Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions for SCR-Equipped Diesel Engines
EPA proposes amendments to compliance provisions and nonconformance penalties for MY2027+ heavy-duty engines, and changes to inducement requirements for SCR-equipped diesel engines.
Aforeworn detected this change in the Trucking / FMCSA Compliance space on July 14, 2026 and published this briefing so affected operators are forewarned rather than caught off guard. It is rated Low urgency. Trucking companies operating heavy-duty diesel trucks with SCR systems, especially those buying new trucks in 2027 or later. should confirm how it applies to their specific situation before acting. There is a time constraint attached: Comment period ends 60 days after publication (likely September 2026).. Acting after that point can mean penalties, a lapsed licence, or lost eligibility — exactly the kind of surprise Aforeworn exists to prevent. Aforeworn monitors Trucking / FMCSA Compliance continuously and turns every detected change into a plain-English briefing like this one, so you always know first. Forewarned is forearmed.
What changed
EPA is proposing new nonconformance penalties for engine emissions and amendments to inducement provisions (e.g., engine derate) for SCR-equipped diesel engines.
Who it affects
Trucking companies operating heavy-duty diesel trucks with SCR systems, especially those buying new trucks in 2027 or later.
What you must do
Monitor the rulemaking and comment by the deadline if desired; no immediate action required until final rule.
Deadline
Comment period ends 60 days after publication (likely September 2026).
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