Frustratingly (and in keeping with how confusing the messaging has been from the Australian government on all aspects of this pandemic), there is no single easy source that lists these new restrictions in a nice simple format.

https://www.abc.net.au/news/2020-03-29/public-gatherings-limited-to-two-people-coronavirus-covid-19/12101162

https://www.abc.net.au/news/2020-03-29/scott-morrison-coronavirus-covid19-two-person-rule-explained/12101212

https://www.smh.com.au/politics/federal/elderly-australians-told-to-self-isolate-at-home-outdoor-gatherings-restricted-to-two-people-20200329-p54f1g.html

• All gatherings, whether indoors or outdoors, are limited to 2 people. Exceptions apply for people you're living with (you're already sharing germs with them). However, previous limits of 5 people for weddings and 10 people for funerals still apply.

• People should only leave the house for necessary activities, such as: shopping for supplies, exercising, medical care, work, school.

• Elderly people should stay home and self-isolate. This applies to: healthy people over 70; unhealthy people over 60; indigenous people over 50. (And if we ever needed evidence that indigenous people have worse health than everyone else, this announcement proves it.)

• Public playgrounds, outside gyms, and skate parks will close.

These rules are all advisory, rather than legal. However, individual states can choose to enforce them legally.

News article: The Governments of New South Wales, Victoria, and the Australian Capital Territory will proceed to a more comprehensive shutdown of non-essential services over the next 48 hours in an attempt to slow the spread of coronavirus.

For non-Australians: New South Wales and Victoria are Australia's two most populous states. Between them, they contain about 60% of the Australian population. They naturally also have the highest number of coronavirus cases.

The Australian Capital Territory is a land-locked region totally surrounded by NSW. It's the home of our capital city, Canberra. It's small in population but, if NSW is clamping down, the ACT pretty much has to follow.