1. The funds necessary for payment of any obligation of the county in connection with the establishment, operation and maintenance of the emergency communications system may be paid by the county out of the fund established pursuant to section 650.402, or from bonds issued pursuant to this section.

2. For the purpose of supporting the operation and other purposes of the commission and the emergency communications system, the county may issue bonds for and on behalf of the county, payable out of funds derived from the sales tax authorized in sections 650.396 and 650.399 or from taxation of all taxable real property in the county, up to an amount not exceeding six percent of the assessed valuation of such property, with such evaluation to be ascertained by the assessment immediately prior to the most recent assessment for state and county purposes, or from revenue generated from any other tax or fee authorized and approved by the voters pursuant to section 650.399. Such bonds shall be issued in denominations of one hundred dollars, or some multiple thereof, and the provisions of section 108.170 to the contrary notwithstanding, such bonds may bear interest at a rate determined by the emergency communications system commissioners, payable semiannually, to become payable no later than twenty years after the date of the bonds.

3. Whenever the board of commissioners of any such emergency communications district proposes to issue bonds pursuant to subdivision (3) of subsection 2 of this section, they shall submit the question to the voters in the district pursuant to this section. The notice for any such election shall, in addition to the requirements of chapter 115, state the amount of bonds to be issued.

4. The question shall be submitted in substantially the following form:

5. The result of the election on the question shall be entered upon the records of the county. If it shall appear that four-sevenths of the voters voting on the question shall have voted in favor of the issue of the bonds, the commissioners shall order and direct the execution of the bonds for and on behalf of such county and the commission. If the general law of the state is such that an amount other than a four-sevenths majority is required on ballot measures of such type, the amount set by the general law of the state shall control.

6. The county shall not sell such bonds for less than ninety-five percent of the par value thereof, and the proceeds shall be paid over to the county treasurer, and disbursed on warrants drawn by the president or vice president of the board of commissioners and attested by the secretary. The proceeds of the sale of such bonds shall be used for the purpose only of paying the cost of holding such election, and constructing, repairing and maintaining the emergency communications system and its appurtenances.

7. Such bonds shall be payable and collectible only out of moneys derived from tax revenues authorized by section 650.399, from the sale of such bonds or from interest that may accrue on funds so derived while on deposit with any county depositary. The county treasurer shall hold in reserve, for payment of interest on such bonds, a sufficient amount of the money so derived that may come into his or her hands in excess of the amount then necessary to pay all bonds and interest then past due, to pay all interest that will become payable before the next installment of such special tax becomes payable, and three percent of the principal amount of the bonds not then due. The county treasurer shall, whenever any of the bonds or interest thereon become due, apply such money as may be in his or her custody and applicable thereto, or that may thereafter come into his or her custody and be applicable thereto, to payment of such bonds and interest as may be due and unpaid.

8. All money derived from the tax authorized pursuant to section 650.399 shall be used in paying the bonds and the interest thereon, except that the money that may be collected pursuant to such tax in excess of the amount necessary to pay all bonds then past due and such bonds and interest as will become payable before another assessment of such tax becomes payable may, less an amount equal to three percent of the principal amount of the bonds not then due, be used for the purposes authorized in section 650.411.

9. The county treasurer shall, as such bonds are sold, deliver them to the purchaser upon being ordered to do so by the commissioners. The county treasurer shall cancel bonds as such bonds are paid, and shall deliver them to the clerk of the county.