Who administers and enforces safety regulations for the operation of civil aviation aircraft?

The correct choice highlights the role of an Aviation Safety Inspector, who is specifically trained and authorized to oversee and enforce safety regulations within the civil aviation sector. These inspectors are responsible for ensuring that all aviation operations, including aircraft maintenance, pilot training, and flight operations, comply with safety standards established by relevant aviation authorities. They conduct regular inspections, audits, and investigations to ensure compliance and enhance overall aviation safety.

In contrast, the other roles mentioned do not have the same authority or specific focus on regulatory enforcement in civil aviation. Airport police typically handle security and law enforcement matters at airports but do not have a dedicated role in regulating aviation safety. Aeronautical engineers primarily focus on the design and development of aircraft and their systems, while not overseeing operational regulations. The Civil Aeronautics Board was once responsible for regulating economic aspects of civil aviation, but not specifically for enforcing safety regulations in the manner that Aviation Safety Inspectors do.