The State and NGOs seek to defend an emissions rule that trucking and airline trade groups are challenging in federal court.

On October 13, 2021, the State of California, on behalf of the Office of the Attorney General and the California Air Resources Board (CARB, and together, the State), filed a motion to intervene in a federal lawsuit challenging the South Coast Air Quality Management District (SCAQMD or the District) adoption of Rule 2305. Rule 2305 is the Warehouse Indirect Source Rule (ISR) - Warehouse Actions and Investments to Reduce Emissions (WAIRE) Program. Plaintiff, the California Trucking Association (CTA), filed a complaint in the US District Court for the Central District of California on August 5, 2021, to which the District filed an answer on October 7, 2021. In addition to the State, Airlines for America filed a motion to intervene as a proposed plaintiff, while a group of environmental NGOs seek to intervene as proposed defendants. Each proposed intervenor is discussed further below.