StacksVerified U.S. regulatory reference

40 CFR Part 60, Table 4

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Mobile source provisions citationSubject of citationApplies to subpartExplanation
1048 subpart AOverview and ApplicabilityYes
1048 subpart BEmission Standards and Related RequirementsYesExcept for the specific sections below.
1048.101Exhaust Emission StandardsNo
1048.105Evaporative Emission StandardsNo
1048.11Diagnosing MalfunctionsNo
1048.14Certifying Blue Sky Series EnginesNo
1048.145Interim ProvisionsNo
1048 subpart CCertifying Engine FamiliesYesExcept for the specific sections below.
1048.205(b)AECD reportingYes
1048.205(c)OBD RequirementsNo
1048.205(n)Deterioration FactorsYesExcept as indicated in 60.4247(c).
1048.205(p)(1)Deterioration Factor DiscussionYes
1048.205(p)(2)Liquid Fuels as they requireNo
1048.240(b)(c)(d)Deterioration FactorsYes
1048 subpart DTesting Production-Line EnginesYes
1048 subpart ETesting In-Use EnginesNo
1048 subpart FTest ProceduresYes
1065.5(a)(4)Raw sampling (refers reader back to the specific emissions regulation for guidance)Yes
1048 subpart GCompliance ProvisionsYes
1048 subpart HReserved
1048 subpart IDefinitions and Other Reference InformationYes
1048 appendix I and IIYes
1065 (all subparts)Engine Testing ProceduresYesExcept for the specific section below.
1065.715Test Fuel Specifications for Natural GasNo
1068 (all subparts)General Compliance Provisions for Nonroad ProgramsYesExcept for the specific sections below.
1068.245Hardship Provisions for Unusual CircumstancesNo
1068.25Hardship Provisions for Small-Volume ManufacturersNo
1068.255Hardship Provisions for Equipment Manufacturers and Secondary Engine ManufacturersNo