First, the Arms Export Control Act, 22 USC §2778.. It authorizes the President to define defense articles and regulate their export. In so doing, he must consider the possibility that export could "support international terrorism, increase the possibility of outbreak or escalation of conflict..." Those defense articles may not be exported without a permit, issued by the Secretary of State ( Department of State guidelines here), "except that no license shall be required for exports or imports made by or for an agency of the United States Government (A) for official use by a department or agency of the United...