This regulation establishes an amendment to an exemption from the requirement of a tolerance for residues of sodium metasilicate on all food commodities when applied/used as an insecticide or fungicide to control or suppress leafhoppers and powdery mildew in accordance with approved label rates and good agricultural practice. A petition was submitted to EPA on behalf of Environmentally Safe Systems, Inc. under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of sodium metasilicate.