CFR›Title 40›Chapter I›Part 72›Subpart D ContainsSections 72.40–72.44CorpusDaily eCFRDisplayed edition2026-09-17Last updated2026-09-17 Subpart D—Acid Rain Compliance Plan and Compliance Options Sections 72.40 § 72.40 General. 72.41 § 72.41 Phase I substitution plans. 72.42 § 72.42 Phase I extension plans. 72.43 § 72.43 Phase I reduced utilization plans. 72.44 § 72.44 Phase II repowering extensions. Previous C Subpart C—Acid Rain Permit Applications Next E Subpart E—Acid Rain Permit Contents