Idaho Code § 31-3702
The governing bodies of said county and city, when they deem the welfare of their respective municipalities requires it, and when petitioned thereto by a number of taxpayers, in the case of the city equal to thirty per cent (30%) of the number of persons voting for mayor of said city at the last city election held therein, and in the case of the county, when petitioned thereto by a number of resident taxpayers of such county equal to thirty per cent (30%) of the number of persons voting for the secretary of state of the state of Idaho at the last election preceding the date of such petition, shall submit to the qualified electors of such city or county, as the case may be, at any general election to be held therein, or at an election called therein by the governing bodies of such city or county, subject to the provisions of section 34-106, Idaho Code, the proposition whether the negotiable coupon bonds of such city and/or county to the amount stated in such proposition shall be issued and sold for the purposes mentioned and described in section 31-3701, Idaho Code; Provided, however, in case that either such city or county entering into such contract provided for in section 31-3701, Idaho Code, shall have already voted bonds of such city or county for the purpose of building therein a hospital, such city or county shall be authorized to use the proceeds of such bonds so already voted to pay for its proportionate part of the cost and expense of building, maintaining and operating the facilities provided for in section 31-3701, Idaho Code.
Idaho Code § 31-3702