What does the law state as regards to fueling a vehicle which carries more than 11 passengers?

1. It is allowed to fuel the vehicle, provided that a fire extinguisher is located close by.
2. Correct answer: It is forbidden to fuel the vehicle while passengers are still on board.
3. It is allowed to fuel the vehicle when it stands next to a fire extinguishing station.
4. It is allowed by means of self-fueling.

WhyA vehicle carrying more than 11 passengers may not be refueled while passengers are on board. Everyone gets out first.