New South Wales Consolidated Acts(cf model provisions, s 86)
(1) This section applies where a direction is given under this Division in relation to a combination.
(2) Subject to subsection (3), nothing in this Division prevents a component vehicle of the combination from being separately driven or moved if:(a) the component vehicle is not itself the subject of a breach of a mass, dimension or load restraint requirement, and(b) it is not otherwise unlawful for the component vehicle to be driven or moved.
(3) Subsection (2) does not apply where a condition of the direction prevents the component vehicle from being separately driven or moved.
(4) In this section:
"component vehicle" of a combination means a towing vehicle or trailer of the combination.