This rule establishes an exemption from the requirement of a tolerance for residues of the biochemical cinnamaldehyde in or on all food commodities when applied as a broad spectrum fungicide/ insecticide/algaecide in accordance with good agricultural practices. The Interregional Research Project No. 4 (IR-4) submitted a petition to EPA on behalf of Proguard, Inc., under the Federal Food, Drug and Cosmetic Act as amended by the Food Quality Protection Act of 1996 (FQPA) (Pub. L. 104-170) requesting the exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of cinnamaldehyde. The Agency also removes the mushroom- specific tolerance exemption for cinnamaldehyde (40 CFR 180.1156) and considers this tolerance to be reassessed, as required by the FQPA.