Can an onboard wheelchair be used while the "Fasten Seatbelt" sign is illuminated?

The use of an onboard wheelchair when the "Fasten Seatbelt" sign is illuminated is prohibited for safety reasons. When this sign is on, it indicates that the aircraft is either preparing for takeoff, landing, or encountering turbulence, and passengers must remain seated with their seatbelts fastened. Allowing passengers to move around or use wheelchairs during these critical phases could lead to injury both to the passenger in the wheelchair and to others onboard, as sudden turbulence or abrupt changes in the aircraft's motion can occur. This procedure ensures the safety of all passengers during elevated risk periods, making it crucial not to allow such movement until it is deemed safe by the crew.