if requested by the PromoFlor Council or by a representative group comprising 30 percent or more of all qualified handlers required to pay assessments under the order, as provided in
section 6804(h)(1) of this title, shall conduct a referendum of all qualified handlers required to pay assessments under the order, as provided in
section 6804(h)(1) of this title, subject to the voting requirements of subsection (b), to ascertain whether qualified handlers favor suspension or termination of the order.