Mr. HANSEN Belgium from 1971 to 1974
Mr. MOCK Germany from 1974 to 1977
Mr. LINDHOLM Sweden from 1977 to 1980
Mr. TEXIER France from 1980 to 1983
Mr. van HAREN Belgium from 1983 to 1986
Mr. SACERDOTI Italy from 1986 to 1990
Mr. OPPERMAN United Kingdom from 1990 to 1993
Mr. van DELFT Belgium from 1993 to 1997
Mr. Prof. HIRT Germany from 1997 to 2002
Mr. DULAEY France from 2002 to 2005
Mr. Dr. SCANAVINI Italy from 2005 to 2008
Mr. ROOBAERT Belgium from 2008 to 2010
Mr. MAAS Germany from 2010 to