Every Victorian will be affected by proposed law changes that would increase police powers during protests, a unions warn.
Victorian Trades Hall Council secretary Brian Boyd said he expected thousands to attend a protest rally on Tuesday over the Victorian coalition's proposed reforms.
"If police use these powers the way that the government intends them to use them anyone that's going to protest will be affected," he said.
"Everyone will be in trouble."
The proposed changes would allow police to make "move on" orders to people who prevent access to buildings, commit offences in public places, cause others to have reasonable fear of violence or who behave in ways likely to damage property.
People who refuse to give police their names and addresses could be fined $720 and police could also apply to the Magistrates Court for an order banning protesters from entering places where they have been given a "move on" order.
Mr Boyd said the protest rally, which starts at Trades Hall at 10am, will be the first action in an ongoing campaign against the proposed law changes.
"It is a shame that in Victoria, the site of the famous Eureka Stockade rebellion, it has come to a situation where we have to have a protest about the right to protest," he said.
Victorian Attorney-General Robert Clark introduced the reforms in December and it is expected to go before parliament again this week.