Art. 683. Unemancipated minor
A. An unemancipated minor does not have the procedural capacity to sue.
B. Except as otherwise provided in Article 4431, the tutor is the proper plaintiff to sue to enforce a right of an unemancipated minor, when one or both of the parents are dead, the parents are divorced or judicially separated, or the minor is born outside of marriage.
C. The father, as administrator of the estate of his minor child, is the proper plaintiff to sue to enforce a right of an unemancipated minor who is born of the marriage of parents who are not divorced or judicially separated. The mother, as the administratrix of the estate of her minor child, is the proper plaintiff in such an action, when the father is mentally incompetent, committed, interdicted, imprisoned, or an absentee. Moreover, with permission of the judge, the mother may represent the minor whenever the father fails or refuses to do so; and in any event she may represent the minor under the conditions of the laws on the voluntary management of another’s affairs.
D. Notwithstanding the provisions of Paragraph A, B, or C, an attorney appointed by the court having jurisdiction over an unemancipated minor who is in the legal custody of the Department of Children and Family Services is the proper plaintiff to sue to enforce a right of an unemancipated minor. Upon application of the tutor or parent who would otherwise be the proper plaintiff to sue pursuant to Paragraph B or C, the court shall appoint or substitute as the proper plaintiff the best qualified among the tutor, parent, or appointed attorney.
[Source: Louisiana Legislature Website]