In 18VAC150-20-130 B the requirement is Prior to allowing a preceptee or extern in veterinary medicine to perform surgery on a patient unassisted by a licensed veterinarian, a licensed veterinarian shall receive written approval from the owner.   In 18VAC150-20-173. the requirement is If a veterinary student, preceptee, or extern is to perform the surgery, the informed consent shall include that information.   These statements may appear to be in conflict as the first requires informed consent on unassisted surgeries, the second infers any  surgeries. A clarification of these two statements may be helpful