On August 27, 2026, Environmental Protection Network submitted formal comments opposing EPA’s proposed revisions to inducement provisions for SCR-equipped diesel engines, arguing that replacing engine performance derates with short-term audible and visual notifications would undermine Clean Air Act protections by making compliance with NOx emissions controls effectively voluntary.
EPN Comments on Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions for SCR-Equipped Diesel Engines
