(1) During the minority of the child, the family court may cancel the adoption relationship of its own motion if this is necessary for grave reasons in the best interests of the child.
(2) If the child has been adopted by a married couple, the adoption relationship existing between the child and one spouse also may be cancelled.
(3) The adoption relationship may only be cancelled
a) if, in the case governed by subsection (2), the other spouse or if a natural parent is prepared to take on the care for and child-rearing of the child, and if the exercise of parental custody by that spouse would not be inconsistent with the best interests of the child or
b) if the cancellation is intended to make it possible for the child to be adopted again.