Editorial purpose
DieselMandate.com documents the legal, mechanical, economic and national-security case for repealing or fundamentally revising federal diesel-emissions mandates. Advocacy does not permit factual inaccuracy. Every factual claim must be traceable to Rob Carpenter's reporting or a primary government, court, legislative or regulatory source.
Source standard
Primary federal, court and legislative records receive priority: United States Code, the Code of Federal Regulations, the Federal Register, EPA rulemaking and enforcement records, filed indictments, plea agreements, judgments, sentencing records, consent decrees, presidential clemency warrants, congressional records, GAO and SBA filings.
Rob Carpenter's published reporting is used to organize and interpret the primary record. Wikipedia is not a final cited source; AI output is not cited.
Legal-status standard
Criminal conviction, presidential pardon, civil settlement, consent decree and federal disqualification are treated as separate legal events. A pardon of one defendant does not terminate a civil consent decree governing a different party. A change in Department of Justice prosecutorial policy is not a repeal of the underlying statute.
Where a legal status has not been independently verified against a primary source, this site displaysAwaiting primary-source verificationrather than a guess.
Corrections
Material factual corrections are dated and preserved.
Development-data correction · 2026-07-10
Kory Willis pardon status
An earlier development version of this website incorrectly described Kory Willis as pardoned. Willis was not included in the identified diesel-emissions pardon group. The record has been corrected to distinguish his criminal conviction from the separate civil consent decree governing PPEI covered products, inventory, technical support, warranties, marketing, customer notices, training and associated intellectual property. The consent decree was not automatically terminated by any other person's pardon or by a change in DOJ prosecutorial policy.
Contact
Editor: Rob Carpenter. Send corrections, tips and document submissions to robreportnews@pm.me.
Why we cite sources that support the Clean Air Act
An advocacy site that only cites the strongest arguments on its own side is not a factual record. The research library deliberately includes the leading scholarly synthesis supporting the Act, EPA's own cost-benefit study, the environmental movement's strongest published case and the agency's plain-English explainer. The diesel argument on this site must be able to be tested against them.