If the mutual agreement is unfavorable to the child, the court may change the agreement upon the applications of the authority concerned , the social welfare institution or any other interested person or by its authority in regard to the interests of the minor child.
When the party who should but could not exercise the rights and assume the duties in regard to the minor child or did not protect the interests of the minor child, the other party of the husband and the wife, the minor child, the authorities concerned, the social welfare institution or any other interested person may apply the court to change the mutual agreement in regard to the interests of the minor child.
The provisions in the preceding three paragraphs, the court may decide the contents and methods of exercising rights and assuming duties for the interests of the minor child on the application or by its authority.
The court may decide the way and period of meeting or communication with the minor child by the application of the party who could exercise the rights and assume the duties in regard to the minor child, or by its authority. When the meeting or communication affects the interests of the minor child, the court may change it on the applications or by its authority..