Colo. Rev. Stat. § 35-56-101
A person licensed in this state to keep an auction where horses, mules, or cattle are sold at auction shall maintain a book, called a stock register, in which the person shall describe minutely every animal the person offers for sale.
Source: R.S. p. 70, § 1. G.L. § 34. G.S. § 87. R.S. 08: § 255. C.L. § 4731. CSA: C. 15, § 17. CRS 53: § 8-12-1. C.R.S. 1963: § 8-12-1. L. 2025: Entire section amended, (HB 25-1084), ch. 24, p. 140, § 157, effective August 6.