8.—(1) The application of the seal of the Board shall be authenticated by the signature of any member or employee of the Board who is authorised (generally or specially) for the purpose by the Board.
(2) Any document purporting to be an instrument made or issued by the Board and to be duly executed under the seal of the Board, or to be signed or executed by a person authorised for the purpose by the Board, shall be received in evidence and treated, without further proof, as being so made or issued unless the contrary is shown.