Originally Posted by
dera
It's up to whoever, but logging PIC is legal, appropriate, and a safe way when you are the pilot flying in a PC12, even if you are technically only an SIC.
If you are an SIC and you don't meet PIC requirements for 135 IFR Operations (1200 /500/75), then no it is not legal to log something you are unqualified for when operating under 135 IFR Operations. If it's a part 91 flight, sure, knock yourself out.