All UN member states are parties to the Statute by virtue of their ratification of the UN Charter. Under Article 93(2) of the UN Charter, states which are not a member of the UN may become a party to the Statute, subject to the recommendation of the United Nations Security Council and approval of the United Nations General Assembly. As of 2015, neither the UN General Assembly non-member observer states, namely the State of Palestine and the Holy See, nor any other states are parties to the statute under these provisions. Switzerland (1948-2002), Liechtenstein (1950-1990), San Marino (1954-1992), Japan (1954-1956), and Nauru (1988-1999) were all parties to the Statute prior to becoming UN member states.Search here for "Art 93" to find a series of documents that list every non-UN member that became a party to the ICJ Statute.
