(1) The trustees of a county high school district must include the following:
(a) four trustee positions filled by members residing in the elementary district where the county high school building is located; and
(b) three trustee positions filled by members one of whom resides in each of the three trustee nominating districts in the territory of the high school district outside of the elementary district where the county high school building is located. The county superintendent shall establish the nominating districts, and, unless it is impossible, the districts must have coterminous boundaries with elementary district boundaries.
(2) The provisions of 20-3-305 govern the nomination of candidates for the trustee election prescribed in this section.