CFR›Title 18›Chapter III›18 CFR Part 420 Citation18 CFR Part 420ContainsSubject groups Charges; Exemptions–Water Supply PolicyCorpusDaily eCFRDisplayed edition2026-09-25Last updated2026-09-25 PART 420—BASIN REGULATIONS—WATER SUPPLY CHARGES Subject Groups Charges; Exemptions Charges; Exemptions Entitlement; Measurement; Billing Entitlement; Measurement; Billing General General Hydroelectric Power Water Use Charges Hydroelectric Power Water Use Charges Water Supply Policy Water Supply Policy AuthorityDelaware River Basin Compact, 75 Stat. 688.Source42 FR 13544, Mar. 11, 1977, unless otherwise noted.