Idaho Code § 21-806
At the next succeeding primary election following the creation of any such regional airport authority, the electors of each of the legislative districts within the participating counties within such region shall elect, on a nonpartisan basis, a member of the authority's permanent board of trustees, hereinafter referred to as the board, except that in the northern and north central regions, one (1) additional board member shall be elected from each such region at large. At the first such election, members elected from even-numbered legislative districts, together with the member elected at large from the northern region and the member elected at large from the north central region, shall be elected for four (4) year terms of office, and members elected from odd-numbered legislative districts shall be elected for two (2) year terms of office. Thereafter all such members shall be elected for four (4) year terms of office, and shall serve until their successors are elected and qualified. The term of office of members so elected shall commence on December 1 of the year in which they were elected.
Notice of the election and the conduct thereof shall be as prescribed in chapter 14, title 34, Idaho Code. As a condition of voting, an elector shall meet the qualifications prescribed in section 34-402, Idaho Code, and in addition shall be a resident of the regional airport authority.
In any election for member of the board, if after the deadline for filing a declaration of intent as a write-in candidate, it appears that only one (1) qualified candidate has been nominated for that office, it shall not be necessary for the candidate to stand for election and the board shall declare such candidate elected as a member of the board and the secretary of the district shall immediately make and deliver to such person a certificate of election.
The person receiving the largest number of votes shall be declared elected. If it be necessary to resolve a tie between two (2) or more persons, the interim board or the permanent board, as the case may be, shall determine by lot which thereof shall be declared elected. The clerk of the board shall promptly notify any person by mail of his election, enclosing a form of oath to be subscribed by him as herein provided.
Elections held pursuant to this section shall coincide with other elections held by the state of Idaho or any subdivision thereof, or any municipality or school district, subject to the provisions of sections 34-106 and 34-1401, Idaho Code.
Elections of board members shall, after the first such election, be held every other year in even-numbered years, and shall be held on such uniform day consistent with the provisions of section 34-106, Idaho Code, as the board shall determine. Vacancies on the board shall be filled by appointment of remaining members, for the expiration of such term of office. The board members shall take and subscribe the oath of office required in the case of state officers and said oath shall be filed with the secretary of state. Members shall be reimbursed for actual and necessary expenses incurred in the performance of their official duties.
Idaho Code § 21-806