The board of trustees of any district may issue improvement certificates and drainage bonds under the same conditions as is provided by chapter 46A-11 for issuance by the board of county commissioners, except that in case of the issue of drainage bonds, the bonds shall be approved by a simple majority of the eligible landowners voting in a special election held by the board of trustees in conjunction with the district's annual election. The approval shall be printed upon the bonds before they are negotiated.
SDCL 46A-10A-120