(a) An obligation issued under this subchapter:
(1) is not a debt of the municipality;
(2) may be a charge only on the revenue pledged for the payment of the obligation; and
(3) may not be included in determining the power of the municipality to issue bonds for any purpose authorized by law.
(b) Each contract, bond, note, or other evidence of indebtedness issued or included under this subchapter must contain the following provision: "The holder of this obligation is not entitled to demand payment of this obligation out of any money raised by taxation."