What must a certificate holder verify before allowing taxi or pushback?

Before a certificate holder allows taxi or pushback, it is essential to ensure that at least one required crewmember verifies that no exit seat is occupied by someone unable to perform the necessary functions in case of an emergency. This is a crucial safety requirement as it ensures that all passengers seated in exit rows are able and willing to assist in the event of an evacuation or emergency situation. The responsibilities assigned to crewmembers regarding exit seating are outlined in federal aviation regulations, emphasizing the importance of situational awareness and passenger safety on board.

While seating passengers correctly, weather conditions, and baggage tagging are also important considerations for flight safety and operational readiness, they do not specifically relate to the immediate concerns regarding passenger responsibilities during an emergency evacuation situation, which is why verifying exit seat occupancy is critical before taxi or pushback.