When the business of the meeting is concluded, the moderator shall announce that fact. After the announcement is made, all miscellaneous business shall be deemed concluded for that day unless the electors shall, at the time of the announcement, order otherwise. In no event, however, shall any question which has been disposed of before the announcement be thereafter reconsidered unless the motion for reconsideration is sustained by a number of votes equal to at least a majority of all the names entered on the poll list on that day up to the time the motion is made.