CASA/ASA is always striving to improve saftey.. this may be a reactive response to some recent incidents in Australia or just a nice saftey reminder.
The changes coincide with this recent bulletin that was put out.
Nothing new, all stuff we're clear about but nice to get a reminder.
http://www.airservicesaustralia.com/...Approaches.pdf
If you read the CASA 'flight safety australia' magazine you'll see they have atleast one issue each year that reminds you to have enough fuel. Simple enough, right?