(3) When the county superintendent has received the trustees' resolutions or a valid petition, the county superintendent shall, within 10 days after the receipt of the last resolution or petition and under the provisions of 20-20-201, order the county high school to call an election to consider a unification proposition. The trustees of the county high school shall call and conduct an election in the manner prescribed in this title for school elections. An elector who may vote on the unification proposition must be qualified to vote under the provisions of 20-20-301. The ballot for a county high school unification proposition must be substantially in the following form: "OFFICIAL BALLOT
COUNTY HIGH SCHOOL UNIFICATION ELECTION
Shall.... County High School be unified with District No....., .... County to establish a unified school system under a unified board of trustees?
[ ] FOR the unification of the county high school.
[ ] AGAINST the unification of the county high school."