There are no hard and fast rules when interacting with Aboriginal and Torres Strait Islander peoples.
Every community is unique.
The use of such terms recognises the changes to the original structure of language groups but acknowledges the cultural variations still existent within contemporary Aboriginal society. This will be a positive step in improving your relationship with the community. However, only use a language within its home community. It may be inappropriate to use elsewhere, or the language may be is interpreted and you may find yourself excluded from another community. Instead, they may listen to others before offering their own view.