Sec. 159. 

The Board of Library Commissioners shall have power to control and order, in the manner in this Charter provided, the expenditures of all money coming into the library fund and to appropriate and expend the same for the purposes of the department, in accordance with the provisions of this Charter. Said board may invest any surplus funds under its control in bonds or other evidences of indebtedness of the United States, the State of California, or of any political subdivision thereof, and the income derived therefrom shall be deposited in the City treasury to the credit of the library fund.  (Amended, 1965.)