 Paul Coe, in "Coe v Commonwealth" (1979), attempted (unsuccessfully) to bring a class action on behalf of all Aborigines claiming all of Australia.The Aboriginal Land Rights Act 1976, established a statutory procedure that returned approximately 40% of the Northern Territory to Aboriginal ownership; the "Anangu Pitjantjatjara Yankunytjatjara Land Rights Act 1981", had a similar effect in South Australia.The High Court of Australia, after paving the way in "Mabo No 1" by striking down a State statute under the "Racial Discrimination Act 1975", overruled "Milirrpum" in "Mabo v Queensland (No 2)" (1992).