We thought it would never happen, and some even predicted that the obligation to wear a mask when flying was here to stay - but it hasn't! Some airlines have decided to stop requiring their passengers to wear masks....
Whether it is a legal obligation, a decision of the airline or a recommendation or directive of an international organization, the wearing of masks is now mandatory in airplanes for passengers and crew, with the exception of pilots once...
Since the beginning of the COVID-19 crisis, or at least since more is known about the virus, the wearing of masks on airplanes has become the rule for passengers and staff.
However, the rule is not as absolute as that...