The notice shall state that the actual number of years during which the bonds will be outstanding, the actual total debt service to be paid on the bonds, and the actual average annual property tax to pay the principal of and interest on the bonds extendable against property containing a single family residence and having a fair market value of $100,000 are subject to change based on many factors, including market conditions at the time the bonds are sold. Any differences between the information set forth in the notice and the actual results at the time the bonds are sold shall not invalidate the hearing or the results of the referendum for the bonds.
30 ILCS 352/21