1. Russian Metrological Institute of Technical Physics and Radio Engineering (VNIIFTRI)
2. Physikalisch-Technische Bundesanstalt (PTB)
3. TÜBITAK UME National Metrology Institute (TÜBITAK UME)
4. Institute of Metrology within the National Agency of Georgia for Standards and Metrology (GeoSTM)
5. Kazakhstan Institute of Metrology (KazInMetr)
6. National Institute of Metrology (INM)
7. Center for Standardization and Metrology under the Ministry of Economy of the Kyrgyz Republic (KYRGYZSTANDART)
8. Belarusian state Institute of Metrology
9. All-Ukrainian State Scientific-Production Center of Standardization