Indiana Code Title 31. Family Law and Juvenile Law § 31-30-1-13

Sec. 13. (a) Subject to subsection (c), a court having jurisdiction under IC 31-14 over establishment or modification of paternity, child custody, parenting time, or child support in a paternity proceeding has concurrent original jurisdiction with another juvenile court for the purpose of establishing or modifying paternity, custody, parenting time, or child support of a child who is under the jurisdiction of the other juvenile court because:

(b) Subject to subsection (d), a court having jurisdiction over a child who is the subject of a child in need of services proceeding or juvenile delinquency proceeding has concurrent jurisdiction with a court having jurisdiction under IC 31-14 for the purpose of establishing or modifying paternity, custody, parenting time, or child support of the child.

(c) Whenever the court having child custody jurisdiction under IC 31-14 in a paternity proceeding modifies child custody as provided by this section, the modification is effective only when the juvenile court with jurisdiction over the child in need of services proceeding or juvenile delinquency proceeding:

(d) If, under this section, a juvenile court:

the order establishing or modifying paternity, custody, child support, or parenting time survives the termination of the child in need of services proceeding or the juvenile delinquency proceeding until the court having concurrent original jurisdiction under subsection (a) assumes or reassumes primary jurisdiction of the case to address all other issues.

(e) A court that assumes or reassumes jurisdiction of a case under subsection (d) may modify child custody, child support, or parenting time in accordance with applicable modification statutes.