Customs Union

A trading area covering two or more countries that agree to abolish internal tariffs and restrictions on the amount of trade (such as quotas), and have a common external tariff and other common trade controls.

Notes

Not to be confused with a free trade area - which has no common customs and nocommon trade policy.

-The EU is a customs union

-EFTA is a free trade area

Links

http://europa.eu.int/comm/taxation_customs/index_en.htm