Source: SL 1921, ch 190, § 1; SL 1925, ch 115, ch I, art I, §§ 2, 3, 7; SL 1933, ch 59; SDC 1939, § 4.0102; SL 1943, ch 3; SL 1951, ch 298; SL 1953, ch 318; SL 1955, ch 224; SL 1957, ch 262; SL 1961, ch 260; SL 1965, ch 260; SL 1967, ch 239, § 1; SL 1969, ch 2.