Aircraft safety: requirements for certain highly trafficked domestic airspace

Notwithstanding section 1046 of the National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 , 49 U.S.C. 40101 note), except as provided in subsection (b), the Secretary of a military department may not authorize any manned rotary wing aircraft of the Department of Defense to operate a training mission in a covered airspace unless such aircraft, while being operated, is actively providing warning of the proximity of such aircraft to nearby commercial aircraft in a manner compatible with the traffic alert and collision avoidance system of such commercial aircraft.

(Added Pub. L. 119–60, div. A, title III, § 373(a) , Dec. 18, 2025 , 139 Stat. 837 .)