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| make face masks mandatory (Eurostar makes face masks mandatory, and planes could be next 'More); make face masks obligatory (Eurostar to make face masks obligatory for passengers from next week · 'More); make face masks compulsory (The Dutch government has so far resisted calls to make face masks compulsory. 'More) | |||
| introduce face mask requirement (However, not all airlines are introducing face mask requirements. 'More) | |||