CFR›Title 40›Chapter I›Part 63›Subpart VVV›Subject Group Applicability ContainsSections 63.1580–63.1581CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 63.1580 § 63.1580 Am I subject to this subpart? 63.1581 § 63.1581 Does the subpart distinguish between different types of POTW treatment plants? Next Requirements for Group 1 and Group 2 POTW Treatment Plants Requirements for Group 1 and Group 2 POTW Treatment Plants