Which governmental body would oversee communications regulations related to aviation?

The Federal Communications Commission (FCC) oversees communications regulations related to aviation because its primary role is to manage all non-federal government use of the radio spectrum, which includes communication systems used in aviation such as air traffic control, flight communications, and other aviation-related communications. The FCC establishes policies, licensing schemes, and standards aimed at ensuring efficient use of the electromagnetic spectrum and safeguarding the safety and integrity of all communications operating in that spectrum.

The other bodies mentioned have different areas of focus. The Department of Transportation deals with broader transportation policies and infrastructure but does not specifically regulate communication systems. The Environmental Protection Agency is primarily concerned with environmental protection and public health, not communications, while the National Transportation Safety Board is focused on investigating transportation accidents and recommending safety improvements, but does not regulate communication systems in aviation. This clear division of responsibilities highlights why the FCC is the correct answer in the context of aviation communications regulation.