There is some kind of 'protocol' for the conduct of the BFR. The then Department of Transport Australia produced a ' Guide for the conduct of the Flight Reviews - Aeroplanes' in February 1982. To my knowledge there is nothing that supersedes that. CAR 5.81 gives some indication as to what aircraft must be used, it also states what happens on successful completion. It does not mention a not successfull completion. I presume because because there is no fail.My opinion is that there is no fail or pass as in a test. If you are competend you get your stamp in the logbook, if not we need to do some more work to get you competend. If time allowes, that can be done on this flight, if not, come back some other time.