The Constitutional Court on Thursday ruled as unconstitutional the absence of a legal framework allowing foreign children born in Korea to have their births registered under Korean law. The court unanimously ruled in favor of a Vietnamese national, identified only as A, and his child, who filed a constitutional complaint arguing that the legislature's failure to establish a system for registering the births of foreign nationals born in Korea violated their constitutional rights. A legislative omission refers to a situation in which the legislature fails to enact a law despite a constitutional obligation to do so in order to protect fundamental rights. A entered Korea under a nonprofessional employment visa and married B, also a Vietnamese national, in 2016. The couple later overstayed their authorized period of residence and became undocumented. When their child was born in Korea in 2019, they were unable to register the birth under Korean law because the country's Act on Registration of Family Relations provides for the registration of births and other family matters only for Korean nat