Diesel Emissions Reduction Act of 2025

This section is the core of the bill, directly amending Section 797(a) of the Energy Policy Act of 2005. It specifically strikes the year "2024" and inserts "2029," thereby extending the authorization for the Diesel Emissions Reduction Act (DERA) program. This legislative change ensures that the program, which supports projects to reduce emissions from existing diesel engines, remains active and eligible for federal appropriations for an additional five years beyond its previous sunset date.