Passed House. Latest step, Apr 17, 2026: Received in the Senate and Read twice and referred to the Committee on Environment and Public Works. The House passed it 220–208.All 4 of Iowa's representatives voted yes in the House. It would change 2 sections of existing law.
How this bill changes the law
Sourced
H.R. 6409 would change 2 sections of existing law. Read from the bill text as sent to the Senate (Apr 17, 2026).
adds
changes words
removes or repeals
renumbers
Dashed lines: proposed, not law.
H.R. 6409Bill
Sec. 2(a)Clarification of emissions covered2 changes
Sec. 2(c)Applicability of sanctions and fees if emissions beyond control1 change
The bill says: by inserting "(regardless of whether such emissions result from human activity)" after "but for emissions emanating from outside of the United States" each place it appears; and
(d) Attainment of PM–10 levels. Notwithstanding any other provision of law, any State that establishes to the satisfaction of the Administrator that, with respect to a PM–10 nonattainment area in such State, such State would have attained the national ambient air quality standard for carbon monoxide by the applicable attainment date, but for emissions emanating from outside the United States (regardless of whether such emissions result from human activity), shall not be subject to the provisions of section 7513(b)(2) of this title.
The bill says: in subsection (d), by inserting "(regardless of whether such emissions result from human activity)" after "but for emissions emanating from outside the United States".
179C. Applicability of sanctions and fees if emissions beyond control.—(a) In general.— Notwithstanding any other provision of this Act, with respect to any nonattainment area that is classified under section 181 as a Severe Area or an Extreme Area for ozone or under section 188 as a Serious Area for particulate matter, no sanction or fee under section 179 or 185 shall apply with respect to a State (or an area or source therein) on the basis of a deficiency described in section 179(a), or the failure to attain a national ambient air quality standard for ozone or particulate matter by the applicable attainment date, if the State demonstrates that the State would have avoided such deficiency, or such standard would have been attained, but for one or more of the following:(1) Emissions emanating from outside the nonattainment area.(2) Emissions from an exceptional event (as defined in section 319(b)(1)).(3) Emissions from mobile sources to the extent the State demonstrates that—(A) such emissions are beyond the control of the State to reduce or eliminate; and(B) the State is fully implementing such measures as are within the authority of the State to control emissions from the mobile sources.(b) No effect on underlying standards.— The inapplicability of sanctions or fees with respect to a State (or an area or source therein) pursuant to subsection (a) does not affect the obligation of a State, area, source, or other entity under other provisions of this Act to establish and implement measures to attain a national ambient air quality standard for ozone or particulate matter.(c) Periodic renewal of demonstration.— For subsection (a) to continue to apply with respect to a State (or an area or source therein), the State involved shall renew the demonstration required by subsection (a) at least once every 5 years.
The bill says: The Clean Air Act (42 U.S.C. 7401 et seq.) is amended by inserting after section 179B the following new section:
From the bill's official text on GovInfo and the U.S. Code, 2024 edition, which may not yet show changes made since.
What it does
Sourced
Foreign Emissions and Nonattainment Clarification for Economic Stability Act or the FENCES Act
This bill modifies standards under the Clean Air Act to exempt states from penalties for emissions outside of the state’s control.
The bill provides that certain nonattainment areas (i.e., those classified as severe or extreme for ozone or as serious for particulate matter) are not subject to sanctions for implementation plan deficiencies or for fees for failing to attain national ambient air quality standards (NAAQS) if the state demonstrates it would have avoided deficiencies or attained its standards but for emissions outside of its control (e.g., emissions from an exceptional event like a wildfire). A state must renew its demonstration at least once every five years for exemption from the sanctions or fees to continue to apply.
The bill specifies that an area within a state may not be designated as a nonattainment area regarding any new or revised NAAQS for a pollutant if the state demonstrates it would be in attainment but for emissions emanating from outside of the country, regardless of whether the emissions resulted from human activity.
For purposes of approving a state implementation plan or meeting certain NAAQS, current law provides that a state may demonstrate to the Environmental Protection Agency that but for emissions emanating from outside of the country, it would have attained applicable NAAQS by the attainment date for certain pollutants. The bill specifies that such emissions emanating from outside the country may include emissions that result from human activity.
Official summary by the Congressional Research Service (Reported to House, Apr 9, 2026).
Our plain-language breakdown, with what it means for you and the case for and against, is written once a bill starts to move.
What has happened
Sourced
Apr 16, 2026Passed/agreed to in House: On passage Passed by the Yeas and Nays: 220 - 208 (Roll no. 116). Roll call recordLibrary of Congress
Apr 9, 2026Reported by the Committee on Energy and Commerce. H. Rept. 119-594.Library of Congress