ATM because the internal trade function iterates through countries, it does not work as intended for customs unions.
When running in a customs union, it needs to use a different order which instead of countries, iterates through all the regions in the customs union - which are thankfully already stored in a readily accessible list.
ATM because the internal trade function iterates through countries, it does not work as intended for customs unions.
When running in a customs union, it needs to use a different order which instead of countries, iterates through all the regions in the customs union - which are thankfully already stored in a readily accessible list.