Source: L. 65: p. 861, § 4. C.R.S. 1963: § 88-6-4. L. 77: Entire section amended, p. 1397, § 1, effective March 16. L. 83: Entire section amended, p. 1206, § 1, effective March 22. L. 85: (3) amended, p. 1019, § 3, effective July 1. L. 89: (1) and (3) amended, p. 1258, § 6, effective May 2. L. 98: Entire section amended, p. 292, § 1, effective August 5. L. 2004: (2) amended, p. 186, § 1, effective August 4. L. 2015: (2) amended, (SB 15-024), ch. 6, p. 13, § 1, effective August 5.