CFR›Title 49›Subtitle B›Chapter VIII›Part 831›Subpart C ContainsSection 831.30CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 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