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Introduced on May 5, 2025 by John Moolenaar
This bill would change the Clean Air Act so that states cannot set their own emissions rules for existing locomotives or their engines. Instead, there would be one national standard. It adds locomotives engaged in commerce (like common carrier railroads) to the list of engines where state rules are preempted by federal law.
In plain terms, rail companies would follow the same federal emissions rules across all states. States and local air agencies would no longer be able to require stricter standards for currently operating locomotives or their engines.
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