Once again President 이병박 allowed dual citizenship, for biological males, if they served in the army, and for biological women, if they meet US citizenship requirements. Don't know how people that renounced citizenship works, that's outside of my expertise. For example my 여돈생 & 형 renounced her citizenship last year although they became citizens a long time ago they renounced it at the 동사무소 (now called 주민센터) but they could've gotten dual citizenship, but for inheritance purposes the 법무사 recommended renouncing citizenship, don't know why...my sister was upset about it...