Iowa Code
Chapter 1B - STATE FLAG
Section 1B.3 - Flags on public buildings.

1B.3 Flags on public buildings.
It shall be the duty of any board of public officers charged with providing supplies for a public building in the state to provide a suitable state flag and it shall be the duty of the custodian of that public building to raise the flags of the United States of America and the state of Iowa, upon each secular day when weather conditions are favorable.
[S13, §2804-c; C24, 27, 31, 35, 39, §470; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §31.3]
C93, §1B.3
95 Acts, ch 1, §3
Display of flags on school sites, see §280.5