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.
Iowa Code § 904.114
83 Acts, ch 96, §11, 159 85 Acts, ch 21, §54 2011 Acts, ch 127, §52, 89