Secretary concerned
(9)The term “Secretary concerned” means— (A)the Secretary of the Army, with respect to matters concerning the Army; (B)the Secretary of the Navy, with respect to matters concerning the Navy, the Marine Corps, and the Coast Guard when it is operating as a service in the Department of the Navy; (C)the Secretary of the Air Force, with respect to matters concerning the Air Force; and (D)the Secretary of Homeland Security, with respect to matters concerning the Coast Guard when it is not operating as a service in the Department of the Navy.