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U.S. Department of State - Great Seal

U.S. Department of State

Diplomacy in Action

Diplomatic Clearances and State Aircraft


Diplomatic Aircraft Clearances

Diplomatic Overflight and Landing Clearances and Sovereignty Support.

ISO provides diplomatic clearance for foreign state aircraft seeking to enter U.S. national airspace. Foreign missions in the United States submit clearance requests to ISO via the automated Diplomatic Clearance Application System (DCAS). ISO coordinates these requests with the Department of Transportation, the Department of Homeland Security, the Department of Defense, U.S. Secret Service, and various airport authorities, as appropriate.

Diplomatic Ship Clearances

Description: Foreign state naval vessel.  - State Dept Image

ISO provides diplomatic clearance for foreign state naval vessels seeking to enter U.S. ports. Foreign missions in the United States submit clearance requests to ISO via the automated Diplomatic Clearance Application System (DCAS), ISO coordinates these requests with the Department of Defense and the Department of Homeland Security.

State Aircraft Policy

Description: Aircraft. - State Dept Image

ISO is the State Department lead on U.S. state aircraft policy, ensuring that procedures for U.S. state aircraft are consistent with international and domestic laws, agreements, and accepted practice. ISO coordinates with the Department of Defense and every other agency which operates state aircraft in international and foreign airspace.



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