The representation on the board of directors of the conservancy district shall be apportioned as follows:
A. three members shall be elected from and by the qualified electors of the most populous county within the conservancy district;
B. one member each shall be elected from and by the qualified electors of those portions of each of the remaining counties in the conservancy district; and
C. one member shall be elected from and by the qualified electors of the conservancy district at large.