CFR›Title 40›Chapter I›Part 51›40 CFR Part 51 Subpart K Citation40 CFR Part 51 Subpart KContainsSections § 51.210–§ 51.214CorpusDaily eCFRDisplayed edition2026-09-18Last updated2026-09-18 Subpart K—Source Surveillance Sections § 51.210 § 51.210 General. § 51.211 § 51.211 Emission reports and recordkeeping. § 51.212 § 51.212 Testing, inspection, enforcement, and complaints. § 51.213 § 51.213 Transportation control measures. § 51.214 § 51.214 Continuous emission monitoring. Authority23 U.S.C. 101; 42 U.S.C. 7401-7671q.Source51 FR 40673, Nov. 7, 1986, unless otherwise noted.