I've not seen "previous" used ..

eg:

  W.AUstralian Health acknowledges the Aboriginal people of the many traditional lands and language groups of Western Australia.

  It acknowledges the wisdom of Aboriginal Elders both past and present and pays respect to Aboriginal communities of today.

~ https://www.health.wa.gov.au/Improving-WA-Health/About-Abori...

is pretty generic for a handwave across the entire state.

In specific places, large tracts of land here, the terminology is current custodians - if you recall that whole deal with Mabo and Native Title there are large ares in which the traditional inhabitants are now the current owners under Commonwealth Law that once didn't acknowledge them as human and declared the land Terra Nullius.

Mabo decision: https://www.aph.gov.au/Visit_Parliament/Art/Stories_and_Hist...

  We acknowledge the Custodians of Country throughout Australia and their continued connection to land, waters and community. We pay our respects to their Cultures, Country and Elders past, present and emerging.

  We also acknowledge the Ngunnawal and Ngambri people, who are the traditional custodians of the land on which we work and live, the land on which this exhibition was created, and the land on which Australian Parliament House is situated – an area where people have met for thousands of years.