The countries of Scotland, Northern Ireland and Wales are members of the conference, and although located in Europe, they are no longer part of the European Union.

The body suggests that this would ensure the "precise application of the decentralised dimension of the principles of subsidiarity and proportionality".

[1] The network aims to bring together the regions across the European Union and continental Europe who hold legislative powers with devolved systems of government which hold legal competencies that have been created as a result of the political and constitutional mechanism of the member states of the European Union in which the region is part of.

The six members responsible for managing the network following the Barcelona Conference were Baden-Württemberg, Catalonia, Scotland, Tuscany, Tyrol and Wallonia.

Flanders spearheaded discussions around the creation of a political declaration by Bavaria, Catalonia, North-Rhine Westphalia, Salzburg, Scotland, Flanders and Wallonia and defining regions with legislative power as "regions having a legislature as defined in Article 3 of the First Protocol to the European Convention on Human Rights".