The mother's remarriage and custody based on the highest Interests of child

According to Iranian civil code remarriage of mother barriers of custody of children and the custody of the child transferred to the father. According to the philosophy and purpose of rearing children is maintaining the highest interest of them,
The international instruments on the rights of child show the importance of the interests of child and of course in the custody. Then the highest interest of the child should be evaluated. This context categorical imperative cannot be denied custody of the mother due to the re-issued marriage.