Which entity is primarily responsible for aviation safety regulations?

The primary entity responsible for aviation safety regulations in the United States is the Federal Aviation Administration (FAA). The FAA oversees all aspects of civil aviation, including the regulation and oversight of aircraft operations, air traffic management, pilot certification, and airport safety standards. This agency is dedicated to ensuring the safety of passengers and aircrew members by setting comprehensive regulations that the aviation industry must follow.

In contrast, other options listed do not hold the same regulatory authority in the U.S. The Federal Aviation Agency is an outdated term and is often confused with the FAA, but it is not recognized as the current name or operating entity. The Aeronautical Administration Board does not exist; therefore, it cannot be responsible for aviation safety regulations. The International Air Transport Authority is also incorrect because it does not serve as a regulatory body at a national level; instead, its focus is more on global aviation standards rather than enforcing safety regulations within any single nation's airspace. Thus, the Federal Aviation Administration is correctly identified as the primary authority for aviation safety regulations.