The UN Environment Assembly is open for participation of 193 States Members of the United Nations. It is also open for participation as observers to:
(i) Members of specialized agencies which are not members of the UN Environment Assembly (rule 68 of the rules of procedure of UN Environment Assembly);
(ii) Specialized agencies and related organizations, the United Nations bodies and entities, the intergovernmental organizations and regional economic integration organizations (rule 69); and
(iii) International non-governmental organizations (rule 70).