This rule establishes tolerances for residues of the insecticide phosphorothioic acid, 0,0-diethyl 0-(1,2,2,2- tetrachloroethyl) ester (proposed common name, ``chlorethoxyfos''), in or on the raw agricultural commodities of field, pop, and sweet corn at 0.01 part per million (ppm). E.I. Du Pont de Nemours & Co. submitted a petition for the regulation to establish these maximum permissible levels for residues of the insecticide pursuant to the Federal Food, Drug and Cosmetic Act (FFDCA).