No question submitted to the electors under this Charter shall be passed or carried unless a majority of the electors voting on the question shall vote in favor thereof, and if any State law governing such election shall require more than a majority vote the percentage of vote required to pass the measure under the State law shall govern in the absence of an ordinance of Council otherwise providing. The form of ballot to be used on all questions submitted to the electors shall be prescribed by Council at the time the question is certified to the proper election officials for the calling of the election.