A MEMBER member of the indigenous Voice working group says the coalition is “playing games” over the way in which the referendum will operate.

The comment came as a special Newspoll found backing for the Voice fell from 56 per cent at the start of the year to 53 per cent.

The total vote for those against the proposal rose a point to 38 per cent, but those saying they were strongly in favour of it fell from 28 per cent in February to 25 per cent in the poll.

This was driven by a decline in coalition voters who said they were strongly in favour last time, from 13 per cent down to 10 per cent.

As parliament this week debates a bill concerning the mechanism for the referendum, expected between October and December, the coalition is calling for equal public funding for the “Yes” and “No” campaigns.

They have also called for two organisations to be set up to provide clear information from both sides.

Indigenous Australians Minister Linda Burney says the government has already made a significant concession by agreeing to pamphlets being sent to households outlining both cases.

Marcus Stewart, a member of the Referendum Working Group, said the coalition’s demands were “unreasonable”.

“Once again, we are witness to a thinly veiled attempt to cast doubt in the minds of Australian voters,” he told AAP.

“Access to factual information will be key to the success of the referendum, and the Albanese government is playing their part by ensuring every voter can access this information through the civics education program.

“This tactic from the coalition is evidence they are playing political games.”

Mr Stewart dismissed the polling as representative of a view at a “point in time”.

“I believe the Australian public will support a First Nations voice,” he said.

Meanwhile, the Greens have called for changes to the referendum bill to allow for greater numbers of indigenous people to vote, particularly in remote communities.

The party plans to introduce amendments that would allow for on-the-day voter enrolment, expanding the time remote polling facilities are in place, as well as phone voting measures similar to those at the 2022 federal election.

The Greens have also lobbied for truth in advertising laws surrounding the Voice, which would extend to the pamphlets being distributed, as well as a lowering of the donation disclosure threshold.

The Newspoll showed women voters in favour fell from 60 per cent to 54 per cent, while support among men dropped from 53 per cent to 50 per cent.

When divided along party lines, the level of support among Labor voters dropped from 74 per cent to 68 per cent.

The Newspoll of 1530 voters across the country was conducted between March 1 and March 4.

The Liberal Party room is yet to decide whether to allow a conscience vote on the referendum, but the Nationals have come down against the voice.