Colo. Rev. Stat. § 35-12-114
The commissioner is authorized, pursuant to section 24-4-103, C.R.S., to adopt and enforce rules to implement, administer, and enforce this article. The rules shall include, but are not limited to, rules relating to sampling, analytical methods, ingredient form, availability, minimums, exempted materials, investigational allowances, definitions, records, labels, labeling, liability bond, misbranding, mislabeling, commercial fertilizers, specialty fertilizers, soil conditioners, plant amendments, and compost, as may be necessary to carry into effect the full intent and meaning of this article. The commissioner shall not adopt any rule that is inconsistent with a rule promulgated by a state entity for any substance governed by this article.
C.R.S. § 35-12-114