As of May 2018, 195 states are UNCTAD members: all UN members plus UN observer states Palestine and the Holy See. UNCTAD members are divided into four lists, the division being based on United Nations Regional Groups with six members unassigned: Armenia, Kiribati, Nauru, South Sudan, Tajikistan, Tuvalu. List A consists mostly of countries in the African and Asia-Pacific Groups of the UN. List B consists of countries of the Western European and Others Group. List C consists of countries of the Group of Latin American and Caribbean States (GRULAC). List D consists of countries of the Eastern European Group.