29 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. ] :
| | NETHERLANDS ANTILLES | (Willemstad) | | Queen Juliana | | |
| | ARGENTINE | (Buenos Aires a + Olivos r) | | President Isabel Peron | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | BULGARIA | (Sofia) | | Todor Zhivkov | | |
| | 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 | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Walter Scheel | | |
| | DENMARK | (Copenhagen) | | Queen Margaret II | | |
| | SPAIN | (Madrid) | | King Juan Carlos I | | |
| | FINLAND | (Helsinki a + Kultaranta s) | | President Urho Kekkonen | | |
| | FRANCE | (Paris) | | President Valery Giscard d´Estaing | | |
| | GREECE | (Athens a) | | President Constantine Tsatsos | | |
| | GUATEMALA | (Guatemala City) | | President Kjell Eugenio Laugerud Garcia | | |
| | IRELAND | (Dublin) | | President Cearbhall O. Dalaigh | | |
| | ITALY | (Rome a) | | President Giovanni Leone | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | MOROCCO | (Rabat a) | | King Hassan II | | |
| | MEXICO | (Mexico City) | | President Luis Echeverria Alvarez | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Olav V | | |
| | PORTUGAL | (Lisbon) | | President Francisco da Costa Gomes | | |
| | SWEDEN | (Stockholm) | | King Charles XVI Gustav | | |
| | SOVIET UNION | (Moscow) | | Leonid Brezhnev | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President Gerald Ford | | |
| | AUSTRALIA AND NEW ZEALAND | (Brisbane + Melbourne + Auckland) | | Ian Mackay (nz) | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j) | | State President Nicolaas Johannes Diederichs | | |