(b) The obligor shall give notice of the contest to
- (1) a support enforcement agency providing services to the obligee;
- (2) each employer that has directly received an income withholding order relating to the obligor; and
(3) if
- (A) a person is designated to receive payments in the income withholding order, to that person; or
- (B) no person is designated to receive payments in the income withholding order, to the obligee.