| ARGENTINA   | ARGENTINA | MB INSTITUTO ARGENTINO DE NORMALIZACION Y CERTIFICACION (IRAM) | 
| AUSTRALIA   | AUSTRALIA | MB Australian National Committee of IEC | 
| AUSTRIA   | AUSTRIA | MB OVE | 
| BAHRAIN   | BAHRAIN | MB Bahrain Standards & Metrology | 
| BELARUS   | BELARUS | MB BELLIS JSC | 
| BELGIUM   | BELGIUM | MB SGS Belgium N.V. - Division SGS-CEBEC | 
| BRAZIL   | BRAZIL | MB COBEI - Comite Brasileiro de Electricidade, Electronica, Iluminaçao e Telecomunicaçoes | 
| BULGARIA   | BULGARIA | MB Bulgarian Institute for Standardization (BDS) | 
| CANADA   | CANADA | MB CNC/IECEE | 
| CHINA   | CHINA | MB CNCA | 
| COLOMBIA   | COLOMBIA | MB ICONTEC | 
| CROATIA   | CROATIA | MB CROATIAN STANDARDS INSTITUTE (HZN) | 
| CZECH REPUBLIC   | CZECH REPUBLIC | MB EZU | 
| DENMARK   | DENMARK | MB Dansk Standard | 
| FINLAND   | FINLAND | MB SGS FIMKO Ltd | 
| FRANCE   | FRANCE | MB LCIE by delegation from UTE | 
| GERMANY   | GERMANY | MB Deutsches Komitee der IEC | 
| GREECE   | GREECE | MB Hellenic Organization for Standardization (ELOT), part of National Quality Infrastructure System (ESYP) | 
| HUNGARY   | HUNGARY | MB TüV Rheinland InterCert Kft., Division MEEI | 
| INDIA   | INDIA | MB Bureau of Indian Standards | 
| INDONESIA   | INDONESIA | MB BSN | 
| IRAN, ISLAMIC REPUBLIC OF   | IRAN, ISLAMIC REPUBLIC OF | MB Institute of Standards and Industrial Research of Iran (ISIRI) | 
| IRELAND   | IRELAND | MB NSAI (National Standards Authority of Ireland) | 
| ISRAEL   | ISRAEL | MB Standards Institution of Israel | 
| ITALY   | ITALY | MB IMQ SpA | 
| JAPAN   | JAPAN | MB Japan Industrial Standards Committee (JISC) | 
| KAZAKHSTAN   | KAZAKHSTAN | MB Committee for Technical Regulation and Metrology of the Ministry of Industry and New Technologies of the Republic of Kazakhstan | 
| KENYA   | KENYA | MB Kenya Bureau of Standards - KEBS | 
| KOREA, REPUBLIC OF   | KOREA, REPUBLIC OF | MB Korean Agency for Technology and Standards (KATS) | 
| LIBYAN ARAB JAMAHIRIYA   | LIBYAN ARAB JAMAHIRIYA | MB Libyan National Electrotechnical Committee (LNEC) at the Libyan National Center for Standardization and Metrology (LNCSM) | 
| MALAYSIA   | MALAYSIA | MB Department of Standards Malaysia | 
| MEXICO   | MEXICO | MB ANCE | 
| NETHERLANDS   | NETHERLANDS | MB NEC Netherlands Electrotechnical Committee | 
| NEW ZEALAND   | NEW ZEALAND | MB NZ Electrotechnical Committee | 
| NORWAY   | NORWAY | MB Norsk Elektroteknisk Komite (NEK) | 
| PAKISTAN   | PAKISTAN | MB Pakistan Standards and Quality Control Authority (PSQCA) | 
| POLAND   | POLAND | MB PCBC | 
| PORTUGAL   | PORTUGAL | MB CERTIF – Associação para a Certificação | 
| ROMANIA   | ROMANIA | MB Romanian Electrotechnical Committee | 
| RUSSIAN FEDERATION   | RUSSIAN FEDERATION | MB ROSSTANDARD | 
| SAUDI ARABIA   | SAUDI ARABIA | MB Saudi Standards, Metrology and Quality Organization (SASO) | 
| SERBIA   | SERBIA | MB Institute for Standardization of Serbia (ISS) | 
| SINGAPORE   | SINGAPORE | MB SPRING Singapore | 
| SLOVAKIA   | SLOVAKIA | MB Slovak Electrotechnical Committee | 
| SLOVENIA   | SLOVENIA | MB SIQ by delegation from SIST | 
| SOUTH AFRICA   | SOUTH AFRICA | MB South African of Standards (SOC) Ltd: Electrotechnical Laboratories | 
| SPAIN   | SPAIN | MB AENOR | 
| SWEDEN   | SWEDEN | MB SEK Svensk Elstandard | 
| SWITZERLAND   | SWITZERLAND | MB Electrosuisse | 
| THAILAND   | THAILAND | MB Thai Industrial Standards Institute (TISI) | 
| TURKEY   | TURKEY | MB Turkish Standards Institution | 
| UKRAINE   | UKRAINE | MB UkrTEST by delegation of the UKRAINIAN NC OF THE IEC - Derzhspozhivstandard of Ukraine – DSSU | 
| UNITED ARAB EMIRATES   | UNITED ARAB EMIRATES | MB Emirates Authority for Standardization & Metrology (ESMA) | 
| UNITED KINGDOM   | UNITED KINGDOM | MB U.K National Committee for the IECEE (UKIECEE) | 
| USA   | USA | MB US National Committee of the IECEE | 
| VIET NAM   | VIET NAM | MB IEC National Committee of Vietnam, Directorate for Standards, Metrology and Quality (STAMEQ) |