CFR›Title 40›Chapter I›40 CFR Part 89 Citation40 CFR Part 89ContainsSections 89.1–89.2 through 89.3CorpusDaily eCFRDisplayed edition2026-06-29Last updated2026-06-29 PART 89—CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Sections 89.1 § 89.1 Applicability. 89.2 through 89.3 §§ 89.2 through 89.3 [Reserved] Authority42 U.S.C. 7401-7671q.Source86 FR 34372, June 29, 2021, unless otherwise noted. Previous 88 Part 88—Clean-Fuel Vehicles Next 90 Part 90—Control of Emissions from Nonroad Spark-Ignition Engines at or Below 19 Kilowatts