(2) A representative shall advise the client to obey the law.
(3) A representative shall not:
(b) Engage in conduct that is prejudicial to the administration of justice;
(c) Handle a matter which the representative knows or should know that he or she is not competent to handle;
(d) Handle a legal or factual matter without adequate preparation;
(e) Communicate, or cause another to communicate, as to the merits of the proceeding with the presiding officer except on the record or in writing with a copy promptly delivered to the opposing party; or
(f) Communicate with an adverse party regarding matters at issue in the administrative proceeding where the representative knows that the adverse party is represented by an attorney or other qualified representative.
