38.—(1) A tribunal which reviews all or part of a decision may—
(a)by certificate under the chairman’s hand set aside or vary that decision and substitute such other decision as it thinks fit; or
(b)order a rehearing before the same or a differently constituted tribunal.
(2) If the decision is set aside or varied, the Secretary of the Tribunal shall alter the entry in the records to conform to the chairman’s certificate and shall notify the parties accordingly.