Iowa Code Title I. State Sovereignty and Management [Chs. 1-38D] § 8A.363. Private use prohibited--rate for state business

1. A state officer or employee shall not use a state-assigned motor vehicle for personal private use. A state officer or employee shall not be compensated for driving a privately owned motor vehicle unless it is done on state business with the approval of the director. In that case the state officer or employee shall receive an amount to be determined by the director. The amount shall not exceed the maximum allowable under the federal internal revenue service rules per mile, notwithstanding established mileage requirements or depreciation allowances. However, the director may authorize private motor vehicle rates in excess of the rate allowed under the federal internal revenue service rules for state business use of substantially modified or specially equipped privately owned vehicles required by persons with disabilities. A statutory provision establishing reimbursement for necessary mileage, travel, or actual expenses to a state officer falls under the private motor vehicle mileage rate limitation provided in this section unless specifically provided otherwise. Any peace officer employed by the state as defined in section 801.4 who is required to use a private motor vehicle in the performance of official duties shall receive the private vehicle mileage rate at the rate provided in this section. However, the director may delegate authority to officials of the state, and department heads, for the use of private vehicles on state business up to a yearly mileage figure established by the director. If a motor vehicle has been assigned to a state officer or employee, the officer or employee shall not collect mileage for the use of a privately owned motor vehicle unless the motor vehicle assigned is not usable.

2. This section does not apply to any of the following: