Source: L. 69: p. 763, § 38. C.R.S. 1963: § 89-21-38. L. 70: pp. 299, 300, §§ 121, 122. L. 71: p. 964, §§ 14, 15. L. 77: (6) amended, p. 234, § 11, effective June 19; (4) and (10) amended, p. 288, § 63, effective June 29; (9) amended, p. 1515, § 83, effective July 15. L. 80: (4) and (10) amended, p. 416, § 32, effective February 21. L. 92: Entire section repealed, p. 924, § 198, effective January 1, 1993.