441—98.21 (252D) When applicable. When there is a delinquency in an amount equal to the support payable for one month as specified by an order for support or reimbursement order and the child support recovery unit is providing services under 441—Chapter 95, the unit shall enter an order to withhold the obligor’s income not exempt by state or federal law to require the income withheld to be paid to the collection services center to pay the support obligation. An income withholding order shall also be entered to collect the unpaid balance of a judgment for the reimbursement of a support debt when a repayment schedule is not specified in the order establishing the judgment.