The top authority of a commercial airport is typically the Airport Director or the Chief Executive Officer (CEO) of the airport authority. This individual is responsible for the overall strategic direction, financial health, and operational safety of the entire facility. Underneath them, the Airport Manager or "Director of Operations" handles the day-to-day logistics, ensuring compliance with federal aviation regulations (like the FAA in the U.S. or EASA in Europe). However, it is important to distinguish between administrative authority and "operational" authority. When it comes to the movement of aircraft, the Air Traffic Control (ATC) Tower Manager holds the ultimate authority over the runways and airspace. On the "landside" (security and terminals), government agencies like the TSA (in the U.S.) or local police commanders have the final word on security matters. The Airport CEO acts as the "mayor" of the airport city, balancing the needs of airlines, retail tenants, government regulators, and the traveling public to ensure the airport functions as a safe and profitable gateway.