20. A town planner may not cease to act on behalf of a client, unless he has just and reasonable grounds for doing so. Such grounds are just and reasonable where, in particular:(1) the client has lost confidence in the town planner;
(2) the client attempts to induce the town planner to commit illegal, unfair, fraudulent or derogatory acts;
(3) the town planner is in a situation of conflict of interest or appears to be in such a situation or one where his professional independence could be questioned;
(4) the client fails to systematically fulfil the obligations stipulated in the mandate entrusted to the town planner; or
(5) the town planner’s state of health renders him incapable of carrying out his duties.