1. The board of supervisors, or the city councils of a district composed only of cities, may, and upon receipt of a petition signed by eligible electors residing in the district equal in number to at least five percent of the registered voters in the district shall, submit a proposition to the electorate residing in the district at any general election or at a special election held throughout the district. The proposition shall provide for the establishment of a public safety fund and the levy of a tax on taxable property located in the district at rates not exceeding the rates specified in this section for the purpose of providing additional moneys for the operation of the district.

Terms Used In Iowa Code 28E.22

 2. The ballot for the election shall be prepared in substantially the form for submitting special questions at general elections and the form of the proposition shall be substantially as follows:

 Shall an annual levy, the amount of which will not exceed a rate of one dollar and fifty cents per thousand dollars of assessed value of the taxable property in the unified law enforcement district be authorized for providing additional moneys needed for unified law enforcement services in the district?  Yes ……..  No  ……..
 3. If a majority of the registered voters in each city and the unincorporated area of the county voting on the proposition approve the proposition, the county board of supervisors for unincorporated area and city councils for cities are authorized to levy the tax as provided in section 28E.23.
 4. Such moneys collected pursuant to the tax levy shall be expended only for providing additional moneys needed for unified law enforcement services in the district and shall be in addition to the revenues raised in the county and cities in the district from their general funds which are based upon an average of revenues raised for law enforcement purposes by the county or city for the three previous years. The amount of revenues raised for law enforcement purposes by the county for the three previous years shall be computed separately for the unincorporated portion of the district and for each city in the district.