If a majority of the votes cast on the question of the adoption of the county consolidated form of government are in favor of that form, it becomes effective on the first day of January next succeeding the election. All elected officers whose offices become appointive under this chapter shall continue in office until their successors are appointed pursuant to the provisions of this chapter. The question of the discontinuance of the county consolidated office form of government may be submitted to the electors at the next primary election through the same procedures set forth in this chapter for adopting that form of government. On the first day of January following a vote to discontinue, the county reverts to the form of government of the county immediately preceding adoption of the consolidated office form of government, with all offices made appointive under this chapter subject to election at the last preceding general election, or to another optional form of county government adopted by the electors as provided by law.