3.05.05. The advocate must refuse to engage in his professional activities with respect to a case in which:(a) he or a person engaging in professional activities within the same partnership or joint-stock company as him or having an interest therein has carried out judicial or quasi-judicial functions;
(b) he has been engaged as a member or representative of a public organization, such as the Government of Canada or of a province, a municipality or school board, unless he represents such organization.