The largest free zone are called free cities

A free-trade zone (FTZ) is a class of special economic zone[1][2] It is a geographic area where goods may be landed, stored, handled, manufactured, or reconfigured and re-exported under specific customs regulation and generally not subject to customs duty. Free trade zones are generally organized around major seaports, international airports, and national frontiers—areas with many geographic advantages for trade.[3]

A free-trade zone is a class of special economic zone It is a geographic area where goods may be landed, stored, handled, manufactured, or reconfigured and re-exported under specific customs regulation and generally not subject to customs duty.

Explanation:

-from wikipidea

how does that happen,where u steel points

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