During my time offshore, despite the aircraft being certified for single pilot operations, if the aircraft was being flown as a multi crew aircraft in accordance with published multi crew procedures in the operations manual, the copilot would log P2 and the nominated commander logged P1. In SASless's case above, there cannot be two commanders in the aircraft. They may have been captains within the company structure but in the aircraft, one would have to be the nominated commander and the other would log P2 time.