# Commission Regulation (EC) No 641/2004 of 6 April 2004 on detailed rules for the implementation of Regulation (EC) No 1829/2003 of the European Parliament and of the Council as regards the application for the authorisation of new genetically modified food and feed, the notification of existing products and adventitious or technically unavoidable presence of genetically modified material which has benefited from a favourable risk evaluation (Text with EEA relevance), Division A: Terminology:

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

reference material (RM): material or substance, one or more of whose property values are sufficiently homogenous and well-established to be used for calibration of an apparatus, the assessment of a measurement method, or for assigning values to materials;
Certified reference material (CRM): reference material, accompanied by a certificate, one or more of whose property values are certified by a procedure which establishes its traceability to an accurate realisation of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence.

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Source: https://www.legislation.gov.uk/eur/2004/641/annex/II/division/A (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-641/annex-II/division-A
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.