The Export-Import Bank of the United States is authorized and directed to establish a program to provide guarantees for loans extended by financial institutions or other public or private creditors to export trading companies as defined in section 1843(c)(14)(F)(i) of this title, or to other exporters, when such loans are secured by export accounts receivable, inventories of exportable goods, accounts receivable from leases, performance contracts, grant commitments, participation fees, member dues, revenue from publications, or such other collateral as the Board of Directors may deem appropriate, and when in the judgment of the Board of Directors—