The provisions of this chapter; the resolution of the council authorizing the issuance of the bonds; the contract of sale of the bonds; any indenture of trust executed in connection therewith; and the bonds, shall collectively constitute a contract with the holder or holders of the bonds, and no subsequent change in this chapter or in any law may in any way limit the rights of the holder or holders of the bonds or alter the obligations of the city under the terms of such contract until the entire principal of and interest and redemption premiums, if any, on such bonds have been fully paid or provision for the payment thereof made in accordance with the terms of such contract. (Ord. 337 § 3, 1986)