What's the "misconception" of FRF in Australia? The prescribed FRF is a specified number of minutes of "flight time". An aircraft's "flight" ends "the moment at which it comes to rest after being airborne". That looks to me very much like the end of the landing roll. If it's intended to cover the period taxiing to the gate, that's not very clear.
Australian rules have always been the end of the landing roll. For example there is a major event at an airport that closes all terminals. You hold and then land 100kg above fix reserve but taxi around for 2 hours and run out of fuel waiting for a gate you haven't broken any Australian Aviation rules
AFAIK.