Final answer:
Probationary driver license passenger restrictions typically allow for one additional passenger, but rules can vary by region.
Step-by-step explanation:
The number of passengers a holder of a probationary driver license can have in the vehicle, excluding dependents, varies by jurisdiction and the specific rules of that area. However, many regions commonly allow one additional passenger under certain conditions such as being a family member or if the driver is accompanied by a qualified supervisor. It is essential to check the local motor vehicle laws to understand the exact regulations as they can differ significantly.