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.