Workshop on Proposed Amendments to the Advanced Clean Trucks Regulation

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October 17, 2023

Workshop on Proposed Amendments to the Advanced Clean Trucks Regulation

The California Air Resources Board invites you to participate in a public meeting to discuss proposed minor amendments to the Advanced Clean Trucks (ACT) regulation. The proposed amendments would be expedited to fulfill commitments in the Clean Truck Partnership to finalize amendments in 2024. For this reason, the changes for this rulemaking effort will be limited to non-substantial, administrative, or minor adjustments to the regulation to smooth implementation. At this meeting, staff is seeking feedback from manufacturers, fleet owners, and other interested stakeholders.

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 ACT - Meetings & Workshops website.

Date:                November 13, 2023
Time:                10:00 a.m. – 12:00 p.m. (Pacific Time)
Location:          California EPA Headquarters, Sacramento
                         Coastal Hearing Room
                         1001 I Street, Sacramento
                         Register for Zoom meeting if participating online

Meeting materials will be made available in advance of the meeting on the ACT website.


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

  • Removing the “ultimate purchaser” sales requirement from annual reporting while ensuring final compliance is based on actual sales into California
  • Increasing the length of the deficit makeup period for up to three years
  • Clarifying the manufacturer and other definitions
  • Updating language to better align with the Advanced Clean Cars II regulations credit provisions for medium-duty passenger vehicles
  • Modifying reporting requirements to more clearly identify acceptable documentation for vehicle tracking, and adjustments to various reporting requirements

Other potential changes like the concept of credit and deficit pooling between other states are outside the scope of this rule making. Any more extensive changes will require emissions analysis and alternative assessment that cannot be completed in an expedited process.


In January 2021, the ACT regulation was adopted as part of a comprehensive strategy to accelerate a large-scale ZEV deployment of medium- and heavy-duty vehicles in California.

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), Assembly Bill (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 ACT regulation, please visit the Advanced Clean Trucks 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.