In Europe EU Regulation (EC) No 765/2008 sets out the requirements for accreditation and market surveillance and demands that accreditation has to be based on harmonised International Standards. In this context, the International Organization for Standardization (ISO) has published ISO 17034 which outlines the general requirements which producers of all types of reference materials must fulfil. The structure of ISO 17034 has been aligned with that of ISO/IEC 17025, the International Standard for the competences of testing and calibration laboratories.
Source: https://ec.europa.eu/