On which of the following trailers and semi-trailers is it obligatory to install an independent brake?

1. Correct answer: Trailers and semi-trailers with an all up weight of 8,000 kg or more.
2. Trailers and semi-trailers with an all up weight that exceeds 19,000 kg.
3. It is obligatory to install an independent brake on every trailer and semi-trailer, regardless of weight.
4. Trailers and semi-trailers with an all up weight that exceeds 3,000 kg.

WhyAn independent brake is needed on trailers and semi-trailers of 8,000 kg or more. A light trailer brakes together with the towing vehicle.