(1)  A veterinary surgeon may issue a written order to a veterinary nurse, employed by the veterinary surgeon in the course of his or her practice or business –

(a) authorising the veterinary nurse to administer a substance specified in Schedule 4 to the Poisons List, and also specified in the order, to an animal for the purpose of the treatment of that animal; and

(b) setting out instructions for the administration by the veterinary nurse of that substance.

(2)  A veterinary nurse may administer a substance specified in Schedule 4 to the Poisons List to an animal for the purpose of treating that animal if –

(a) the veterinary nurse is authorised by a veterinary surgeon, in accordance with subregulation (1) , to administer the substance to the animal; and

(b) the substance has been lawfully prescribed and supplied for the animal to whom it is being administered; and

(c) the administration is in accordance with the instructions of that veterinary surgeon.