On April 21, 2023, the Air Quality Control Commission (AQCC) adopted revisions to Regulation 20 which came into effect on June 14, 2023 and added the Advanced Clean Trucks regulation to Colorado (Part F of Regulation 20). ACT requires automotive manufacturers to sell an increasing percentage of zero emission heavy-duty vehicles based on their annual vehicle sales.
The ACT rule applies to model year 2027 and subsequent model year vehicles with a GVWR of 8,501 pounds or greater that are offered for sale or lease in Colorado.
Auto manufacturers will accrue annual deficits based on the number of heavy-duty vehicles delivered for sale in Colorado, and are required to balance those deficits by generating ZEV credits, starting in MY 2027. Manufacturers may begin earning credits in MY 2024, and may also buy and trade credits from other manufacturers to meet compliance goals.
ACT for Automakers
Beginning with the 2024 model year and no later than 90 days following the end of each model year, manufacturers that produce on-road vehicles over 8,500 lbs GVWR for sale in Colorado must submit a report through CARB’s ACT reporting system. If you have questions about using the reporting system, please consult CARB’s ACT reporting website.
If your report(s) contains confidential, proprietary, and/or trade secret information, please designate the reports as such through an email to cdphe_colevzev@state.co.us. Additionally in your email, please attach a redacted version of your report that may be made publicly available if requested. CDPHE staff will review your submission and reply with a confirmation letter if the material is accepted as confidential.