# Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003 (Text with EEA relevance), Division 5: The compost shall meet at least one of the following stability criteria:

Extent: E+W+S+N.I.

(a) Oxygen uptake rate:
Definition: an indicator of the extent to which biodegradable organic matter is being broken down within a specified time period. The method is not suitable for material with a content of particle sizes > 10 mm that exceeds 20 %,
Criterion: maximum 25 mmol O2/kg organic matter/h; or
(b) Self heating factor:
Definition: the maximum temperature reached by a compost in standardised conditions as an indicator of the state of its aerobic biological activity,
Criterion: minimum Rottegrad III.

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Source: https://www.legislation.gov.uk/eur/2019/1009/annex/II/part/II/division/3/division/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-1009/annex-II/part-II/division-3/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.