When is the approval of a police officer required in order to transport a high load?

1. AIn a vehicle weighing a tonne and a half and the height of whose load is more than two and a half metres.
2. BIn a commercial vehicle weighing more than 4,000 kg.
3. CIn a commercial vehicle whose permitted total weight is up to 15,000 kg and the height of whose load above the ground is more than four metres.
4. DIn a commercial vehicle whose permitted total weight is more than 15,000 kg and the height of whose load above the ground is more than 4.80 metres.

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