officers of the Service receive training on the conduct of diplomacy at international organizations and other multilateral institutions and at broad-based multilateral negotiations of international instruments as part of their training upon entry into the Service; and

officers of the Service, including chiefs of mission, who are assigned to United States missions representing the United States to international organizations and other multilateral institutions or who are assigned in Washington, D.C., to positions that have as their primary responsibility formulation of policy toward such organizations and institutions or toward participation in broad-based multilateral negotiations of international instruments, receive specialized training in the areas described in paragraph (1) prior to beginning of service for such assignment or, if receiving such training at that time is not practical, within the first year of beginning such assignment.