7 U.S. Code § 7417 - Referenda
The referendum shall be conducted not later than 3 years after assessments first begin under the order.
The Secretary may conduct a referendum at any time to determine whether the continuation, suspension, or termination of the order or a provision of the order is favored by persons eligible to vote under subsection (b)(1).
A referendum conducted under this section shall be conducted in the manner determined by the Secretary to be appropriate.
If the Secretary determines that an advance registration of eligible voters in a referendum is necessary before the voting period in order to facilitate the conduct of the referendum, the Secretary may institute the advance registration procedures by mail, or in person through the use of national and local offices of the Department.
Not later than 30 days before a referendum is conducted under this section with respect to an order, the Secretary shall notify the agricultural commodity industry involved, in such manner as determined by the Secretary, of the period during which voting in the referendum will occur. The notice shall explain any registration and voting procedures established under this subsection.