Masks are no longer mandatory anywhere in NSW from Monday, with commuters to decide for themselves if they need to wear one on public transport.

Big weddings and funerals are back with no limit on guest numbers, while dancing and singing will be allowed in any environment.

There is no limit on the number of visitors allowed in homes, but a COVID-safe plan must be enacted if it exceeds 100.

Up to 200 people are allowed at personal outdoor public gatherings, while entertainment venues can operate at 100 per cent seated capacity.

Treasurer Dominic Perrottet last week declared the rolling back of restrictions, which comes a year after the emergence of the pandemic, meant NSW was "pretty much back to normal".

But authorities promised an enforcement push on QR-code check-ins over coming weeks, which were described as "the key to our success".

Premier Gladys Berejiklian said if an outbreak occurred and contact tracers could not identify venue attendees, rules would need to be re-tightened.

The premier said the changes were possible as there was no community transmission and the vaccine rollout was progressing well, with 100 per cent of quarantine workers now vaccinated with at least one dose of Pfizer.

The families of frontline workers are next in line to get the jab.

Ms Berejiklian urged people to remain sensible by using hand sanitiser, getting tested and staying home if they have respiratory symptoms.

The easing of restrictions has not been affected by the emergence of locally-acquired COVID-19 cases in Queensland over recent days.

However, NSW Health revealed on Sunday afternoon it was contacting more than 20,000 people who have entered the state on flights from March 20-26 over the cluster.

Travellers are being asked if they attended any venues on Queensland Health's COVID-19 hotspot list.

Nine close contacts have so far been identified. They have been told to get a test and to self-isolate for two weeks, no matter the result.

NSW COVID-19 RULES TO EASE ON MONDAY:

* No cap on numbers at weddings or funerals

* Masks on public transport no longer mandatory

* Dancing and singing allowed everywhere

* No caps on visitors in homes. If more than 100 people attend, there must be a COVID-19 safety plan and visitor details must be electronically recorded

* Up to 200 people allowed at personal outdoor public gatherings

* One person per two square metres at venues where more than 25 people are present

* Entertainment venues at 100 per cent seated capacity

IN THE NEWS:

Australian Associated Press