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Truck & Bus Final Regulation
Truck & Bus Program Page
Diesel Rule QuickGuide Walkthrough

Regulation Applies To:
- Diesel vehicles with a gross vehicles weight rating greater than 14,000lbs.
- Privately and federally owned trucks and buses that operate in California
- Includes any person, business, school district, tribal reservation, or federal government agency that owns, operates, leases or rents affected vehicles.
► Exempt Vehicles: ▼ Exempt Vehicles:
  • - Gasoline or dedicated natural gas vehicles
    - Solid Waste Colletion Vehicles
    - Public Agency and Utility Vehicles (Not Federal)
    - Drayage (Port or Rail) Trucks
    - Transit/Urban Buses
    - Personal use motor homes or recreational vehicles

- Diesel trucks and buses with a GVWR that is 14,001+lbs must reduce exhaust emissions by meeting particulate matter (PM) filter requirements and upgrading to 2010 model year (MY) or newer engines:

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Forms & Factsheets
- Compliance Requirements Factsheet
- Low Use Vehicle Exemption
- Low-Mileage Work Truck Option
- NOx Exempt Area Extension
- Small Fleet Provision
- Three Day Pass
- Lighter Vehicle Compliance Options

Financial Assistance and Free Training
- Funding Resources Index



Please note:

- The opt-in period for some optional provisions and extensions has closed and will not reopen, regardless of circumstances. Other provisions have a yearly opt-in period from January 1 - 31 every year. Please read all provided information included in the factsheets found within the list on the left.



- The small fleet option is closed. You must have met the requirements and should have already been reported to use this option. Your first truck should have a PM filter installed. The second truck has until January 1, 2017 to install a PM filter. The third truck has until January 1, 2018 to install a PM filter.

DPF/soot filters (diesel particulate filter, VDECS, PM filter, exhaust retrofit)


Upcoming Deadlines:


January 1, 2016 January 1, 2016
    All heavy vehicles follwing the engine model year schedule with Engine Model Years 94-95 need a 2010 or newer model year engine.
    All light vehicles follwing the engine model year schedule with Engine Model Year 96 need a 2010 or newer model year engine.

  • Owners using any of the following extensions below are required to meet a percent of total fleet compliance:
  • - Phase-in option must meet 100%
  • - Log truck provision must meet 30%
  • - NOx exempt must meet 40%
  • - Low-mileage construction truck must meet 60%

January 31, 2016 January 31, 2016

Reporting deadline for:

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