CARB Climate Disclosure Rules Approved, Effective Ahead of Nov. 10 Deadline
California regulators approved CARB's initial climate disclosure rules effective October 12, 2026, putting the first annual Scope 1 and Scope 2 greenhouse gas reporting deadline of November 10, 2026 within weeks for in-scope companies.
Per this cluster's single source, a Proskauer Rose client alert, the California Office of Administrative Law approved the California Air Resources Board's initial climate disclosure regulations on October 12, 2026, with the rules effective immediately. Those rules govern the first annual Scope 1 and Scope 2 greenhouse gas reporting, with a November 10, 2026 reporting deadline identified in the source.
Why sophisticated counsel should care: this is the operative state-law analogue to California's SB 253/SB 261 disclosure framework and one of the first binding US corporate GHG reporting regimes to clear formal rulemaking. For asset-heavy, real-estate-exposed, supply-chain-heavy and private-equity-backed issuers and portfolio companies alike, the practical questions — entity-level scope and revenue thresholds, consolidated versus equity-share reporting, assured versus unassured data, and how CARB reporting interfaces with investor and lender demands and with federal SEC climate rulemaking — turn on the final text, transition relief and any litigation that follows approval.
Concrete next step: in-scope entities should map reporting entities and underlying emissions data now, and track whether the rules are challenged or modified before November 10, 2026. Note the cluster contains one secondary summary only; deadlines, scope criteria and transition terms should be verified against the approved regulation text.