4.—Every order (other than an order made under section 1(2)) or regulation made by the Minister under this Act shall be laid before each House of the Oireachtas as soon as practicable after it is made and, if a resolution annulling the order or regulation is passed by either House within the next subsequent 21 days on which that House has sat 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 under the order or regulation.