24 Members (excluding the associate or suspended members but including the countries represented on their behalf) [The rulers are not necessarily the representatives in the organisation. ] :
 |  | ARGENTINE | (Buenos Aires a + Olivos r) |  | President Arturo Frondizi |  | |
 |  | AUSTRALIA | (Canberra) |  | Queen Elizabeth II |  | |
 |  | BELGIUM | (Brussels) |  | King Baudoin I |  | |
 |  | CANADA | (Ottawa) | | Queen Elizabeth II |  | |
 |  | SWITZERLAND | (Berne lq + Lausanne j) |  | President Thomas Holenstein | | |
 |  | DOMINICAN | (Ciudad Trujillo) |  | Generalissimo Rafael Leonidas Trujillo | | |
 |  | ECUADOR | (San Francisco of Quito) |  | President Camilo Ponce Enriquez | | |
 |  | UNITED ARAB | (Cairo a + Alexandria r) |  | President Gamal Abdel Nasser |  | |
 |  | FRANCE | (Paris) |  | President Rene Coty | | |
 |  | HONDURAS | (Tegucigalpa a + Comayaguela c) |  | President Ramon Villeda Morales | | |
 |  | HAITI | (Port Au Prince) |  | President Francois Duvalier Papa Doc | | |
 |  | IRELAND | (Dublin) |  | President Sean Thomas O´Kelly | | |
 |  | ISRAEL | (West Jerusalem qu + Tel Aviv-Jaffa i) |  | President Yitzhak Ben-Zvi |  | |
 |  | IRAN | (Tehran) |  | Mohammad Reza Shah Pahlavi | | |
 |  | ITALY | (Rome a) |  | President Giovanni Gronchi | | |
 |  | JAPAN | (Tokyo) |  | Emperor Hirohito | | |
 |  | BURMA | (Rangoon a) |  | President Win Maung | | |
 |  | MEXICO | (Mexico City) |  | President Adolfo Lopez Mateos | | |
 |  | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) |  | Queen Juliana | | |
 |  | PAKISTAN | (Karachi a + Rawalpindi t) |  | President Mohammad Ayub Khan | | |
 |  | TURKEY | (Ankara a) |  | President Celal Bayar | | |
 |  | CHINA-FORMOSA | (Taipeh t) |  | President Chiang Kai-Shek | | |
 |  | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
 |  | AMERICA | (Washington-District of Columbia) |  | President Dwight David Eisenhower | | |
