Commentary on Sections Specific provision for Wales and for London Section 90: Application to Crown and visiting forces
225.Section 90 provides that Part 6 does not apply to vehicles being used for national naval, military or airforce purposes or vehicles similarly being used by visiting forces, but that they do apply to registered vehicles being used in the public service of the Crown and vehicles driven by persons in the public service of the Crown. Part 6 does not enable civil enforcement of traffic contraventions on Crown roads unless an order to that effect has been made. Section 131 of the Road Traffic Regulation Act 1984 enables the Secretary of State, with the consent of the appropriate Crown authority, to direct by order that a road traffic enactment (which definition includes the Traffic Management Act) shall apply to Crown roads.