A requirement that income be withheld for child support shall promptly terminate as to prospective payments when the payor receives notice from the court or IV-D agency that:
(1) The child support order has expired or become invalid; or
(2) The initiating party, the obligor, and the district court judge agree to termination because there is another adequate means to collect child support or arrearages; or
(3) The whereabouts of the child and obligee are unknown, except that withholding shall not be terminated until all valid arrearages to the State are paid in full.