ROK nationality can also be relinquished by application to the Ministry of Justice. Female citizens who are also foreign nationals at birth must declare their intention to retain or renounce ROK nationality before age 22. Male citizens who obtained foreign nationality by birth must make this declaration before 31 March of the year they become age 18. Dual nationals who retain South Korean nationality after this point are subject to conscription orders and are not permitted to renounce ROK nationality until they have completed military service.