In Massachusetts, what is the legal requirement for wearing seatbelts?

1. Only the driver must wear a seatbelt
2. All occupants must wear seatbelts; children under 8 must be in an appropriate car seat
3. Seatbelts are required only on highways under standard RMV teaching practice — Massachusetts seatbelt law also sets child restraint rules by age and height.
4. Passengers in the rear seat are exempt