Greenland–European Union relations and Territories (OCT) of the EU because of its political relations to Denmark in The unity of the Realm also known as the Kingdom of Denmark. As a result, Greenland has some integration with the EU's internal market via association agreements. It is also within the EU's common external tariff but they may charge customs in a non-discriminatory manner. Greenlandic citizens have EU citizenship. OCT nationals can be granted the right to vote for and participate in the election of the European Parliament, subject to the conditions defined by the related member states in compliance with Community law. Up to
Greenland a tight fiscal policy since the late 1980s, which has helped create surpluses in the public budget and low inflation. Since 1990, Greenland has registered a foreign-trade deficit following the closure of the last remaining lead and zinc mine that year. More recently, new sources of ruby in Greenland have been discovered, promising to bring new industry and a new export from the country. (See Gemstone industry in Greenland). Air transportation exists both within Greenland and between the island and other nations. There is also scheduled boat traffic, but the long distances lead to long travel times and low frequency.