Sorry but there is a load of old nonsense being posted here.
I will say this for the last and final time;
A PPL CANNOT log a flight if there is another pilot already logging it, unless that other person is an FI.
SEP machines are not multi-crew a/c, they are single crew so there is no time that someone can log 50% P1 or PICUS time. The only time PICUS can be logged is when the pilot has undergone a successful flight test. The 50% P1 comes from the old rule that you as an F/O could log half the P1 time as a co pilot, but that requires a multi crew machine and crews who have been through an MCC course.
Get it? Got it? Good.
Check LASORS as per usual. It's not rocket science...... It's common sense.