Industry groups are suing the California Air Resources Board (CARB) for various reasons. Here is an update on those cases:
The US Supreme Court will hear the case brought forward by fuel producers on whether they have standing to bring a case against the Environmental Protection Agency (EPA) for issuing a waiver to CARB to set fuel standards.
The US Supreme Court declined to hear the case brought by 17 states against the constitutionality of the EPA for giving CARB a waiver to implement stricter emissions standards and, thereby, creating a de facto national standard.
The EPA granted CARB a waiver to implement its “Omnibus” low-NOx regulation. The regulation requires truck manufacturers to reduce NOx emission by 90%, create rigorous testing procedures and extend engine warranties. This regulation is different from the Advanced Clean Fleet (ACF) ruling which has not received a waiver.