This regulation establishes time-limited tolerances for residues of indoxacarb in or on grass forage and grass hay. 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 mixed stands of alfalfa and grasses. Tolerances are already established for residues of indoxacarb in/on alfalfa forage and alfalfa hay and this regulation establishes maximum permissible levels for residues of indoxacarb in or on grass forage and grass hay. The time-limited tolerances expire on December 31, 2022.