20-3-354. Redetermination of additional trustee positions and subsequent adjustments. Whenever there is a revision of the taxable valuation of the high school district or the elementary districts within the high school district or there is a reclassification of the elementary district that has its trustees placed on the high school district board of trustees, the county superintendent shall redetermine the number of additional trustee positions for the high school district in accordance with 20-3-352. If there is a change in the allowable number of additional trustee positions, the county superintendent shall reestablish the trustee nominating districts in accordance with 20-3-353. If the number of additional trustee positions is less than the previous number of positions, the county superintendent shall designate which present additional positions are to terminate upon the order reestablishing the trustee nominating districts. If the number of additional trustee positions is more than the previous number of positions, the additional trustee positions must be filled in the manner prescribed under the provisions of 20-3-309. Each additional trustee position filled by appointment under this section is subject to election at the next regular school election.