No motor vehicle, except as provided in section 321.117 , shall be registered for a registration year for less than ten dollars. [C24, 27, 31, 35, §4909; C39, § 5008.08; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.112 ] 82 Acts, ch 1062, §14, 38 ; 2007 Acts, ch 143, §11, 35 ; 2008 Acts, ch 1124, §37 Referred to in §331.557