All testimony at a hearing before a Hearing Examiner shall be under oath or affirmation.
If any part of the record in any other proceeding previously held before a Hearing Examiner, or part of the record in any criminal or civil action, including hearings before any administrative agency, is offered in evidence, a certified true copy of that part shall be presented to the Director in the form of an exhibit, unless either of the following requirements is satisfied:
A Hearing Examiner shall exclude irrelevant, immaterial, and unduly repetitious evidence.
A Hearing Examiner may take official notice, at the request of a party or on its own motion, of the following:
If a Hearing Examiner takes official notice of a material fact not appearing in the evidence in the record, it shall give a party the opportunity to show the contrary at the hearing or on motion made within five (5) days after the hearing.
The parties may, by stipulation in writing filed with a Hearing Examiner, agree on the facts or any portion thereof involved in a hearing. The parties may stipulate to the testimony that would be given by a witness if the witness were present.
The Hearing Examiner may require additional evidence concerning any matter covered by a stipulation.
The Director shall take all necessary steps to insure that all department employees who are called by a party as a witness are present at the hearing; provided, that the party has submitted their names and titles in writing to the Hearing Examiner at least three (3) business days in advance of the hearing.
D.C. Mun. Regs. tit. 17, r. 17-1726