In the fulfillment of its purposes and in carrying out its annual budget programs submitted to and approved by the Congress pursuant to chapter
91 of title
31, the Corporation is authorized to use its general powers only to—
(h)
Carry out such other operations as the Congress may specifically authorize or provide for.
In the Corporation’s purchasing and selling operations with respect to agricultural commodities (other than tobacco) (except sales to other Government agencies), and in the warehousing, transporting, processing, or handling of agricultural commodities (other than tobacco), the Corporation shall, to the maximum extent practicable consistent with the fulfillment of the Corporation’s purposes and the effective and efficient conduct of its business, utilize the usual and customary channels, facilities, and arrangements of trade and commerce (including, at the option of the Corporation, the use of private sector entities).