Source: L. 69: p. 715, § 1. C.R.S. 1963: § 89-20-5. L. 71: p. 981, § 1. L. 73: pp. 985, 988, §§ 2, 1. L. 75: Entire section amended, p. 1300, § 1, effective July 1. L. 77: (2)(a) amended, p. 287, § 60, effective June 29. L. 81: (2)(a.1) added and (2)(b)(I) amended, pp. 1641, 1644, §§ 2, 3, effective May 28. L. 86: (3) added, p. 1070, § 1, effective March 20. L. 91: (3) amended, p. 1071, § 46, effective July 1. L. 92: (1) amended and (4) added, p. 986, § 1, effective July 1; (2)(c)(I)(A) amended, p. 908, § 158, effective January 1, 1993. L. 94: (1) and (2)(d) amended, p. 1339, § 2, effective May 25. L. 96: (1) amended, p. 308, § 2, effective April 15. L. 99: (1) amended, p. 419, § 2, effective April 30. L. 2001: (1) amended and (5) and (6) added, p. 259, § 4, effective November 15. L. 2007: Entire section repealed, p. 836, § 10, effective October 1.