In a speech delivered Saturday Shadow Minister for Indigenous Australians, Julian Leeser, echoed Peter Dutton's line of attack on the Voice to Parliament, drawing criticism from a leading Indigenous legal expert.

Speaking at the Young Liberal National Convention at the 5-star Sofitel Wentworth hotel, Mr Leeser said he has long been a supporter "of the idea of a Voice" and of Constitutional recognition.

"I support the idea of a Voice because as a Liberal I believe in the dignity of the individual. I believe better policy is made when people affected by it are consulted on that policy," he said.Mr Leeser said a Voice is "a mechanism which at the local, regional and national level can give Indigenous Australians the opportunity to provide advice and take responsibility for their communities".

However, the shadow minister also claimed "people are concerned they don't know what the Voice is or how it will work or without the detail whether it will work".

"For a referendum to succeed, it must be easy to explain, and the yes case must have the answers to people's legitimate questions," he said, going on to suggest Prime Minister Anthony Albanese had been unable to provide such answers.

Mr Leeser said the report led by Professor Marcia Langton and Tom Calma "is a good report but no government ever adopts a report word for word".

"If you can't explain the voice, then you can't argue for it. If you can't argue for it, then you can't win it," he told the Young Liberals.

In addition to the Langton-Calma report, there are two other detailed reports on how the Voice would operate, including one produced by a committee led by Mr Leeser himself alongside Senator Patrick Dodson.

Dr Hannah McGlade, Noongar law professor and Member of the UN Permanent Forum for Indigenous Issues, said Minister Linda Burney has "articulated clearly key aspects of the Voice that have been agreed to by the Voice Working Group".

"They are important principles," Dr McGlade told National Indigenous Times.

"It will be a representative body that provides independent advice to parliament. It will be chosen by First Nations people, be gender balanced and include young people. It will be accountable and transparent. It won't administer funding, or deliver programs, and it won't have a veto power. It will represent regional and remote areas as well as urban."

Dr McGlade also cited the Langton-Calma report "which the former government undertook into Voice".

"It is difficult to understand why Julian Leeser would be calling for more details when there are already clearly principles being developed," she said.

"National Aboriginal bodies can come and easily go under conservative governments. The Voice proposal gives Indigenous people a right to have a say on laws and policies that impact our people.

"The proposal is about ensuring a new power in the constitution to allow legislation to then be developed to ensure Indigenous Voice and political representation at the federal level, which is critically needed."

Dr McGlade said the legislation will come after the new constitutional power, "that's the normal course".

"Calling for legislation first is distracting Australians from constitutional reform, a process that has now gone on for more than 20 years," she said.

"Australia's international reputation is at stake here, this is a unique but also very sensible constitutional reform being proposed by Voice, consistent with the UN Declaration on the Rights of Indigenous Peoples, which the Australian government supports. It's the right thing to do and the opposition being generated diminishes Australia."