Federal Regulators Challenge California Rules

US Capitol building dome and steps — Photo: Framalicious / Shutterstock

Federal banking regulators warned that California’s new climate-disclosure rules could clash with national law and upend basic banking for customers across the country.

Story Highlights

The Office of the Comptroller of the Currency asked California to exclude federally chartered banks from two climate-disclosure laws.
California Air Resources Board materials describe wide coverage that includes large U.S. companies doing business in the state, reaching banking and finance.
The dispute turns on whether state reporting demands interfere with federally protected banking powers.
Both sides signal more guidance or a legal showdown if no compromise emerges.

What sparked the clash between federal bank regulators and California

The Office of the Comptroller of the Currency, a federal bank regulator, sent a letter to the California Air Resources Board on October 29. The agency asked California to exempt national banks and federal savings associations from two climate-disclosure laws or to state clearly that they do not apply. The letter argued that the rules pose legal and policy problems for banks chartered under federal law. The request sets up a classic state versus federal authority test.

California’s materials show a different view. Workshop slides describe the law as covering United States entities with more than one billion dollars in revenue that do business in the state. The listed sectors include banking, insurance, asset management, and other finance activities. Those documents do not single out a carve-out for national banks or federal savings associations. The reach looks broad and tied to revenue and presence in California.

How California’s rules would capture big financial firms

California’s presentations on the greenhouse-gas reporting program define a “reporting entity” by formation in the United States, revenue size, and California business activity. The description includes banks and other financial firms among covered sectors. The framework points to climate-risk and emissions reports for large companies that operate in the state. The approach treats finance like any other large industry that does business in California, without listing bank charter status as a limit.

Separate materials outline proposed reporting tracks. One requires corporate greenhouse-gas emissions reporting for entities over one billion dollars in revenue. Another requires climate-related financial risk reporting for entities over five hundred million dollars in revenue. Both apply to United States entities that do business in California. Together, they show a broad compliance net by revenue and presence, not by industry exemption for banks.

Why federal preemption is now front and center

The federal agency’s letter leans on long-standing court doctrine. The Supreme Court has said federal law can preempt state rules that prevent or significantly interfere with national bank powers. That line runs through cases like Barnett Bank v. Nelson. The question here is whether California’s disclosure demands cross that line by burdening core banking functions, customer relationships, or safety and soundness. If they do, federal law may block the state rules for national banks.

California can argue the laws are general business reporting duties. The rules apply to many large firms across sectors, not just banks. States often set corporate reporting and consumer rules that reach banks without regulating banking powers directly. That tension is common in the “dual banking” system. When push comes to shove, courts ask if the state rule targets or hampers banking, or if it is only a background duty any large company can meet.

What this means for customers, companies, and the next steps

If national banks must meet California’s climate reports, they could face new data, audit, and vendor costs. Banks might pass costs to customers or limit products tied to California. If federal preemption holds, the largest banks could skip the state rules, while state-chartered banks and nonbanks still comply. That mix could skew competition and confuse users who expect one set of disclosures from their finance providers.

The @USOCC just told California that two of its climate disclosure laws should not reach national banks.

In a letter to @AirResources, Comptroller Jonathan Gould (@USComptroller) argued the laws would be "inconsistent with OCC regulation and safety and soundness" and would… https://t.co/f09GsqGAsT

— Chris Nobili (@chrisnobili) October 30, 2026

Both sides have options. California can clarify scope, phase reporting, or grant targeted relief. The federal regulator can issue preemption guidance or move toward a formal determination. Lawsuits could follow if either path leaves major firms exposed. For many readers, this fight echoes a broader worry: large rules set far from home can raise prices and reduce choice, while still failing to solve the core problem they aim to fix.