The Organisation for the Security and Cooperation in Europe is the world's largest regional security organization whose 57 participating States span the geographical area from Vancouver to Vladivostok. The Parliamentary Assembly on the OSCE brings together 323 delegates from 56 parliaments. Its areas of competence are to:
- assess the implementation of OSCE objectives by participating States;
- discuss subjects addressed during meetings of the Ministerial Council and summit meetings of OSCE Heads of State or Government;
- develop and promote mechanisms for the prevention and resolution of conflicts;
- support the strengthening and consolidation of democratic institutions in OSCE participating States;
- contribute to the development of OSCE institutional structures and of relations and co-operation between existing OSCE institutions.
The UK has 13 full representatives in the Assembly and 13 substitute members. The delegation is appointed by the Prime Minister by written ministerial statement in Parliament.