2. For the specific purpose of assessing compliance with the limit values, target values, average exposure reduction obligations and critical levels, the information referred to in paragraph 1 of this Article shall be made available to the Commission no later than 9 months after the end of each calendar year and shall include:
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(a)
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the changes made in that year to the list and delimitation of zones or average exposure territorial units established under Article 6;
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(b)
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the list of zones and average exposure territorial units and the levels of pollutants assessed;
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(c)
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for zones in which the levels of one or more pollutants are higher than the limit values, target values or critical levels, as well as for average exposure territorial units where the levels of one or more pollutants are higher than the level determined by the average exposure reduction obligations:
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(i)
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the dates and periods when such levels were observed;
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(ii)
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if appropriate, an assessment on contributions from natural sources and from re-suspension of particulates following winter-sanding or winter-salting of roads to the levels assessed, as provided to the Commission under Articles 16 and 17.
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