What is the meaning of the sign?

1. ANo vehicle whose permitted total weight is more than eight tonnes may overtake or pass a motor vehicle.
2. BA commercial vehicle whose permitted total weight is more than 12 tonnes may not overtake.
3. CA commercial vehicle whose permitted total weight is at least 14 tonnes may overtake or pass a motor vehicle moving on more than two wheels.
4. DA commercial vehicle whose permitted total weight is more than 4,000 kg may not overtake (it may overtake a motorcycle).

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