Non-essential shops in the North of Ireland will close from the end of trading on Christmas Eve for at least four weeks.
Stormont Ministers have agreed a six-week lockdown will be imposed from December 26, in a bid to curb the spread of Covid-19.
The Stormont Executive will review the measures after four weeks.
Close-contact services, such as hair salons, barbers and beauty salons will have to shut and hospitality will be restricted to delivering takeaway services.
However, it is understood people from up to three households in the North of Ireland will still be able to meet over the festive period in so-called Christmas “bubbles”.
It follows a previous agreement between the UK nations to stick to plans to allow three households to mix between 23 and 27 December.
The new lockdown is being imposed in response to rising numbers of cases of the virus in Northern Ireland.
Health officials have proposed essential shops in the North of Ireland would have to close by 8 pm every night during the first week of a new lockdown.
On Thursday, a further 12 Covid-linked deaths were recorded in NI and a further 656 cases of the virus.
Hospitality Ulster said a full lockdown may now be required.
Chief executive Colin Neill said his board would support a full lockdown to get the virus under control.
Mr Neill accepted a lockdown would have a big impact on the hospitality sector but added “what is worse is opening and closing all the time”.
“Every time you have to reopen costs a lot of money and every time you have to close costs a lot of money because of wastage,” he told BBC’s Stephen Nolan Show.
“If we are going for lockdown, then we will support a total lockdown until we get this thing under control,” he said.
“I think we can all see the situation at our hospitals,” he said. “We need to go back to what we did in March and April.”
Mr Neill said many within the hospitality sector only remained open so they could earn enough to pay their contribution towards furlough and retain their staff.
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