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Deep & Emerging Tech·July 10, 2026·1 min read

EPA proposes ending DEF derates, easing heavy-duty truck requirements

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Relaxing DEF derate rules and easing requirements—while claiming $12B in savings—shifts some compliance burden off fleets and OEMs, at least temporarily. If you operate or serve heavy-duty fleets, re-run your TCO and retrofit assumptions; regulatory headwinds may ease faster than your product roadmap assumed.