The clerk of the circuit court in which the order is entered shall transmit a certified copy to the court originally entering the child support order. If the court redirects an existing child support obligation, the order granting temporary or concurrent custody must include, if possible, the determination of arrearages owed to the obligee and the person awarded temporary or concurrent custody and must order payment of the arrearages. (b) May redirect all or part of an existing child support obligation to be paid to the extended family member who is granted temporary or concurrent custody of the child.