CARB’s emergency vehicle emissions rulemaking page indicates the Office of Administrative Law (OAL) approved the first readoption of the emergency vehicle emissions regulations and that the readoption was filed with the Secretary of State on March 26, 2026. CARB states the readopted emergency regulations become effective April 1, 2026 and will expire July 1, 2026. Compliance teams impacted by these emergency vehicle emissions provisions should account for the operative window through July 1, 2026 and monitor subsequent readoptions or permanent rulemaking.
OAL approved the first readoption of the emergency vehicle emissions rulemaking on March 26, 2026. The readoption became effective April 1, 2026 and will expire July 1, 2026. This emergency rulemaking addresses vehicle emissions regulations during the interim period while permanent adoption is under consideration.
The California Air Resources Board (CARB) approved amendments to the Advanced Clean Trucks (ACT) regulation and Zero-Emission Powertrain (ZEP) Certification standards. The amendments provide flexibility for manufacturers in meeting zero-emission truck sales requirements while maintaining emissions benefits. The ACT regulation requires truck manufacturers to sell zero-emission vehicles as an increasing percentage of their California sales, and ZEP Certification establishes standards for zero-emission powertrain certification.
CARB posted the recorded webcast from the February 27, 2026 Tier 5 Off-Road Diesel Engine Emission Standards workshop and issued minor errata to the workshop slide decks. The Tier 5 rulemaking will establish new NOx and PM emission standards for off-road compression-ignition engines. Equipment manufacturers and fleet operators should review the workshop materials and provide comments during the ongoing rulemaking process.
CARB’s Tier 5 program updates page reflects newly posted draft rulemaking materials (including draft regulation order and draft test procedures) and later postings such as a recorded webcast and errata to presentation materials. While not a final legal change, these postings signal evolution of draft requirements and test procedures; manufacturers and regulated parties tracking off-road engine/vehicle emissions standards should review updates for potential future compliance impacts and prepare technical comments when opportunities open.
The California Air Resources Board approved the California Greenhouse Gas Reporting and Climate Financial Risk Disclosure Initial Regulation implementing Senate Bills 253 and 261 (as amended by SB 219). The regulation establishes the administration and implementation fees for the Climate Corporate Data Accountability Act (SB 253) and the Climate-Related Financial Risk Act (SB 261). Key requirements include an August 10, 2026 initial reporting deadline for Scope 1 and Scope 2 emissions under SB 253, with Scope 3 reporting deferred to later years. Annual flat fees will be implemented with fee notices issued by September 10 each year starting in 2026. Entity thresholds are U.S. entities with over $1 billion annual revenue (SB 253) and over $500 million (SB 261) doing business in California. Tax-exempt nonprofits, government entities, and insurance companies are exempt. CARB will use enforcement discretion for good-faith first-year submissions. SB 261 enforcement is currently stayed pending Ninth Circuit litigation.
CARB posted draft potential Tier 5 Regulation Order, Tier 4 In-Use Compliance Test Procedures, and Tier 5 Test Procedures on February 5, 2026. A public workshop was held on February 27, 2026. The Tier 5 standards would establish new criteria pollutant and CO2 emission standards for off-road diesel engines.
CARB increased the Clean Truck Check (Heavy-Duty Inspection and Maintenance) compliance fee to $32.13, effective January 1, 2026. The fee increase accounts for consumer price index adjustments as authorized by Senate Bill 210 (Leyva, Chapter 298, Statutes of 2019). The fee applies to almost all non-gasoline heavy-duty vehicles subject to the Clean Truck Check program. Vehicle owners must pay the updated fee for compliance deadlines on and after January 1, 2026.
CARB announced an increase to the Clean Truck Check annual compliance fee used to satisfy requirements for vehicle compliance deadlines on and after January 1, 2026. Regulated fleet owners/operators should update budgeting and payment processes to reflect the updated fee for 2026 compliance cycles.
CARB reached a $525,000 settlement with Greif US Plastics LLC (formerly TPG Plastics LLC), a portable fuel container manufacturer based in Murray, Kentucky, for violations of CARB's Portable Fuel Containers and Spill-Proof Spouts Regulation. The settlement addresses compliance failures related to portable fuel container requirements.
CPPA published the text of regulations for data broker registration and the accessible deletion mechanism (DROP). The materials are posted as effective 01/01/2026 and operationalize data broker compliance obligations that have downstream vendor/service-provider implications (e.g., deletion request processing workflows and related governance). Compliance teams that operate as data brokers or manage data-broker vendors should ensure processes and contractual flow-downs support required deletion handling and related operational duties tied to the DROP mechanism.
CPPA posted the Delete Act statute text indicating it is effective 01/01/2026 and reflects an SB 361 update (as described in the document header). The statute establishes/updates legal obligations for the data broker registry and deletion mechanism framework that can impact vendor privacy governance through service provider/contractor flow-down handling of deletion requests and related compliance operations.
CARB announced it will not enforce Health and Safety Code section 38533 against covered entities for failing to post and submit climate-related financial risk reports by the January 1, 2026 statutory deadline, pursuant to a Ninth Circuit Court order. SB 261 applies to entities with over $500 million annual revenue doing business in California. CARB issued an enforcement advisory and is accepting voluntary report submissions.
CARB announced a public hearing on November 20, 2025 to consider proposed amendments to the Regulation on Methane Emissions from Municipal Solid Waste Landfills (LMR). The hearing provides opportunity for stakeholder input on proposed changes to the landfill methane regulatory requirements.
CARB reached a $12,500,000 settlement with ZIM Integrated Shipping Services Ltd. for violations of CARB's Airborne Toxic Control Measure for vessel fuel requirements. The settlement, processed through ZIM's agent ZIM American Integrated Shipping Services Co. LLC, represents a significant enforcement action for marine vessel fuel compliance in California waters.
CARB published guidance for the 2025 Advanced Clean Fleets amendments, which provide increased flexibility for state and local government fleets. The guidance clarifies that CARB will emphasize education and outreach during the first reporting cycles of implementation, work with agencies on a case-by-case basis to address compliance issues, and evaluate how effectively the new flexibilities address implementation concerns. Fleet managers should use this guidance to understand compliance pathways and available flexibilities.
CARB issued implementation guidance for State and Local Government fleets subject to the Advanced Clean Fleets regulation following 2025 amendments. The guidance emphasizes education and outreach during initial reporting cycles, with CARB focusing on helping agencies understand reporting requirements, improved flexibility provisions, and exemption processes. CARB intends to work with agencies on a case-by-case basis to address implementation concerns and will apply lessons learned to evaluate future regulatory modifications.
CARB extended the 2023 Consumer and Commercial Products Survey reporting deadline from April 8, 2025 to September 22, 2025. The survey covers 37 product categories and was launched December 3, 2024. Companies required to report under the Consumer Products Program must submit survey data by the new deadline. A webinar announcement and list of non-respondent companies were issued August 19, 2025.
The California Air Resources Board extended the 2023 Consumer and Commercial Products Survey reporting deadline from April 8, 2025 to September 22, 2025. The survey covers 37 product categories and was launched on December 3, 2024. Companies subject to the survey requirements must report by the extended deadline.
CARB published an Implementation FAQ for the 2025 Low Carbon Fuel Standard amendments effective July 1, 2025. The guidance addresses dual 2025 CI benchmarks (pre-amendment for Q1-Q2, amended for Q3-Q4), credit true-up provisions starting with 2025 data year, CI exceedance deficit obligations with 4x penalty, and new sustainability requirements including attestation letters for biomass (2026 data year) and geographical shapefiles for biomass contracted after July 1, 2025.