Riverina Police acting commander Adrian Telfer said their "mantra has now changed to enforcement" and any person or business in breach of tough new health orders should expect police action.

Acting Commander Telfer said the missing individual is currently under an isolation order and should have been at home.

"That person wasn't located at the time. So this morning, we are following that up," he said.

Acting Commander Telfer said local police had a "very well coordinated" list of people who have travelled to the region from Victoria, which was being updated every day.

"We do have a number of people in the Riverina who are currently in isolation having travelled from Victoria," he said.

He said police would be doing random checks to ensure those people "and anyone in the future" are complying with official health orders.

Under the new orders, any person who has been in Victoria within the past 14 days must not travel to NSW.

NSW residents will have to obtain a permit to cross the border and must then self-isolate for 14 days upon their return.

"If we do detect someone who is meant to be in isolation who is out in the community, we will take action," Acting Commander Telfer said.

NSW Police are cracking down on tough new restrictions, including those around the newly created "border zones."

The stricter rules mean people who live inside certain border community bubbles, "blue zones" which are outlined on a map on the Service NSW website, will only be able to cross the border for essential healthcare, work or education.

Anyone who previously had a permit to cross the border will have to reapply, as all previous permits expired just before midnight last night.

Acting Commander Telfer said anyone without a new permit "will be turned around by police".

"So please work with us. We have seen just this morning, a number of people approach our checkpoints across New South Wales with permits that are now expired," he said.

"However, I can assure you that New South Wales Police Force, we've been working with those motorists to the point where those motorists weren't entirely turned away, we were able to facilitate those permits at the actual checkpoints."

Acting Commander Telfer said anyone wanting to cross the border must lodge an application with Service NSW.

"What we ask the community to please understand: this is a huge operation currently underway. Please expect delays," he said.

"We certainly recommend that you avoid travelling during the peak times, both in the morning and towards the evening.

"That is where we are seeing our delays increase, but rest assured that we are working tirelessly to improve the efficiency of these checkpoints."

IN OTHER NEWS:

Acting Commander Telfer said the NSW Police force was "heavily invested" in the massive Victorian-NSW border operation.

"Look, it's been almost two weeks now since this operation has been underway. And from as far as we're concerned, it's been a tremendous success," he said.

Acting Commander Telfer said Riverina Police were relying on the public to alert them to any potential breaches of the restrictions.

"We do have a number of phone calls coming in each day about potential breaches, whether it be a shopping complexes, licence venues, or people failing to self isolate, and we act on that information," he said.

NSW Premier Gladys Berejiklian is urging community members and staff to dob in businesses not adhering to strict new restrictions from Friday.

16 people tested positive for coronavirus over Tuesday night in NSW bringing the state's total number of confirmed cases to 3425.

Ms Berejiklian said authorities were still unsatisfied with levels of compliance among business across the state.

Tighter restrictions will come into effect from Friday for all restaurants, cafes and bars, including limiting bookings to 10 people and mandatory COVIDSafe plans.

"Any business that doesn't do the right thing, will have the book thrown at them," Ms Berejiklian said.

"You will be fined. Worse than that, if you breach again, you will be shut down."

Wagga restaurateur Robert Baliva, who co-owns Thaigga and Tammy's Thai Kitchen, said the new restrictions wouldn't have much of an impact on either of his businesses.

"We have Thaigga restuarant [which has] 60 seats total. We weren't really taking bookings for big groups unless it was a weeknight or a lunch or something," Mr Baliva said.

"It's going to be more function places I'd say, that are hurting.

"The only thing that would impact us now is dropping maximum numbers of seating in the shop."

Mr Baliva said his businesses had already implemented their COVIDsafe plans.

"We're prepared. We're ready for anything that's coming," he said.