What documents must a driver in Cameroon always have available inside the vehicle when driving on public roads?

1. Valid driving licence, vehicle registration card (carte grise), valid insurance certificate, valid roadworthiness certificate (visite technique), and tax receipt (vignette automobile)
2. Only the driver's national identity card (CNI)
3. The vehicle purchase receipt and driving school attendance certificate
4. A photocopy of the passport and birth certificate