CFR›Title 10›Chapter I›Part 63›Subpart L›Subject Group Additional Provisions ContainsSections 63.342–63.343CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 63.342 § 63.342 Limits on performance assessments. 63.343 § 63.343 Severability of individual protection and groundwater protection standards. Previous 63.305 § 63.305 Required characteristics of the reference biosphere. Next Groundwater Protection Standards Groundwater Protection Standards