CFR › Title 30 › Part 250 › §250.171430 CFR §250.1714Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkYou must ensure that all well plugs:(a)Provide downhole isolation of hydrocarbon and sulphur zones;(b)Protect freshwater aquifers; and(c)Prevent migration of formation fluids within the wellbore or to the seafloor.