Idaho Code § 31-847
The board of commissioners may grant to any county officer of their respective counties leave of absence from their county and the state, for a period not exceeding ninety (90) days, during which time the absence of such officer does not work forfeiture of his office; provided, that before the granting of such leave of absence, the officer (except county commissioners) must appoint a deputy to perform the duties of his office, as by statute in such cases made and provided, and must present to, and file with, the board of commissioners of his county the written consent of each person liable on his official bond, that such leave of absence be granted; be it further provided, that no leave of absence shall be granted to more than any one (1) county commissioner at the same time; providing, however, that where any elective or appointive county officer is required to absent himself by reason of being a member of the armed forces of the nation or by reason of official call to service in civilian war work, such period of absence shall not exceed the date of the next succeeding general election, such absence shall not work forfeiture of the office of such officer, and such absence shall suspend the salary of such officer during such period, except that the board may adopt a policy by which such officer may, for periods of absence not to exceed four (4) weeks per year, receive his or her regular salary reduced by an amount equal to any monetary compensation received for the performance of such military or civilian war work. For purposes of this section, appointive county officers do not include deputies appointed pursuant to section 31-2003, Idaho Code.
Idaho Code § 31-847