The International Organization of Legal Metrology or Organisation Internationale de Métrologie Légale (OIML) is an intergovernmental treaty organization. The OIML currently has 57 Member States and 58 Corresponding Members[1]
The OIML was established in 1955 to promote the global harmonization of legal metrology procedures. Since that time, the OIML has developed a worldwide technical structure that provides its Members with metrological guidelines for the development of national and regional requirements concerning the manufacture and use of measuring instruments for legal metrology applications.
The OIML's headquarters are in Paris.
What is legal metrology?
"Legal metrology comprises all activities for which legal requirements are prescribed on measurement, units of measurement, measuring instruments and methods of measurement, these activities being performed by or on behalf of governmental authorities, in order to ensure an appropriate level of credibility of measurement results in the national regulatory environment." [OIML D 1:2004 Elements for a law on metrology]