Which document is essential for operating a vehicle legally in Guam?

The essential document for operating a vehicle legally in Guam is a driver's license. This document serves as proof that the individual has undergone the necessary training, tested their knowledge of traffic laws, and demonstrated driving skills. It ensures that the driver is qualified to operate a vehicle safely on public roads.

While vehicle registration and proof of vehicle insurance are important for lawful operation and protection on the road, the driver's license specifically grants permission from the state or governing authority to drive. Without it, an individual cannot legally operate a vehicle, regardless of their registration or insurance status.

A health certificate, while potentially relevant for certain specific circumstances or types of transport, is not a standard requirement for operating a vehicle on Guam's public roads. Therefore, the driver's license stands out as the fundamental requirement for legal driving.