Idaho Code § 72-1502
The president pro tempore of the senate, the speaker of the house of representatives, and the minority leaders of the senate and the house of representatives shall each designate one (1) member of the commission and the state chairmen of the two (2) largest political parties, determined by the vote cast for governor in the last gubernatorial election, shall each designate one (1) member of the commission. Appointing authorities should give consideration to achieving geographic representation in appointments to the commission. If an appointing authority does not select the members within fifteen (15) calendar days following the secretary of state's order to form the commission, such members shall be appointed by the supreme court.
Should a vacancy on the commission occur during the tenure of a commission, the secretary of state shall issue an order officially recognizing such vacancy. The vacancy shall be filled by the original appointing authority within fifteen (15) days of the order. Should the original appointing authority fail to make the appointment within fifteen (15) days, the vacancy shall be filled by the supreme court.
No person may serve on the commission who:
A person who has served on a commission for reapportionment shall be precluded from serving in either house of the legislature for five (5) years following such service on the commission and shall be precluded from serving on a future commission for reapportionment unless the commission is reconstituted because a court of competent jurisdiction has invalidated a plan of the commission and the commission is required to meet to complete a reapportionment or redistricting plan. This limitation on serving on a future commission for reapportionment shall apply on and after January 1, 2001.
Idaho Code § 72-1502