Code of Federal Regulations > Title 49 > Chapter VIII > Part 831 - PART 831—INVESTIGATION PROCEDURES

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 16, 2025

Subpart A [§ 831.1 - § 831.15] - Subpart A—General

Subpart B [§ 831.20 - § 831.22] - Subpart B—Aviation Investigations

Subpart C [§ 831.30 - § 831.30] - Subpart C—Highway Investigations

Subpart D [§ 831.40 - § 831.40] - Subpart D—Railroad, Pipeline, and Hazardous Materials Investigations

Subpart E [§ 831.50 - § 831.64] - Subpart E—Marine Investigations