Section 9-533 - Validity of bondsA. Bonds issued under this article and bearing the signatures of officers in office on the date of the signing thereof shall be valid and binding obligations, notwithstanding that before the delivery thereof and payment therefor any or all of the persons whose signatures appear thereon have ceased to be officers of the municipality issuing the bonds.B. The validity of the bonds shall not be dependent on or affected by the validity or regularity of any proceedings relating to the construction, acquisition, improvement, reconstruction or extension of the utility undertaking financed by the bonds or taken in connection therewith.