It is the intent of this chapter that the power to issue obligations under this chapter and the validity of the bonds or notes so issued shall not be affected by, or be dependent in any way on the validity or the regularity of any proceedings for the issuance of any bonds or notes to be renewed, extended, retired, funded or refunded by the issuance of such obligations, and shall be independent of the power to make improvements or acquire property and shall not be dependent on or affected by the validity or regularity of any improvements or the acquisition of any property, or the authorization thereof, for the financing of which such bonds or notes are issued, or are to be issued.