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Title 40

Displaying title 40, up to date as of 7/16/2026. Title 40 was last amended 7/16/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter UAir Pollution Controls1000 – 1099
Part 1045Control of Emissions from Spark-Ignition Propulsion Marine Engines and Vessels1045.1 – 1045.825
Subpart AOverview and Applicability1045.1 – 1045.30
Subpart BEmission Standards and Related Requirements1045.101 – 1045.145
Subpart CCertifying Engine Families1045.201 – 1045.255
Subpart DTesting Production-line Engines1045.301 – 1045.350
Subpart EIn-Use Testing1045.401 – 1045.425
§ 1045.401What testing requirements apply to my engines that have gone into service?
§ 1045.405How does this program work?
§ 1045.410How must I select, prepare, and test my in-use engines?
§ 1045.415What happens if in-use engines do not meet requirements?
§ 1045.420What in-use testing information must I report to EPA?
§ 1045.425What records must I keep?
Subpart FTest Procedures1045.501 – 1045.520
§ 1045.501How do I run a valid emission test?
§ 1045.505How do I test engines using discrete-mode or ramped-modal duty cycles?
§ 1045.515What are the test procedures related to not-to-exceed standards?
§ 1045.520What testing must I perform to establish deterioration factors?
Subpart GSpecial Compliance Provisions1045.601 – 1045.660
Subpart HAveraging, Banking, and Trading for Certification1045.701 – 1045.745
Subpart IDefinitions and Other Reference Information1045.801 – 1045.825
Appendix I to Part 1045
Summary of Previous Emission Standards
Appendix II to Part 1045
Duty Cycles for Propulsion Marine Engines