Republic of Austria - Federal Council
Kingdom of Belgium - Senate
Bosnia and Herzegovina - House of Peoples
Czech Republic - Senate
French Republic - Senate
Spain - Senate
Kingdom of the Netherlands - First Chamber of the States-General
Federal Republic of Germany - Federal Council
Republic of Poland - Senate
Russian Federation - Council of Federation
Romania - Senate
Republic of Slovenia - National Council
Swiss Confederation - Council of States
Republic of Italy - Senate
United Kingdom of Great Britain and Northern Ireland - The House of Lords
* * *
Grand Duchy of Luxembourg - Council of State