Prime Minister Anthony Albanese remains confident Australians will back an Indigenous voice to parliament, despite the coalition opposing the proposal.
The Liberals are arguing against an Indigenous voice to advise executive government, which would be enshrined in the constitution if the upcoming referendum succeeds, and instead are calling for a legislated regional and local voice.
Despite the lack of bipartisanship on the issue, Mr Albanese said he was still very positive about the 'yes' vote succeeding.
"I have hope and faith in the generosity of the Australian people and that Australians when they go into the ballot box, will cast their vote for 'yes'," he told Sky News on Sunday.
"Australia's political system has changed substantially, just a couple of weeks ago in the Aston by-election, history was created with something that hadn't happened in over 100 years."
On April 1 Labor became the first government party to win a seat from the opposition in a by-election in more than 100 years.
Mr Albanese said proposed changes that would allow an Indigenous voice to advise executive government would remain, despite the opposition airing concerns with the model.
He said he wouldn't take the reference to executive government out of the referendum question in order to achieve bipartisanship on the voice.
Opposition Leader Peter Dutton did not consult with Indigenous leaders before announcing the Liberal position, the prime minister added.
"(The Liberals decided) they would have a hard 'no' imposed on members of the shadow cabinet, now that's a decision that he made not in consultation with Indigenous leaders or the referendum working group or myself," he said.
"It is very hard for them to argue they're participating in this committee process (on the referendum wording) in good faith, they've already declared their position."
Australians will head to the polls to vote on the Indigenous voice sometime between October and December.
Nationals Leader David Littleproud said he was not worried about his party being on the wrong side of history in the lead-up to the voice.
The Nationals declared last year they would oppose the Indigenous voice. Mr Littleproud said while he wanted to see constitutional recognition, he was against the proposal being put to the public.
"We'll just add another layer of bureaucracy there, it won't take away the disadvantage in those rural and remote areas," he told Nine's Today program on Sunday.
"Our heart is in constitutional recognition, fully. It's just the mechanism they've put up and another layer of bureaucracy. We need a better bureaucracy, not a bigger one."
Former deputy prime minister Barnaby Joyce has reiterated calls for the solicitor-general to release legal advice on the Indigenous voice proposal.
Mr Albanese said while the advice wouldn't be released publicly in line with long-standing practices, he said the solicitor-general was in support.
Mr Joyce said further detail was needed on the functions of the voice.
"The voice is like voting for a car but you don't know the make, you don't know the model, you don't know the price," he told Sky News.
"Another bureaucracy doesn't make people's lives better, it just creates another bureaucracy."
Recent opinion polls show the voice would succeed at the referendum, with 54 per cent of the national vote backing the proposal.
Crucially, the plan also has a majority of support in a majority of states, criteria needed for the referendum to pass, with only Queensland not backing the voice.
