News & Analysis as of

Greenhouse Gas Emissions California Preemption

Jones Day

Both Convergence and Divergence Seen in Emerging State Climate Disclosure Bills

Jones Day on

Although the federal Securities and Exchange Commission has stayed its 2024 climate-related disclosure rule, certain U.S. states continue to advance their own climate-related disclosure legislation. California's landmark...more

Jones Day

Active Battle Over the California Clean Air Act Waiver Continues

Jones Day on

California's ability to set its own vehicle emission standards under its Clean Air Act waiver of federal preemption is in jeopardy given three joint congressional resolutions signed into law by President Trump on June 12,...more

Cozen O'Connor

Republican AGs Support End of California Vehicle Emission Regulations

Cozen O'Connor on

Iowa AG Brenna Bird led a group of 26 Republican AGs in filing two amici curiae briefs urging the dismissal of pending challenges to Environmental Protection Agency waivers allowing California to enforce its own vehicle...more

Morrison & Foerster LLP

Federal Court Declines to Enjoin California Climate Disclosure Laws

On August 13, 2025, the U.S. District Court for the Central District of California declined to enjoin California’s two major climate disclosure bills, the Climate Corporate Data Accountability Act (SB 253) and the...more

Allen Matkins

California Environmental Law & Policy Update 8.15.25

Allen Matkins on

A group of truck manufacturers filed a lawsuit on August 11 against California regulators contending that the state lacks the authority to enforce its heavy-duty vehicle emissions standards, which are stricter than federal...more

Baker Donelson

Endangerment Finding Reconsidered as Clean Air Waivers Are Targeted

Baker Donelson on

California's unique ability to set its own vehicle emissions standards under Section 209(b) of the Clean Air Act (CAA) is facing unprecedented legal and political challenges. At the center of the controversy is Congress's...more

Holland & Knight LLP

Up in the Air: Congress Nullifies Clean Air Act Waivers for California

Holland & Knight LLP on

In the weeks since Holland & Knight previously reported on challenges to California's Clean Air Act (CAA) preemption waivers on April 30, 2025, Congress has taken decisive action. Following the U.S. House of Representatives'...more

Blank Rome LLP

SCOTUS Declines to Review California’s Clean Air Act Preemption Waiver—Current Implications and Expected Response from the...

Blank Rome LLP on

Update and Background - The U.S. Supreme Court, in Diamond Alternative Energy, LLC v. EPA, et al, recently declined to review whether the Environmental Protection Agency (“EPA”) exceeded its authority by granting a...more

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