Neb. Rev. Stat. § 71-1622
Any health district organized pursuant to sections 71-1601 to 71-1625 may not borrow money and issue bonds therefor unless the issuance of the bonds has been submitted to the vote of the people of the district at a regular or special election and has been approved by a majority of the electors voting on the proposition, or an emergency has been declared, as provided in section 71-1621, and their issuance has been approved by the county board, in addition to the health board. In the event either of these two conditions has been met and bonds are issued, they shall not run for longer than fifteen years, shall bear interest, and shall provide for optional payment in whole or in part on or after five years from the date of issuance thereof.
Neb. Rev. Stat. § 71-1622