Thereupon, the board of supervisors, by an order entered in its minutes, shall provide for the issuance and sale of bonds of the district in the amount approved by the electors of the district at the election and shall provide for the payment of the proceeds of the sale of the bonds into the county treasury to the credit of a special fund known as the memorial district bond fund which shall be used for the purposes specified in the order of the board of directors calling the special election and shall be expended upon warrants of the county auditor.