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art_9__para_5

5. Nitrogen dioxide shall be measured at a minimum of 50 % of the ozone sampling points required under Point A, Table 2, of Annex III. That measurement shall be continuous, except at rural background locations, as referred to in Point B of Annex IV, where other measurement methods may be used.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-16 · Text as adopted (Official Journal); later amendments are not incorporated in this text.