(a) Bonds and warrants issued under this subchapter are not a debt of the municipality that issues them and are a charge only against:
(1) the pledged revenues of the toll bridge; and
(2) the property comprising the toll bridge, if a lien is given on that property.
(b) A bond or warrant issued under this subchapter must include substantially the following provision: "The holder of this obligation is not entitled to demand payment of this obligation out of any money raised by taxation."