An ex parte communication is any oral or written communication that is:
Ex parte communications shall be prohibited unless:
Ex parte communications regarding a particular case shall be prohibited any time after the petition initiating the case has been filed with the Rent Administrator and until the time that all possible appeals of the case are completed.
Any ex parte communication made in violation of this section that comes to the attention of the Rent Administrator shall be made part of the record, and the Rent Administrator shall provide an opportunity for rebuttal by other parties by serving each party with a copy of any such communication or a memorandum describing the communication, within five (5) days of the communication.
If the Rent Administrator determines that a communication was knowingly made (or caused to be made) by a party acting in violation of this section, the Rent Administrator may, to the extent consistent with the interest of justice and applicable law, require the party to show cause why his or her claim or interest in the proceeding should not be dismissed, denied, or otherwise adversely affected.
D.C. Mun. Regs. tit. 14, r. 14-3916