4.A veterinary surgeon shall practise the profession in accordance with the recognized standards of practice and the present state of knowledge in medical science. For that purpose, he shall in particular
(1) make his diagnosis with great care;
(2) use the appropriate scientific methods and, where necessary, ask for the most enlightened advice;
(3) keep his knowledge up to date and maintain and develop his skills;
(4) refrain from using, outside of the recognized scientific community, means of diagnosis or treatment that are insufficiently proven.