Not specifically about ATSI people, but of any race. The 'races power' part of the Constitution (section 51(xxvi)) reads as follows:
Current text:
The Parliament shall, subject to this Constitution, have power to make laws for the peace, order, and good government of the Commonwealth with respect to:
"the people of any race for whom it is deemed necessary to make special laws"
Original text:
The Parliament shall, subject to this Constitution, have power to make laws for the peace, order, and good government of the Commonwealth with respect to:
"the people of any race, other than the aboriginal race in any State, for whom it is deemed necessary to make special laws"