Under , "under ordinary circumstances, it is desirable" that either the director or the principal deputy director of national intelligence be an active-duty commissioned officer in the armed forces or have training or experience in military intelligence activities and requirements. Only one of the two positions can be held by a military officer at any given time. The statute does not specify what rank the commissioned officer will hold during his or her tenure in either position. The DNI, who is appointed by the president and is subject to confirmation by the Senate, serves at the pleasure of the president.