CFR›Title 18›Chapter VIII›Part 806›Subpart E ContainsSections 806.40–806.45CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart E—Registration of Grandfathered Projects Sections 806.40 § 806.40 Applicability. 806.41 § 806.41 Registration and eligibility. 806.42 § 806.42 Registration requirements. 806.43 § 806.43 Metering and monitoring requirements. 806.44 § 806.44 Determination of grandfathered quantities. 806.45 § 806.45 Appeal of determination. Source82 FR 29394, June 29, 2017, unless otherwise noted. Previous D Subpart D—Terms and Conditions of Approval