Which agency provides notices to airmen regarding flight restrictions?

The Federal Aviation Administration (FAA) is the agency responsible for issuing Notices to Airmen (NOTAMs) that inform pilots about various flight restrictions and critical information affecting the safety and efficiency of flight operations. These notices can include temporary flight restrictions, changes in the status of navigational aids, and critical safety information.

The FAA plays a central role in regulating all aspects of civil aviation, and its NOTAM system serves as a vital communication tool for ensuring pilots are aware of any hazards or changes that could impact their flights. This is essential for maintaining safety in the National Airspace System.

Other agencies mentioned, such as the National Transportation Safety Board (NTSB), the Department of Defense (DoD), and the Transportation Security Administration (TSA), have different roles within aviation law and safety but do not provide NOTAMs directly for flight restrictions. Therefore, the FAA is correctly identified as the authoritative source for this information.