- United Nations General Assembly (1972-1973, 1991-1994, 2000-2005)

- Third United Nations Conference on the Law of the Sea (1975-1981)

- Preparatory Commission for the International Seabed Authority (1996)

- Lancaster House Conference on Southern Rhodesia (1979)

- Paris International Conference on Cambodia (1990-1991)

- ‘Two-plus-Four’ Negotiations on German Unification (1990)

- United Nations Security Council (1991-1994)

- Dayton Proximity Peace Talks on Bosnia and Herzegovina (1995)

- Rambouillet/Paris Meetings on Kosovo (1999)