1 05/1992 Genk B
2 10/1992 Merchweiler D
3 05/1993 Beaufort L
4 10/1993 Valkenburg/Maastricht NL
5 05/1994 Laon F
6 09/1994 Herten D
7 05/1995 Visé B
8 10/1995 Besseringen D
9 06/1996 Vilosnes F
10 10/1996 Merchweiler D
11 05/1997 Bilzen B
12 10/1997 Herten D
13 5/1998 Remich L
14 10/1998 Kerkrade NL
15 05/1999 Macon F
16 09/1999 Wégimont B
17 05/2000 Genk B
18 05/2001 Kaub D
19 05/2002 Merzig D
20 05/2003 Herten D
21 05/2004 Esch-sur-Alzette L
22 05/2005 Hoeselt B
23 05/2006 Venlo NL
24 11/2006 Merchweiler D
25 05/2007 Esch-sur-Alzette L
26 04/2008 Bad Ems D
27 05//2009 Phalsbourg F
28 05/2010 Niewport-an-Zee B
29 05/2011 Amnéville F
30 05/2012 Venlo NL
31 05/2013 Herten D
32 05/2014 Esch-sur-Alzette L
33 05/2015 Merchweiler D
34  05/2016 Bad Camberg D
35 05/2017 Tongeren B
36 05/2018 Wuppertal D
37 05/2019 Amnéville F
38 05/2020virtual meeting (COVID-19)
38a 2021 Arcen NL
39 2022 Saarland D