MS Rules of Professional Conduct - Rule 3. The decision-making body, like a court, should be able to rely on the integrity of the submissions made to it. A lawyer appearing before such a body should deal with the tribunal honestly and in conformity with applicable rules of procedure.
Lawyers have no exclusive right to appear before nonadjudicative bodies, as they do before a court.
The requirements of this Rule therefore may subject lawyers to regulations inapplicable to advocates who are not lawyers. However, legislatures and administrative agencies have a right to expect lawyers to deal with them as they deal with courts.