CFR›Title 49›Subtitle B›Chapter VIII›Part 831 ContainsSubparts A–ECorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 831—INVESTIGATION PROCEDURES Subparts A Subpart A—General Sections 831.1–831.15 B Subpart B—Aviation Investigations Sections 831.20–831.22 C Subpart C—Highway Investigations Section 831.30 D Subpart D—Railroad, Pipeline, and Hazardous Materials Investigations Section 831.40 E Subpart E—Marine Investigations Sections 831.50–831.64 Authority49 U.S.C. 1113(f). Section 831.15 also issued under Pub. L. 101-410, 104 Stat. 890, amended by Pub. L. 114-74, sec. 701, 129 Stat. 584 (28 U.S.C. 2461 note).Source82 FR 29685, June 29, 2017, unless otherwise noted. Previous 830 Part 830—Notification and Reporting of Aircraft Accidents or Incidents and Overdue Aircraft, and Preservation of Aircraft Wreckage, Mail, Cargo, and Records Next 835 Part 835—Testimony of Board Employees