Act Governing the Choice of Law in Civil Matters Involving Foreign Elements Article 51

A child is a legitimate child if he/she was a legitimate child at the time of birth under the national law of the child, of his/her mother, or of the husband of his/her mother. However, where the marriage relationship between the parents has ended before a child was born, the child is a legitimate child if he/she was a legitimate child under his/her national law when born or under the national law of his/her mother or of the husband of his/her mother at the time the marriage relationship ended.