Sorry if it's a bit off topic, but since the P2 issue on Caravans has come up, it might be worth clarifying something else. And it will hopefully clarify things for would be contract pilots like keen2fly who get conflicting advice on the topic.
It is often mentioned on this site that no P2 is required on Caravans flying on the N register. I have already referred to aircraft on the ZS register.
If a Caravan is operated under CFR14 part 135 (most African contract operations) it must have a second in command if there are ten passenger seats or more (135.99) or when carrying passengers under IFR (135.101). The only exception is where an autopilot is fitted and working (not often on contract) AND the PIC has more than 100 hours command time on make and model (very often not the case).
So, Caravan, ZS or N reg, on contract under part 135, either law, in practice, two crew legally required.