Unless the note or notes so sold are payable out of current revenues of the city, the ordinance, authorizing their issuance and sale, shall direct the proper officers of the city to prepare and file in the court of quarter sessions of the proper county, a statement in the manner and form required by law; and council shall by the ordinance, authorizing the issuance of said notes, levy taxes for the years during which said notes shall be outstanding, sufficient to pay the same at maturity, with the interest and State tax thereon. The said notes, when issued, may be funded at any time by the issuance of bonds, as provided by law.