CFR›Title 40›Chapter I›Part 63›Subpart KKKK›Subject Group Emission Limitations ContainsSections 63.3490–63.3493CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 63.3490 § 63.3490 What emission limits must I meet? 63.3491 § 63.3491 What are my options for meeting the emission limits? 63.3492 § 63.3492 What operating limits must I meet? 63.3493 § 63.3493 What work practice standards must I meet? Previous Compliance Requirements for the Emission Rate Without Add-On Controls Option Compliance Requirements for the Emission Rate Without Add-On Controls Option Next General Compliance Requirements General Compliance Requirements