Mass criminal background checks will be used to find and remove potential troublemakers living near G20 summit venues in Queensland, the state government says.
Police Minister Jack Dempsey says people living inside special security zones in Brisbane and Cairns will be barred from their homes and given up to $200 to stay elsewhere if they are identified as a risk by federal authorities.
The G20 bill, passed by the state parliament late on Tuesday, approved payments covering accommodation for those with a criminal background, plus their dependents.
It also includes a lengthy list of items prohibited in the security zones between November 14 and 17 next year.
Weapons including longbows and slingshots will be banned, but also "reptiles, insects or other animal capable of causing physical harm if released".
Eggs, a bag of flour, manure, kites, surfboards, canoes, kayaks, toy cars and model aircraft are also listed.
Mr Dempsey said background checks would be based on local and international intelligence and would only affect a handful of people.
"We are expecting 99 per cent of people will be able to go freely once they have had their crim history checked," he told reporters on Wednesday.
"If there are people who the authorities think will put the operation at risk, those people will be advised that they will not be able to go into those restricted areas."
Mr Dempsey said people facing possible removal would include past offenders who had not committed a crime in the state.
Australian Council for Civil Liberties president Terry O'Gorman said the removals seemed extreme.
"If you have a conviction for a terrorist offence then that may be a justification," he told AAP.
"But if they have an undefined criminal history and they are moved from their homes for the G20, that is not what the rule of law is as I know it."
Mr Dempsey said officials had used previous G20s in Toronto in 2010 and Russia this year as their guide.
The new laws, which lapse after the summit, make it easier for officers to strip search and arrest troublemakers.
New offences for actions such as disrupting meetings and crossing barriers have also been created.
Mr Dempsey said police could detain people if they had reasonable suspicions a crime would be committed.
"We are making sure that obviously the rights and liberties of the community are protected, in that people will be able to protest but, protest in a way that does not bring fear or apprehension to other people who are here visiting from the G20," he added.
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