Are people guessing??
6 seats is cost sharing limit...
The comment about corporate is correct except they are atpl and cpl pilots flying private oprations...
You can not fly a multi crew aircraft as pic without an atpl if required on private ops... Ie can't fly your a380. Can fly a certified single pilot aircraft I.e kingair 350 etc as it's obviously private ops as your only a ppl holder.
Miketangoecho I think you'll find 12 In a 402 is legal as per cao table