Art. 167. Parental authority terminates -

1. By the death of the parents or of the child.

2. By emancipation.

3. By the adoption of the child.

Art. 168. The mother who contracts a second marriage loses her parental authority over her children, unless the deceased husband, the father of the latter, should have in his will made express provision for the remarriage of his widow, and had ordered that in such case she was to preserve and exercise the parental authority over their children.