4.

The Commission shall adopt measures for the implementation of this Article including measures in relation to the following: tailpipe emissions, including test cycles, the use of portable emissions measurement systems for verifying the actual in-use emissions, verifying and limiting off-cycle emissions, the setting of limits for particle numbers while retaining the existing ambitious environmental requirements, and emissions at idling speed; crankcase emissions; OBD systems and in-service performance of pollution control devices; durability of pollution control devices, replacement pollution control devices, conformity of in-service engines and vehicles, conformity of production and roadworthiness; CO_(2) emissions and fuel consumption; granting extension of type-approvals; test equipment; reference fuels such as petrol, diesel, gaseous fuels and biofuels, such as bioethanol, biodiesel and biogas; measurement of engine power; correct functioning and regeneration of pollution control devices; specific provisions to ensure the correct operation of NO_(x) control measures; such provisions shall ensure that vehicles cannot be operated if the NO_(x) control measures are inoperative due, for example, to lack of any required reagent, incorrect exhaust gas recirculation (EGR) flow or deactivation of EGR. Those measures, designed to amend non-essential elements of this Regulation, inter alia, by supplementing it, shall be adopted in accordance with the regulatory procedure with scrutiny referred to in Article 13(2).

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Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.