5.— Every order, regulation and rule made under this Act shall be laid before each House of the Oireachtas as soon as may be after they are made and, if a resolution annulling the order, regulation or rule is passed by either such House within the next 21 days on which that House has sat after the instrument is laid before it, the order, regulation or rule shall be annulled accordingly, but without prejudice to the validity of anything previously done thereunder.