When Safety belts are required to be properly secured about which persons in an aircraft and when?

- The aircraft is taking off or landing.

- The aircraft is in flight and the "Fasten Seat Belt" sign is illuminated.

- The aircraft is encountering severe or turbulent weather conditions.

- The pilot in command determines that it is necessary for safety reasons.

Additionally, children under 2 years of age must be secured in a child restraint system on an aircraft at all times.