The Agreement of 3 April 2001 was signed by 35 sovereign States and was subjected to different internal procedures (approval, acceptance or ratification). The Agreement went into force on 1 January 2004, following the deposit of the 31st instrument of ratification.
As of 6 November 2018 the International Organisation of Vine and Wine was made up of 47 Member states.
The international treaty of 3 April 2001 also enables some territories and organisations to participate in the OIV works as observers.
AIDV - International Wine Law Association
AREV - Assembly of Wine-Producing European Regions
AUIV - International University Association of Wine
CERVIM - Centre for Research, Environmental Sustainability and Advancement of Mountain Viticulture
FIVS - International Federation of Wines and Spirits
OENOPPIA - Oenological Products and Practices International Association
UIOE - Union Internationale des Œnologues
VINOFED - World Federation of Major International Wine and Spirits Competitions
ASI - Association de la Sommellerie Internationale
WIM - Wine in Moderation
Yantaï (China), prefecture-level municipality
EU - European Union