321A.33  Exceptions.
  This chapter does not apply to any motor vehicle owned by the United States, this state, or any political subdivision of this state or to any operator, except for section 321A.4, while on official duty operating such motor vehicle. This chapter does not apply, except for sections 321A.4 and 321A.26, to any motor vehicle which is subject to section 325A.6.
[C50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321A.33; 82 Acts, ch 1150, §1]
98 Acts, ch 1100, §49; 2008 Acts, ch 1031, §112