CFR›Title 49›Subtitle B›Chapter VIII›Part 831›Subpart C ContainsSection 831.30CorpusDaily eCFRDisplayed edition2026-05-18Last updated2026-05-18 Subpart C—Highway Investigations Sections 831.30 § 831.30 Authority of NTSB in highway investigations. Previous B Subpart B—Aviation Investigations Next D Subpart D—Railroad, Pipeline, and Hazardous Materials Investigations