The tenure of office of said commissioners shall be at the pleasure of the governor, and their remuneration and expenses shall be fixed by him; provided, however, that if the states of Utah and Wyoming shall appoint but one (1) commissioner to perform such services for said respective states, then and in that event, the governor of the state of Idaho may, in his discretion, reduce the number of commissioners of the state of Idaho from three (3) to one (1), who shall exercise all the rights and duties imposed by this act.
Idaho Code § 42-3306