CFR›Title 18›Chapter III›Part 420›Subject Group General ContainsSection 420.1CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 420.1 § 420.1 Definitions. Previous Entitlement; Measurement; Billing Entitlement; Measurement; Billing Next Hydroelectric Power Water Use Charges Hydroelectric Power Water Use Charges