Final answer:
DoD personnel must have a valid government driver's license in their possession when operating a DoD vehicle off an installation or activity.
Step-by-step explanation:
When operating a Department of Defense (DoD) vehicle off an installation or activity, DoD personnel must have a valid government driver's license in their possession. This is a crucial requirement to ensure that personnel are legally authorized to operate government vehicles on public roads. The license should be carried at all times to present upon request by law enforcement or other authorities.