(1) The Commission shall immediately upon its establishment provide itself with a seal.
(2) The seal of the Commission shall be authenticated by the signature of the Chairman or some other member of the Commission authorised by the Commission to act in that behalf and the counter-signature of the secretary or some other person authorised by the Commission to act in that behalf.
(3) Every document purporting to be an order or other instrument issued by the Commission and to be sealed with the seal of the Commission authenticated in the manner provided by this section shall be received in evidence and shall until the contrary is shown be deemed to be such order or instrument without proof of the authority or signatures of the persons signing or countersigning the same.