is entitled to assistance under TANF only if the dependent child and any children of the dependent child reside with a parent, a legal guardian, or an adult relative other than a parent or legal guardian of the dependent child. A legal guardian or an adult relative not listed in section 1(a)(2)(A) of this chapter must have custody of the child under a court order.
The parent of a dependent child described in subdivision (1) or (2) is financially responsible for the care of a child of the dependent child until the dependent child becomes eighteen (18) years of age.
IC 12-14-1-1.5