Section 48-150 - 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 delivery and payment thereof any and all of the persons whose signatures appear thereon have ceased to be officers of the district issuing the bonds.B. The validity of the bonds shall not be dependent on nor affected by the validity or regularity of any proceedings relating to the construction, improvement, reconstruction, acquisition or extension of the undertaking financed by the bonds or acquired in connection therewith.