Every order (other than an order under section 1 (2)) and regulation under this Act shall be laid by the Minister before both Houses of the Oireachtas as soon as may be after it is made and, if a resolution annulling the order is passed by either such House within the next 21 days on which that House sits after the order or regulation is laid before it, the order or regulation shall be annulled accordingly but without prejudice to the validity of anything previously done thereunder.