The full faith and credit of the municipality shall be pledged to the payment of the negotiable bonds. The governing body shall levy and collect, upon all the taxable property within the municipality subject to taxation, such taxes as are necessary to pay the interest on and the principal of the negotiable bonds as the interest and principal become due, without limitation as to rate or amount. The municipality may pay the principal of and interest on any general obligation bonds from any available revenues, and the levy or levies of taxes may be diminished to the extent such other revenues are available for the payment of such principal and interest.