(1) The Board shall as soon as may be after its establishment provide itself with a seal.

(2) The seal of the Board shall be authenticated by the signature of the chairman of the Board or some other member thereof authorised by the Board to act in that behalf and the signature of an officer of the Board authorised by the Board to act in that behalf.

(3) Judicial notice shall be taken of the seal of the Board, and every document purporting to be an instrument made by the Board and to be sealed with the seal (purporting to be authenticated in accordance with this section) of the Board shall be received in evidence and be deemed to be such instrument without further proof unless the contrary is shown.