Sec. 6. (a) An obligor may contest the validity or enforcement of an income withholding order issued in another state and received directly by an income payor in Indiana by registering the order in an Indiana tribunal and filing a contest to that order as provided in IC 31-18.5-6, or otherwise contesting the order in the same manner as if the order had been issued by an Indiana tribunal.
(b) The obligor shall give notice of the contest to:
(1) a support enforcement agency providing services to the obligee;
(2) each income payor that has directly received an income withholding order relating to the obligor; and
(3) the person designated to receive payments in the income withholding order or, if no person is designated, to the obligee.