7 U.S.C. § 1450
Section, acts Mar. 31, 1950, ch. 81, §5, 64 Stat. 42; Jan. 30, 1954, ch. 2, §5(a), 68 Stat. 7, provided that for the crop year of 1951 and thereafter, no price support would be available for Irish potatoes unless marketing quotas were in effect.