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119-hr-9618Committee
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DEF Act

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Summary

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The DEF Act amends the Clean Air Act to establish a 10-year regulatory freeze on vehicle and engine emission standards for on-road and nonroad diesel engines, preventing the EPA from promulgating standards more stringent than 2007 and 2010 standards during this period. The bill creates a safe harbor for manufacturers implementing inducement strategies and diesel exhaust fluid monitoring consistent with specified EPA guidance documents. After the 10-year period expires, any new emission standards must provide at least 5 years of lead time before taking effect and must consider factors including operational disruption, equipment durability, resale value, and cost impacts on owners and operators.

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Bill details

Congress
119
Bill type
hr
Introduced
July 9, 2026
Sponsor
Julie FedorchakRND
Cosponsors
4
Last action
July 14, 2026— Forwarded by Subcommittee to Full Committee by Voice Vote.

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