1993—Pub. L. 103–189 designated existing provisions as subsec. (a), added subsec. (b), and in subsec. (a) substituted “, handlers, and importers” for “and handlers” in two places and “, handling, or importing” for “or handling” in first sentence, substituted “, handler, or importer” for “or handler” and “, handled, or imported” for “or handled” in sentence beginning with “The ballots”, and struck out after first sentence “The referendum shall be conducted at the county extension offices. No plan issued under this chapter shall be effective unless the Secretary determines that the issuance of the plan is approved or favored by not less than two-thirds of the producers and handlers voting in such referendum, or by the producers and handlers of not less than two-thirds of the watermelons produced and handled during the representative period by producers and handlers voting in such referendum, and by not less than a majority of the producers and a majority of the handlers voting in the referendum.”