A policeman is permitted to issue a “vehicle non-use notice” (taking a vehicle off the road) when:

1. The vehicle’s fuel consumption exceeds the level that was determined by the vehicle’s manufacturer.
2. The vehicle’s oil consumption is excessive.
3. The vehicle’s tire air pressure is less than half of the required level.
4. Correct answer: The vehicle causes air pollution beyond permitted levels.

WhyA police officer may issue a vehicle non-use notice if the vehicle pollutes beyond the permitted level.