- CMI - Czech Metrology Institute
- FORCE - FORCE Certification A/S
- KEMA - KEMA B.V.
- LMD, DoCA - Legal Metrology Division, Department of Consumer Affairs
- LNE - Laboratoire National de Metrologie et d Essais
- METAS - Federal Institute of Metrology
- NIM - National Institute of Metrology, China
- NMi - NMi Certin B.V.
- NMIA - National Measurement Institute, Australia
- NMIJ/AIST - National Metrology Institute of Japan / National Institute of Advanced Industrial Science and Technology
- PTB - Physikalisch-Technische Bundesanstalt
- RISE - Research Institutes of Sweden AB
- SLM - Slovenská legálna metrológia, n. o.
- Tifernogas - Tifernogas s.r.l.
OIML Issuing Authority(ies)
- INIQ - National Institute of Quality Infrastructure
- NMIA - National Measurement Institute, Australia
- Federal Public Service Economy, S.M.E.s, Self-employed and Energy
- NMC - National Metrology Center
- MC - Measurement Canada
- SAMR - State Administration for Market Regulation
- SIC - Superintendencia de Industria y Comercio
- CMI - Czech Metrology Institute
- FORCE - FORCE Certification A/S
- MoTRI - Ministry of Trade and Regional Integration
- LNE - Laboratoire National de Metrologie et d Essais
- PTB - Physikalisch-Technische Bundesanstalt
- Department of Consumer Affairs
- INSO - Iran National Standards Organization
- Tifernogas - Tifernogas s.r.l.
- Istituto Giordano SPA
- NMIJ/AIST - National Metrology Institute of Japan / National Institute of Advanced Industrial Science and Technology
- W&M - Weights and Measures Department
- Ministry of Commerce Industry Co-operative
- KTC - Korea Testing Certification
- LATMB - LNMC Metrology Bureau
- MBS - Malawi Bureau of Standards
- INNOQ - Instituto Nacional de Normalização e Qualidade
- NSI - Namibian Standards Institution
- NMi - NMi Certin B.V.
- MBIE - Ministry of Business, Innovation and Employment
- DGSM - Directorate General for Standards and Metrology
- National Metrology Laboratory
- RCAM – Rostest - Federal Budgetary Institution “Research Centre for Applied Metrology" (RCAM - Rostest)
- RSB - Rwanda Standards Board
- SASO - Saudi Standards, Metrology and Quality Organization
- SLM - Slovenská legálna metrológia, n. o.
- NRCS - National Regulator for Compulsory Specifications, Legal Metrology Department
- RISE - Research Institutes of Sweden AB
- METAS - Federal Institute of Metrology
- DIT - Department of Internal Trade
- ANM - National Agency of Metrology
- UNBS - Uganda National Bureau of Standards
- MoIAT - UAE Ministry of Industry & Advanced Technology
- OPSS - Office for Product Safety and Standards (OPSS)
- NCWM - National Council on Weights and Measures
- ZMA - Zambia Metrology Agency
