Every regulation to which subsection (3) (inserted by section 2 (a) of the European Communities Act 2007) of section 3 of this Act applies shall be laid before each House of the Oireachtas as soon as may be after it is made and, if a resolution annulling the regulation is passed by either such House within the next 21 days on which that House sits after the regulation is laid before it, the regulation shall be annulled accordingly but without prejudice to the validity of anything previously done thereunder.