The President is authorized, acting through the Commodity Credit Corporation, to make available or cause to be made available, notwithstanding the provisions of any other law, such quantities of wheat and wheat-flour and at such prices as are necessary to exercise the rights, obtain the benefits, and fulfill the obligations of the United States under the International Wheat Agreement of 1949 signed by Australia, Canada, France, the United States, Uruguay, and certain wheat importing countries, along with the agreements signed by the United States and certain other countries revising and renewing such agreement of 1949 for periods through July 31, 1965 (hereinafter collectively called the “International Wheat Agreement”). Nothing in this chapter shall be construed to preclude the Secretary of Agriculture, in carrying out programs to encourage the exportation of agricultural commodities and products thereof pursuant to section 612c of this title, from utilizing funds available for such programs in such manner as, either separately or jointly with the Commodity Credit Corporation, to exercise the rights, obtain the benefits, and fulfill all or any part of the obligations of the United States under the International Wheat Agreement or to preclude the Commodity Credit Corporation in otherwise carrying out wheat and wheat-flour export programs as authorized by law. Nothing contained in this chapter shall limit the duty of the Commodity Credit Corporation to the maximum extent practicable consistent with the fulfillment of the Corporation’s purposes and the effective and efficient conduct of its business to utilize the usual and customary channels, facilities, and arrangements of trade and commerce in making available or causing to be made available wheat and wheat-flour under this chapter. The pricing provisions of section 1510(e) 1