Iowa Code § 904.114
The director, staff members, assistants, and employees, in addition to salary, shall receive their necessary traveling expenses by the nearest practicable route, when engaged in the performance of official business. Permission shall not be granted to any person to travel to another state except by approval of the board.
83 Acts, ch 96, §11, 159 CS83, §217A.16 85 Acts, ch 21, §54 CS85, §246.114 C93, §904.114 2011 Acts, ch 127, §52, 89