7 C.F.R. § 1223.71
(a) Required referendum. For the purpose of ascertaining whether the persons subject to this subpart favor the continuation, suspension, amendment, or termination of this subpart, the Secretary shall conduct a referendum among persons subject to assessments under § 1223.52 who, during a representative period determined by the Secretary, have engaged in the production or importation of pecans:
(b) Subsequent referenda. The Secretary shall conduct subsequent referenda: