CFR›Title 40›Chapter I›Part 63›Subpart XX›Subject Group Introduction ContainsSections 63.1080–63.1081CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 63.1080 § 63.1080 What is the purpose of this subpart? 63.1081 § 63.1081 When must I comply with the requirements of this subpart? Previous Implementation and Enforcement Implementation and Enforcement Next Monitoring Requirements for Heat Exchange Systems Monitoring Requirements for Heat Exchange Systems