A bill to amend sections 111, 169, and 171 of the Clean Air Act to clarify when a physical change in, or change in the method of operation of, a stationary source constitutes a modification or construction, and for other purposes.

This bill would change parts of the Clean Air Act to make it clearer what counts as a "modification" or new "construction" when a factory, power plant, or other fixed pollution source makes physical changes or changes how it operates. No official summary is available for this bill.

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