Iowa Code § 321.383
87 Acts, ch 186, §3; 96 Acts, ch 1152, §18; 97 Acts, ch 108, §20; 98 Acts, ch 1080, §3; 99 Acts, ch 102, §2; 99 Acts, ch 108, §5; 2001 Acts, ch 137, §5; 2010 Acts, ch 1061, §117; 2010 Acts, ch 1069, §96; 2010 Acts, ch 1190, §51
Referred to in §321.1, 321.288, 321.398, 321.438, 805.8A(3)(g), 805.8A(5)(a)
See also §321.423, subsection 6