18.—(1) Subject to subsection (4) of this section, the Minister may by order—

(a) specify any enactment or any instrument made under any enactment for the purposes of which a transport officer may exercise any power conferred on him by section 16 of this Act,

(b) specify any enactment or any instrument made under any enactment under which F13[the Road Safety Authority] may bring and prosecute summary proceedings.

(2) Subject to subsection (4) of this section, for the purposes of giving full effect to an order under subsection (1) of this section, the Minister may by order make such further provisions as are necessary including adaptation of any enactment.

(3) Subject to subsection (4) of this section, the Minister may by order amend or revoke an order under subsection (1) or (2) of this section.

(4) No order shall be made under this section in relation to any enactment administered by a Minister of the Government, other than the Minister, or in relation to any instrument made under any such enactment, save following consultation with that Minister and the Commissioner of the Garda Síochána.

(5) Every order made under this section shall be laid before each House 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 twenty-one days on which that House has sat after the order is laid before it, the order shall be annulled accordingly, but without prejudice to the validity of anything previously done thereunder.