236.49  Proceeds; how expended.--The proceeds derived from the sale of said bonds shall be held by the school board and shall be expended by the board for the purpose for which said bonds were authorized for said school district, and shall be held and expended in the manner following:

(1)  The school board shall deposit, or cause to be deposited, the proceeds arising from the sale of each issue of bonds in a separate bond construction fund account in the school depository.

(2)  All or any part of the fund derived from the proceeds of any such bond issue that in the judgment of the school board is not immediately needed may be placed in the following securities maturing not later than the time when the funds are reasonably expected to be needed:

(a)  In investments authorized in s. 236.24(2)(a) for the district school fund.

(b)  In any bonds issued by the district; provided, such bonds are not in default and can be obtained at a price which will result in a net saving to the taxpayers of the district.

(c)  In any obligations of the school board approved in accordance with the provisions of ss. 237.151, 237.161, and 237.162.

(d)  In any bonds issued by the State Board of Education or another school district.