Which document contains identifiers that are authorized by the FAA?

Order 7350.9 is the correct document that contains identifiers authorized by the FAA. This order specifies the guidelines and protocols for assigning, publishing, and revising the identifiers used in the National Airspace System (NAS). These identifiers, which include airport codes, navigation aids, and waypoints, are crucial for ensuring operational consistency and safety in aviation, as they help pilots and air traffic controllers navigate the airspace effectively.

The other documents, while relevant to various aspects of aviation, do not specifically serve the same purpose regarding the authorization of identifiers. The Aeronautical Information Manual provides important information about the rules and procedures for flying, but it does not contain the official list of identifiers. The Flight Procedure Handbook focuses on the procedures for flight operations but does not have the comprehensive cataloging of identifiers. The Aeronautical Chart User's Guide explains how to read and understand aeronautical charts, rather than providing the specific identifiers authorized by the FAA.