in accordance with subsection (a). (g) Exclusive authority of the Secretary Nothing in this section shall be construed to alter or modify the authority of the Secretary to use methyl bromide for quarantine and pre-shipment, without limitation, under the Clean Air Act. (h) Definitions (1) Emergency event The term emergency event means a situation— (A) that occurs at a location on which a plant or commodity is grown or produced or a facility providing for the storage of, or other services with respect to, a plant or commodity