For lot of countries for e.g Taiwan (TW), India (IN), the state codes specified in countries.inc file are not same as ISO-3166 codes ( http://en.wikipedia.org/wiki/ISO_3166-2:TW). On searching I found couple of issues to correct the codes but those issues dealt with specific countries and were fixed by changing .inc file for that country. Also in one of the other issue it was mentioned that state codes are based on the information in http://www.geonames.org. But that's also not true for lot of countries. Wondering what standard is being followed in regards to State Codes and what's the best way to have state codes (for all countries) defined in addresses module be based on the same standard.