"This will be a significant sacrifice, I know," Prime Minister Scott Morrison told reporters in Canberra after an emergency meeting of state and territory leaders.
Morrison said businesses involved in beauty therapy, tattoo parlors, physio therapists and other allied health services could no longer operate. Real estate open houses and auctions were also banned, he said.
Weddings could go ahead only with five people present, including the celebrant, while funerals could proceed with 10 people at most and outdoor social gatherings should also be limited to 10, Morrison added.