# Air Quality Regulations (Northern Ireland) 2003, Paragraph 8: Interpretation

Extent: N.I.
Status: prospective

The reference to a number of micrograms or milligrams per cubic metre of a substance is a reference to the number of micrograms or milligrams per cubic metre of that substance when measured with the volume standardised at a temperature of 293K and at a pressure of 101.3 kPa.

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Source: https://www.legislation.gov.uk/nisr/2003/342/schedule/paragraph/8 (the official version)
Page: https://openlegislation.uk/air-quality-regulations-northern-ireland-2003/schedule/paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.