Iowa Code
Chapter 359A - FENCES
Section 359A.22A - Habitual trespass.

359A.22A Habitual trespass.
A landowner of land where livestock are kept or an owner of adjoining land shall be liable to erect or maintain a fence if the livestock trespasses upon the land of a neighboring landowner or strays from the land where the livestock are kept onto a public road, as provided in section 169C.6.
2007 Acts, ch 64, §3