Idaho Code § 1-208: Terms and places of holding Supreme Court.

The Supreme Court, or any three (3) of the justices thereof, may, by an order, fix the times for holding the terms of the Supreme Court, which shall not be changed oftener than once in each year, except as herein provided. At least six (6) terms shall be held annually; two (2) terms at the seat of the state government, one (1) term at Lewiston, in Nez Perce County, one (1) term at Coeur d’Alene, in Kootenai County, one (1) term at Twin Falls, in Twin Falls County, and one (1) term at Pocatello, in Bannock County.