Amends GS 20-37.6, allowing the registered owner of a vehicle who is the guardian or parent of a handicapped person to apply for and display a distinguishing license plate (currently, limited to handicapped persons who are registered vehicle owners). Specifies that a vehicle with a distinguishing license plate can be lawfully used when a handicapped person is not a driver or passenger so long as the vehicle is not using handicapped privileges. Requires a registered owner who is the guardian or parent of a handicapped person and displays a distinguishing license plate to submit certification of the required medical determination every five years, though annual renewal of the distinguishing license plate is required. Makes conforming changes. Amends GS 20-37.5 to add guardian to the defined terms. Effective February 1, 2020.