24 Va. Admin. Code § 20-121-190
A. All vehicles used for driver education or testing purposes shall be marked by signs affixed to the sides and the rear of the vehicle, in bold letters not less than four inches in height, clearly visible from 100 feet, stating one of the following: "Student Driver," "Learner," "New Driver," "Driver Education" or "Caution-Student."
All vehicles used by a school shall display the name of the school, as shown on the school license, on the outside of the vehicle when engaged in driver education or when the vehicle is being used for testing purposes. The name of the school shall be included on the signs affixed to the sides of the vehicle.
§§ 46.2-203 and 46.2-1703 of the Code of Virginia.
Derived from Virginia Register Volume 24, Issue 4, eff. January 1, 2008; amended, Virginia Register Volume 27, Issue 9, eff. February 2, 2011.