California Air Resources Board

Linked below are the list of current devices and combinations granted preliminary approval in accordance with the methodology described in title 40, Code of Federal Regulations (CFR), § 1037.526, as it existed on October 25, 2016, which was incorporated by reference in the “California Greenhouse Gas Exhaust Emission Standards and Test Procedures for 2014 and subsequent Model Heavy-Duty Vehicles,” adopted October 21, 2014, as last amended June 27, 2019, as incorporated by reference in section 95663(d), title 17, California Code of Regulations.