Iowa Code § 274.7
The affairs of each school corporation shall be conducted by a board of directors, the members of which in all community or independent school districts shall be chosen for a term of four years.
School officers, §39.24
[C97, §2745; C24, 27, 31, 35, 39, §4125; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §274.7] 2008 Acts, ch 1115, §10, 21