(1)    Any municipality, however incorporated, exercising functions of government after such incorporation may borrow money, within constitutional limitations, for the purpose of financing any building, improvement, work or other public undertaking for the furnishing, constructing, erecting, installing, or operating any public service, including sewers, water systems for fire protection and for public and industrial use, sewage disposal systems and plants, storm water relief sewers, channels and ditches, public highways and extensions thereof, or such other public necessities which its governing body may deem necessary for the protection of public health and safety and to prevent pollution of streams and water courses, notwithstanding that such incorporated municipality may be involved in or threatened with a civil action testing or questioning the incorporation of such municipality or the validity of any part of such incorporation and all proceedings of the governing body of such municipality authorizing the issuance of bonds, notes and other evidences of debts and all resolutions or ordinances adopted for such purposes and the execution and delivery of such evidences of indebtedness are hereby validated and shall be legal and enforceable obligations of such municipality with like force and effect as the obligations of regularly incorporated municipal corporations; and the determination by any court that such municipality is irregularly incorporated shall not affect the rights of creditors against the territory and assets of such purported incorporated municipality; the legislative intention being that there shall be no lapse of government or power of government to act for the general welfare, public interest and commercial betterment of such incorporated area during the pendency of any civil or threatened civil action. All taxes levied or to be levied in accordance with the provision made by such purported municipality for the collection of a direct annual tax sufficient to pay the interest on such bonds, notes or other evidence of debts and to pay and discharge the principal thereof, shall be valid and be levied and enforced against the territory of such purported municipality by the local governmental unit or units of which the territory may be a part.