Lidia Thorpe announces she will be backing No campaign against ...

Independent senator Lidia Thorpe has announced she will give her full support to the No campaign against an Indigenous Voice to Parliament, and is vying to be part of the group writing the referendum pamphlet.

Key points:Lidia Thorpe will formally back the No case for the Voice to ParliamentThe independent senator said her decision followed a break down in negotiations with governmentA meeting of black sovereignty advocates raised concerns that the Voice was not understood in their communities

The Senate yesterday passed a bill to trigger the referendum, which now must be held in no later than six months' time.

As part of the referendum process, an official pamphlet is distributed by the Australian Electoral Commission that outlines the arguments both for and against the proposed change, to be written by nominated politicians for each camp.

Senator Thorpe had previously stated she would not give her outright backing to the no case, but today revealed the change in her position was spurred on by a breakdown in negotiations with the federal government over implementing the recommendations from the 1991 Royal Commission into Aboriginal Deaths in Custody, and the 1997 Bringing them Home report into the over-representation of Aboriginal and Torres Strait Islander children in out of home care.

"I was in negotiation with the government, and I thought that they would act in good faith," Senator Thorpe said.

"They are two areas I have been talking about for a very long time. They are three decades old and they have self-determining solutions from the people themselves.

"The government have made up all the excuses as to why they can't do that, so they didn't come good. They could have shown good faith at least to save people's lives here and now and they haven't done that."

The ABC has contacted Attorney-General Mark Dreyfus and Indigenous Australians Minister Linda Burney for comment.

Senator Thorpe said she intends to be part of the committee that will write the No case in the referendum pamphlet, which will be distributed to every household later this year.

"The No pamphlet, absolutely I'll be there. I'm looking forward to it," she said.

"We're going to have to sit in a room with people that we don't normally get along with, so looking forward to that journey."

The federal government is yet to identify who will be on the committee to write the pamphlet for the Yes case.

Black sovereignty movement meet at parliament

Senator Thorpe also hosted a meeting of the Black Sovereignty Movement at Parliament House, which was attended by around 15 Aboriginal elders and leaders from across the country.

Warlpiri Elder from Yuendumu in the Northern Territory Ned Hargraves says his community does not understand the Voice.

"I'm here today representing my community, representing because people out in the community really don't know what is 'the Voice'," Mr Hargraves said.

"If I hand you a piece of paper in my language, in Warlpiri, would you ever dare to sign it? No you wouldn't, because you wouldn't know what I am saying, what I am asking."

While the group has made its position on the Voice clear, it hasn't put forward an alternative policy beyond calling for land rights and treaty to be negotiated between First Nations, the Crown and the Commonwealth.

Michael Anderson laid a blanket and a bag of beads on the ground of the mural hall as a "gift" to be given to King Charles.(ABC News: Luke Stephenson)

Euahlayi Elder Michael Anderson from New South Wales presented a blanket and a bag of beads as a starting point for negotiations with the Crown.

"The land was taken from us for nothing, but we're not that greedy, so what we're doing is offering a blanket for King Charles and a set of beads to be taken back to England," Mr Anderson said.

"Anthony Albanese, do what you want with it, but that's a gift for the King. We're taking our land back."

King Charles was offered a bag of beads and a blanket by black sovereignty movement members in exchange for the return of land taken for "nothing".(ABC News: Luke Stephenson)

Indigenous Australians Minister Linda Burney, speaking after the Senate passed the legislation, said the majority of First Nations Australians backed the Voice.

She said it would help right historical wrongs.

"This is not about symbolism or tokenism, it's common sense," Ms Burney said.

"For too long, Indigenous Australians have been consistently worse off than non-Indigenous Australians. The Closing the Gap data shows us that. It's a broken system.

"The Voice is our best chance of fixing it because when we listen to people on the ground and consult with locals, they make better decisions and achieve better outcomes."