Workshop on Proposed Amendments to the Advanced Clean Fleets Regulation

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March 1, 2024

Workshop on Proposed Amendments to the Advanced Clean Fleets Regulation

The California Air Resources Board (CARB) invites you to participate in a public meeting to discuss proposed targeted amendments to the Advanced Clean Fleets (ACF) regulation to implement the requirements of Assembly Bill (AB) 1594 (Garcia, Chapter 585, Statutes of 2023). At this meeting, staff is seeking feedback from all interested stakeholders including utility fleet owners.

The meeting will be held in person in Sacramento and via Zoom as indicated below. Remote participants must register via Zoom. This meeting will be recorded and made available on the ACF - Meetings & Workshops website.

Date:                 March 25, 2024
Time:                 9:00 a.m. – 12:00 p.m.
Location:           California EPA Headquarters, Sacramento
                          Coastal Hearing Room
                          1001 I Street, Sacramento
                          Register for Zoom meeting if participating online


The following is a summary of potential amendments to be discussed at the workshop:

  • The definition of public agency utility and utility-specialized vehicles.
  • Necessary changes to the Zero-Emission Vehicle (ZEV) Purchase & Daily Usage exemptions for defined public agency utilities to allow replacements without regard to the model year of the vehicle being replaced.
  • Necessary changes to the Daily Usage exemption to allow for usage data that does not rely on the lowest mileage reading and exclude the highest usage days.


In October 2023, the ACF regulation was adopted as the latest development in CARB’s decades long‑ history of setting increasingly stringent emission standards for mobile sources that are needed to protect the public health and welfare of Californians by improving air quality and by mitigating the harms posed by greenhouse gases. The ACF regulation complements CARB’s recently adopted Advanced Clean Trucks regulation, and will help advance the introduction of zero-emission technologies into California’s truck and bus fleets requiring fleets that are well suited for electrification to reduce emissions through requirements to both phase-in the use of ZEVs for targeted fleets and requirements that manufacturers only manufacture ZEV trucks starting in the 2036 model year.

Achieving California’s long-term air quality, climate, and public health goals will require a transition from the conventional combustion technologies to zero-emission everywhere feasible and near-zero-emission powered by clean, low-carbon renewable fuels everywhere else. Promoting the development and use of zero-emission trucks will contribute to the goals set by the Governor’s Executive Order N-79-20 and the Sustainable Freight Action Plan, and will help achieve emission reductions as outlined in the State Implementation Plan, Senate Bill (SB) 350 (de León, Chapter 547, Statutes of 2015), AB 32 (Nuñez, Chapter 488, Statutes of 2006), and SB 32 (Pavley, Chapter 249, Statutes of 2016), and AB 1279. This effort is part of a broader strategy to increase clean, affordable transportation options such as zero-emission technologies, innovative methods to improve freight activity, and efficiency of transportation systems in California.


If you wish to receive information regarding the proposed amendments to the ACF regulation, please visit the ACF Website and sign up to receive future updates and notices of upcoming meetings.

If you require a special accommodation or need this document in an alternate format (i.e., Braille, large print) or another language, please contact Mr. Harinder Phagura, as soon as possible. TTY/TDD/Speech to Speech users may dial 711 for the California Relay Service.