An announcement is expected soon from the Scottish and UK government, taking the shortlist of five potential green freeports down to a chosen two.
The journey to this point has not been without its bumps, hence the 'green' addition to Scotland's versions, following disagreements between Holyrood and Wesminster over the details of the economic zones.
Those in England are defined as areas where customs rules such as taxes do not apply until goods leave, aiming to encourage economic activity and increase manufacturing in the surrounding region.
