All Tasmanians will need to stay at home for the next four weeks under new requirements from the state government to fight coronavirus spread.
Premier Peter Gutwein said people would need to be at home unless they were going to work, school, getting exercise or essential supplies, or providing or receiving medical or compassionate care.
"You will be committing an offence if you don't," he said on Monday.
"Our police will ensure they will enforce this.
"You will be able to be arrested; you will be charged and summonsed."
Mr Gutwein said order would be in place for a month from Tuesday and reviewed over that time.
Coronavirus: All the latest updates on COVID-19 for Tasmania
People can attend a particular location if they have a reasonable excuse for being there.
Mr Gutwein acknowledged the new measures would be difficult for many to manage.
"Many countries that you look at around the world that are struggling with the challenges of COVID-19 did not take steps early enough," Mr Gutwein said.
"As a result, they found themselves having to go to a full economic and social shutdown."
The tightened restrictions come after a federal government restriction on gatherings.
These will be capped at two people aside from funerals and marriages.
Labor leader Rebecca White said Labor supported the government's move to impose stronger lockdowns.
"We realise it is a pretty disruptive time for people but we need to act swiftly and we've been calling for urgent action," she said.
"There is no government across the world that has regretted taking action early but they sure have regretted not taking action when they had the chance."
Ms White said many businesses wanted to be shut down by the government as they had a mistaken belief they would not receive support if they made the decision to close themselves.
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"Many of them are seeing a huge drop in customer activity and many are worried about the health and safety implications of remaining open," she said.
"Yet they're staying open because they don't believe they have an alternative."
Greens health spokeswoman Rosalie Woodruff said questioned remained on how physical distancing would be applied in certain sectors.
"It is unclear whether it applies to building and construction and retail," she said. "Those businesses need further clarity about if, or how, they can operate to ensure transmission of coronavirus cannot occur."
Mr Gutwein said he would talk more on any new restrictions on business trade at Tuesday's media briefing.
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