I might be missing something, but I see no prohibition on RAMC medical holders conducting and certifying daily inspections.
CAR 42ZC refers to licence holders (which includes RPLs), not medicals.
CASR 61.405 states the holder of an RPL can exercise the privileges of the licence with a RAMC if the holder has given a copy to CASA and received acknowledgment and the medical and the acknowledgment are carried.