CFR›Title 14›Chapter I›Part 99 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 99—SECURITY CONTROL OF AIR TRAFFIC Subparts A Subpart A—General Sections 99.1–99.31 B Subpart B—Designated Air Defense Identification Zones Sections 99.41–99.49 Authority49 U.S.C. 106(g), 40101, 40103, 40106, 40113, 40120, 44502, 44721.SourceDocket 25113, 53 FR 18217, May 20, 1988, unless otherwise noted. Previous 97 Part 97—Standard Instrument Procedures Next 101 Part 101—Moored Balloons, Kites, Amateur Rockets, and Unmanned Free Balloons