This regulation extends the effective date for a temporary exemption from the requirement of a tolerance for residues of Bacillus thuringiensis eCry3.1Ab protein in corn, in or on the food or feed commodities of corn; corn, field; corn, sweet; and corn, pop, when used as a plant-incorporated protectant in accordance with the terms of Experimental Use Permit (EUP) No. 67979-EUP-8. Syngenta Seeds, Inc. submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting to extend the existing temporary tolerance exemption for Bacillus thuringiensis eCry3.1Ab protein in corn that was set to expire on March 1, 2013. This regulation eliminates the need to establish a maximum permissible level for residues of Bacillus thuringiensis eCry3.1Ab protein in corn under the FFDCA. The temporary tolerance exemption now expires on December 31, 2013.