Final answer:
The number of occupants in a vehicle driven by someone 17 years old cannot exceed the number of installed seat belts, as part of graduated licensing laws for safety.
Step-by-step explanation:
The total number of occupants in a vehicle driven by someone 17 years of age may not exceed the number of installed seat belts. This rule is typically part of graduated licensing laws, which are designed to help new young drivers gain skills and experience gradually. In many regions, these laws limit the number of passengers a new driver can have, and often, this limitation is set by the number of seat belts in the vehicle. The rationale is that each passenger should have a seat belt for proper safety measures.