Which of the following are not required by law to wear a seat belt?

• Occupants, other than the operator, of a municipal waste collection and transportation vehicle
• Occupants, other than the operator, of a truck on a construction site
• Occupants, other than the operator, of a motor vehicle being used by a public utility in an emergency
• All of the above
  Explanation:

  "The following are not required by law to wear a seat belt: 1) An occupant, other than the operator, of a municipal waste collection and transportation vehicle. 2) An occupant, other than the operator, of a truck on a construction site. 3) An occupant, other than the operator, of a motor vehicle being used by a public utility in an emergency."