(1) Redevelopment bonds and notes are payable out of the special fund created for each redevelopment district under this subchapter.
(2) The local governing body shall irrevocably pledge all or part of the special fund to the payment of the bonds or notes.
(3) The special fund, or the designated part thereof, may thereafter be used only for the payment of the bonds or notes and their interest until they have been fully paid.
(4) A holder of the bonds or notes shall have a lien against the special fund for payment of the bonds or notes and interest on them and may bring suit, either at law or in equity, to enforce the lien.