34 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 Jorge Rafael Videla | | |
| | AUSTRIA | (Vienna) | | President Rudolf Kirchschlaeger | | |
| | BARBADOS | (Bridgetown) | | Queen Elizabeth II | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | BOLIVIA | (Sucre cj + La Paz eir) | | President Hugo Banzer | | |
| | BRAZIL | (Brasilia) | | President Ernesto Geisel | | |
| | CANADA | (Ottawa) | | Queen Elizabeth II | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Rudolf Gnaegi | | |
| | CHILE | (Santiago of Chile a + Vina del Mar s) | | General Augusto Pinochet | | |
| | COLOMBIA | (Bogota) | | President Alfonso Lopez Michelsen | | |
| | COSTA RICA | (San Jose) | | President Daniel Oduber Quiros | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Walter Scheel | | |
| | DENMARK | (Copenhagen) | | Queen Margaret II | | |
| | DOMINICAN | (Santo Domingo de Guzman) | | President Joaquin Balaguer | | |
| | ECUADOR | (San Francisco of Quito) | | Alfredo Poveda | | |
| | GUATEMALA | (Guatemala City) | | President Kjell Eugenio Laugerud Garcia | | |
| | HONDURAS | (Tegucigalpa a + Comayaguela c) | | Juan Alberto Melgar Castro | | |
| | HAITI | (Port Au Prince) | | President Jean-Claude Duvalier Baby Doc | | |
| | ISRAEL | (West Jerusalem qru + Tel Aviv-Jaffa i) | | President Ephraim Katzir | | |
| | JAMAICA | (Kingston) | | Queen Elizabeth II | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | MEXICO | (Mexico City) | | President Luis Echeverria Alvarez | | |
| | NICARAGUA | (Managua) | | President Anastasio Somoza Debayle | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | PANAMA | (Panama City) | | Supreme Leader General Omar Torrijos Herrera | | |
| | PERU | (Lima) | | President General Francisco Morales Bermudez | | |
| | PARAGUAY | (Assumption) | | President Alfredo Stroessner | | |
| | EL SALVADOR | (San Salvador) | | President Arturo Armando Molina | | |
| | TRINIDAD AND TOBAGO | (Port-of-Spain) | | President Sir Ellis Clarke | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President Gerald Ford | | |
| | URUGUAY | (Montevideo) | | President Alberto Demicheli | | |
| | VENEZUELA | (Caracas) | | President Carlos Andres Perez | | |
| | YUGOSLAVIA | (Belgrade) | | President Josip Broz Tito | | |