Idaho Code § 63-406

The state tax commission may, for the purpose of securing evidence, facts or information to enable it to properly assess any operating property, require the attendance of the person, or any officer, manager or agent of such person, whose property is to be assessed, and require him to answer, under oath, all questions propounded which, in the judgment of the commission, would assist it in fixing the value of such property, whether such person, officer, manager or agent resides within or without this state.