Idaho Code § 61-201
There is hereby created a state commission to be known and designated as the Idaho public utilities commission. The commission shall be comprised of three (3) members appointed by the governor, with the approval of the senate. Not more than two (2) members of said commission shall belong to the same political party. The members of the first commission after taking effect of this act shall be appointed for terms beginning with the effective date of this act and expiring as follows: Two (2) commissioners for a term expiring the second Monday in January, 1953, and one (1) commissioner for a term expiring the second Monday in January, 1955. Each of the commissioners shall hold office until his successor is appointed and qualified. On the second Monday in January, 1961, the governor shall appoint one (1) commissioner for a four (4) year term and one (1) commissioner for a six (6) year term, and on the second Monday in January, 1963, the governor shall appoint one (1) commissioner for a six (6) year term. On the second Monday in January of each second year after the year of 1963, the governor shall appoint one (1) commissioner for a six (6) year term. Whenever a vacancy in the office of commissioner shall occur, the governor shall forthwith appoint a qualified person to fill the same for the unexpired term. If any appointment is made during the recess of the legislature it shall be subject to confirmation by the senate during its next ensuing session.
Idaho Code § 61-201