Notwithstanding Section 5019, Section 5019.5, or Chapter 2 (commencing with Section 21100) of Division 21 of the Elections Code, whenever the boundaries of a county high school district are coterminous with the boundaries of a county, the board shall consist of one member from each supervisorial district in the county elected at large from the district, and the high school district shall not go through a redistricting process separate from the process for redistricting the county board of supervisors.