Overview of H.R. 1 and Its Impact on Emission Programs
H.R. 1, dubbed President Trump’s “One Big Beautiful Bill,” focuses mainly on funding electric vehicles (EVs) while also targeting efforts to reduce clean diesel emissions. Specifically, Section 42104 eliminates the Diesel Emissions Reduction Program (DERA), outlined in Section 60104 of the Inflation Reduction Act. This program, administered by the EPA, provided financial assistance to fleets for retrofitting or replacing older diesel trucks. The repeal of DERA could significantly impact state programs that depend on this funding, likely creating a cascade of effects on local efforts to comply with emission standards.
Consequences for Local Pollution Mitigation Efforts
Furthermore, the legislation nullifies resources from the Inflation Reduction Act that were designated for emission reduction initiatives near freight routes, schools, and ports (Sections 42105–42108). The loss of this funding may hinder attempts to reduce localized diesel pollution, increasing pressure on municipalities and, by extension, fleets to address air quality issues.
Impact of Regulatory Rollbacks on Diesel Emission Standards
One of the most significant changes stemming from the bill is found in Section 42201, which repeals EPA standards for greenhouse gas and multi-pollutant emissions. These standards included long-term limits aimed at preventing excessive emissions from 2027 model year heavy-duty engines, particularly concerning nitrogen oxides (NOx) and particulate matter. While manufacturers and fleets may find temporary relief from this repeal, it creates uncertainty for those who have already invested in technologies designed to comply with upcoming regulations.
Details on Repealed Rules
The legislation specifies that the final rules issued by the EPA concerning “Revised 2023 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions Standards” (86 Fed. Reg. 74434, Dec. 30, 2021) and “Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles” (89 Fed. Reg. 27842, April 18, 2024) will no longer be in effect.
Changes to CAFE Standards
Additionally, Section 42301 repeals the National Highway Traffic Safety Administration (NHTSA) regulations regarding Corporate Average Fuel Economy (CAFE) Standards. The law states that the final rules concerning “Corporate Average Fuel Economy Standards for Model Years 2024–2026 Passenger Cars and Light Trucks” (87 Fed. Reg. 25710, May 2, 2022) and “Standards for Model Years 2027 and Beyond” (89 Fed. Reg. 52540, June 24, 2024) will also have no force or effect. It is important to highlight that these rules do not pertain to heavy-duty Class 7–8 trucks but rather to light and medium-duty vehicles, including some commercial diesels.
Reporting Requirements under Review
Another notable aspect is outlined in Section 42111, which eliminates funding for corporate greenhouse gas reporting. Although this change won’t directly alter emissions regulations, it may lessen the compliance burden for larger fleets that were starting to track and report their carbon emissions.
For more information on how the One Big Beautiful Bill affects electric trucks, click here.
