Idaho Code § 31-4214
An authority shall have the right to acquire, by the exercise of the power of eminent domain, any real property which it may deem necessary for its purposes under this act after the adoption of a resolution declaring that the acquisition of the real property described therein is necessary for such purposes. An authority may exercise the power of eminent domain in the manner provided in chapter 7, title 7, Idaho Code, and acts amendatory thereof or supplementary thereto; or it may exercise the power of eminent domain in the manner provided by any other applicable statutory provisions for the exercise of the power of eminent domain. Property already devoted to a public use may be acquired in like manner, provided that no real property belonging to a city, the state or any political subdivision thereof may be acquired without its consent.
Idaho Code § 31-4214