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CARB withdraws Advanced Clean Fleets bid

Jan. 15, 2025
California is no longer seeking to enforce ACF, which would have required fleets to phase in ZEVs. The state is withdrawing its bid for an EPA waiver just days before Donald Trump takes office.

The California Air Resources Board withdrew its request for an EPA waiver to enforce its Advanced Clean Fleets rule. The withdrawal means CARB is now no longer seeking to enforce ACF.

The move comes just days before President-elect Donald Trump is sworn in for a second term on January 20.

On Monday, CARB’s executive officer, Steven Cliff, signed a letter to EPA’s acting administrator announcing the withdrawal.

See also: Here's what another Trump presidency means for trucking

Why revoke the request?

CARB withdrew its waiver request as part of its preparation for strife with the incoming president. After taking to the White House, Trump is expected to deny any pending CARB waivers.

Trump promised to combat emissions regulations during his campaign. "I will end the electric vehicle mandate on day one," Trump said at the Republican National Convention in July.

In his first term, Trump went so far as to revoke a CARB waiver.

California politicians also expect to bump heads with the Trump administration. Legislators convened a special session in December to prepare for conflict with the next president.

Trump's EPA nominee, Lee Zeldin, is also positioned to "ensure fair and swift deregulatory decisions," according to Trump.

In a voice of support for Zeldin, whose confirmation hearing is scheduled for later this week, the American Trucking Associations threw its support behind the former congressman and argued that the current U.S. EPA set the trucking industry up for failure by imposing unworkable mandates on unrealistic timelines.

“America’s truckers deserve an EPA leader who will work productively with industry to set federal emissions standards that are achievable and do not risk disrupting our supply chains,” ATA CEO Chris Spear wrote in a letter of support. “Unfortunately, the current EPA failed to meet those thresholds and instead consistently conceded its federal responsibilities to the California Air Resources Board, creating a patchwork of state mandates and timelines for emissions reduction and forced electrification of heavy-duty trucking. We believe that under Rep. Zeldin’s leadership, the EPA can restore common sense to environmental policies, providing a national roadmap that is both ambitious and achievable.”

According to ATA, the industry has made big strides in reducing emissions this century, noting that it would take 60 modern heavy-duty trucks to emit as much carbon as one truck built in 1988. Trucking has generally supported the first two Greenhouse Gas Phases, participated in EPA’s voluntary SmartWay program, and continues to focus on making operations more efficient as trucking mpg rates have risen

Behind the waiver process

Under the Clean Air Act, California has the unique freedom to set its own emissions standards that exceed EPA's. CARB needs a waiver from EPA before it can enforce the regulations. States can choose to adopt the regulations that CARB sets.

See also: Fleets Explained: Emissions regulations

ACF is a controversial zero-emission vehicle mandate directly targeting fleets. The regulation requires certain fleets to phase-in ZEVs and, by 2036, requires manufacturers to only manufacture ZEV trucks. It is the only remaining major heavy-duty emissions regulation that CARB did not receive an EPA waiver for. The other two recent heavy-duty CARB regulations, Advanced Clean Trucks and Omnibus, already received waivers.

About the Author

Jeremy Wolfe | Editor

Editor Jeremy Wolfe joined the FleetOwner team in February 2024. He graduated from the University of Wisconsin-Stevens Point with majors in English and Philosophy. He previously served as Editor for Endeavor Business Media's Water Group publications.

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