All attendees at private gatherings in NSW that breach coronavirus restrictions can now be fined

Anyone at a private event with more than 20 people can now be fined $1000 each, under changes to the public health order in NSW.

NSW Police said the new changes came into effect at midnight this morning, in anticipation of the warmer weather and larger gatherings leading up to Christmas.

"Where previously, only the organiser of a gathering was liable to receive a fine if the number of people at the premises breached the Public Health Order, every person in attendance will now be held individually responsible for the breach," a NSW Police spokesperson said.

UPDATES: Palaszczuk defiant on borders; Northern Territory coronavirus free

READ MORE: NSW records just four more cases

The new fines will impact both outdoor and indoor events, and will impact Christmas parties and family events over the summer.

Operation Corona Virus Commander, Assistant Commissioner Tony Crandell, said that as with the previous restrictions, these amendments have been made with community safety in mind.

"Coming into the warmer months, and with end-of-year festivities around the corner, it's only natural that people will have additional reasons to want to gather and get together," Assistant Commissioner Crandell said.

"These amendments aim to ensure that an increase in expected gatherings doesn't mean an increase in COVID-19 cases."

You can get up-to-date information from the Federal Government's Coronavirus Australia app, available on the App Store, Google Play and the Government's WhatsApp channel.

Beyond Blue's Coronavirus Mental Wellbeing Support Service is a 24/7 service free of charge to all Australians. Visit the site here or call 1800512348.

For coronavirus breaking news alerts and livestreams straight to your smartphone sign up to the 9News app and set notifications to on at the App Store or Google Play