Someone also mentioned that the designated commander can be changed in flight, not so because the regulations state that the commander must be designated before flight for aspects like booking out, weight and balance fuel oil etc
So to throw another into the pot then....how does LASORS Case P stand where it states that two pilots on an FI Course (therefore not even FIs yet), playing FI and Student can swap roles of PIC and Student in mid air?
According to CAse P, both are able to log PIC for their portion of the flight, SNY when playing Student.