Handle means to engage in:

(a) Receiving pistachios;

(b) Hulling and drying pistachios;

(c) Further preparing pistachios by sorting, sizing, shelling, roasting, cleaning, salting, and/or packaging for marketing in or transporting to any and all markets in the current of interstate or foreign commerce; and/or

(d) Placing pistachios into the current of commerce from within the production area to points outside thereof: Provided, however, that transportation within the production area between handlers and from the orchard to the processing facility is not handling.