iv ng-hide="true" class="form-group">
              <label>Require Voter Sign-in:<span ng-hide="ballot.requireSignIn"> (with either Google or Facebook)</span>
                <input type="checkbox" ng-model="ballot.requireSignIn">
              </label>
              <div ng-show="ballot.requireSignIn">
                <div class="input-group"><span class="input-group-addon">Max votes per person</span>
                  <input type="number" ng-model="ballot.maxVotes" class="form-control" value=2>
          