(1)    Except as provided in sub. (2) in the case of voting machine ballots, whenever any county clerk or municipal or school district clerks within the same county are directed to publish any notice or portion of a notice under this chapter on the same date in the same newspaper, the text of which is identical, the clerks may publish one notice only. The cost of publication of such notice or the portion of the notice required shall be apportioned equally between the county and each municipality or school district sharing in its publication.

   (2)   When a voting machine ballot or ballot to be used with an electronic voting system includes 2 or more levels of government, the cost of giving the type B notice shall be prorated under s. 5.68 (3).