Section 3. Article 236 of the same Code is also hereby amended to read as follows:

"Art. 236. Emancipation shall terminate parental authority over the person and property of the child who shall then be qualified and responsible for all acts of civil life, save the exceptions established by existing laws in special cases.

"Contracting marriage shall require parental consent until the age of twenty-one.

"Nothing in this Code shall be construed to derogate from the duty or responsibility of parents and guardians for children and wards below twenty-one years of age mentioned in the second and third paragraphs of Article 2180 of the Civil Code."