Such counties acting through their county commissioners shall have the right to lease such hospitals upon such terms and for such a length of time as they may decide, or to sell the same; provided, however, that no such lease or sale, except those leases entered into between such counties and the Idaho health facilities authority as provided in section 31-836, Idaho Code, shall be final or valid unless and until it has been approved by a majority of the qualified electors of said county voting on such question at an election held subject to the provisions of section 34-106, Idaho Code; except if a hospital district has been created under the provisions of chapter 13, title 39, Idaho Code, county commissioners shall have the right to lease, as provided in section 31-836, Idaho Code, such hospitals within a created hospital district to the hospital district without submitting the question of lease or sale to the qualified electors of the county or the respective hospital district.