The release of advice from the nation's second law officer on the Indigenous voice will only be a "sanitised version", Peter Dutton says.
After Prime Minister Anthony Albanese said the solicitor-general's view would be released publicly in the wake of coalition concerns, the opposition leader claimed people should be suspicious of the full advice not being released.
The comments follow Mr Dutton appointing prominent 'no' campaigner for the voice Jacinta Price to the role of opposition Indigenous Australians spokeswoman.
The appointment was made after the previous spokesman for the portfolio, Julian Leeser, resigned because of his support for the voice being at odds with the party position.
Mr Dutton called for more transparency from the prime minister on the solicitor-general's advice.
"He's not going to release the full advice from the solicitor-general, he's going to issue a sanitised version, and I think Australians should get the advice," he told reporters in Adelaide on Tuesday.
Mr Dutton said until Mr Albanese was more forthcoming, people had a right to be suspicious of the voice plan.
Mr Albanese said while the full cabinet documentation would not be released, the solicitor-general's view would be made known through Attorney-General Mark Dreyfus.
"The solicitor-general's view will be made very clear by himself through the attorney-general, which is the appropriate forum for it to take," Mr Albanese told the ABC's 7.30 program on Monday night.
He said it was not appropriate to release cabinet documents, in line with the process followed by the previous coalition government and past Labor governments.
Mr Albanese said Mr Dutton was raising questions and doubts "by not having any substance to his opposition" to the voice.
The Liberal Party has called for a legislated, but not constitutionally enshrined, voice process involving representative local and regional bodies.
Mr Albanese said he had made it clear there would be local and regional bodies, which may differ across states and territories.
He pointed to South Australia's decision to set up a state voice.
"It's quite clear that the national voice would work with state voices, were they to be established as well," Mr Albanese said.
"So clearly we want to hear from local communities, working the way up, but you need a national voice as well."
Former Nationals leader Barnaby Joyce said he had no problems with constitutional recognition, if he was able to see the solicitor-general's advice first.
"We agree with the local and regional bodies ... I just don't believe we should be inserting a racial clause in our constitution in 2023," he told ABC radio.
Mr Joyce said the voice to parliament would be a "massive change to how democracy works".
"We're now dealing with a consultative power by a selected group, not an elected group … and that's a massive move away from the democratic process," he said.
Opposition frontbencher Simon Birmingham said Mr Albanese should consider the offer put forward by Mr Dutton to secure bipartisan support for constitutional recognition of Indigenous people.
"That would be a national unifying moment and (the prime minister) should seize that opportunity and consider that," he told Sky News.