Advanced Clean Fleets and Low Carbon Fuel Standard Regulations

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This page last reviewed September 18, 2025

Proposed Amendments to the Advanced Clean Fleets and Low Carbon Fuel Standard Regulations

Hearing Date(s)
Public Comments Received Second Batch of Public Comments Received
Erratum
Final Approval / OAL Action

OAL has approved this rulemaking action and filed with the Secretary of State on September 10, 2026.  

Addendum to the Final Statement of Reasons
Final Regulation Order A-1
Final Regulation Order A-1.1 (Alternative Format)
Attachment A-2
Attachment A-2.1 (Alternative Format)
Attachment A-3, High Priority Fleets Requirements
Attachment A-3.1 (Alternative Format)
Attachment A-4, Drayage Fleet Requirements
Attachment A-4.1 (Alternative Format)
Request for Early Effective Date
Adopted Regulations and Materials Submitted to OAL

The Final Package was submitted to OAL on July 29, 2026.  OAL has until September 11, 2026, to make their decision.

Final Statement of Reasons  (see addendum above)
Updated Informative Digest
Executive Order
Final Regulation Order A-1  (see revised above)
Final Regulation Order A-1.1 (Alternative Format)  ~see revised above~
Attachment A-2  ~see revised above~
Attachment A-2.1 (Alternative Format)  ~see revised above~
Attachment A-3, High Priority Fleets Requirements  (see revised above)
Attachment A-3.1 (Alternative Format)  ~see revised above~
Attachment A-4 Drayage Fleet Requirements  (see revised above)
Attachment 4.1 (Alternative Format)  ~see revised above~
Hearing Action and Supplemental 15 Day Notices

Second 15-day Changes Posted June 1, 2026

Second Notice of Public Availability of Modified Text and Availability of Additional Documents  (Deadline to Comment: June 16, 2026)
Attachment A-1: Second 15-day Changes Available for Comment-Version Meeting Requirements of the APA
Attachment A-2: Proposed 15-Day Changes to Proposed Regulation Order (Proposed Sections for Adoption). Attachment A-2 was posted on June 1, 2026, and updated on June 3, 2026, to ensure accessibility by minor corrections to the "Note" description, and made no alterations to the regulation text of this attachment. This update reflects a correction of an alternative format posting error.  (~Alternative Format to Attachment A-1~)
Attachment A-3: Second 15-Day Changes Compared to Original Regulation Text (Attachment A-3 was posted on June 1, 2026, and updated on June 3, 2026, to ensure accessibility by minor corrections to the "Note" description. Regulation sections which are not proposed to be modified in this second 15-day change proposal, but were part of the 45- and first 15-day proposals, were added to the regulatory text for Attachment A-3, because this Attachment A-3 is intended to demonstrate cumulative changes from the original regulation text. This update reflects a correction of an alternative format posting error.)  (For Review Only)
Posted
Notice of Public Availability of Modified Text and Availability of Additional Documents  (Deadline to Comment: April 17, 2026)
Appendix A-1: 15-day Proposed Regulation Order  (15-day Changes Available for Comment)
Appendix A-2: 15-day Proposed Regulation Order  ~Alternative Format to A-1~
Appendix A-3: 15-Day Changes Compared to Original Regulation Text.  ~For Review Only~
Appendix B: Updated Emissions Charts for the Proposed Amendments to the Advanced Clean Fleets (ACF) and Low Carbon Fuel Standard Regulations released on August 1, 2025, and approved by the Board on September 25, 2025  (For Review Only)
Public Hearing Notice and Related Material
Posted
Notice of Public Hearing  (Deadline to Submit Public Comments: September 15, 2025, or at the Public Hearing.)
Staff Report: Initial Statement of Reasons
Appendix A-1: SLG Proposed Regulation Order
Appendix A-1.1: Alternate Version of the SLG Proposed Regulation Order
Appendix A-2: LCFS Proposed Regulation Order
Appendix A-2.1: Alternate Version of the LCFS Proposed Regulation Order
Appendix A-3: High Priority Fleets Regulation Order
Appendix A-3.1: Alternate Version of the High Priority Fleets Regulation Order
Appendix A-4: Drayage Final Regulation Order
Appendix A-4.1: Alternate Version of the Drayage Final Regulation Order