1. All provisions of a reorganization plan, except those relating to boundaries and geographic voting areas, may be changed upon the concurrence of a majority of the qualified electors voting on the question. The question may be placed before the voters at a regular or special election upon a motion of the school board and shall be placed before the voters upon receipt by the board of a petition signed by at least:

a.    Twenty-five percent of the qualified electors residing in the district, if the population of the district, as determined by the county superintendent, is less than twenty-five qualified electors; b.    Twenty percent of the qualified electors residing in the district, if the population of the district is at least twenty-five but not more than four thousand; or

c.    Fifteen percent of the qualified electors residing in the district, if the population of the district is greater than four thousand.

2.    Notwithstanding the provisions of subsection 1, if a school district has been reorganized for at least ten years, the boundaries of geographic voting areas may be changed upon the concurrence of a majority of qualified electors voting on the question.

3.    By resolution, the board in a reorganized district may change to at large voting for school board members if there is a variance of more than ten percent in the population between any of the district’s established geographic areas with resident candidates.