The head of each department, agency, or instrumentality of the Federal Government is authorized—

(1) to cooperate with the head of the designated department or agency with respect to determining the manner in which and the extent to which the United States shall be a participant in and an exhibitor at Interama; and

(2) to make available to the head of the designated department or agency, on a reimbursable basis, such personnel as may be necessary to assist him in carrying out his functions under this chapter.