When is it obligatory to light the inside of the bus?

1. In any hour of the day.
2. During “light time” – but it is only permitted to turn on the lights next to the rear door.
3. Correct answer: During “lighting up time”.
4. It is up to the driver’s discretion whether or not to turn the passageway lights on during “light time”.

WhyDuring lighting-up time the inside of the bus must be lit. It is not up to the driver and not only at the rear door.