This regulation amends the existing temporary tolerance exemption for Aspergillus flavus AF36 by establishing a permanent exemption from the requirement of a tolerance for residues of the microbial pesticide, Aspergillus flavus AF36, in or on pistachio when applied as an antifungal agent and used in accordance with good agricultural practices. On behalf of the Arizona Cotton Research and Protection Council, Interregional Research Project Number 4 submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting that EPA amend an existing temporary tolerance exemption for Aspergillus flavus AF36. This regulation eliminates the need to establish a maximum permissible level for residues of Aspergillus flavus AF36 under the FFDCA.