(1) By one member when the percentage of electors or owners of land in the affected district is at least 20 percent but less than 40 percent of the electors or owners of land within the successor or surviving district.
(2) By two members when the percentage of electors or owners of land in the affected district is at least 40 percent but less than 60 percent of the electors or owners of land within the successor or surviving district.
(3) By the number of board members remaining after apportionment of board members under subsections (1) and (2) of this section when, among all of the affected districts, the percentage of electors or owners of land in the affected district is the highest percentage of electors or owners of land within the successor or surviving district. [1997 c.590 §5]