California Air Resources Board

The ACF Regulation (California Code of Regulations, Title 13, Sections 2013, 2013.1, 2013.2, 2013.3, 2013.4, and 2016) is the latest development in CARB’s decades‑long history of reducing emissions from mobile sources that are needed to protect the public health and welfare of Californians by simultaneously improving air quality and by mitigating the harms posed by greenhouse gases by helping advance the introduction of zero-emission technologies into California’s truck and bus fleets. Achieving these and other milestones will contribute to meeting the goals in the Governor’s Executive Order N-79-20 and result in cleaner, more healthful air for all Californians.

Achieving California’s long-term air quality, climate, and public health goals will require medium- and heavy-duty vehicles to significantly reduce their emissions, by embracing commercially available zero-emission technologies where feasible, and by using near-zero-emission technologies powered by clean, low‑carbon renewable fuels everywhere else. Promoting the development and use of zero-emission trucks will contribute to the goals set by the Governor’s Executive Order N-79-20 and the Sustainable Freight Action Plan, and will help achieve emission reductions as outlined in the State Implementation Plan, Senate Bill (SB) 350 (de León, Chapter 547, Statutes of 2015), Assembly Bill 32 (Nuñez, Chapter 488, Statutes of 2006), and SB 32 (Pavley, Chapter 249, Statutes of 2016), and Assembly Bill 1279. The ACF regulation is an important part of California’s broader strategy to increase clean, affordable transportation options such as zero-emission technologies, innovative methods to improve freight activity, and transportation system efficiency in California.