Idaho Code § 15-2-601: Requirement that devisee survive testator by 120 hours.

A devisee who does not survive the testator by one hundred twenty (120) hours is treated as if he predeceased the testator, unless the will of decedent contains some language dealing explicitly with simultaneous deaths or deaths in a common disaster, or requiring that the devisee survive the testator or survive the testator for a stated period in order to take under the will.