 Children under the age of majority in Taiwan (20 years of age) may establish household registration as long as they have direct lineal relatives with household registration.For adult "unregistered nationals" to become "registered nationals", and thus eligible for a National Identification Card, they must reside in Taiwan for a certain period of time, during which they will hold a TARC instead of an ID Card.Currently, for "unregistered nationals" who have direct lineal relatives who are "registered nationals" (e.g.