Indiana Code Title 31. Family Law and Juvenile Law § 31-16-15-26

(1) if the order is an income withholding order implemented under section 2.5 of this chapter, the Title IV-D agency;  or

(2) if the order is an income withholding order implemented under section 0.5 of this chapter or an income withholding order implemented after a stay has been lifted under section 5.5 of this chapter, the court or the Title IV-D agency;