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The California Air Resources Board (CARB or Board) has posted a Third Notice of Public Availability of Modified Text for the Proposal to Permanently Adopt the Emergency Vehicle Emissions Regulations (Third 15-Day Notice).
Public Hearing Date: March 26, 2026
Public Availability Date for First 15-Day Changes: April 3, 2026
Public Availability Date for Second 15-Day Changes: June 30, 2026
Public Availability Date for Third 15-Day Changes: July 21, 2026
Deadline for Public Comment on Third 15-Day Changes: August 5, 2026
Written Comment Period & Comment Submittal
Written comments will only be accepted on the modifications identified in the Notice. Comments may be submitted by postal mail or by electronic submittal no later than the due date to the following:
Postal mail: Clerks’ Office, California Air Resources Board
1001 I Street, Sacramento, California 95814
Electronic submittal: https://ww2.arb.ca.gov/lispub/comm/bclist.php
Please note that under the California Public Records Act (Gov. Code § 7920 et seq.), your written and verbal comments, attachments, and associated contact information (e.g., your address, phone, email, etc.) become part of the public record and can be released to the public upon request.
Background
At its March 26, 2026 public hearing, CARB approved the permanent adoption of the Emergency Vehicle Emissions Regulations adopted via emergency rulemaking, which became effective on October 2, 2025. The Board approved for permanent adoption the proposed sections 1900, 1956.8, 1961.2, 1961.3, 1962.2, 1962.3, 1965, 1968.2, 1968.5, 1969, 1971.1, 1971.5, 1976, 1978, 2035, 2036, 2037, 2038, 2040, 2111, 2112, 2113, 2114, 2115, 2116, 2117, 2118, 2119, 2121, 2123, 2125, 2126, 2127, 2128, 2129, 2130, 2131, 2133, 2137, 2139, 2139.5, 2140, 2141, 2142, 2143, 2144, 2145, 2146, 2147, 2148, 2149, 2166, 2166.1, 2167, 2168, 2169, 2169.1, 2169.2, 2169.3, 2169.4, 2169.5, 2169.6, 2169.7, 2169.8, 2170, 2317, 2423, 2485, 2903, 1900.0.1, 1956.8.1, 1961.2.1, 1961.3.1, 1962.2.1, 1962.3.1, 1965.0.1, 1968.2.1, 1968.5.1, 1969.0.1, 1971.1.1, 1971.5.1, 1976.0.1, 1978.0.1, 2035.0.1, 2036.0.1, 2037.0.1, 2038.0.1, 2040.0.1, 2111.0.1, 2112.0.1, 2113.0.1, 2114.0.1, 2115.0.1, 2116.0.1, 2117.0.1, 2118.0.1, 2119.0.1, 2121.0.1, 2123.0.1, 2125.0.1, 2126.0.1, 2127.0.1, 2128.0.1, 2129.0.1, 2130.0.1, 2131.0.1, 2133.0.1, 2137.0.1, 2139.0.1, 2140.0.1, 2141.0.1, 2142.0.1, 2143.0.1, 2144.0.1, 2145.0.1, 2146.0.1, 2147.0.1, 2148.0.1, 2149.0.1, 2317.0.1, 2423.0.1, 2485.0.1, and 2903.0.1, Title 13, California Code of Regulations (CCR); sections 95300, 95301, 95302, 95303, 95304, 95305, 95306, 95307, 95308, 95309, 95310, 95311, 95312, 95660, 95661, 95662, 95663, 95664, 95300.0.1, 95301.0.1, 95302.0.1, 95303.0.1, 95304.0.1, 95305.0.1, 95306.0.1, 95307.0.1, 95308.0.1, 95309.0.1, 95310.0.1, 95311.0.1, 95312.0.1, 95660.0.1, 95661.0.1, 95662.0.1, 95663.0.1, and 95664.0.1, Title 17, CCR. The regulatory action confirmed that, until a court resolves the uncertainty created by the federal government’s actions, certain antecedent regulations (displaced by Advanced Clean Cars II and On-Road Heavy-Duty Engine and Vehicle Omnibus (Omnibus) regulations) remain operative (as previously adopted) with the caveat that CARB may enforce Advanced Clean Cars II and Omnibus regulations, to the extent permitted by law, in the event a court of law holds invalid the congressional resolutions purporting to disapprove the waivers for those regulations.
On April 3, 2026, CARB posted a Notice of Public Availability of Modified Text and Availability of Additional Documents and/or Information (First 15-Day Changes), with a 15-day public comment period which ended on April 20, 2026.
On June 30, 2026, CARB posted a Second Notice of Public Availability of Modified Text and Availability of Additional Documents and/or Information (Second 15-Day Changes), with a 15-day public comment period which ended on July 15, 2026.
CARB has determined that additional modifications are appropriate for the proposed amendments to correct inadvertent errors that were made in the Second 15-Day Changes. CARB has developed the proposed modifications (Third 15-Day Changes) as stated below in the "Summary of Proposed Modifications" section of this Third Notice of Public Availability of Modified Text (Notice). The Appendices showing the specific proposed modifications to the text of the proposed regulation being made with these Third 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.
Inquiries concerning the substance of the proposed regulation may be directed to Daniel Hawelti, Staff Air Pollution Specialist, On-Road Heavy-Duty Diesel Section, at (951) 542-3195 or daniel.hawelti@arb.ca.gov or (designated back-up contact) Mitzi Magtoto, Staff Air Pollution Specialist, On-Road Heavy-Duty Diesel Section, at (279) 208‑7363 or mitzi.magtoto@arb.ca.gov.
The resolution and all other regulatory documents for this rulemaking are available online at the following CARB website.
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