C.R.S. § 12-315-116

(1) All duties or actions performed by a veterinary student or veterinary student preceptor must be assigned by the student’s instructor or be performed under the direct supervision of a licensed veterinarian. If the student does not conform to the following requirements, the licensed veterinarian is in violation of this part 1. A veterinary student or veterinary student preceptor may: (a) Administer drugs only under the direct supervision of a licensed veterinarian; and (b) Perform surgery, only if the student is competent and has the necessary training and experience, under the direct supervision of a licensed veterinarian. (2) It is unlawful for a veterinary student or veterinary student preceptor to participate in the operation of a branch office, clinic, veterinary premises, or allied establishment unless the veterinary student or veterinary student preceptor is under the direct supervision of a licensed veterinarian.