appropriate ATS authority
appropriate ATS (air traffic services) authority
The relevant authority designated by the state responsible for providing air traffic services in the airspace concerned. The relevant authority of the state of registry is the appropriate authority for flight over the high seas. In all other areas, the appropriate authority is the relevant authority having sovereignty over the territory being over flown.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved