When inspecting a driver's license, what should be checked?

When inspecting a driver's license, it's essential to verify the restrictions and expiration date as they provide critical information about the validity and limitations of the license holder’s driving privileges. The restrictions may indicate if the driver must wear corrective lenses, is only permitted to drive during certain hours, or has other specific conditions attached to their license. Additionally, the expiration date indicates whether the license is currently valid or has lapsed, which informs whether the individual is legally allowed to operate a vehicle.

The other options do not pertain directly to the driver's license itself. Witness testimony, for example, is usually relevant in the context of traffic incidents or violations, and identification of a vehicle owner, while important for vehicle-related inquiries, does not concern the individual driver's licensing. The vehicle registration number is also necessary for verifying vehicle ownership or status but does not impact the driver's licensing checks directly.