In any school feeding programs undertaken on and after outside the United States pursuant to , section 308 of Public Law 480 (83d Congress), as amended, and , the Secretary shall receive assurances satisfactory to him that, insofar as practicable, there will be student participation in the financing of such programs on the basis of ability to pay, and such programs shall be undertaken with the understanding that commodities will be available for those programs only in accordance with the provisions of such statutes and that commodities made available under will be available only in accordance with the priorities established in such section.section 1431 of this titlesection 1431b of this titlesection 1431 of this titleSeptember 27, 19621962-09-27