25. A member shall not cease to act on behalf of a client unless he has sound and reasonable grounds for doing so. Such grounds are sound and reasonable where, in particular
(1) the client has lost faith in the member;
(2) the client no longer derives any benefit from the member’s services;
(3) the member is in a situation of conflict of interest or a situation in which his professional independence could be questioned; or
(4) the client attemps to induce the member to commit illegal, unfair or fraudulent acts.