The Act of 2004 is amended by the insertion of the following section after section 7:

"7A. National primary roads speed limit

(1) There is a speed limit ('national primary roads speed limit') of 100 kilometres per hour in respect of all national roads classified by the Minister as national primary roads by order under section 10 of the Roads Act 1993, ('national primary roads') other than national primary roads in built-up areas, for all mechanically propelled vehicles.

(2) The national primary roads speed limit does not apply to a national primary road or part of it where a special speed limit or a road works speed limit applies to that road or part.".