Iowa Code § 627.11: Exception under decree for spousal support.

If the party in whose favor the order, judgment, or decree for the support of a spouse was rendered has not remarried, the personal earnings of the debtor are not exempt from an order, judgment, or decree for temporary or permanent support, as defined in section 252D.16, of a spouse, nor from an installment of an order, judgment, or decree for the support of a spouse.