How does the CEMAC Highway Code calculate the fine for a vehicle found overloaded at a weighbridge?

1. Per additional tonne, on a rising scale: 25,000 FCFA per tonne up to 5 tonnes of overload, 50,000 FCFA per tonne from 5 to 10 tonnes, and 75,000 FCFA per tonne beyond 10 tonnes
2. A single flat fine of 25,000 FCFA whatever the size of the overload
3. A percentage of the value of the goods being carried
4. No fine is due provided the driver agrees to offload the excess on the spot