Can taxi or push back be permitted if an FA briefs the exit row passengers before takeoff?

The assertion that taxi or push back cannot be permitted if a flight attendant briefs the exit row passengers before takeoff is correct, as it underlines the importance of adhering to safety protocols and procedures. Before a flight can proceed with taxiing or push back, the crew is required to ensure that all safety briefings, particularly for exit row passengers, are completed and understood. This is crucial because the exit row passengers have specific responsibilities during an emergency, and it is vital for their comprehension of these duties to be clearly communicated.

In this context, safety regulations typically dictate that no aircraft can move until all preparations are finalized, which includes comprehensive briefings. If the exit row briefing is incomplete or not sufficiently communicated, it puts the safety of passengers at risk, hence preventing taxi or push back is necessary. The rules apply regardless of passenger requests or emergency statuses, as safety practices must always be the priority.