(c) A holder of a student permit is subject to the following limitations:

1. (1) assistance in diagnosis and surgery must be under the immediate supervision of a veterinarian licensed in this state;
2. (2) assistance in treatment must be under the direct or indirect supervision of a veterinarian licensed in this state;
3. (3) not more than one student permit holder at a time may be under the direct supervision of a veterinarian licensed in this state; and
4. (4) a veterinary practice may not retain more than two student permit holders at a time.

(f) In this section,

1. (1) “direct supervision” means the supervising veterinarian is on the premises where the animal is being treated and is quickly and easily available;
2. (2) “immediate supervision” means the supervising veterinarian is in the immediate area and within audible and visual range of the animal patient and the person treating the patient;
3. (3) “indirect supervision” means the supervising veterinarian does not need to be on the premises but has given either written or oral instructions for the treatment of the animal;
4. (4) “veterinary practice” means a business that provides veterinary services.