Source: L. 69: p. 698, § 1. C.R.S. 1963: § 88-5-6. L. 75: Entire section amended, p. 707, § 7, effective July 14. L. 88: Entire section amended, p. 821, § 31, effective May 24. L. 89: (1) amended and (2) repealed, pp. 1259, 1260, §§ 10, 11, effective May 3. L. 98: (1) amended, p. 140, § 2, effective August 5.