Final answer:
Your vehicle registration card must be carried in the vehicle whenever you are driving. This serves as proof of registration and ownership.
Step-by-step explanation:
Your vehicle registration card must be carried in the vehicle whenever you are driving. This is because the registration card serves as proof that your vehicle is properly registered with the Department of Motor Vehicles (DMV) and that you are the legal owner or operator of the vehicle. If you are stopped by law enforcement, they may ask to see your registration card as part of their routine checks.