When an electronic voting system is used, the County Board or Board of Election Commissioners may retain existing precincts or may consolidate, combine, alter, decrease or enlarge the boundaries of the precincts so as to change the number of registered voters of the precincts using the electronic voting system, establishing the number of registered voters within each precinct at such number not to exceed 800 as the appropriate County Board or Board of Election Commissioners, determines will afford adequate voting facilities and efficient and economical elections.
     Except in the event of a fire, flood or total loss of heat in a place fixed or established pursuant to law by any County Board or Board of Election Commissioners as a polling place for an election, no election authority shall change the location of a polling place so established for any precinct after notice of the place of holding the election for that precinct has been given as required under Article 12 unless the election authority notifies all registered voters in the precinct of the change in location by first class mail in sufficient time for such notice to be received by the registered voters in the precinct at least one day prior to the date of the election.