CFR›Title 40›Chapter I›Part 91 ContainsSections 91.1–91.2 through 91.3CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 91—CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES Sections 91.1 § 91.1 Applicability. 91.2 through 91.3 §§ 91.2 through 91.3 [Reserved] Authority42 U.S.C. 7401-7671q.Source86 FR 34372, June 29, 2021, unless otherwise noted. Previous 90 Part 90—Control of Emissions from Nonroad Spark-Ignition Engines at or Below 19 Kilowatts Next 92 Part 92—Control of Air Pollution from Locomotives and Locomotive Engines