(1) the term excepted agency means
(A) the Central Intelligence Agency;
(B) the Defense Intelligence Agency;
(C) the National Security Agency;
(D) the Federal Bureau of Investigation;
(E) the National Geospatial-Intelligence Agency; and
(F) as determined by the President, any Executive agency or unit thereof, the principal function of which is the conduct of foreign intelligence or counterintelligence activities; and
(2) the term head of an excepted agency means
(A) with respect to the Central Intelligence Agency, the Director of Central Intelligence;
(B) with respect to the Defense Intelligence Agency, the Director of the Defense Intelligence Agency;
(C) with respect to the National Security Agency, the Director of the National Security Agency;
(D) with respect to the Federal Bureau of Investigation, the Director of the Federal Bureau of Investigation;
(E) with respect to the National Geospatial-Intelligence Agency, the Director of the National Geospatial-Intelligence Agency; and
(F) with respect to an Executive agency designated under paragraph (1)(F), the head of such Executive agency, and with respect to a unit of an Executive agency designated under paragraph (1)(F), such individual as the President may determine.