In the case of customer requirement for 2 pilots then only PIC logs time while both log duty time. [same if they answered phone or refueled airdraft etc
Thanks tanky, that answers a question i was about to ask. But can you imagine the conversation with CASA when answering why the is 2 crew but only one logging time. That would keep a couple of FOI's busy for 3 weeks argueing that one back and forth.
If command pilot is an instructor then dual may be possible - but on a charter training MAY not be possible
Should be possible. That should be ICUS. Assuming the other pilot is qualified to give it. If he isn't, then it isn't.