The township treasurer or township land commissioners, as the case may be, shall keep the principal of the township fund loaned at interest. The rate of interest, which shall not be less than four per cent per annum, payable annually, except in the case of investments in war bonds of the United States government, shall be determined by a majority of the trustees of schools at any regular or special meeting. No loan shall be made for less than one year nor more than 5 years but investments secured by mortgage, notes, or bonds, insured by the Federal Housing Administrator, or debentures issued by him, or in bonds or other obligations of National Mortgage Associations, may be for longer than 5 years. All loans shall be secured by mortgage on unencumbered realty situated in this State, worth at least 50% more than the amount loaned, with a condition that in case additional security shall be required at any time it shall be given to the satisfaction of the trustees of schools. In estimating the value of realty mortgaged to secure the payment of money loaned, the value of improvements liable to be destroyed may be included; but in such case the improvements shall be insured for their insurable value in a responsible insurance company or companies, and the policy or policies shall be transferred to the trustees of schools as additional security, and shall be kept so insured until the loan is paid. The township treasurer or township land commissioners, as the case may be, also may invest the principal of the township fund in:
He or they may exchange mortgages in default for bonds of the Home Owners' Loan Corporation.
He or they may invest moneys in the operations and maintenance fund of any school district in war bonds of the United States government that are redeemable at the owner's option, in cases where building projects cannot, by reason of material shortages or wartime priority restrictions, currently be undertaken or completed. School funds held by the treasurer of a district created by any special act shall be invested according to the provisions of this Section.
105 ILCS 5/8-8