Idaho R. App. P. 39
As amended through September 30, 2024
Upon receipt by the Clerk of the Supreme Court of a mandate from the Supreme Court of the United States, the Clerk shall immediately notify respective counsel in writing of such fact and the date thereof. Unless further proceedings are required in the Idaho Supreme Court, at the expiration of 21 days from said date the Clerk shall issue a remittitur to the district court in which the judgment was rendered commanding such court to take appropriate action. All of the costs subsequent to the appeal from said district court shall be taxed in such remittitur.
Id. App. R. 39