| 1977 | Members (22): Australia, Austria, Belgium, Bulgaria, Canada, Czechoslovakia, Denmark, Finland, France, Germany (BRD and DDR), Hungary, Ireland, Israel, Japan, New Zealand, Norway, Poland, Sweden, Switzerland, UK, USA Luxemburg leaves the IOF |
| 1977 | Members (22): Australia, Austria, Belgium, Bulgaria, Canada, Czechoslovakia, Denmark, Finland, France, Germany (BRD and DDR), Hungary, Ireland, Israel, Japan, New Zealand, Norway, Poland, Sweden, Switzerland, UK, USA Luxemburg leaves the IOF |