Iowa Code § 642.24: Garnishments — support payment priority.

The court shall include in any order for garnishment a requirement that any amount garnisheed for the payment of a support obligation, whether or not the amount represents a current or delinquent support obligation, shall first be paid out of the garnisheed funds, after subtracting applicable fees related to the issuance of the specific garnishment, before any amounts garnisheed for other purposes are paid out of the garnisheed funds.