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Greater Darwin's lockout is set to end with Chief Minister Michael Gunner declaring the Northern Territory has control of the Top End's first community COVID-19 outbreak.
The territory's cluster grew by one new case to four on Tuesday after a male close contact of the index case fell ill in quarantine.
Mr Gunner said the "new case was not a threat" and the lockout will end as planned at 11.59pm on Tuesday.
The man had been in quarantine for his entire infectious period and there were no new close contacts or exposure sites linked to the case.
"I'm also pleased to be able to report that all of the other indicators in Greater Darwin are excellent," Mr Gunner told reporters.
Wastewater testing has returned negative for the virus, and two pubs and a restaurant the source case visited have been downgraded from close contact to casual contact sites.
"So with all of the above factors in mind, we can move out of the Greater Darwin lockout with confidence that we've traced and tracked the virus," Mr Gunner said.
Face masks will need to be worn until 5pm on Friday in most public places.
Health restrictions were imposed in Greater Darwin and Katherine, 320km to the south, late on Thursday after a 26-year-old unvaccinated man contracted the virus without leaving the NT.
The diagnosis alarmed authorities when they realised the origin of his infection was potentially roaming about the territory.
Katherine was fully locked down, along with unvaccinated people in Greater Darwin, until the source was found to be a woman who had flown to the NT from Cairns.
She had also visited South Australia and Victoria before lying on her NT border entry form and spending two nights with the index case at a Darwin hotel.
The woman was fined $5024 on Sunday, when the full lockdown in Katherine was eased to a lockout of unvaccinated people.
That ended at 5pm on Monday, but the lockout of unvaccinated people in Greater Darwin was extended by 24 hours to Tuesday night after authorities interviewed the woman and learned she had visited three venues while infectious.
NT Health said the woman was infected with a Victorian Delta strain.
The scheduled end to the lockout comes as the NT prepares to enforce a recently released health directive that makes it mandatory for most workers to have at least one vaccine by Friday.
Mr Gunner said it was simple to get the vaccine and would only be a problem if workers chose not to be vaccinated.
The NT government has been criticised by some business groups and unions who say there could be staffing shortfalls after the mandate takes effect.
Workers that continue to attend workplace could be fined $5000 for failing to comply with a mandated health directive.
Second doses will need to be complete by December 24.
Mr Gunner also launched a spirited verbal attack on Aboriginal controlled health services for withholding vaccine rate data for 29 remote communities despite multiple requests from the NT government.
"We've asked politely, we've asked through the media, I've asked through National Cabinet, we've asked from our officials to their officials," he said.
"I would like to have that individual vaccination data. I would like to do everything I can to save a bloody life and it's about bloody time they gave us that vaccine data."
Meanwhile, NT Police Commissioner Jamie Chalker said charges would be laid against three people after a violent protest against mandatory vaccines in Darwin on Saturday.
Police allege some protesters threw a liquid chemical at officers causing burns.
Mr Chalker said infringement notices would also be issued to protesters who failed to wear masks at the rally.
Seven people were previously charged with an array of offences, including aggravated assault, assaulting police, riotous behaviour and breaching health orders.