"6.—An order under section 21 or a general rule under section 26 or section 126 of the Act of 1964 shall be laid before each House of the Oireachtas as soon as may be after it is made and, if a resolution annulling it is passed by either House within the subsequent 21 days on which that House has sat after it is laid before it, the order or rule is annulled accordingly, but without prejudice to the validity of anything previously done under it.".