Truck & Bus Flexibilty Options
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Currently, there are limited options available. These options require reporting in CARB's TRUCRS reporting system. If a vehicle does not qualify for these options, it must follow the engine model year compliance schedule.
Low-Use Exemption
Low-use vehicles are vehicles that travel less than 1,000 miles per year, including vehicles that are not operated (even if they have a non-op registration). A vehicle that travels more than 1,000 miles annually can use the low-use vehicle exemption as long as it operates less than 1,000 miles within California each year. The low-use option allows the vehicle to be exempt from PM filter and engine replacement requirements. Annual odometer reporting in TRUCRS is required to demonstrate compliance with this option. Third party records must be kept and provided upon request to obtain and maintain this exemption.
NOx Exempt Area Flexibility Option:
Beginning January 1, 2020, vehicles can remain under the NOx Exempt Area option and avoid vehicle replacement or they can be upgraded based on the Engine Model Year Compliance Schedule to operate statewide. Annual reporting in TRUCRS is required to demonstrate compliance with this option. There are limited circumstances under which a PM filter can be newly installed on a vehicle and be considered to meet the final requirements of the regulation if they operate solely in NOx Exempt Areas. Eligibility must first be determined.