If Federal participation in the exposition, as well as Federal recognition thereof is desired, the applicant shall in a statement to the Director outline the nature of the Federal participation envisioned, including whether construction of a Federal pavilion is contemplated. (It should be noted, however, that before Federal participation can be authorized by the Congress under the Act, the exposition must have (i) met the criteria for Federal recognition and be so recognized, and (ii) been registered by the BIE. Although applicants need not submit such a statement until these prerequisites are satisfied, they are encouraged to do so.) Where the desired Federal participation includes a request for construction of a Federal pavilion, the statement shall be accompanied by the following exhibits: