Professional Responsibility
Nonadjudative Proceeding
A lawyer representing a client before a legislative body or administrative agency in a nonadjudicative proceeding shall disclose that the appearance is in a representative capacity and shall conform to the provisions of Rules 3.3(a) through (c), 3.4(a) through (c), and 3.5.
Even if you are not in a trial but just representing someone in some other type of hearing, you have to disclose it and comply with the rules about lying clients, evidence, and influencing judges and juries.