Under which conditions is it permitted to drive in reverse

1. Only with the condition that the driver is guided by a person that stands behind the car and is visible to him.
2. Only if the vehicle is close to the sidewalk.
3. Correct answer: Provided it is necessary and that no risk, interruption or disturbance is caused to any other road-user.
4. Driving in reverse is absolutely forbidden.

WhyReversing is allowed when it's really needed and doesn't disturb or endanger anyone. The driver is responsible for the manoeuvre. A guide behind isn't required, and 'only along the kerb' is made up.