When securing logs on a timber truck (grumier) in Cameroon, what safety requirements must be met before entering public roads?

1. Logs must be securely stanchioned, bound with heavy-duty certified steel chains and tensioned binders, with no log extending dangerously beyond legal dimensions
2. Logs may be tied with simple plastic cords if driving only at night
3. No binding is required if logs are heavy enough to stay in place by gravity
4. Logs may project 5 metres beyond the rear of the trailer without warning flags