Staff and pupils will be "expected" to wear face masks in schools on the Isle of Man.
It is one of a number of new restrictions introduced on the Isle of Man following the detection of the Omicron virus in the UK.
Isolation and testing rules will also be tightened at the island's border with anyone travelling to the island from outside the Common Travel Area having to isolate and take a Covid-19 test.
The new rules come in at 04:00 on 30 November.
From this time, mask wearing will be compulsory on public transport and within health care settings- elsewhere it will be "expected but not mandatory".
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night
Mountain Road unlikely to open before Monday
Yellow warning for freezing temperatures tonight