I spoke with Venalan and he said that the new laws that will be released sometime in the near future are in Arabic numbers, obviously because Roman Numerals are OOC.
It is pretty obvious they are OOC as you cant really say in main: "Oh those Roman Numerals, I so don't understand them" Rom, Roman, are both OOC because they exist in the real world, as also the same as naming a character William or John... etc. To the PS settings it is OOC imo.