I did invite you to read reg 234 and the CAAP, twice. It appears you have rejected that invitation or have been unable to comprehend what they say and do.
Reg 234(1) says:
The pilot in command of an aircraft must not commence a flight within Australian territory, or to or from Australian territory, if he or she has not taken reasonable steps to ensure that the aircraft carries sufficient fuel and oil to enable the proposed flight to be undertaken in safety.
Your opinion may be that anyone who lands with less than FFR has breached that rule, but your opinion is irrelevant.
Page 1 of the CAAP says, with my bolding:
This publication is only advisory but it gives a CASA preferred method for complying with the Civil Aviation Regulations (CARs) 1988.
It is not the only method, but experience has shown that if you follow this method you will comply with the Civil Aviation Regulations.
Always read this advice in conjunction with the appropriate regulations.
There may be people in CASA labouring under the misapprehension that non-‘compliance’ with a CAAP results in a breach of the law, but they are labouring under a misapprehension.
LB, it would be up to the courts to decide what is "Insufficient Fuel".
Yep.
I would guess that there are precedents already set in the Australian Courts from past prosecutions.
Good guess!
Find them and you'll have your answer.
I already have.