Authority for the conduct and supervision of Federal programs to assist schools in providing food service programs for children is assigned to the Department of Agriculture. To the extent practicable, other Federal agencies administering programs under which funds are to be provided to schools for such assistance shall transfer such funds to the Department of Agriculture for distribution through the administrative channels and in accordance with the standards established under this chapter and the Richard B. Russell National School Lunch Act [42 U.S.C. 1751 et seq.].