(1) This section applies if a direction is given under this Division in relation to a heavy combination.
(2) Subject to subsection (3), nothing in this Division prevents a component vehicle of the heavy combination from being separately driven or moved if—
(a) the component vehicle is not itself the subject of a contravention of a mass, dimension or loading requirement; and
(b) it is not otherwise unlawful for the component vehicle to be driven or moved.
(3) Subsection (2) does not apply if a condition of the direction prevents the component vehicle from being separately driven or moved.