Source: L. 64: p. 602, § 14. C.R.S. 1963: § 123-31-14. L. 74: (3) added, p. 371, § 6, effective March 21. L. 75: (1) amended and (4) added, p. 688, § 9, effective July 1. L. 80: (4) amended, p. 408, § 5, effective January 1, 1981. L. 81: (4) amended, p. 2026, § 21, effective July 1. L. 92: Entire article amended, p. 824, § 31, effective January 1, 1993.