(a) A representative of record is one who has appeared in a proceeding or whose name is subscribed to any application, petition, or other pleading or to some agreement of the parties filed in the proceedings. The representative shall be the representative of record until the end of the proceeding unless there is a statement to the contrary appearing in the record.(b) Not more than one representative for each party or aligned group of parties shall be heard on any question or in the hearing except upon leave of the judge.(c) Representatives shall:(1) observe the letter and spirit of the Texas Lawyer's Creed, as adopted by the Texas Supreme Court, and the State Bar of Texas' Texas Disciplinary Rules of Professional Conduct, including those provisions concerning improper ex parte communications with the commissioners and judges;(2) advise their clients and witnesses of applicable requirements of conduct and decorum;(3) direct all objections, arguments, and other comments to the judge and not to other participants.