# The Air Quality Standards (Wales) Regulations 2007, Regulation 18: Measurement of ozone precursor substances


(1) The National Assembly must, in accordance with paragraph (2), install and operate one or, if it considers it necessary, more measuring stations to supply data on concentrations of those ozone precursor substances set out in Schedule 10.
(2) The National Assembly must have regard to Schedule 10 in choosing the number and sites of measuring stations and their operation.

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Source: https://www.legislation.gov.uk/wsi/2007/717/regulation/18 (the official version)
Page: https://openlegislation.uk/air-quality-standards-wales-regulations-2007/regulation-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.