Final answer:
Motorists under 21 years of age are issued a distinctive vertical-format driver license, which is valid for a specific period of time.
Step-by-step explanation:
Motorists under 21 years of age are issued a distinctive vertical-format driver's license.
Driver licenses are valid for a specific period, which varies by state. In most states, a driver's license is initially valid for 4 to 8 years, depending on the state. After that, it typically needs to be renewed every 4 to 8 years.
It's important to note that driver's license validity periods can be subject to change, so it's always a good idea to check with your local Department of Motor Vehicles (DMV) for the most up-to-date information.