Every five years, commencing with the fifth year following certification of the commission, the secretary shall hold a hearing to determine whether the operation of this chapter should be continued. If the secretary finds after the hearing that a substantial question exists among eligible persons regarding whether the operation of this chapter should be continued, the secretary shall submit the chapter to a reapproval referendum. If a reapproval referendum is required, the operation of this chapter shall be continued in effect if the secretary finds that a majority of the eligible persons voting in the referendum voted in favor of continuing this chapter.