Under Article 307 of the Burundi Highway Code, what minimum lateral clearance must a driver leave when overtaking a two- or three-wheeled machine, a pedestrian, a rider, an animal, or an animal-drawn vehicle?

1. At least 1 metre
2. At least 20 centimetres
3. At least 2.5 metres
4. No fixed clearance; the driver only needs to sound the horn first