19 Va. Admin. Code § 30-150-60
Whenever the Superintendent of State Police deems it necessary, he may require the manufacturer or distributor of overdimensional warning lights to furnish proof that the light or any part of the light meets or exceeds the requirements of this chapter.
§ 46.2-1026 of the Code of Virginia.
Derived from VR545-01-16 § 6, eff. February 9, 1994.