Since the early 1990s, Latvia has been involved in active trilateral Baltic states co-operation with its neighbours Estonia and Lithuania, and Nordic-Baltic co-operation with the Nordic countries. The Baltic Council is the joint forum of the interparliamentary Baltic Assembly (BA) and the intergovernmental Baltic Council of Ministers (BCM). Nordic-Baltic Eight (NB-8) is the joint co-operation of the governments of Denmark, Estonia, Finland, Iceland, Latvia, Lithuania, Norway, and Sweden. Nordic-Baltic Six (NB-6), comprising Nordic-Baltic countries that are European Union member states, is a framework for meetings on EU-related issues. Interparliamentary co-operation between the Baltic Assembly and Nordic Council was signed in 1992 and since 2006 annual meetings are held as well as regular meetings on other levels. Joint Nordic-Baltic co-operation initiatives include the education programme NordPlus and mobility programmes for public administration, business and industry and culture. The Nordic Council of Ministers has an office in Riga.