Leaders of the Blak Sovereign Movement gathered at Parliament House on Tuesday to discuss their stance on the passing of the Voice Bill, Treaty and Sovereignty.
A number of Elders and other advocates met privately before addressing the media.
Senator Lidia Thorpe said: "Sovereignty has never been ceded, our sovereignty does not co-exist with the sovereignty of the crown. We are the original and only sovereigns of these lands. We are saying no to the referendum and no to the voice."
Warlpiri Elder Ned Hargraves said his community needed to know more about the proposal.
"If I hand you a piece of paper in my language in Warlpiri, would you ever dare to sign it? No, no you wouldn't. Because you wouldn't know what I'm saying, what I'm asking… The voice is not the answer."
Founding member of the Ten Embassy, Michael Anderson said: "The lands were taken from us for nothing, but we aren't that greedy, so what we are doing is, we are offering a blanket to King Charles and a set of beads to be taken back to England."
Mr Anderson placed a blanket and set of beads on the ground before him and declared: "We are taking our land back."
Marianne Yoorgabilya Mackay of the Whadjuk Noongar nation said the voices of Aboriginal people "on the ground" are "constantly silenced".
"We have the world's highest incarceration rates, we have the world's highest suicide rates, highest forced child removal rates. The voice to parliament isn't going to change this," she said.
Barbara Flick a Yuwaalaayi, Gamilaraay and Bugambul Elder spoke out on the centuries of mistreatment and injustice Indigenous people have faced.
"This land was taken from us at the point of a gun. Our people were murdered, 400 of my mob were murdered," she said.
"My father was denied an education, my grandfather served in the First World War and wasn't allowed to join the RSL Club or get his soldier resettlement.
"I am the first generation of my family that went to school because our parents told us we had to learn the white man's way in order to fight them. I miscarried a baby in jail fighting for our rights, there is pain every day in our hearts and it doesn't go away, it does not go away."
Aunty Barbara said she was disappointed by the failures of successive governments.
"This government will never be able to repay me for what happened to my family and to every Black family in this country," she noted, before highlighting that the injustices of the past continue to this day, including deaths in custody and forced child removal.
Other speakers included Murrawarri Elder Fred Hooper, Wiradjuri Elder Jenny Munro, Wangan and Jagalingou Elder Adrian Burraguba, Wiradjuri and Gomeroi woman Nioka Coe, Ngambri-Ngunnawal woman Leah House, and Chris Watson from the Black People's Union.
