D.C. Mun. Regs. tit. 10, r. 10-C3005
Any party or person may appear as a witness and offer evidence at the public hearing.
Witnesses shall testify orally under oath or affirmation.
Witnesses may be cross-examined by any other party.
Evidence shall be taken in conformity with the Administrative Procedure Act (D.C. Official Code § 2-509(b) ).
Exhibits may be offered in evidence at the public hearing. Exhibits may be in the form of photographs, models, architectural plans, graphs, or the like.
Copies of exhibits shall be submitted for the record, either at the hearing or before closure of the record. If models are used at the hearing, photographs of the models not exceeding letter size shall be supplied.
No material shall be submitted for the record which exceeds standard letter size of 81/2 by 11 inches, or cannot be folded to letter size.
The provisions of the Historic Protection Act and these regulations are considered part of every proceeding before the Mayor's Agent and it is not necessary for any party or person to move their introduction into evidence.
D.C. Mun. Regs. tit. 10, r. 10-C3005