This regulation extends a time-limited tolerance for combined residues of the fungicide propiconazole and its metabolites in or on avocado at 10 parts per million (ppm) for an additional 3-year period. This tolerance will expire and is revoked on December 31, 2019. This action is in response to EPA's granting of an emergency exemption under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of the pesticide on avocado trees. In addition, the Federal Food, Drug, and Cosmetic Act (FFDCA) requires EPA to establish a time-limited tolerance or exemption from the requirement for a tolerance for pesticide chemical residues in food that will result from the use of a pesticide under an emergency exemption granted by EPA under FIFRA.