30 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. ] :
| | ALBANIA | (Tirana) | | Enver Hoxha | | |
| | AUSTRIA | (Vienna) | | President Rudolf Kirchschlaeger | | |
| | AUSTRALIA | (Canberra) | | Queen Elizabeth II | | |
| | BELGIUM | (Brussels) | | King Baudoin I | | |
| | BULGARIA | (Sofia) | | Todor Zhivkov | | |
| | CANADA | (Ottawa) | | Queen Elizabeth II | | |
| | SWITZERLAND | (Berne lq + Lausanne j) | | President Hans Huerlimann | | |
| | CZECHOSLOVAKIA | (Prague a) | | Gustav Husak | | |
| | WEST GERMANY | (Bonn ar + Karlsruhe d) | | Bundespresident Karl Carstens | | |
| | 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 | | |
| | HUNGARY | (Budapest a) | | Janos Kadar | | |
| | IRELAND | (Dublin) | | President Patrick John Hillery | | |
| | ICELAND | (Reykjavik a + Alftanes r) | | President Kristjan Eldjarn | | |
| | ITALY | (Rome a) | | President Sandro Pertini | | |
| | JAPAN | (Tokyo) | | Emperor Hirohito | | |
| | NETHERLANDS | (Amsterdam a + The Hague jlr + Wassenaar r) | | Queen Juliana | | |
| | NORWAY | (Oslo) | | King Olav V | | |
| | POLAND | (Warsaw a) | | Edward Gierek | | |
| | PORTUGAL | (Lisbon) | | President Antonio Ramalho Eanes | | |
| | ROMANIA | (Bucharest) | | Nicolae Ceausescu | | |
| | SWEDEN | (Stockholm) | | King Charles XVI Gustav | | |
| | TURKEY | (Ankara a) | | President Fahri Koruturk | | |
| | UNITED KINGDOM | (London a + Westminster lr + Edinburgh s + Windsor r) | | Queen Elizabeth II | | |
| | AMERICA | (Washington-District of Columbia) | | President Jimmy Carter | | |
| | YUGOSLAVIA | (Belgrade) | | President Josip Broz Tito | | |
| | SOUTH AFRICA | (Pretoria ae + Cape Town l + Bloemfontein j) | | Marais Viljoen | | |