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The Air Quality Standards (Wales) Regulations 2007

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Maintenance of air quality standards

10.—(1) This regulation applies in respect of each zone in which concentrations of—

(a)one or more Group A pollutants are below the relevant limit values;

(b)one or more Group B pollutants are below the relevant target values; or

(c)ozone meet the long-term objectives.

(2) Where sub-paragraph (a) or (b) of paragraph (1) applies, the National Assembly must, in respect of each pollutant meeting the conditions set out in those sub-paragraphs, maintain compliance with the relevant limit or target values and endeavour to preserve the lowest concentration which it considers to be compatible with sustainable development.

(3) Where paragraph (1)(c) applies, the National Assembly must—

(a)ensure that concentrations are kept at or below the long-term objectives, insofar as the transboundary nature of ozone pollution, meteorological conditions and any other similar factors permit; and

(b)preserve through proportionate measures the lowest concentrations of ozone which it considers to be compatible with sustainable development and a high level of protection for the environment and human health.

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