The public record · 119th Congress

DEF Act

The Congressional Research Service has not published a summary of this measure.

Other titles

the names this measure carries besides the one at the top of this page, each with the record's own label for it. The collection includes titles given to parts of a bill as well as to the whole.

To amend the Clean Air Act to preserve regulatory stability for motor vehicles, motor vehicle engines, nonroad vehicles, and nonroad engines, and for other purposes.Official Title as Introduced

DEF ActShort Title(s) as Introduced

Diesel Engine Flexibility ActShort Title(s) as Introduced

Legislative history

H.R. 9618·House·Bill·Environmental Protection

Rep. Julie Fedorchak(Republican-North Dakota-0)·

Jul 9, 2026

IntroducedIntroduced in House

Jul 9, 2026

House · CommitteeReferred to the Subcommittee on Environment.

Jul 9, 2026

HouseReferred to the House Committee on Energy and Commerce.

Jul 14, 2026

House · CommitteeSubcommittee Consideration and Mark-up Session Held

Jul 14, 2026

House · CommitteeForwarded by Subcommittee to Full Committee by Voice Vote.

Documents

Everything Congress printed about this measure. A bill is reprinted each time it changes, the Congressional Research Service summarizes each version, and the committee that reports a bill files its own written account of it.

Bill text

Jul 9, 2026As introduced in the House