Upon the finding of a two-thirds vote of the commission that the operation of this chapter has not tended to effectuate its declared purposes, the commission may recommend to the secretary that the operation of this chapter shall be suspended. However, any suspension shall not become effective until the expiration of the current marketing season. The secretary shall, upon receipt of that recommendation, or may, after a public hearing to review a petition filed with the secretary requesting suspension, signed by 15 percent of the producers by number who produced not less than 15 percent of the volume in the immediately preceding season, cause a referendum to be conducted among the listed producers to determine if the operation and the operations of the commission shall be suspended, and shall establish a referendum period, which shall not be less than 10 or more than 60 days in duration. The secretary may prescribe any additional procedures that may be necessary to conduct a referendum. At the close of the established referendum period, the secretary shall tabulate the ballots filed during the referendum period. If at least 40 percent of the total number of producers from the list established by the secretary participate in the referendum, the secretary shall continue the operation of this chapter, if the secretary finds either one of the following: