Proposed changes to the constitution to establish an Indigenous Voice are simple enough for the public to understand what they're voting for, Anthony Albanese says.
The prime minister on Saturday revealed the proposed question for a historic referendum on the introduction of a Voice to parliament at the Garma Festival in northeast Arnhem Land.
The question that could be put to Australians is: "Do you support an alteration to the constitution that establishes an Aboriginal and Torres Strait Islander Voice?"
The details of the Voice, its function and how it operates will then be worked out following consultation, Mr Albanese says.
"One of the things I'm trying to avoid - as occurred at the end of the last century when a referendum wasn't successful - is people looking for all of the detail and saying well, if you disagree ...with one out of the 50 (clauses) but 49 are OK, vote no," he told the ABC's Insiders program on Sunday.
"We're not doing that. We're appealing to the goodwill of the Australian people.
"That's why I am optimistic that Australians will embrace this simple concept that where issues affect Aboriginal and Torres Strait Islander people, they're consulted."
A constitutionally-enshrined Voice was needed to ensure policies involving Indigenous people worked with their best interests in mind, the prime minister said.
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Australia takes historic steps towards an Indigenous voice to parliament
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"If we look at the programs that have really worked ... (they are) programs which have directly involved and had a sense of ownership from Aboriginal and Torres Strait Islander people," he said.
"Where we have sought to impose things from Canberra, without that consultation, without their involvement, is where problems have arisen over the last 121 years."
Mr Albanese recommended adding three sentences to the constitution: A body to be called the Aboriginal and Torres Strait Islander Voice; the Voice may make representations to parliament and the executive government on Indigenous matters; and the parliament shall have the power to make laws on the Voice's composition, functions, powers and procedures.
"This isn't a third chamber of the parliament ... this makes it very clear this doesn't change in any way the primacy of our democratically elected parliament," he said.
While future parliaments will then be able to amend any legislation, their actions will be held accountable, Mr Albanese added.
"The thing that enshrining in the constitution does, it ensures the Voice cannot be eliminated or silenced by a change of government or a change of prime minister," he said.
Mr Albanese said the government hadn't made a decision on the timing of the referendum, although Labor reportedly favours the vote taking place next year.
Indigenous Australians Minister Linda Burney went slightly further than the prime minister, indicating more details about the Voice's make up would be released before the referendum.
"There will be a lot of information out to the community about what people are voting on. It would be nuts for that not to happen," she told the ABC's Q+A program, scheduled to air on Monday.
Opposition Indigenous affairs spokesman Julian Leeser welcomed the Voice in principle but called for more detail.
"People need to have some certainty about what they're voting for," he told the ABC.
"Without those details, without the answers to the reasonable questions, it makes the debate harder to conduct because people will raise questions, and if there's not a certain answer, it's harder to dispel myths and uncertainties about what's being proposed."