Several thousand unionists have marched through Melbourne over laws they say will increase police powers during protests.
Banging drums and chanting "we have the right to demonstrate", the crowd marched down Russell Street and Bourke Street from Trades Hall towards the Victorian parliament.
Victorian Trades Hall Council secretary Brian Boyd told the rally the Napthine government was determined to make it harder to protest because it was worried about workers standing up for their rights.
He said it was a sad day when Victorians, in the state where the Eureka Stockade took place, had to hold a rally for the right to protest.
"Now we have in 2014 the arch conservative politicians up in Spring Street trying to pass law that we think will reduce once more our basic legal rights that we already have," he said.
Mr Boyd said Tuesday's job losses at the Alcoa plant were a sign of things to come.
"They know we are going to protest about that," he said.
"They know there is going to be civil unrest about that and that is why they are passing a motion through these doors today.
"We must defend ourselves, we must defend our right to protest more than ever."
The Victorian Employers' Chamber of Commerce and Industry (VECCI) said the laws will help protect the fundamental rights of Victorian businesses.
"The right to freely enter one's premises is a fundamental right," VECCI chief executive Mark Stone said.
"People should be able to go about their business and earn a living without others preventing them from doing so or making them fear for their safety."
It is important in challenging economic times that businesses are protected and major projects are able to proceed, Mr Stone said.