That upon filing of the engineer’s report provided for in the next preceding section, the board of directors shall carefully examine and consider same; and if they approve the same and determine that the proposed work or any part thereof ought to be done, and the cost thereof defrayed by issuing bonds to be paid by general taxation, and that the estimated cost thereof does not exceed the amount for which such bonds may be issued, then the board of directors shall proceed forthwith to call a special election as herein provided to vote upon the question of issuing such bonds, and if the issue of bonds be authorized by the electors, then the board of directors shall cause such work to be done and authorize the issuance of bonds to pay all costs thereof, including legal, engineering and other special costs: Provided, That no such election shall be required upon the question of issuing such bonds if the owners of all of the land located within the district shall give their consent thereto in writing. Such statement of consent shall specify the amount of bonds, the rate of interest the same shall bear and the purpose for which the proceeds are to be expended. That whenever the board of directors deem it necessary to authorize the issuance of bonds to be paid by general taxation, which issue requires the sanction of the taxpayers, it shall make an entry on its journal so declaring and an order calling an election for that purpose; such order shall specify the amount of bonds necessary to be issued, the rate of interest the same shall bear, the time when payable and the purpose for which the proceeds are to be expended, the time and place where such election is to be held, and shall appoint judges and clerks to conduct the same: Provided, That unless consented to in writing by the owners of at least ninety percent (90%) of the total area of land in the improvement district, no such district shall have the power to authorize the issuance of bonds to be paid by a general levy or the levy of special taxes or assessments nor to levy special taxes or assessments where the density of population thereof, as determined by the county clerk of the county in which said district is situated, on the basis of the assessment rolls for the last assessment made for said county does not exceed one (1) resident for each five (5) acres of land, including platted land and unplatted land, situated within said district.

A proclamation calling such election shall be published at least ten (10) days before the day fixed for holding the same, in some newspaper published in the county; such proclamation shall prescribe the form of the ballot, state the time and place when and where the election will be held, and shall contain a copy of the order of the board of directors calling the same; and at the time appointed the election shall be conducted, the returns made and the results ascertained in the manner as provided by law for general county elections, except that the returns shall be made to and canvassed by the board of directors of the district, and except as herein otherwise provided. The board of directors shall meet and canvass the returns of all such elections and declare the result, and if a majority of those voting at the election authorize the issuing of the bonds the board of directors shall have power to authorize the issuance of the same and cause the work for which they were authorized to be done.