Definition
The section of U.S. federal aviation regulations that establishes the rules for operating aircraft in security-sensitive airspace, including Air Defense Identification Zones (ADIZ). It sets requirements for flight plans, two-way radio communication, transponder use, and position reporting for aircraft entering, operating in, or transiting these areas.
Plain English
The federal rule book that tells pilots what they must do — like file a flight plan, stay in radio contact, and use a transponder — when flying in or near U.S. airspace that's watched closely for national security reasons.
Context Anchor
Seen in discussions of special use airspace, national security airspace, and Air Defense Identification Zone procedures.
Derivation
Title 14 is the section of the Code of Federal Regulations dealing with 'Aeronautics and Space.' The CFR organizes all U.S. federal rules by subject; aviation rules live in Title 14. 'Part 99' is one chapter within that title, dedicated specifically to security control of air traffic.
Why Pilots Care
Noncompliance can result in military interception, flight delays, or regulatory violations.
Intuition Check
Do not read title as the name of a book or part as a loose piece of information. In this context, Title 14 and part 99 are exact locations in federal law.
Example Sentence 1
Before crossing the coastal ADIZ on his flight to the Bahamas, the pilot reviewed 14 CFR part 99 to make sure he had filed the required flight plan and would maintain two-way radio contact.
Example Sentence 2
During the flight the crew maintained continuous two-way radio contact in accordance with 14 CFR part 99 security procedures.