Colo. Rev. Stat. § 34-53-103
Any person, corporation, or association, or the agent of any person, corporation, or association, engaged in the milling, sampling, concentrating, reducing, shipping, or purchasing of ores in this state who in any manner knowingly alters or changes the true value of any ores delivered to him or her, so as to deprive the seller of the result of the correct value of the same, or who substitutes other ores for those delivered to him or her, or who issues any bill of sale or certificate of purchase that does not exactly and truthfully state the actual weight, assay value, and total amount paid for any lot of ore purchased, or who, by any secret understanding or agreement with another, issues a bill of sale or certificate of purchase that does not truthfully and correctly set forth the weight, assay value, and total amount paid for any lot of ore purchased by him or her commits a class 2 misdemeanor.
C.R.S. § 34-53-103
Section 803(2) of chapter 462 (SB 21-271), Session Laws of Colorado 2021, provides that the act changing this section applies to offenses committed on or after March 1, 2022.