# Regulation (EC) No 1222/2009 of the European Parliament and of the Council of 25 November 2009 on the labelling of tyres with respect to fuel efficiency and other essential parameters (Text with EEA relevance), Division 3: REQUIREMENTS APPLICABLE TO THE REFERENCE LABORATORIES AND DETERMINATION OF THE ASSIGNED VALUES

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

The assigned values of each alignment tyre shall be determined by a network of reference laboratories. After two years the network shall assess the stability and validity of the assigned values.
Each reference laboratory participating in the network shall comply with the specifications of Annex 6 of UNECE Regulation No 117 and its subsequent amendments and have a standard deviation (σ m ) as follows:
(i) not greater than 0,05 kg/t for class C1 and C2 tyres; and
(ii) not greater than 0,05 kg/t for class C3 tyres.
The sets of alignment tyres, conforming to the specification of section 2.2 shall be measured in accordance with section 2.3 by each reference laboratory of the network.
The assigned value of each alignment tyre is the average of the measured values given by the reference laboratories of the network for this alignment tyre.

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Source: https://www.legislation.gov.uk/eur/2009/1222/annex/IVa/division/3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-1222/annex-IVa/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.