An officer of the Army, Navy, Air Force, Marine Corps, or Space Force who is serving or has served in a position of importance and responsibility designated by the President to carry the grade of lieutenant general or general in the Army, Air Force, Marine Corps, or Space Force or vice admiral or admiral in the Navy under
section 601 of this title may be retired in such grade under subsection (a) only after the Secretary of Defense certifies in writing to the President and the Committees on Armed Services of the Senate and the House of Representatives that the officer served on active duty satisfactorily in such grade.