More than 1500 people have crossed the border into the Northern Territory in the past day, with 14 directed into mandatory supervised quarantine.
The Northern Territory lifted quarantine measures for some regions on Friday, but they remain in place for anyone coming from Victoria or the greater Sydney region where COVID-19 cases are on the rise.
Police say the heaviest traffic remains on the Stuart Highway, with 730 arrivals by road from South Australia processed at the Kulgera border check point. Fewer than 200 arrived by air.
"We are very happy to report that no quarantine infringement notices were issued yesterday," incident controller Shaun Gill said in a statement on Sunday.
The penalty for failing to abide by the chief health officer directions is a $5056 fine for an individual and $25,280 for a business.
Police and environmental health officers continue to conduct compliance checks and have issued 143 fines.
The Northern Territory has avoided any community transmission or deaths from coronavirus.