Article 27. Who May Adopt. - Any person of age and in full possession of his civil rights may adopt: Provided, That he is in a position to support and care for his legitimate, legitimated, acknowledged natural children, or natural children by legal fiction, or other illegitimate children, in keeping with the means, both material and otherwise, of the family. In all cases of adoption the adopter must be at least fifteen years older than the person to be adopted. Article 28. Who May Not Adopt. - The following persons may not adopt: 1. A married person without the written consent of the spouse; 2. The guardian with respect to the ward prior to final approval of his accounts; 3. Any person who has been convicted of a crime involving moral turpitude; 4. An alien who is disqualified to adopt according to the laws of his own country or one with whose government the Republic of the Philippines has broken diplomatic relations. Article 29. Adoption by Husband and Wife. - Husband and Wife may jointly adopt. In such case, parental authority shall be exercised as if the child were their own by nature. Article 30. Who May Not Be Adopted. - The following may not be adopted: 1. A married person, without the written consent of the spouse; 2. An alien with whose government the Republic of the Philippines has broken diplomatic relations; 3. A person who has already been adopted unless the adoption has been previously revoked or rescinded in accordance with this Chapter. Article 31. Whose Consent is Necessary. - The written consent of the following to the adoption shall be necessary: 1. The person to be adopted, if fourteen years of age or over; 2. The natural parents of the child or his legal guardian of the Department of Social Welfare or any duly licensed child placement agency under whose care the child may be; 3. The natural children, fourteen years and above, of the adopting parents. Article 32. Hurried Decisions. - In all proceedings for adoption, steps should be taken by the court to prevent the natural parents from making hurried decisions caused by strain or anxiety to give up the child, and to ascertain, that all measures to strengthen the family have been exhausted and that any prolonged stay of the child in his own home will be inimical to his welfare and interest. Article 33. Case Study. - No petition for adoption shall be granted unless the Department of Social Welfare, or the Social Work and Counselling Division, in case of Juvenile and Domestic Relations Courts, has made a case study of the child to be adopted, his natural parents as well as the prospective adopting parents, and has submitted its report and recommendations on the matter to the