Idaho Code § 31-4110
The board of county commissioners, on the creation of the district, and as part of the order creating the district, shall appoint a board of not less than five (5) nor more than nine (9) trustees to administer the affairs of the district. Each of the trustees shall be a resident real property owner from within the translator district. The trustees appointed at the time of the creation of the district shall be appointed for staggered terms of one (1), two (2), and three (3) years in the discretion of the board of county commissioners and if more than one (1) county is involved, at least one (1) of the trustees shall be appointed from each county or portion of county included within the district. The trustees appointed at the time of formation of the district shall hold office for the term of their respective appointment or until his successor is appointed and qualified; at the end of the respective terms of the trustee, the then board of county commissioners shall appoint a new trustee for a three (3) year term, and in the event of a vacancy by death, resignation, removal from the district or otherwise, a trustee shall be appointed by the board of county commissioners to fill the vacancy to the end of the term of the trustee causing the vacancy.
Idaho Code § 31-4110