The Secretary may conduct at any time a referendum of persons who, during a representative period as determined by the Secretary, have been fluid milk processors on whether to suspend or terminate the order, and shall hold such a referendum on request of the Board or any group of such processors that among them marketed during a representative period, as determined by the Secretary, 10 percent or more of the volume of fluid milk products marketed by fluid milk processors voting in the preceding referendum.
Subsections (c) and (d) of section 6413 of this title shall apply to a referendum conducted under this subsection.