48.—(1) Any document purporting to be a document signed or issued by the Secretary on behalf of the Tribunal is, unless the contrary is proved, deemed to be a document so executed or issued as the case may be.
(2) A document purporting to be certified by the Secretary to be a true copy of a decision of the Tribunal or of any entry of a decision in the register is, unless the contrary is proved, sufficient evidence of the decision of the Tribunal or the entry and of matters contained in it.