Border control is the implementation of border controls on travel between Svalbard, which maintains a policy of free migration as a result of the Svalbard Treaty (Norwegian: Svalbard-traktaten; ) and the Schengen Area, which includes the rest of Norway. The Kingdom of Denmark also maintains a complex system of subnational countries with autonomous customs policies, since they aren’t within the European Union like the Danish mainland. These are Greenland () and the Faroe Islands (). These areas do not maintain strict immigration controls with the Schengen Area, but border controls are sporadically enforced for customs purposes. Other examples of effective internal border
Kingdom of León present, León is composed of the provinces of León, Zamora, and Salamanca, is now part of the autonomous community of Castile and León within the modern Kingdom of Spain. Political parties representing "Leonesismo", the Leonese regionalist and nationalist movements, support the creation of an autonomous community separate from Castile. Leonesist parties gained 13.6% of votes cast in the León autonomic elections in 2007. There have also been initiatives approved by some Leonese city councils to establish a NUTS-2 (European Statistical Region) for León. Kingdom of León The Kingdom of León (, ; ; Astur-Leonese: "Reinu de Llïón"; ; ; ;