About 5.30pm on Saturday in the border towns of Echuca and Moama, police spoke to a 63-year-old Victorian resident who drove into NSW via the Cobb Highway Bridge.

The man allegedly refused to provide police with identification or a permit to enter the state, stating he was a 'sovereign citizen'.

After refusing a direction to leave under the current Public Health Order, he was arrested and taken to Moama Police Station.

He was charged with not complying with noticed direction (section 7/8/9 - COVID-19) and granted conditional bail.

The man, from Fyansford - near Geelong - is due to appear in Moama Local Court in September.

Also on Saturday afternoon, Monaro Police officers attended a gathering in Thredbo where they allegedly observed a breach of size limits on the venue.

Police say they also observed people waiting in line without regard for physical distancing, more than 10 people seated at a table, no COVID-Safe marshals and patrons failing to be seated while socialising.

The licensee was spoken to, and when police returned an hour later, further breaches were observed while some allegedly tried to evade police on foot.

Two fines of $5000 were issued to the licensee. The owner of a travel company who had organised for a large number of patrons to attend the venue was also issued a $5000 PIN.

He was ordered not to re-enter NSW without a valid entry permit or exemption and returned to his vehicle on the Victorian side of the border.

Just before midnight on Friday night, officers attached to Monaro Police District issued 12 people with $1000 penalty infringement notices (PINs) after happening upon a large outdoor gathering near Lake Jindabyne.

Near bushland, police found up to 200 people gathered in an organised dance party, and handed out PINs for failure to comply with direction (in relation to section 7/8/9 COVID-19) to eight men aged and four women all aged in their 20s and 30s.