Victoria has brought back its version of the border bubble from December so residents of certain local government areas can cross the border as long as they stay within certain areas of Victoria.

The Victorian government has declared all of NSW and the ACT a red zone under Victoria's travel permit system, effective from 11:59pm Sunday July 11.

Prior to that point, Greater Sydney, Blue Mountains, Central Coast, Shellharbour and Wollongong are red zones and all other local government areas in NSW (plus ACT) were orange zones.

The 'border bubble' is still in place.

What is the border bubble?

The border bubble is a list of local government areas on the NSW and Victorian sides of the border where residents in those areas can cross the border during the current restrictions without a permit or need to spend time in quarantine.

Which local government areas are in the border bubble?

Why has Victoria changed the permit system?

Victorian Health Minister Martin Foley said the state's public health team had taken the step of introducing tougher border permit system because of the risk of the highly contagious Deltra strain of coronavirus.

"This was done on the basis of health advice from the Acting Chief Health Officer, who took the view, quite rightly, that the deteriorating position in NSW and the risks of incursions that Victoria needed to take the steps to seriously limit the movement of people," Mr Foley said.

"In doing so, we have reconfirmed that the border bubble arrangements are still in place and that eligible people ... who live within those cross border communities can continued to go about their business."

What is the number of coronavirus transmissions in NSW?

On Monday morning, NSW recorded an additional 112 cases of coronavirus transmission, including 34 people who were not previously in isolation.

NSW Premier Gladys Berejiklian said she did not want to see the coronavirus reach regional NSW and thanked regional communities for their cooperation so far.

"Given where the numbers are, it's not likely in fact almost impossible for us to get out of lockdown on Friday ... the length of the lockdown will depend on our ability to come together and to follow health advice across the state," she said.

"Because it would be a big irony if we did all the hard yards and got rid of the virus in certain parts of Sydney and then had it creep into the regions.

"All of us have the accountability to do the right thing because none of us wants to be in this situation for longer than we have to be."

What do I need to travel across the border into Victoria?

To travel into Victoria without a permit, people who live in the cross-border community just need to carry proof of address such as a driver's licence or two documents such as a Medicare card, Centrelink correspondence, credit card or bill.

There are other requirements if you have been in a orange zone in the past two weeks or in a red zone, or if you have COVID-19, any symptoms, or are a close contact of someone who has COVID-19.

What about if I have been outside the border bubble in NSW?

if you have been to what were previously 'orange zone' areas of NSW outside the border bubble in the two weeks prior to 11:59pm Sunday July 11, you must get a COVID-19 test and receive a negative result before crossing the border.

The previous orange zone areas were all of NSW except for Greater Sydney, Blue Mountains, Central Coast, Shellharbour and Wollongong.

If you have been to an orange zone in NSW in the past two weeks, you will need to have a COVID-19 test and a negative result.

If you have been to a red zone in NSW, you will need a red zone permit which is available only to Victorian residents unless through an exemption.

In other news

If I enter Victoria from NSW, can I go further south than the border bubble?

Residents of the border bubble communities do not require a travel permit to travel to metropolitan Melbourne or further afield in regional Victoria, unless they have been in an orange or red zone outside of the cross-border community.

However, authorities have asked NSW residents to stay within the Victorian cross-border area at all times.

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: