D.C. Mun. Regs. tit. 7, § 1515
1515.1 The Board shall be called to order at the time and place set forth in the notice for the meeting.
1515.2 The Chairman shall ascertain the presence of a quorum before any business is transacted.
1515.3 The Board shall take up business in the order set forth in the agenda for the additional or special meeting. A quorum shall be present, before any business can be transacted.