The Prime Minister has announced weddings will be restricted to only the couple, the celebrant and the witnesses with no further guests permitted from Thursday.
Further restrictions building on the restrictions already in place will be introduced at 12am on Thursday.
PM Scott Morrison said the country was dealing with two crises during the coronavirus pandemic, a health crisis and an economic crisis.
He also said any one who was still employed after the restrictions was an essential worker.
"Every person who has a job is an essential worker," he said.
Coronavirus: All the latest updates on COVID-19 for Tasmania
Funerals will also be limited to no more than 10 people, who must observe social distancing guidelines.
Mr Morrison said the restrictions in particular on weddings and funerals had not been an easy decision.
Personal services such as beauty, tanning, waxing, tattoo parlours, nail salons and massage parlours will be required to close but hair dressers/barbers and health services such as physiotherapy can remain open.
Mr Morrison said hairdressers and barbers should limit customers to spend no more than 30 minutes at their salon or shop.
Shopping centres will remain open however food court seating will close and food court dining will change to take away only.
Retail auction houses will close and open houses and home auctions will also be closed.
Mr Morrison said a decision on outdoor and indoor markets would be made specifically by states.
Despite gyms closing, outdoor boot camps and personal training can continue but there is a limit to 10 people with social distancing strictly enforced.
Mr Morrison said people should keep their household visitors to a minimum with a very small number of guests only allowed.
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However he said barbecues, parties and extended family gatherings were off the cards.
"We don't want to be overly specific about that, we want Australians to exercise common sense," he said.
"If you're gathering together outside in a group 10 people, that's not okay.
Mr Morrison said medical advice on schools had not changed but arrangements would be made in meetings with the Australian Education Union on Wednesday to ensure they could remain open.
He said he did not want students having to miss out on a year of their education.
"It is safe to send your children to school," he said.
Safe Traveller will change the advice on international travel from do not travel to a ban.