Type of Notification
regular notification
Date of Distribution
2018.12.13
WTO Country
Agency Responsible
European Commission
Regions Affected
European Commission EU-TBT Enquiry Point Fax: +(32) 2 299 80 43 E-mail: grow-eu-tbt@ec.europa.eu Website: http://ec.europa.eu/growth/tools-databases/tbt/
Notified Document Details
<p style="margin:2px !important;">Draft Commission Directive amending, for the purpose of its adaptation to technical progress, the Annex to Council Directive 80/181/EEC as regards the definitions of SI base units (3 pages + Annex 3 pages, in English)</p>
ICS Code
Covered Products
<p style="margin:2px !important;">N/A</p>
Description of Content

This draft Directive intends to update the definitions of the SI base units of Directive 80/181/EEC on units of measurement so as to align them to the ones adopted by the General Conference on Weights and Measures (CGPM) at its 26th meeting in November 2018.

More particularly, the CGPM decided at its 24th meeting in 2011 a new way of defining the SI based on a set of seven defining constants drawn from the fundamental constants of physics and other constants of nature. This decision was confirmed at the 25th meeting of the CGPM in 2014.

At its 26th meeting, the CGPM adopted a resolution adapting, as from 20 May 2019, the definitions of the SI base units of measurement, namely the metre, the kilogram, the second, the ampere, the kelvin, the mole and the candela, corresponding to the seven base quantities of length, mass, time, electric current, thermodynamic temperature, amount of substance and luminous intensity.

The new definitions are based on the new principle of fixed numerical values of the defining constants. They are expected to improve the long-term stability and reliability of the SI base units as well as accuracy and clarity of measurements. The draft Directive intends therefore to align the definitions of the SI base units of Directive 80/181/EEC to the new definitions adopted by the CGPM, ensuring thus the uniform implementation of the SI.

Objectives & Rationale
<p style="margin:2px !important;">The draft directive intends to adapt the definitions of the SI base units so as to align them to the new definitions at international level and thus to ensure legal consistency and coherence. The modifications do not have any direct economic impact on businesses as they concern the legal definitions.</p> <p style="margin:2px !important;">The draft directive will not result in any risk of introducing a barrier to international trade, as it only concerns the alignment of the definition of the SI base units used as legal units of measurement within the European Union to new definitions at international level.</p>
Relevant Documents
Final Date of Comments
2019.02.11
Contact Details
European Commission EU-TBT Enquiry Point Fax: + (32) 2 299 80 43 E-mail: grow-eu-tbt@ec.europa.eu The text is available on the EU-TBT Website: http://ec.europa.eu/growth/tools-databases/tbt/
Document Online Link (EN)
Notified Under
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