Heavy-Duty Engine and Vehicle Omnibus Regulation Amendments

This page last reviewed Mayo 31, 2024

Proposed Amendments to the Heavy-Duty Engine and Vehicle Omnibus Regulation

Hearing Date(s)
Public Comments Received
Final Approval / OAL Action

CARB Submitted a Request for Waiver Action Pursuant to Clean Air Act Section 209(e) for the “Omnibus” Low NOx Regulation, as Amended in 2023

OAL approved the rulemaking and filed with Secretary of State on May 31, 2024. The effective date is May 31, 2024.

Adopted Regulations and Materials Submitted to OAL

The final rulemaking package was submitted to OAL on April 18, 2024. OAL has until May 31, 2024, to make a final determination.

Attachment A-1: Final Regulation Order  (See Revised Above)
Alternate Format to the Final Regulation Order: Attachment A-2  ~Microsoft Word document version of document posted directly above (See Revised Above)~
Attachment B-1: Final Modifications to the Diesel Engine Test Procedures  (See Revised Above)
Alternate Format to the Diesel Engine Test Procedures: Attachment B-2  ~Microsoft Word document version of document posted directly above (See Revised Above)~
Attachment C-1: Final Modifications to the Otto-Cycle Engine Test Procedures  (See Revised Above)
Alternate Format to the Otto-Cycle Engine Test Procedures: Attachment C-2  ~Microsoft Word document version of document posted directly above (See Revised Above)~
Updated Informative Digest  (See Revised Above)

On December 28, 2023, CARB approved the Executive Order adopting the Proposed Amendments to the Heavy-Duty Engine and Vehicle Omnibus Regulation. CARB will file the final rulemaking documents with OAL (including the FSOR) when those documents are ready for submittal.

Posted
Hearing Action and Supplemental 15 Day Notices
Posted
Notice of Public Availability of Modified Text  (Deadline to Comment: December 21, 2023)
Appendix A-1: Proposed 15-Day Changes to Proposed Regulation Order  (15-Day Changes Available for Comment)
Appendix A-2  ~Alternate Format to Appendix A-1~
Appendix A-3  ~Alternate Version~
Appendix B-1: Proposed 15-Day Changes to Proposed Modifications to the Diesel Engine Test Procedures  (15-Day Changes Available for Comment)
Appendix B-2  ~Alternate Format to Appendix B-1~
Appendix B-3  ~Alternate Version~
Appendix C-1: Proposed 15-Day Changes to the Otto-Cycle Engine Test Procedures  (15-Day Changes Available for Comment)
Appendix C-2  ~Alternate Format to Appendix C-1~

Accessibility

Consistent with California Government Code section 7296.2, documents posted to this webpage may be made available in an alternate format or another language.  Disability-related reasonable accommodations may also be requested. If you are experiencing difficulty accessing these documents or would like an accommodation, an alternate format, or a different language, please contact Bradley Bechtold at (279) 208-7266 or Chris Hopkins at (279) 208-7347.