Section 321.820

[1971 c.654 §5; 1973 c.296 §1; 1977 c.870 §53; 1977 c.893 §21a; 1983 c.462 §10; 1983 c.563 §5; 1987 c.158 §54; 1991 c.459 §316; 1995 c.650 §98; 1999 c.314 §53; renumbered 321.842 in 2003]