(a) In the case of assistance under subchapter II of this chapter, the Secretary of Defense shall have primary responsibility for
(1) the determination of military end-item requirements;
(2) the procurement of military equipment in a manner which permits its integration with service programs;
(3) the supervision of end-item use by the recipient countries;
(4) the supervision of the training of foreign military and related civilian personnel;
(5) the movement and delivery of military end-items; and
(6) within the Department of Defense, the performance of any other functions with respect to the furnishing of military assistance, education and training.