CFR›Title 40›Chapter I›Part 449 ContainsSubpart A; Appendix A; Subpart BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 449—AIRPORT DEICING POINT SOURCE CATEGORY Contents A Subpart A—Airport Deicing Category Sections 449.1–449.20 Appendix A to Part 449 Appendix A to Part 449—Sampling Protocol for Soluble COD B Subpart B [Reserved] Authority33 U.S.C. 1311, 1314, 1316, 1318, 1342, 1361 and 1370.Source77 FR 29203, May 16, 2012, unless otherwise noted. Previous 447 Part 447—Ink Formulating Point Source Category Next 450 Part 450—Construction and Development Point Source Category