In late 1987, the United States was preparing to pass domestic legislation that would, among other things, call for the closing of the Permanent Observer Mission of the Palestine Liberation Organization to the United Nations in New York.  The international community, in particular UN Secretary-General, Mr. Javier Pérez de Cuéllar, stood firmly by the Mission and Ambassador Terzi, calling on the United States, as the Host Country, to uphold its treaty obligations under the 1947 Headquarters Agreement between the United States and the United Nations.  By virtue of resolution 3237 (XIXX) the PLO and its personnel were invitees of the United Nations and covered under the Agreement, therefore the United States was obligated to allow the entry and exit of PLO personnel in discharging their official duties at the United Nations in New York. The United States Congress did not head to the calls of the international community and eventually passed the domestic legislation and began proceedings in their federal courts against the Mission, attempting to close it down.  Thereafter, on 2 March 1988 the General Assembly requested an ICJ Advisory Opinion in resolution 42/229 B on the matter, which was rendered on 26 April 1988.  The Mission was never shut down due to the tremendous support of the international community and the reliance on international law, in particular the Headquarters Agreement.

Below you will find the relevant resolutions passed by the General Assembly, the related documents and Advisory Opinion of the International Court of Justice and Reports of the Secretary-General.