Source: L. 71: R&RE, p. 448, § 1. C.R.S. 1963: § 40-6-302. L. 77: (1) amended, p. 965, § 35, effective July 1. L. 83: Entire section added, p. 695, § 7, effective June 15. L. 90: (3) added, p. 1026, § 8, effective July 1. L. 2000: (3) amended, p. 1847, § 33, effective August 2.