# The Air Quality Standards (Wales) Regulations 2007, Paragraph 7


Details of those measures or projects for improvements which existed prior to 21 November 1996—
(a) local, regional, national and international measures; and
(b) observed effects of these measures.

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Source: https://www.legislation.gov.uk/wsi/2007/717/schedule/2/paragraph/7 (the official version)
Page: https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-2/paragraph-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.