24 April 1978 - 27 April 1978 Madrid - Spain

20 November 1978 - 23 November 1978 Madrid - Spain

23 April 1979 - 26 April 1979 Madrid - Spain

17 September 1979 - 22 September 1979 Torremolinos - Spain

27 September 1979 Torremolinos - Spain

30 October 2016 - 1 November 2016 - Executive Council - 104th session - Luxor Egypt

21 April 1980 - 24 April 1980 Madrid - Spain

9 December 1980 - 13 December 1980 Madrid - Spain