CFR›Title 49›Subtitle B›Chapter XII›Part 1542 ContainsSubparts A–DCorpusDaily eCFRDisplayed edition2026-04-23Last updated2026-04-23 PART 1542—AIRPORT SECURITY Subparts A Subpart A—General Sections 1542.1–1542.5 B Subpart B—Airport Security Program Sections 1542.101–1542.113 C Subpart C—Operations Sections 1542.201–1542.221 D Subpart D—Contingency Measures Sections 1542.301–1542.307 Authority49 U.S.C. 114, 5103, 40113, 44901-44905, 44907, 44913-44914, 44916-44917, 44935-44936, 44942, 46105.Source67 FR 8355, Feb. 22, 2002, unless otherwise noted. Previous 1540 Part 1540—Civil Aviation Security: General Rules Next 1544 Part 1544—Aircraft Operator Security: Air Carriers and Commercial Operators