anx_II__para__35
3.7.2. At the time of type-approval, the manufacturer may choose to measure at the same time the pollutant emissions before any exhaust aftertreatment system. In so doing, the manufacturer may develop an informal deterioration factor separately for the engine and the aftertreatment system that may be used by the manufacturer as an aid to end of production line auditing.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.