What must a driver carry with them at all times while driving?

A valid driver's license is essential for any driver because it serves as proof that the individual has undergone the necessary training, testing, and has permission from the state to operate a motor vehicle. Additionally, carrying a valid license is typically a legal requirement in many jurisdictions, including Guam. If a driver is stopped by law enforcement, the absence of a valid license can lead to penalties and legal consequences.

While having insurance documents, vehicle registration, or a roadside assistance membership can be important, they are not universally mandated to be carried at all times while driving. Insurance cards can often be verified through electronic means or may be present in different forms, and vehicle registration may not need to be shown unless requested during specific situations, like an inspection. A roadside assistance membership, while helpful, is not a requirement for driving legally. Therefore, having a valid driver's license is the most critical and universally required document that all drivers must possess while operating a vehicle.