The Federal Trade Commission (FTC) has declared that an emissions agreement between California and four major truck makers is “unenforceable” — paving the way for noncompliance with the Golden State’s pollution rules, which are stricter than federal standards.

The FTC made this determination as the agency closed an investigation into whether several truck and engine manufacturers violated antitrust laws by engaging in a voluntary “Clean Truck Partnership” with the California Air Resources Board (CARB).

Truck manufacturers, in the July 2023 partnership, agreed to abide by California’s emissions standards in exchange for certain concessions.

Among those standards is the Advanced Clean Trucks rule, which requires 7.5 percent of heavy-duty vehicles to be emissions-free by 2035. The Omnibus

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