On Nov. 18, 2026, the United States Court of Appeals for the Ninth Circuit issued a preliminary injunction enjoining the enforcement of California’s SB 261, which had an initial compliance deadline of Jan. 1, 2026. The same day, the California Air Resource Board (CARB) issued updated guidance concerning its rule-making efforts for both SB 253 and 261.
Ninth Circuit Pauses Looming California SB 261 Compliance Deadline; CARB Clarifies Related Guidance