Authorities are expecting to find "at least one positive case" in Binjari Community after a new wastewater test showed a stronger presence of COVID-19 in the area.
Chief Minister Michael Gunner announced on Saturday morning that health and emergency service teams spent yesterday working in 43C heat to test the community for COVID-19 and administer vaccinations.
The tests are still being processed, but Mr Gunner said he is expecting someone to test positive.
"Were expecting to find at least one positive case," Mr Gunner said.
"But we've got all the measures in place that we'll see the virus trapped there and we'll be able to deal with it."
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He said the wastewater in the community had been retested and returned a "stronger positive" result for COVID-19.
Mr Gunner also announced that the NT had recorded one new positive case, a woman in her 30s from Robinson River.
The woman, who is fully-vaccinated and a close contact of the first case in the remote community, has been in Howard Springs during her whole infectious period.
He also raised concerns about how a 59-year-old woman, who tested positive in Katherine on Thursday, contracted the virus because although she was a family member of a number of positive cases, she hadn't been in contact with them during their infectious period.
Changes for fully-vaccinated people entering the Territory were also announced, with Mr Gunner saying those travelling to the NT from hotspots will be able to undergo seven days home quarantine from Monday.
This is under a number of conditions including that they produce a negative test result within 72 hours of arriving in the NT, undergo a rapid antigen test at the point of entry, stay in an area with a high vaccination rate and undergo testing again on days five, eight and 14.
Home quarantine will then be scrapped for all full-vaccinated travellers from December 20, including from hotspots.
"This is a month ahead of plan and five days before Christmas."
The changes to the roadmap come as new modelling has found the NT's remote communities will reach 80 per cent fully vaccinated by the end of the year.
Police Commissioner Jamie Chalker told media 16 people in Katherine had been issued fines for breaching the Chief Health Officer's directions on Friday, with one person being charged.
"These issues range from; leaving the lockdown area outside of the five reasons to be outside, not wearing masks and congregating."
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