Summary
This regulation (14 CFR Part 99) establishes Air Defense Identification Zones (ADIZ) requiring civil aircraft to maintain two-way radio communication, file flight plans (DVFR or IFR), operate transponders with altitude reporting, and provide position reports when operating into, within, or out of the United States through an ADIZ. It applies to all civil aircraft except certain exempted operations within the 48 states, Alaska under specific conditions, and slow-moving aircraft (<180 knots) in Hawaii, Alaska, and Guam. The rule includes emergency deviation provisions and exemptions for aircraft without electrical systems, balloons, and gliders.
Reason
National defense is a core constitutional function of the federal government (Article I, Section 8). ADIZ rules are essential for identifying, locating, and controlling aircraft in areas vital to air defense, preventing unauthorized incursions into sensitive airspace, and providing early warning of potential threats. The regulatory burden—radio communication, flight plans, and transponders—is minimal and directly proportional to the security benefits. The rule includes sensible exemptions for local flights, slow aircraft, and emergencies, minimizing unnecessary interference. Deleting this regulation would create a dangerous gap in national security infrastructure, making the homeland more vulnerable to airborne threats. The unseen cost of repeal—potential security breaches—far outweighs the modest compliance costs borne by aircraft operators near defense zones.