D.C. Mun. Regs. tit. 4, r. 4-419
When the objectives of the pre-hearing conference have been accomplished, the hearing examiner shall serve on the parties written notice of the formal hearing, including the date, time, and place of the hearing, not less than fifteen (15) calendar days nor more than thirty (30) calendar days prior to the designated date of the hearing.
The formal hearing shall be open to the public.
The formal hearing shall be conducted in accordance with the Act, and in accordance with the provisions of the D.C. Administrative Procedure Act pertaining to contested cases.
In the event of any direct, irreconcilable conflict between this chapter and the Administrative Procedure Act, or any other act or title of the District of Columbia Code, or where this chapter is silent, the Administrative Procedure Act or other act or title of the District of Columbia Code shall control.
D.C. Mun. Regs. tit. 4, r. 4-419