CFR›Title 45›Subtitle B›Chapter VI›Part 671›Subpart F ContainsSection 671.17CorpusDaily eCFRDisplayed edition2026-05-20Last updated2026-05-20 Subpart F—Cases of Emergency Sections 671.17 § 671.17 Cases of emergency. Previous E Subpart E—Designation of Banned Substances; Reclassification of Pollutants