A child in respect of whom an adoption order is issued by the ¹[District Magistrate], shall become the child of the adoptive parents, and the adoptive parents shall become the parents of the child as if the child had been born to the adoptive parents, for all purposes, including intestacy, with effect from the date on which the adoption order takes effect, and on and from such date all the ties of the child in the family of his or her birth shall stand severed and replaced by those created by the adoption order in the adoptive family:

   Provided that any property which has vested in the adopted child immediately before the date on which the adoption order takes effect shall continue to vest in the adopted child subject to the obligations, if any, attached to the ownership of such property including the obligations, if any, to maintain the relatives in the biological family.