Four-star grades go hand-in-hand with the positions of office they are linked to, so these ranks are temporary. Officers may only achieve four-star grade if they are appointed to positions of office that require and/or allow the officer to hold such a rank. Their rank expires with the expiration of their term of office, which is usually set by statute. Four-star officers are nominated for appointment by the President from any eligible officers holding a one-star grade or above, who also meets the other requirements for the position, under the advice and/or suggestion of their respective executive department secretary, service secretary, and if applicable the joint chiefs. The nominee must be confirmed via majority by the Senate before the appointee can take office and thus assume the rank.