7 C.F.R. § 17.5
(a) Commodity suppliers and selling agents.
(2) Persons who wish to participate as commodity suppliers shall submit the following information to the Foreign Agricultural Service, Stop 1033, USDA, 1400 Independence Ave., SW, Washington, DC 20250-1033:
(b) Eligibility for financing. To be eligible for financing, commodity contracts must comply with the following requirements unless otherwise specified in the purchase authorization.
(c) Contracting procedures—(1) Purchasing—general.
(2) Invitations for bids. The following conditions shall apply on all purchases of commodities on the basis of IFB's:
(3) Contract awards.
(i) The importer shall consider only offers which are responsive to the IFB and shall make awards either on the basis of the lowest commodity price(s) offered or on the basis of lowest landed cost. However, when vessels offered under the flag of the participant, the importing country or the destination country; or vessels controlled by the participant, the importing country or the destination country are to be used, the participant must purchase commodities for shipment on such vessels only on the basis of the lowest commodity price(s) offered. This limitation may, however, be waived by the GSM: