– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Joint BIPM, OIML, ILAC and ISO declaration on metrological traceability

The International Bureau of Weights and Measures (BIPM), the International Organization of Legal Metrology (OIML), the International Laboratory Accreditation Cooperation (ILAC) and the International Organization for Standardization (ISO) are four internationally recognized bodies which are responsible for metrology, accreditation and standardization world-wide.

Recognizing the importance of metrologically traceable measurement results to the core missions of these four Organizations, the following joint policy document has been drawn up. We encourage the Members of the four Organizations, as well as others for whom traceability is important, to adopt it. We also encourage other bodies to declare their support for the principles and practices embodied in this Declaration wherever possible.

The document builds on the tripartite statement issued by the BIPM, the OIML and the ILAC on 23 January 2006 on the relevance of various international agreements on metrology to trade, legislation and standardization.

Joint BIPM, OIML, ILAC and ISO declaration on metrological traceability

9 November 2011


Director of the BIPM
Director of the BIML
Chair of ILAC
Secretary General of ISO
Michael Kühne
Stephen Patoray
Peter Unger
Robert Steele
Metre Convention logo OIML ILAC ISO


Related articles
Text of the Joint BIPM, OIML, ILAC and ISO declaration on metrological traceability (2011)
Tripartite statement (BIPM-OIML-ILAC) on the relevance of various international agreements on metrology to trade, legislation and standardization (2006)
What is traceability?