The corporate authorities of a municipality may take any action that may be necessary to inform the owners of unpaid bonds regarding the financial condition of the municipality, the necessity of refunding its unpaid bonds and readjusting the maturities thereof in order that sufficient taxes may be collected to take care of these bonds, and thus re-establish the credit of the municipality. The corporate authorities may enter into any agreement required to prepare and carry out any refunding plan and, without any previous appropriation therefor under Section 8-2-1 or 8-2-9, may incur and pay expenditures that may be necessary in order to accomplish the refunding of the bonds of the municipality.
65 ILCS 5/8-4-9