(2) The agreement shall provide for such services as the child might require, such as the custody, care or treatment of the child for a time fixed in the agreement but not to exceed the time when the child reaches 21 years of age.
(3) The agreement shall be signed by the person or authorized representative of the agency providing the care or treatment and by the director or the authorized representative of the director.
(4) If the agreement provides for payments to the agency providing such services as the child may require, the department shall make these payments.
(5) The department shall adopt rules specifying criteria upon which the director shall base the judgment that a child needs placement services after reaching 18 years of age. [1987 c.157 §3]