Source: SDC 1939, § 25.0306 (1); SL 1941, ch 106; SL 1949, ch 91; SL 1949, ch 92; SL 1951, ch 120; SL 1953, ch 103, § 1; SL 1961, ch 117, § 1; SL 1969, ch 97; SL 1976, ch 257, § 7; SL 1976, ch 259; SL 1983, ch 297; SL 1985, ch 325; SL 1986, ch 349, § 2; SL 1987, ch 304; SL 1988, ch 334, §§ 6-8; SL 1992, ch 293, § 9; SL 1993, ch 312; SL 2005, ch 223, § 1; SL 2008, ch 216, § 5.