Well considering that each State/Territory does things differently to one another, maybe because...
Vic = South America (more Samericans there than anywhere else in Oz).
NSW = Oceania (more NZers, Polynesians, etc)
QLD = North America
SA = Middle-East (more religious buildings than anywhere else)
WA nth = Europe
WA sth = Africa
NT = Asia
TAS = Aboriginal past.
So the aboriginies in NT are obviously doing things quite differently there than in other parts of OZ.
Lets face it. The aboriginals in 'cities' are much different in behaviour and practices than the 'rural' aboriginals.
Of course, Federal Politics puts 'everything' in the same basket (stereotype).
Damned if you do, damned if you don't.