(a) Each person who is a producer, as defined in this subpart, at the time of the referendum, who was engaged in the production of commercial eggs during the representative period, and who is not exempt from the provisions of the order as provided for in § 1250.348 thereof, shall be entitled to only one vote in the referendum.

(b) Proxy voting is not authorized, but an officer or employee of a corporate producer, or an administrator, executor, or trustee of a producing estate, or an authorized representative of any other entity may cast a ballot on behalf of such producer or estate. Any individual so voting in a referendum shall certify that such individual is an officer or employee of the corporate producer, or an administrator, executor, or trustee of the producing estate, or an authorized representative of such other entity, and that such individual has the authority to take such action. Upon request of the referendum agent, the individual shall submit adequate evidence of his authority.

(c) Each producer shall be entitled to cast only one ballot in the referendum.