Medical etiquettes are between which of the following categories?

Medical etiquette deals with the conventional laws of couesy observed between members of the medical profession. A doctor should behave with his colleagues as he would have them behave with himself. Ethical behaviour is a self-imposed duty upon each doctor. A doctor should not criticise or denigrate the professional ability of another doctor, while dealing with a patient. Ref: The Essentials of Forensic Medicine and Toxicology by Dr. K. S. Narayan Reddy, 27th edition, Page 1.