3.03.05. A dispensing optician may not cease to act on behalf of a client, except on legitimate and reasonable grounds, among which are the following, in particular:(a) loss of the client’s confidence;
(b) the fact that the dispensing optician is in conflict of interest or in a situation such that his professional independence could be questioned;
(c) the fact of being encouraged by the client to act illegally, unfairly of fraudulently.