# The Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020, Regulation 3: Interpretation: Part 2


In this Part—
“approved wood certification body” means a person appointed by the Secretary of State under regulation 5;
“prohibited level”, in respect of a relevant unit of wood, means a moisture content of more than 20%;
“relevant unit of wood” means wood that is supplied—
(a) for the purposes of combustion in domestic premises in England;
(b) in a unit, whether comprising one piece of wood or more, the volume of which is less than two cubic metres.

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Source: https://www.legislation.gov.uk/ukdsi/2020/9780348210194/regulation/3 (the official version)
Page: https://openlegislation.uk/draft-air-quality-domestic-solid-fuels-standards-england-regulations-2020/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.