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» ILAC – OIML Partnership


ILAC and the International Organization of Legal Metrology (OIML) have a long standing relationship.


Memorandum of Understanding

The Joint ILAC-IAF-OIML Memorandum of Understanding (MoU) was signed on 16 October 2014 in Vancouver, Canada.


Joint Assessments

The Joint ILAC-OIML Assessment Procedure in the field of legal metrology was published in December 2014.


Joint Declarations

Metrological Traceability

The Joint BIPM-OIML-ILAC-ISO Declaration 2011 on metrological traceability builds on the tripartite statement issued by the BIPM, the OIML, and the ILAC in 2006 on the relevance of various international agreements on metrology to trade, legislation and standardization.

Relevance of International Agreements

The Joint BIPM-OIML-ILAC Declaration 2006 on the relevance of various international agreements on metrology to trade, legislation and standardisation. This statement is a reflection of the ongoing close cooperation between ILAC, BIPM and OIML and promotes the use of the three existing Mutual Recognition Arrangements.

Joint BIPM-OIML-ILAC Declaration 2006 – Covering Letter

Joint BIPM-OIML-ILAC Declaration 2006

Joint BIPM-OIML-ILAC Declaration 2006 (French version)



“In my capacity as OIML Liaison Officer with ILAC and the IAF, and as Project Leader for the OIML Mutual Acceptance Arrangement at the Bureau International de Métrologie Légale (BIML), I am honored to support the ILAC/IAF International Accreditation Day.

“Legal Metrology has a great impact on the economy and on society, since it provides credible measurements for trade, health, safety, environmental protection and law enforcement. As technology continues to advance, the need for Legal Metrology becomes increasingly felt and developing partnerships to keep up with these changes has become a pressing priority.

“Legal Metrology also facilitates data exchanges and contributes to reducing the necessity to duplicate measurements. To this end, the OIML publishes International Recommendations which are model technical regulations to be used in each Member State as a basis for developing national regulations and which are in fact “international standards” in the sense of the World Trade Organization Technical Barriers to Trade (WTO TBT) Agreement.

“In 1991, the OIML set up the OIML Certificate System for type evaluation of measuring instruments. This System allows national Issuing Authorities, which are designated by the OIML representatives in the various Member States, to issue OIML Certificates of Conformity based on measuring instrument testing according to the relevant OIML Recommendations. This System aims to facilitate, accelerate and harmonize work at the national or regional levels, and manufacturers may use their Certificates to support their national or regional type evaluation applications.

“In addition to the OIML Certificate System, the OIML has developed its Mutual Acceptance Arrangement (MAA) which strengthens confidence in national testing results by setting up an assessment of national Testing Laboratories responsible for type evaluation of measuring instruments. These Testing Laboratories are assessed either by accreditation or by peer assessment, using the criteria laid down in ISO/IEC 17025. Setting up this OIML MAA has therefore greatly contributed to reinforcing existing cooperation with ILAC.

“Recognition of test results is a first step, and the OIML is revising its Certificate System and the MAA in order to establish a global approach which could include testing, initial certification of measuring instruments, initial inspection, and guidance on periodic in-service inspection of measuring instruments. Cooperation with ILAC and the IAF is essential to create confidence in measurement results and facilitate their use all over the world.”

– Mrs. Régine Gaucher, MAA Project Leader


OIML Contact Details
Tel: 33 1 4878 1282
Fax: 33 1 4282 1727
Email: biml@oiml.org