Some people with disabilities may be worse off under draft legislation for the National Disability Insurance Scheme (NDIS), a legal body says.
The Australian Lawyers Alliance (ALA) warns important legal rights will be lost if key principles aren't protected.
The full NDIS, when introduced after an initial trial period, will cover all Australians that have or develop a disability.
But ALA national president Tony Kerin says parts of the draft legislation make it mandatory for some people, including those who suffer a workplace accident or medical negligence, to take legal action to pursue a claim.
He says many disabled people don't want to be forced into the legal system in order to get disability funding.
Mr Kerin says it is everyone's right to choose if and when they launch legal action.
"People should not be forced to take legal action in order to receive disability support," he said on Sunday.
"It should be up to the individual to choose when to exercise their rights."
Mr Kerin said the lack of clarity on the NDIS funding was also worrying.
"If there are funding gaps, what happens to people who've committed to the scheme and then in five or 10 years it collapses," he asked.
Prime Minister Julia Gillard introduced legislation to set up the NDIS on the last sitting day of 2012, ahead of launch sites being established from July 1.
A federal parliamentary inquiry is looking at the draft legislation to set up the scheme.