Rank of line and staff corps officers of the Navy and officers of the Marine Corps

§ 5508. Rank of line and staff corps officers of the Navy and officers of the Marine Corps (a) Except for an officer entitled to a rank higher than his grade, line and staff corps officers of the Navy serving in the same grade and officers of the Marine Corps serving in the corresponding grade rank among themselves according to their respective dates of rank in grade, whether or not they are on a lineal list. A staff corps officer with the same date of rank as his running mate ranks above all line and staff corps officers junior to his running mate. (b) Except as provided in subsection (a), officers of the Navy on active duty serving in the same grade and having the same date of rank in that grade rank in the following order: (1) Officers in the line. (2) Officers in the Medical Corps. (3) Officers in the Supply Corps. (4) Officers in the Chaplain Corps. (5) Officers in the Civil Engineer Corps. (6) Officers in the Dental Corps. (7) Officers in the Medical Service Corps. (8) Officers in the Nurse Corps.