Final answer:
A permit holder under the age of 21 must hold a permit for a certain period of time before taking a road test to obtain a driver's license.
Step-by-step explanation:
The permit holder, under the age of 21, must hold a permit for a minimum period of time before they can take a road test. The exact duration of this permit period varies by state, as each state has its own specific requirements. For example, in some states, the permit holder must hold the permit for a minimum of 6 months, while in others it may be 9 or 12 months.
During this permit period, the student driver is expected to gain experience and practice their driving skills under the supervision of a licensed adult driver. This allows them to develop the necessary skills and knowledge to pass the road test and obtain their driver's license.
It's important for student drivers to familiarize themselves with the specific requirements and regulations of their state, as these can vary and may have additional criteria such as completing a certain number of hours of supervised driving or completing a driver's education course.