# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 9.5.1.2: Concentration and expiration date

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

The concentration of any calibration gas standard and its expiration date specified by the gas supplier shall be recorded.
(a) No calibration gas standard may be used after its expiration date, except as allowed by paragraph (b) of this point.
(b) Calibration gases may be relabelled and used after their expiration date if it is approved in advance by approval authority.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VI/division/9/division/9.5/division/9.5.1/division/9.5.1.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-9/division-9.5/division-9.5.1/division-9.5.1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.