(1) The seal of each Minister who is a head of a Department of State established under this Act shall, when affixed to any instrument or document, be authenticated by the signature of such Minister, or of some person authorised by that Minister to act in that behalf.
(2) Every document purporting to be an order or other instrument issued by a Minister who is the head of a Department of State established by this Act, and to be sealed with the seal of such Minister authenticated in manner aforesaid, or to be signed by such Minister, shall be received in evidence and be deemed to be such order or instrument without further proof, unless the contrary is shown.
(3) A certificate signed by a Minister that any order or other instrument purporting to be made or issued by such Minister, or by the Department of State for the time being assigned to him, or by any branch or officer thereof, is so made or issued, shall be conclusive evidence of the fact so certified.
(4) Nothing in this Act shall r
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