415 ILCS 5/3.495

"Transfer container" means a reusable transportable shipping container that is completely covered or enclosed, that has a volume of not less than 250 cubic feet based on the external dimensions, and that is constructed and maintained to protect the container contents (which may include smaller containers that are or are not transfer containers) from water, rain, and wind, to prevent the free movement of rodents and vectors into or out of the container, and to prevent leaking from the container.