Article 2

For the purposes of this Directive: - "limit value" means the concentration of nitrogen dioxide as defined in the table in Annex I which must not be exceeded throughout the territory of the Member States during specified periods and under the conditions laid down in the following Articles, "guide values" means the concentrations of nitrogen dioxide as given in Annex II considered over specified periods and intended, in particular, to serve as reference points for the establishment of specific schemes within zones determined by the Member States.

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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.