Crossing the border between Sweden and Norway is relatively simple. No passport is required due to the Nordic Passport Union and there are no physical border obstructions. However, since Norway is not part of the European Union customs controls can be made if travelling by car to prohibit smuggling. Foreign citizens requiring visa to either state are not allowed to cross the border legally without applying for visa again. There are no restrictions on non-felon Swedish and Norwegian people's rights to live in the neighboring country.