Article 16 3

3.   Where the Commission has been informed of an exceedance attributable to natural sources in accordance with paragraph 2, that exceedance shall not be considered as an exceedance for the purposes of this Directive. If the Commission considers that the evidence provided by a Member State is not sufficient, it shall inform that Member State that the exceedance is not considered to be attributable to natural sources until that Member State provides appropriate additional information.