The district treasurer shall give bond in such amount as shall be fixed by the board of supervisors, conditioned that he will well and truly account for and pay out, as provided by law, all moneys received by him as taxes from the county treasurer or treasurers and the proceeds from tax sales for delinquent taxes and from any other source whatever for the account of the district. Such bond shall be signed by at least two sureties or by some surety or bonding company approved and accepted by the board of supervisors and such bond shall be in addition to the bond for the proceeds of sales of bonds required in § 49-19-2150. The bond shall be placed and remain in the custody of the president of the board of supervisors and shall be kept separate from all papers in the custody of the secretary or district treasurer.