Among the following statements, ( ) are true about a free trade zone.

A、Free trade zones are usually organized around major seaports, international airports, and national frontiers

B、A free trade zone is established as an international level free trade area between sovereign states
C、Goods can be imported and exported in a free trade zone without duties
D、Exporting to a free trade zone in a country can free shippers from that country’s legal jurisdiction
E、Free trade zones are closely related to bilateral trade agreements