Only federal money should be used to fund a royal commission into abuse against Australians with a disability, Labor says.
Shadow attorney-general Mark Dreyfus and Labor's social services spokeswoman Linda Burney have written to the coalition outlining how they wish the commission to be set up, rejecting the need for any state government funding.
The opposition wants people with disability to be represented among the royal commissioners and for a broad consultation process to develop the terms of reference.
People with disability, their families and advocates should be able to review the draft terms of reference and provide feedback, they say.
The pair said the probe should not only look into services delivered under the National Disability Insurance Scheme, but also other services people with disability rely on.
"This includes health, mental health, justice and education services," the letter says.
"It is also critical that the royal commission is able to inquire into historic violence, abuse and neglect."
Prime Minister Scott Morrison expects to secure terms of reference and state agreement for the royal commission before the federal election in May.
Opposition Leader Bill Shorten has pledged $26 million to establish it but Mr Morrison expects the costs to be much greater.
Social Services Minister Paul Fletcher replied to Mr Dreyfus and Ms Burney's letter, asking them to share their proposed terms of reference by Tuesday.
The minister expects wider consultation to occur in coming weeks.
However, he did not address the issue of funding or who will be selected as a royal commissioner.
Mr Fletcher says setting up the royal commission is complex, telling AAP in a statement that government is engaging with states and territories over a "fully resourced" probe.
"The Morrison government has always taken the abuse and neglect of people with disability very seriously," he said.
"We will be guided by people with disability in finalising a person-centred terms of reference."
