WAC 296-806-42550. Follow these requirements for food grinders and cutters

You must make sure that food grinders and cutters: (1) Have an interlock so machines with removable hoppers cannot be operated when the hopper is removed. (2) Limit access to hoppers where grid guards cannot be used by providing feed conveyors or baffle-type hoppers. Hoppers must be both: (a) Enclosed and provided with hinged covers; and (b) Equipped with an electric interlock so the machine will not operate with the cover open.