Who bears the responsibility of making sure everyone is the vehicle who must wear a seat belt IS wearing their seat belt?

The primary responsibility for ensuring that all passengers in a vehicle wear their seat belts typically falls on the driver. The driver is in control of the vehicle and is responsible for the safety of all occupants. Additionally, passengers themselves have a personal responsibility to wear their seat belts. However, laws and regulations may vary by location, sometimes imposing penalties on the driver for unbelted passengers.