C.R.S. § 35-35-101

Any person, firm, company, association, or corporation, foreign or domestic, who makes a business of buying grain, wheat, corn, barley, oats, or rye from the producer shall be required to buy the same on the basis of federal grades, and the purchasing agent of each person, firm, company, association, or corporation dealing in grain shall inspect and grade all grain purchased in accordance with the federal grades in effect at the time of said inspection.