What are the primary sources of the FAA's authority over airspace and flight safety?

The correct choice identifies the Interstate Commerce Act and the Federal Aviation Act as primary sources of the FAA's authority over airspace and flight safety.

The Interstate Commerce Act established a framework for regulating interstate transportation, which includes air travel, while the Federal Aviation Act specifically created the FAA and provided it with the authority to regulate civil aviation safety, airspace utilization, and the operation of commercial and private aircraft. These two pieces of legislation collectively grant the FAA the power to create and enforce regulations that ensure the safety and efficiency of air travel, as well as to manage the national airspace system.

In contrast, state regulations and local ordinances generally cannot override federal regulations in the area of aviation, as the FAA's authority is federal and takes precedence. Environmental regulations and international treaties may influence aviation practices but do not serve as primary sources of authority for the FAA. Congressional resolutions and executive orders can play roles in governance but do not provide the foundational regulatory authority necessary for the FAA to operate in managing airspace and flight safety.

This understanding of how the FAA derives its power is crucial for grasping the greater context of aviation law and regulation.