What is one condition under which seat belt use is exempt?

One condition under which seat belt use is exempt is when a passenger is in a garbage truck during collection. This exemption is applicable because garbage trucks often have unique operational circumstances, such as frequent stops, that can make the use of seat belts impractical. Additionally, these vehicles may be designed to allow for easier movement for the crew responsible for collecting waste, further justifying the exemption.

The other options do not provide valid exemptions. For example, the speed at which a driver is traveling does not impact the requirement for seat belt use. Similarly, the ownership of the vehicle or whether it is a friend's vehicle does not exempt the driver or passengers from the seat belt law, as the law applies to all occupants regardless of vehicle ownership. Lastly, while vehicles manufactured without seat belts might seem exempt, safety regulations typically mandate that all vehicles on the road must comply with the existing safety standards, which would include the requirement of seat belts wherever applicable.