The bonds shall bear the manual or facsimile signature of the officers of the city as may be designated in the bond ordinance and the manual or facsimile signatures shall be the valid and binding signatures of the officers of the city, notwithstanding that before the delivery thereof and payments therefore any or all of the persons whose signatures appear thereon have ceased to be officers of the city. The validity of the bonds is not dependent on or affected by the validity or regularity of any proceedings relating to the acquisition, purchase, construction, reconstruction, improvement, equipping, betterment or extension of the project for which the bonds are issued. The bond ordinance may provide that the bonds shall contain a recital that they are issued pursuant to this subchapter, which recital shall be conclusive evidence of their validity and of the regularity of their issuance.
(1980 Code, § 13.1408)