16. A member may not unilaterally terminate a mandate unless he has fair and reasonable grounds for doing so, in particular where
(a) the member has been misled by the client, or where the client has failed to co-operate or has interfered unduly;
(b) the client attempts to induce the member to commit illegal, unfair, immoral or fraudulent acts;
(c) the member is in a situation of conflict of interest or a situation in which his professional independence could be questioned; or
(d) the client refuses to pay his fees.