Source: L. 69: p. 716, § 1. C.R.S. 1963: § 89-20-7. L. 70: p. 292, § 98. L. 72: p. 482, § 6. L. 73: pp. 986, 991, §§ 3, 1. L. 80: (3) added, p. 679, § 1, effective May 1. L. 82: (3) repealed,
p. 502, § 8, effective April 15. L. 83: Entire section repealed, p. 1284, § 6, effective June 3.