6. Franchise revocable; irrevocability upon approval of electors.

The franchise herein granted shall be revocable at the will of the governing body of this Village, provided, however, that the same shall become irrevocable if and when confirmed by a three-fifths majority of the electors voting upon the question at the next general election or at any special election called for that purpose. Such special election shall be held at the request of said grantee.