House panel weighs bills to modernize Clean Air Act mobile-source rules

Jun 3, 2026

A House committee hearing introduced 10 discussion drafts aimed at updating Title II of the Clean Air Act for mobile sources; the chair warned a proposed California locomotive standard and the waiver process could force nationwide changes that disrupt freight operations and impose steep costs on rail carriers.

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The chair opened a House committee hearing titled “Rules of the Road: Examining Legislation to Modernize the Clean Air Act's Mobile Source Requirements,” saying the session will consider 10 discussion drafts aimed at updating Title II of the Clean Air Act, which governs mobile sources. The chair framed the effort as an attempt to protect the environment without sacrificing economic growth.

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