After a longer period of time after the adjournment of the second meeting in 1975 in Paris, France at the third session in 1980 was held in Lausanne, Switzerland.

• 不纬过较不幼工夫的闭会后，第二次聚会于1975年在法国巴黎召开，第三次聚会于1980年在瑞士洛桑召开。