Summary: Advanced Clean Fleets Regulation
For Public Agencies
RTC 23-136, July 18, 2023 1 of 2
Regulated Entities and Vehicles
The Advanced Clean Fleet (ACF) regulation applies to fleets owned by State, local, and federal government agencies. The regulation affects medium- and heavy-duty on-road vehicles with a gross vehicle weight rating greater than 8,500 pounds, off-road yard tractors, and light-duty mail and package delivery vehicles.
Individual departments and divisions under the same agency’s jurisdiction have the option to comply jointly instead of complying independently.
Public Fleets Rules and Deadlines
There are two compliance options for public fleets:
Purchase Requirement: 50 percent of vehicle purchases must be zero-emission beginning January 1, 2024, and 100 percent of vehicle purchases must be zero-emission beginning January 1, 2027.
o Near-zero emission vehicles (NZEVs) are considered zero-emission vehicles (ZEVs) through the 2035 model year.
o Early and excess purchases can count toward future requirements. o Delayed compliance:
Fleets with at least 90% of its service area in a low-population county are not required to make ZEV purchases until 2027.
Small government fleets (those with 10 or fewer vehicles) are not required to make ZEV purchases until 2027.
ZEV Milestone: Up until January 1, 2030, public fleets may alternatively opt into the ZEV milestone compliance pathway. Beginning January 1, 2025, fleet owners must continuously meet or exceed the ZEV Fleet Milestone percentage requirements set forth below.
Summary: Advanced Clean Fleets Regulation
For Public Agencies
RTC 23-136, July 18, 2023 2 of 2
Exemptions
The purchase of an internal combustion engine is allowed under the following exemptions:
Mutual Aid – for up to 25% of the fleet
ZEV Unavailability
Daily Usage
Non-repairable Vehicles
ZEV Infrastructure Delay
Snow Equipment:
o Dedicated snow removal vehicles.
o Until 2030, intermittent snow vehicles that are equipped with a snow plow or snow blower mounting attachment and a control system for the plow or blower.
Exemption requests must be submitted to CARB, and the Executive Officer will notify the fleet owner by email whether the exemption has been approved within 45 calendar days from the date a complete application is received. If the Executive Officer does not respond to within this timeframe, the exemption will be deemed approved.
Reporting
Fleet owners must submit an annual report by April 1 of each year, beginning on April 1, 2024.
Annual reports include:
Agency information, designated contacts, and whether the fleet is opting in to the ZEV milestone pathway.
Vehicle information for each vehicle in the fleet as of January 1 of that year.
Vehicles added or permanently removed must be additionally reported within 30 calendar days of such action. This applies to both ZEV and International Combustion Engine (ICE) vehicles.