327D.74  Changes in schedules.
  The department shall have power from time to time, in its discretion, to determine and prescribe by order such changes in the form of the schedules referred to in this chapter as it may find expedient, and to modify the requirements of any of its orders or rules in respect thereto.
[C97, §2128; C24, 27, 31, 35, 39, §8091; C46, 50, 54, 58, 62, 66, 71, 73, 75, §479.57; C77, 79, 81, §327D.74; 81 Acts, ch 22, §22]