the request to a legally qualified panel member who may grant or refuse the request as he thinks fit.
(2) Where the clerk to the appeal tribunal or, as the case may be, the legally qualified panel member, refuses a request to postpone the hearing he shall—
(a)notify in writing the person making the request of the refusal; and
(b)place before the appeal tribunal at the hearing both the request for the postponement and notification of its refusal.
(3) The legally qualified panel member or the clerk to the appeal tribunal may of his own motion at any time before the beginning of the hearing postpone the hearing.
(4) An oral hearing may be adjourned by the appeal tribunal at any time on the application of any party to the proceedings or of its own motion.
(5) Where a hearing has been adjourned and it is not practicable, or would cause undue delay, for it to be resumed before an appeal tribunal consisting of the same member or members the appeal shall be heard by a differently constituted appeal tribunal and the proceedings shall be by way of a complete rehearing.