CFR›Title 40›Chapter I›Part 63›Subpart NNNN›Subject Group Compliance Requirements for the Compliant Material Option ContainsSections 63.4140–63.4142CorpusDaily eCFRDisplayed edition2026-07-30Last updated2026-07-30 Sections 63.4140 § 63.4140 By what date must I conduct the initial compliance demonstration? 63.4141 § 63.4141 How do I demonstrate initial compliance with the emission limitations? 63.4142 § 63.4142 How do I demonstrate continuous compliance with the emission limitations? Next Compliance Requirements for the Emission Rate With Add-On Controls Option Compliance Requirements for the Emission Rate With Add-On Controls Option