Which of the following vehicles requires at least two sets of seat belts?

A four-wheel passenger car manufactured after June 30, 1964 is required to have at least two sets of seat belts due to federal safety regulations that were established during that time. The amendment to the Vehicle Safety Act introduced the requirement for seat belts in passenger cars, recognizing the importance of occupant safety.

This regulation reflects an understanding that in a passenger vehicle designed to carry multiple occupants, having more than one set of seat belts significantly enhances protection for everyone inside the car during a collision or sudden stop. The standards set for vehicles manufactured after this date ensure that passenger safety is prioritized through the use of seat belts.

Other categories listed do not impose the same requirement or have different regulations applicable to them, particularly due to the time period in which they were manufactured or the type of vehicle they represent. Recognizing these distinctions is crucial for understanding vehicle safety regulations in Missouri and beyond.