rec_13
(13) In order to ensure that emissions of ultra fine particulate matter (PM 0,1 µm and below) are controlled, the Commission should adopt as soon as possible, and introduce at the latest upon entry into force of the Euro 6 stage, a number based approach to emissions of PM in addition to the mass based approach which is currently used. The number based approach to emissions of PM should draw on the results of the UN/ECE's Particulate Measurement Programme (PMP) and be consistent with the existing ambitious objectives for the environment.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.