51. For the purposes of preserving the secrecy of confidential information brought to his knowledge in the practice of his profession, a member shall:
(1) refrain from using such information to the prejudice of his client or with a view to obtaining a direct or indirect benefit for himself or for another person;
(2) take the necessary measures to prevent his colleagues and the persons under his authority or supervision from disclosing or making use of such information that becomes known to them in the performance of their duties; and
(3) avoid holding or participating in indiscreet conversations concerning a client and the services provided to him.