The bonds authorized by this Act shall be sold and the proceeds thereof used solely for the specified purpose. At or before the time of delivery of any bond, the governing body of the governmental unit shall file with the clerk of the governmental unit its certificates, stating the amount of bonds to be issued, or denominations, rate of interest, where payable, and shall include a form of bond to be issued. The governing body of the governmental unit shall levy a direct tax upon all of the taxable property within the governmental unit sufficient to pay the principal and interest on the bonds as and when the same respectively mature. Such tax shall be in addition to all other taxes and shall not be within any rate limitation otherwise prescribed by law.
     The proceeds received from the sale of the bonds shall be placed in a special fund in the governmental unit treasury to be designated as the “Bond Community Mental Health Fund” and thereafter the governing body shall in the annual appropriation bill appropriate from such funds such sum or sums as may be necessary to carry out the provisions of this Section. Interest earned from moneys deposited in this Fund shall only be used for purposes which are authorized by this Act.