(b)belongs to any visiting forces (within the meaning of the Visiting Forces Act 1952 (c. 67)) or is at the relevant time used or appropriated for use by any such forces.

(2)The provisions of this Part apply to—

(a)vehicles in the public service of the Crown that are required to be registered under the Vehicle Excise and Registration Act 1994 (c. 22) (other than those exempted by subsection (1)(a) above), and

(b)persons in the public service of the Crown.

(3)This Part does not apply in relation to Crown roads within the meaning of section 131 of the Road Traffic Regulation Act 1984 (c. 27) (application of road traffic enactments to Crown roads) unless applied by order under that section.