CFR›Title 49›Subtitle B›Chapter VI›Part 672›49 CFR Part 672 Subpart D Citation49 CFR Part 672 Subpart DContainsSection § 672.31CorpusDaily eCFRDisplayed edition2026-08-31Last updated2026-08-31 Subpart D—Compliance and Certification Requirements Sections § 672.31 § 672.31 Requirement to certify compliance. Authority49 U.S.C. 5329, 5334; 49 CFR 1.91.Source89 FR 66007, Aug. 14, 2024, unless otherwise noted. Previous C Subpart C—Administrative Requirements