D.C. Code § 44-533.03: Staffing.

Each center shall have an administrator and a medical director. The director must be a physician licensed to practice the healing art in the District of Columbia. There shall be sufficient professional staff to perform services for which the center is licensed in conformity with generally accepted standards of good medical practice. No clinical procedure may be performed unless sufficient professional staff is on duty to both carry out the procedure and render any emergency services that may be needed, including, if necessary, accompanying the patient to a hospital.