There is in the Marine Corps a Legislative Assistant to the Commandant.
Structure US Code
Subtitle C— Navy and Marine Corps
CHAPTER 806— HEADQUARTERS, MARINE CORPS
§ 8041. Headquarters, Marine Corps: function; composition
§ 8042. Headquarters, Marine Corps: general duties
§ 8043. Commandant of the Marine Corps
§ 8044. Assistant Commandant of the Marine Corps
§ 8046. Staff Judge Advocate to the Commandant of the Marine Corps