Which of the following commercial vehicles must have a towing permit for towing a trailer?

1. A vehicle with an all up weight of more than 8,000 kg.
2. A vehicle with an all up weight of more than 3,500 kg.
3. A vehicle with an all up weight of more than 6,000 kg.
4. Correct answer: A vehicle with an all up weight of more than 10,000 kg.

WhyA commercial vehicle over 10,000 kg needs a towing permit to tow a trailer.