During the 60-day period immediately preceding the proposed effective date of the order issued under section 8703 of this title, the Secretary shall conduct a referendum among manufacturers eligible under subsection (b)(2) subject to assessments under section 8705 of this title.

The order shall become effective only if the Secretary determines that the order has been approved by a majority of manufacturers voting who also represent a majority of the machine cavities in operation of those manufacturers voting in the referendum.