When must required flight crew members' safety belts be fastened?

The requirement for flight crew members to have their safety belts fastened primarily relates to ensuring safety during flight operations. While there are regulations regarding when safety belts should be used, it is crucial for crew members to have their safety belts fastened while at their stations, particularly because they are responsible for the safety and operation of the aircraft.

Fastening safety belts while at their stations helps protect flight crew in the event of sudden turbulence or other in-flight emergencies. This practice is aligned with safety protocols that prioritize the well-being of those operating the aircraft. In this context, the focus is on ensuring that crew members are prepared to respond effectively and maintain control while secured in their positions.

Other scenarios, such as during takeoff, in-flight, or during taxiing, have specific regulations for passengers and might suggest when safety belts should be worn. However, those regulations do not negate the requirement for flight crew members to remain secured at their stations while conducting their duties.