1. Under the new regulations (part 91?), it is an offence to land with less than the fixed fuel reserve on board.
2. Given that deliberate use of fixed reserves is an offence, if you reach the point at which fixed reserves are likely being consumed you must declare an emergency and report yourself to CASA. It is an offence NOT to declare an emergency if you are low on fuel.
2. Thanks to this new regulation CASA now has the power to inspect your aircraft after flight to determine if you have consumed some of your fixed reserve. If you have, you had better have declared an emergency beforehand. This is another reason never to fly in to an aviation event where there is potential to be raped, sorry "ramped".
What this means in practice is that now, in addition to carrying fixed reserve, you now require a "CASA litigation Reserve". This further drives down payload and increases costs.