outsider income tax, any transaction /trades made in that nation's claims have income tax
Example:
Rome have 0.5% income tax
Russia have 0.4% income tax
If a player sells an item from Rome's /ah they will loose 0.5% from income tax
However if they sell an item from Russia's /ah they will loose 0.4%
This will also work on chest shops. If a chest shop set in Rome's claims sells something they will loose 0.5% income tax, and if in Russia 0.4% income tax.
(max is 0.5%)