NOTIFICATION

Addendum

The following communication, dated 6 April 2026, is being circulated at the request of the delegation of the United States of America.

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Title: Public Availability of Modified Text and Availability of Additional Documents and Information for the Proposal to Permanently Adopt the Emergency Vehicle Emissions Regulations

Description: The California Air Resources Board (CARB) has determined that additional modifications are appropriate for the proposed amendments and has developed proposed modifications (15-Day Changes). The Appendices showing the specific proposed modifications to the text of the proposed regulation being made with these 15-Day Changes are shown in multiple ways to meet the requirements of the Administrative Procedure Act (APA) while also posting alternate/complementary versions that provide increased accessibility to view the modifications.

Documents posted 3 April 2026 - https://ww2.arb.ca.gov/rulemaking/2025/orhdomnibus

Notice of Public Availability of Modified Text and Availability of Additional Documents (Deadline to Comment: 20 April 2026)

Appendix A-3.1 (15-Day Changes Available for Comment)

Appendix A-3.2 ~Alternate Format to Appendix A-3.1~

Appendix A-3.3 ~For Review Only~

Appendix A-4-1.1 (15-Day Changes Available for Comment)

Appendix A-4-1.2 ~Alternate Format to Appendix A-4-1.1~

Appendix A-4-1.3 ~For Review Only~

Appendix A-4-2.1 (15-Day Changes Available for Comment)

Appendix A-4-2.2 ~Alternate Format to Appendix A-4-2.1~

Appendix A-4-2.3 ~For Review Only~

Appendix A-5.1 (15-Day Changes Available for Comment)

Appendix A-5.2 ~Alternate Format to Appendix A-5.1~

Appendix A-5.3 ~For Review Only~

Appendix A-6.1 (15-Day Changes Available for Comment)

Appendix A-6.2 ~Alternate Format to Appendix A-6.1~

Appendix A-6.3 ~For Review Only~

Resolution 26-3

Additional Documents Added to the Record

In the interest of completeness and in accordance with Government Code section 11347.1, subdivision (a), CARB staff has also added to the rulemaking record and invites comments on the following:

Title 13, CCR, Section 1956.8.1

California Exhaust Emission Standards and Test Procedures for 1985 through 2003 Model Heavy-Duty Diesel-Engines and Vehicles, amended December 12, 2002, incorporated by reference in title 13, CCR, section 1956.8.1(b).

California Exhaust Emission Standards and Test Procedures for 1987 through 2003 Model Heavy-Duty Otto-Cycle Engines and Vehicles, amended December 27, 2000, incorporated by reference in title 13, CCR, section 1956.8.1(d).

California Non-Methane Organic Gas Test Procedures, amended December 6, 2012, incorporated by reference in title 13, CCR, section 1956.8.1(d).

Title 13, CCR, Section 2423.0.1

Part I-C (Parts 1039/1065/1068): California Exhaust Emission Standards and Test Procedures for New 2008-2010 Tier 4 Off-Road Compression-Ignition Engines, amended October 25, 2012, incorporated by reference in title 13, CCR, section 2421(a)(4)(A).

Part I-D (Part 1039): California Exhaust Emission Standards and Test Procedures for New 2011 and Later Tier 4 Off-Road Compression-Ignition Engines, amended October 25, 2012, incorporated by reference in title 13, CCR, section 2421(a)(4)(B).

Part I-E (Part 1065): California Exhaust Emission Standards and Test Procedures for New 2011 and Later Tier 4 Off-Road Compression-Ignition Engines, adopted October 25, 2012, incorporated by reference in title 13, CCR, section 2421(a)(4)(B).

Part I-F (Part 1068): California Exhaust Emission Standards and Test Procedures for New 2011 and Later Tier 4 Off-Road Compression-Ignition Engines, amended October 25, 2012, incorporated by reference in title 13, CCR, section 2421(a)(4)(B).

Title 13, CCR, Section 2485.0.1

California Exhaust Emission Standards and Test Procedures for 2004 and Subsequent Model Heavy-Duty Diesel Engines and Vehicles, amended October 21, 2014, incorporated by reference in title 13, CCR, section 2485.0.1(c).

California 2001 through 2014 Model Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2009 through 2016 Model Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles, amended December 6, 2012, incorporated by reference in title 13, CCR, section 2485.0.1(c).

WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by 4pm Eastern Time on 20 April 2026. Comments will be shared with CARB if received within the comment period. Alternatively, comments can be submitted directly at https://carb.commentinput.com/?id=pDaE58US3. The link for comment submissions will expire once the comment period has closed. Comments submitted directly to CARB should be shared with the USA TBT Enquiry Point.

Comments posted by CARB are accessible at https://carb.commentinput.com/comment/extra?id=pDaE58US3.

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[1] This information can be provided by including a website address, a pdf attachment, or other information on where the text of the final/modified measure and/or interpretive guidance can be obtained.