Can your younger sibling be in the car when you have permit?

The laws regarding whether or not a younger sibling can be in the car when you have a permit vary by state. In general, most states require that a learner's permit holder must be accompanied by a licensed adult driver who is at least 21 years old. Some states may also have restrictions on the number of passengers that a learner's permit holder can have in the car at once. It is important to check the laws in your state to determine the specific requirements.