Idaho Code § 39-1355
The ownership and operation of any municipal, city/county, county, district, or tax supported community hospital or medical clinic may be consolidated with an established hospital district by majority vote of the qualified electors of the established hospital district and of the political subdivision having jurisdiction over such other tax supported hospital according to procedure set forth in section 39-1354, Idaho Code. A true copy of the petition and the established hospital district board's notice of approval or disapproval shall be sent to the governing body of the political subdivision having jurisdiction over a petitioning hospital. A true copy of that petition shall, at the same time, be sent to the governing body of the nonpetitioning hospital. When the notice carries the approval of the boards, or other governing bodies of both hospitals, that governing body shall conduct the election and give notice of the results to the hospital district board and the relevant boards of county commissioners as provided in section 39-1354, Idaho Code. As a result of any such consolidation, the boundaries of the hospital district remaining after consolidation shall be expanded to include the political subdivision which previously had jurisdiction over the consolidated hospital or medical clinic.
Idaho Code § 39-1355