(1) An order made under this Act takes effect at the beginning of the day on which it is made or any later time specified in the order.
(2) A document purporting to be an order made under this Act is, unless the contrary is established, taken to be such an order and to have been properly made.
(3) A certificate purporting to be signed by the Chief Minister or an officer prescribed by regulation certifying that an order mentioned in the certificate is an order made under a specified provision of this Act is admissible in evidence in any legal proceedings and is evidence of the matters certified.