Source: L. 48, Ex. Sess.: p. 21, §§ 1, 2. CSA: C. 66, § 52(4). CRS 53: § 45-2-1. L. 55: p. 289, § 1. L. 59: pp. 378, 380, §§ 1, 4. C.R.S. 1963: § 45-2-1. L. 67: pp. 596, 599, §§ 1, 6. L. 72: p. 295, § 2. L. 75: (1) amended, p. 659, § 1, effective June 26. L. 76: (1) amended, p. 592, § 3, effective July 1. L. 80: (1) amended, p. 577, § 3, effective July 1. L. 84: (1) amended, p. 577, § 1, effective May 9. L. 95: (1) amended, p. 580, § 1, effective May 22. L. 2004: (1) amended, p. 194, § 12, effective August 4. L. 2007: (1) amended, p. 1609, § 1, effective May 31.