California Mobile Sources regulations & environmental compliance analysis

California Mobile Sources: What you need to know

Governing Law and Regulations

Vehicle inspection and maintenance:

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Smog testing: 16 California Code of Regulations (CCR) 3340.1 to 3394.6 and California Health & Safety Code (CH & SC) 44000 to 44122

Onboard diagnostics (OBD): 13 CCR 1968.1, 13 CCR 1968.2, and 13 CCR 1971.1

In-use vehicle test programs: 13 CCR 2100 to 2140

Heavy-duty vehicle inspection program: 13 CCR 2180 to 2189

Periodic smoke inspections of heavy-duty diesel vehicles: 13 CCR 2190 to 2194

Automobile emissions standards:

Motor vehicle and engine certification program: 13 CCR 1955.1, 13 CCR 1955.5, and 13 CCR 1959 to 1962.2

Low-emissions vehicles (LEVs): 13 CCR 1961 to 1961.3

Zero-emissions vehicles (ZEVs): 13 CCR 1962 to 1962.2

Motorcycles: 13 CCR 1958

Environmental performance label: 13 CCR 1965

Heavy-duty vehicle emissions standards:

Motor vehicle and engine certification program: 13 CCR 1952, 13 CCR 1956 and 1956.1, 13 CCR 1956.5 to 1956.9, and 13 CCR 1957

Trucks, buses, and other heavy-duty engines: 13 CCR 2025

Heavy-duty drayage trucks: 13 CCR 2027

Heavy-duty diesel engine idling: 13 CCR 1956.8(a)(6)

Heavy-duty vehicle GHG emissions: 17 CCR 95300 to 95311

Engine manufacturer diagnostic (EMD) systems: 13 CCR 1971

OBD for heavy-duty engines: 13 CCR 1971.1

The Carl Moyer incentive program: CH & SC 44275 to 44299.2

Transit fleets: 13 CCR 2023 to 2023.4

School bus idling and idling at schools: 13 CCR 2480

Commercial vehicle idling: 13 CCR 2485

Municipal or utility vehicles: 13 CCR 2022 and 13 CCR 2022.1

Solid waste collection vehicles: 13 CCR 2021 to 2021.2

Transportation refrigeration units: 13 CCR 2477

Employer trip reduction and commuting:

Parking cash-out: CH & SC 43845

Nonroad engine standards:

Nonroad diesel (compression ignition) engines: 13 CCR 2420 to 2427

Nonroad gasoline (spark ignition) engines:


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California Mobile Sources Resources

Type Title
Forms Stage II System Decommissioning Notification Form
See all Mobile Sources Resources