You will need to wear a face covering again to travel on buses in Guernsey from tomorrow (10 March)
It is because of a rise in Covid-19 case numbers in the island.
There are 1,527 known active cases. 1,196 new cases have been identified in the past week up to 8 March.
CT Plus says it is reintroducing the measure to protect customers and staff and to minimise any disruption to services.
The bus operator currently has some staff off work with the infection.
"In an effort to protect staff and passengers and also ensure a return to a service with fewer disruptions, CT Plus has been in consultation with Traffic and Highway Services who support a company making face-coverings mandatory again to ensure the safety of all at this time.
From Thursday 10 March face-coverings will be mandatory on buses. We wish all the staff currently affected with Covid a speedy recovery and thank passengers for their understanding and support at this challenging time."

Driver jailed in Guernsey’s first ‘serious injury by dangerous driving’ case
Guernsey Police begin winter roadworthiness campaign
Third mobile provider enters Channel Islands market
Frustration as some struggle to open their Guernsey tax coding notice
Tech-savvy course launches for Guernsey's older generation
8-year-old Guernsey girl wins nature photography award
New date confirmed for Guernsey charity sleep out
Move to plug leaks at one of Guernsey's most popular pools