Notwithstanding ORS 198.910, when, at an election on consolidation or merger, a majority of the votes cast in each affected district is in favor of merger or consolidation or when merger or consolidation of districts is approved by a final order of a local government boundary commission, if two or more of the affected districts each have 20 percent or more of the electors or owners of land within the successor or surviving district, then each such affected district shall be represented on the board elected under ORS 198.910 as follows:
(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.