Idaho Code § 34-2419
In each primary and general election when two (2) or more persons are candidates for nomination or election to the same office, the county clerk or the clerk of a city, district or other municipality in which voting machines or vote tally systems are used shall rotate the names of candidates as directed by the secretary of state.
[34-2419, added 1970, ch. 140, sec. 150, p. 351.]