Source: L. 67: p. 880, § 1. C.R.S. 1963: § 86-8-1. L. 90: Entire section amended, p. 574, § 72, effective July 1. L. 94: Entire section amended, p. 2805, § 577, effective July 1. L. 2015: Entire section amended, (SB 15-265), ch. 260, p. 981, § 1, effective August 5. L. 2017: (8) amended, (SB 17-227), ch. 192, p. 705, § 6, effective August 9.