# The Air Quality Standards Regulations 2010, Paragraph 4


The documentation must be updated as necessary and reviewed at least every 5 years, to ensure that selection criteria, network design and monitoring site locations remain valid and optimal over time.

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Source: https://www.legislation.gov.uk/uksi/2010/1001/schedule/1/paragraph/4n1 (the official version)
Page: https://openlegislation.uk/air-quality-standards-regulations-2010/schedule-1/paragraph-4n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.