This is the State’s appeal in a case involving prison inmate Roger G. Van Hoffs challenge to his restitution plan. See Iowa Code § 910.7 (1993). Although the district court upheld the plan with respect to deductions from Van Hoffs prison allowance, the court ruled that correction officials were without statutory authority to impose an across-the-board assessment of twenty percent against funds received by inmates from outside sources. Only the latter issue is before us on appeal.

Our decision is controlled by Walters v. Grossheim, 525 N.W.2d 830 (Iowa 1994). Walters involved an inmate’s claims for injunctive relief against the same newly enacted corrections policy challenged here by Van Hoff. We made the following three observations in Walters about the restitution scheme under review: (1) that Iowa Code section 904.702 specifically authorizes deductions for restitution from inmates’ prison allowances; (2) that a general obligation to make restitution, applicable to prisoners and nonprisoners alike, may be inferred from the broad language of Iowa Code chapter 910 as implemented through 201 Iowa Administrative Code 20.11; and (3) that to conform with constitutional due process standards, restitution may be collected from prisoners’ private sources of income only upon notice and hearing concerning a prisoner’s individualized circumstances. Watters, 525 N.W.2d at 832.

Implicit in our Walters decision was our rejection of the claim advanced here by Van Hoff that only deductions from prison allowances are permitted by statute. The district court’s contrary ruling on that point is incorrect. We are obliged to affirm the court’s refusal to order restitution from Van Hoffs outside sources of income, however, because the assessment was not made on an individualized basis. See Walters, 525 N.W.2d at 833.

AFFIRMED.