First Session - Dublin, Ireland, 25–30 April 1960
Chairman: Mr Michael J. Gallagher (Ireland)
First Vice-Chairman: Mr Marcel Huet (Belgium)
Second Vice-Chairman: Dr Wilhelm Einsele (Austria)
Second Session - Paris, France, 7–12 May 1962
Chairman: Mr Michael J. Gallagher (Ireland)
First Vice-Chairman: Mr Marcel Huet (Belgium)
Second Vice-Chairman: Dr Wilhelm Einsele (Austria)
Third Session - Scharflind-am-Mondsee, Austria, 20–25 April 1964
Chairman: Mr Michael J. Gallagher (Ireland)
First Vice-Chairman: Mr Marcel Huet (Belgium)
Second Vice-Chairman: Dr Wilhelm Einsele (Austria)
Fourth Session - Belgrade, Yugoslavia, 9–14 May 1966
Chairman: Mr Marcel Huet (Belgium)
First Vice-Chairman: Mr Jørgen Dahl (Denmark)
Second Vice-Chairman: Mr Kiril Apostolski (Yugoslavia)
Fifth Session - Rome, Italy, 20–24 May 1968
Chairman: Mr Marcel Huet (Belgium)
First Vice-Chairman: Dr Jørgen Dahl (Denmark)
Second Vice-Chairman: Mr Shimon Tal (Israel)
Sixth Session - Krakow, Poland, 18–22 May 1970
Chairman: Mr Marcel Huet (Belgium)
First Vice-Chairman: Dr Jørgen Dahl (Denmark)
Second Vice-Chairman: Mr Shimon Tal (Israel)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Dr R. Vibert (France) | Dr T. Backiel (Poland) | Mr A.E. Hofstede (Netherlands) |
| Sub-Commission II: | Mr D.E. van Drimmelen (Netherlands) | Dr K.M. Apostolski (Yugoslavia) | Mr Kj.W. Jensen (Norway) |
| Sub-Commission III: | Mr A.V. Holden (U.K.) | Dr T.B. Hasselrot (Sweden) | Mr R. Lloyd (U.K.) |
Seventh Session - Amsterdam, Netherlands, 24–28 April 1972
Chairman: Mr A.V. Holden (U.K.)
First Vice-Chairman: Dr T. Backiel (Poland)
Second Vice-Chairman: Mr Shimon Tal (Israel)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Dr B. Müller (Switzerland) | Dr T. Backiel (Poland) | Mr A.E. Hofstede (Netherlands) |
| Sub-Commission II: | Mr D.E. van Drimmelen (Netherlands) | Dr K.M. Apostolski (Yugoslavia) | Mr K. Westman (Finland) |
| Sub-Commission III: | Prof Dr K. Tiews (Germany, Fed. Rep.) | Dr T.B. Hasselrot (Sweden) | Mr R. Lloyd (U.K.) |
Eighth Session - Aviemore, Scotland, 6–10 May 1974
Chairman: Mr A.V. Holden (U.K.)
First Vice-Chairman: Prof T. Backiel (Poland)
Second Vice-Chairman: Mr P. Lamarque (France)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Prof Dr K. Tiews (Germany, Fed. Rep.) | Mr C.J. McGrath (Ireland) | Mr A.E. Hofstede (Netherlands) |
| Sub-Commission II: | Mr D.E. van Drimmelen (Netherlands) | Dr K.M. Apostolski (Yugoslavia) | Mr K. Westman (Finland) |
| Sub-Commission III: | Mr J.S. Alabaster (U.K.) | Dr T.B. Hasselrot (Sweden) | Mr R. Lloyd (U.K.) |
Ninth Session - Helsinki, Finland, 9–15 June 1976
Chairman: Mr D.E. van Drimmelen (Netherlands)
First Vice-Chairman: Prof T. Backiel (Poland)
Second Vice-Chairman: Mr P. Lamarque (France)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Prof K. Tiews (Germany, Fed. Rep.) | Mr C.J. McGrath (Ireland) | Dr B. Steinmetz (Netherlands) |
| Sub-Commission II: | Prof M. Huet (Belgium) | Prof N. Fijan (Yugoslavia) | Miss J. Doyle (Ireland) |
| Sub-Commission III: | Mr J.S. Alabaster (U.K.) | Dr P. Tuunainen (Finland) | Mr R. Lloyd (U.K.) |
Tenth Session - Hamburg, Federal Republic of Germany, 20–27 June 1978
Chairman: Dr K. Tiews (Germany, Fed. Rep.)
First Vice-Chairman: Mr P. Lamarque (France)
Second Vice-Chairman: Dr P. Tuunainen (Finland)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Prof T. Backiel (Poland) | Mr C.J. McGrath (Ireland) | Mr B. Steinmetz (Netherlands) |
| Sub-Commission II: | Prof N. Fijan (Yugoslavia) | Mr Shimon Tal (Israel) | Miss J. Doyle (Ireland) |
| Sub-Commission III: | Mr G. Leynaud (France) | Mr V. Mitrović-Tutundzić (Yugslavia) | Mr R. Lloyd (U.K.) |
Eleventh Session - Stavanger, Norway, 28 May-3 June 1980
Chairman: Prof Dr K. Tiews (Germany, Fed. Rep.)
First Vice-Chairman: Mr J. Brachet (France)
Second Vice-Chairman: Dr P. Tuunainen (Finland)
| Chairman | Vice-Chairman | Rapporteur | |
| Sub-Commission I: | Prof T. Backiel (Poland) | Dr Kj.W. Jensen (Norway) | Dr B. Steinmetz (Netherlands) |
| Sub-Commission II: | Prof Dr N. Fijan (Yugoslavia) | Dr L. Dobrai (Hungary) | Miss J. Doyle (Ireland) |
| Sub-Commission III: | Mr M.G. Leynaud (France) | Mr R. Lloyd (U.K.) | Dr V. Dethlefsen (Germany, Fed. Rep.) |
