What is necessary for a U.S. LE aircraft to enter coastal State airspace?

For a U.S. law enforcement (LE) aircraft to enter coastal State airspace, it is essential to provide notice to coastal State authorities. This is in accordance with international law and national regulations, which aim to respect the sovereignty of coastal States over their airspace. Notifying the appropriate authorities ensures that the coastal State is aware of the aircraft's presence and purpose, fostering cooperation and coordination, particularly in matters of security and law enforcement.

Authorization from international bodies, patrol clearance from the Coast Guard, or specific federal government authorization may be relevant in different operational contexts, but they do not replace the necessity of informing coastal State authorities. The need for notice emphasizes respect for national sovereignty and the importance of maintaining communication with local authorities during operations involving law enforcement in coastal areas.