40 CFR Part 1051 Subpart B
Control of Emissions from Recreational Engines and Vehicles - Emission Standards and Related Requirements.
40 CFR Part 1051 Subpart D
Control of Emissions from Recreational Engines and Vehicles - Testing Production-line Vehicles and Engines.
40 CFR Part 1051 Subpart H
Control of Emissions from Recreational Engines and Vehicles - Averaging, Banking and Trading for Certification.
40 CFR Part 1051 Subpart I
Control of Emissions from Recreational Engines and Vehicles - Definitions and Other Reference Information.