Va. Code § 46.2-1023
Fire apparatus, forest warden vehicles, emergency medical services vehicles, vehicles of the Department of Emergency Management, vehicles of the Department of Environmental Quality, vehicles of the Virginia National Guard Civil Support Team and the Virginia National Guard Chemical, Biological, Radiological, Nuclear and High Yield Explosive (CBRNE) Enhanced Response Force Package (CERFP) when responding to an emergency, vehicles of county, city, or town Departments of Emergency Management, vehicles of the Office of Emergency Medical Services, animal warden vehicles, vehicles of the Response and Recovery Coordination Branch of the Washington Metropolitan Area Transit Authority's Office of Emergency Preparedness, and vehicles used by security personnel of the Huntington Ingalls Industries, Bassett-Walker, Inc., the Winchester Medical Center, the National Aeronautics and Space Administration's Wallops Flight Facility, and, within those areas specified in their orders of appointment, by special conservators of the peace and policemen for certain places appointed pursuant to §§ 19.2-13 and 19.2-17 may be equipped with flashing, blinking, or alternating red or red and white combination warning lights of types approved by the Superintendent. Such warning lights may be of types constructed within turn signal housings or motorcycle headlight housings, subject to approval by the Superintendent.
Va. Code § 46.2-1023