321.244.  Reduced tax levy may be increased to maximum limits, by elections, ballot form. — 1.  Any fire protection district which has revised or reduced any levy which it has been authorized to impose under the provisions of section 321.225, 321.240, 321.241, 321.243, 321.246, 321.610, or 321.620, under any provision of the constitution or laws of this state, may increase each such revised or reduced levy up to, but not in excess of, the maximum limits allowed under the section authorizing the rate of levy sought to be increased by submitting the following proposition to the voters of the district at any primary, general or special election:

  2.  If any of the propositions submitted under subsection 1 of this section is approved by a majority of the voters of the district voting thereon, the board of directors may increase the levy which was the subject of such proposition to the amount authorized by such proposition.